Patterson-UTI Energy
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

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FORM 10-K
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(MARK ONE)
[X]ANNUAL REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2000

OR

[ ]
TRANSITION REPORT UNDER SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE
ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO

COMMISSION FILE NUMBER 0-22664

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PATTERSON ENERGY, INC.
(Exact name of registrant as specified in its charter)

<TABLE>
<S> <C>
DELAWARE 75-2504748
(State or other jurisdiction of (I.R.S. Employer Identification No.)
incorporation or organization)
</TABLE>

<TABLE>
<S> <C>
P.O. BOX 1416, 4510 LAMESA HIGHWAY, SNYDER, TEXAS 79550
(Address of principal executive offices) (Zip Code)
</TABLE>

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Registrant's telephone number, including area code: (915) 573-1104
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Securities Registered Pursuant to 12(b) of the Act: None
Securities Registered Pursuant to 12(g) of the Act:
Preferred Stock Purchase Rights

(TITLE OF CLASS)
Common Stock, $.01 Par Value

Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes [X] No [ ]

Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of the Regulation S-K is not contained herein, and will not be contained, to
the best of the registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K [X]

The aggregate market value of the voting and non-voting common equity held
by non-affiliates of the registrant as of March 1, 2001 was $1,345,204,584,
based upon the average bid and asked prices of $35.94 and $36.06, respectively,
on the Nasdaq National Market.

As of February 27, 2001, the registrant had outstanding 38,049,706 shares
of common stock, $.01 par Value, its only class of voting stock.

<TABLE>
<CAPTION>
PART OF
FORM 10-K DOCUMENT INCORPORATED BY REFERENCE
- --------- ----------------------------------
<S> <C>
PART III Portions of proxy statement to be filed pursuant to Schedule
14A relating to election of directors.
</TABLE>

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2

PART I

Patterson may from time to time make written or oral forward-looking
statements, including statements contained in our filings with the Securities
and Exchange Commission ("SEC") and or reports to stockholders. Items 1 and 2
contain forward-looking statements and are made pursuant to the "safe harbor"
provisions of the Private Securities Litigation Reform Act of 1995. These
statements include, without limitation, statements relating to:

- utilization rates of drilling rigs,

- crude oil and natural gas prices,

- volatility of dayrates for contract services,

- drilling and completion of wells,

- well operations,

- drilling and completion fluids services,

- business strategies and other plans and objectives of our management for
future operations and activities,

- capital needs, and

- reserve estimates (including estimates for future net revenues associated
with such reserves and the present value of such future net reserves).

The words "believes," "budgeted," "expects," "project," "will," "could," "may,"
"plans," "intends," "strategy," or "anticipates," and similar expressions used
in this document identify forward-looking statements. We do not undertake to
update, revise or correct any of the forward-looking information. Readers are
cautioned that such forward-looking statements should be read in conjunction
with our disclosures under the heading: "Cautionary Statement for Purposes of
the 'Safe Harbor' Provisions of the Private Securities Litigation Reform Act of
1995" beginning on page 20.

------------------------------

ALL NUMERICAL INFORMATION CONTAINED IN THIS REPORT RELATING TO PATTERSON
COMMON SHARES REFLECTS THE TWO-FOR-ONE SPLITS OF ITS COMMON STOCK IN JULY 1997
AND IN JANUARY 1998.

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ITEMS 1 AND 2. BUSINESS AND PROPERTIES.

OVERVIEW

Patterson is one of the leading providers of domestic land-based drilling
services to major and independent oil and natural gas companies. Formed in 1978
and reincorporated in 1993 as a Delaware corporation, we focus our operations
in:

- Texas,

- New Mexico,

- Oklahoma,

- Louisiana,

- Mississippi, and

- Utah.

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3

We currently have a drilling fleet of 152 drilling rigs, 140 of which are
currently marketable. A drilling rig includes the structure, power source and
machinery necessary to cause a drill bit to penetrate rock to a depth desired by
the customer. A marketable drilling rig is a rig that is fully operable.

We provide contract drilling and completion fluids services to other oil
and natural gas operators. Drilling and completion fluids are used by oil and
natural gas operators during the drilling process to control pressure when
drilling oil and natural gas wells. We are also engaged in the development,
exploration, acquisition and production of oil and natural gas.

CONTRACT DRILLING OPERATIONS. We have established a reputation for
reliable, high quality drilling equipment and well-trained crews. We continually
seek to modify and upgrade our equipment to maximize the performance and
capabilities of the drilling rig fleet, which we believe provides us with a
competitive advantage. Additionally, we have the in-house capability to design,
manufacture, refurbish, repair and modify our drilling rigs. Of our drilling
rigs, 95 are capable of drilling to depths of 12,000 feet and greater, including
52 that are capable of drilling to 15,000 feet and greater. During fiscal year
2000, we drilled 1,485 wells for 224 non-affiliated customers maintaining an
average rig utilization rate of 74%. A rig is utilized when it is operating or
being moved, assembled or dismantled under contract.

Over the past several years, our operations have expanded through a series
of acquisitions. Since 1993, when we had 13 drilling rigs, we have increased our
contract drilling fleet through acquisitions to 152 drilling rigs. From 1993
(prior to giving effect to the 1996 merger with Tucker Drilling Company, Inc.
which was treated as a pooling of interests for financial accounting purposes)
through 2000, our consolidated operating revenues have increased from $25.0
million to $307.9 million.

OIL AND NATURAL GAS OPERATIONS. Our oil and natural gas activities are
designed to complement our land drilling operations and diversify our overall
business strategy. These activities are primarily focused in mature producing
regions in the Permian Basin and South Texas. Oil and natural gas operations
comprised approximately 5% of our consolidated operating revenues for the year
2000. At December 31, 2000, our proved developed reserves were approximately 1.8
million BOE and had a present value (discounted at 10% before income taxes) of
estimated future net revenues of approximately $22.8 million.

The business strategy for our oil and natural gas operations is to increase
our oil and natural gas reserves primarily through developmental and exploratory
drilling in producing areas. Although, from time to time, we will participate
through a working interest in an exploratory well, the focus of our drilling
activities for the foreseeable future in our oil and natural gas operations will
be developmental drilling in the Permian Basin of West Texas and Southeastern
New Mexico and in South Texas.

DRILLING AND COMPLETION FLUIDS OPERATIONS. We also provide contract
drilling and completion fluids services to numerous operators in the oil and
natural gas industry. Operating revenues derived from these activities
constituted approximately 10% of our consolidated operating revenues. We believe
that these contract services integrate well with our other core operating
activities. Our drilling fluids operations began with the acquisitions of Lone
Star Mud, Inc., during January 1998 and Tejas Drilling Fluids, Inc., in
September 1998. These operations are conducted in the Permian Basin of West
Texas, Southeast New Mexico and South Texas. We further expanded our contract
services for drilling fluids, as well as added services for completion fluids,
with our acquisition of the drilling and completion fluids division of Ambar,
Inc., in October 2000. These operations are principally located in Lafayette,
Louisiana, with numerous stockpoint facilities strategically located in
Oklahoma, New Mexico, along the southern coasts of Louisiana and Texas and the
Gulf Coast area of South Texas.

------------------------------

On February 5, 2001, we announced that our board of directors along with
the board of directors of UTI Energy Corp., approved a merger of the two
companies with Patterson as the surviving entity. According to the terms of the
merger agreement between UTI and Patterson, stockholders of UTI will receive one
common share of Patterson for each common share of UTI, and Patterson will
assume UTI's outstanding options and warrants. The board of directors of the new
company will consist of eleven directors, six of whom will be

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selected by Patterson from its existing board and five of whom will be selected
by UTI. Although the merger agreement does not specify who will be the officers
of the new company, we expect that Mark S. Siegel, UTI's Chairman of the Board,
would be the Chairman of the Board, and Cloyce A. Talbott, Patterson's Chairman
of the Board and Chief Executive Officer, would be Chief Executive Officer. The
combined company will be the second largest United States land-based drilling
service contractor with 302 drilling rigs and is expected to be called
"Patterson-UTI Energy, Inc."

Under the terms of the merger agreement, both UTI and Patterson have agreed
not to solicit competing offers, but the boards of directors of each company are
free to consider and accept an unsolicited offer if, based on the advice of
counsel, it believes it must do so in the exercise of its fiduciary duty. In the
event a party accepts an unsolicited offer, or its board of directors withdraws
its recommendation in light of an unsolicited offer or the stockholders do not
vote to approve the merger because of an unsolicited offer, the other party
would be entitled to receive a breakup fee of $32.5 million plus reimbursement
of expenses of up to $2.5 million. In the event the stockholders of one party do
not vote to approve the merger and the other party is not in default and is
ready, willing and able to perform its agreement, the party whose stockholders
vote against the merger will be required to pay to the other party $2.5 million,
plus up to an additional $2.5 million in expenses.

------------------------------

BUSINESS STRATEGY

Our strategy is to increase cash flow and earnings per share by enhancing
our position as a leading domestic land-based drilling contractor. The principal
components of this strategy are as follows:

- STRONG INDUSTRY REPUTATION. We believe that Patterson has a strong
reputation within our existing markets for providing well maintained
equipment, high quality service and experienced personnel. We intend to
build on existing customer relationships in each of our areas of
operations by offering technically sophisticated drilling equipment and
providing quality service to our customers with an emphasis on
efficiency, dependability and safety.

- HIGH QUALITY ASSET BASE. Our drilling rigs are maintained in good
operating condition through an established program of modifications and
upgrades. We believe that the quality and operating condition of our
drilling equipment allows us to maximize utilization rates and pricing.

- CONTINUED GROWTH THROUGH ACQUISITION. We believe that attractive
acquisition opportunities continue to exist to further expand our
drilling rig fleet in our core geographic operating areas as well as into
other areas. Following an acquisition, we refurbish the acquired drilling
rigs to our standards of quality and dependability.

- EFFICIENT OPERATIONS. Based on publicly available information, we
believe that we had one of the most competitive ratios of EBITDA to
revenues in the U.S. land-based drilling industry during 2000. We
produced these results from the combination of providing premium contract
drilling services and operating under an efficient cost structure. In
addition, we have achieved cost reductions and efficiencies through
acquisition-related synergies. Furthermore, we use our fleet of trucks
and trailers to rig down, transport and rig up our drilling rigs, which
further increases efficiency by reducing the time and costs associated
with these ancillary operations.

RECENT ACQUISITIONS

Jones Drilling Corporation. On January 5, 2001, we completed the
acquisition of Jones Drilling Corporation and the assets of three related
entities, Henderson Welding, Inc., L.E.J. Truck and Crane, Inc., and L.E. Jones
Drilling Company. Each of the four companies were based in Duncan, Oklahoma. The
assets acquired as a part of these transactions consisted of:

- 21 contract drilling rigs, 14 of which are marketable,

- a fleet of rig moving trucks,

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5

- drilling facilities, and

- shops and equipment yards located in Duncan, Oklahoma, and Bridgeport,
Texas.

The drilling rigs range from 450 to 1,000 horsepower with 12 rigs having a
drilling capacity of 12,000 feet and greater, with four of those rigs capable of
drilling to depths greater than 15,000 feet. The purchase price consisted of
810,070 shares of our common stock valued at $26.8125 per share and $10.9
million cash, net of certain working capital adjustments. The common shares have
been registered for resale with the SEC.

Ambar, Inc. On October 3, 2000, we acquired, through a wholly-owned
subsidiary, certain assets and assumed certain liabilities of the drilling and
completion fluids division of Ambar, Inc. Ambar was a privately owned company
with principal operations in Louisiana, the Gulf Coast region of South Texas and
the Gulf of Mexico. Pursuant to the transaction, we acquired working capital of
approximately $7.8 million (current assets of $18.2 million and current
liabilities assumed of $10.4 million), fixed assets valued at $15.7 million and
other trademarks and intellectual property specific to the division's
operations. Consideration paid included cash of $12.4 million after a $3.9
million credit for certain working capital adjustments and included $680,000 of
direct costs incurred related to the acquisition.

High Valley Drilling, Inc. On June 2, 2000, we closed the acquisition of
High Valley Drilling, Inc., a privately-owned, non-affiliated company based in
Oklahoma City, Oklahoma. The assets consisted of eight non-marketable drilling
rigs and other related equipment. The drilling rigs, when completely
refurbished, will have depth capacities of at least 15,000 feet, with three of
the rigs expected to have a depth rating of 25,000 feet. By the end of 2000,
four of the rigs had been placed into service with two additional rigs placed
into service during February 2001. Consideration for the acquisition consisted
of 1,150,000 restricted shares of our common stock, three-year warrants to
acquire an additional 127,000 shares at an exercise price of $22.00 per share
and $208,000 of direct costs incurred related to the acquisition. The shares and
warrant shares have been registered for resale with the SEC. Our common shares
were valued at $18.00 per share for purposes of recording the acquisition as a
purchase. This value represented the market price of the shares on the day the
acquisition was announced. Using a Black-Scholes model, the warrants were valued
at $900,000 for purposes of this transaction.

WEK Drilling Co., Inc. On March 31, 2000, we acquired WEK Drilling
Company, Inc., a privately-owned, non-affiliated company based in Southeast New
Mexico. The purchase price for WEK totaled $6.8 million which is net of cash
acquired, and $77,000 of direct costs incurred related to the acquisition. The
assets acquired included four marketable land-based drilling rigs and other
related equipment and working capital of approximately $1.2 million. Three of
the rigs have depth capacities greater than 12,000 feet and one has a depth
rating of 10,500 feet. The acquisition was funded using $5.66 million of
proceeds from our credit facility and 53,000 shares of our common stock valued
at $29.0625 per share based on the average trading price of the Company's common
stock 10 trading days prior to consummation. Certain assets, unrelated to the
drilling business, were resold to one of the former WEK owners for $1.0 million
cash. The common shares have been registered for resale with the SEC.

INDUSTRY SEGMENTS

Our revenues, operating profits and identifiable operating assets are
primarily attributable to three industry segments:

- contract drilling,

- oil and natural gas exploration, development, acquisition and production,
and

- drilling and completion fluids services.

With respect to these three segments:

- the contract drilling segment had an operating profit in 1998 and 2000,
and an operating loss for the year 1999,

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6

- the oil and natural gas segment had an operating profit in 1999 and 2000,
and an operating loss for the year 1998, and

- the drilling and completion fluids segment had an operating profit in
1998, and an operating loss in 1999 and 2000.

See "Management's Discussion and Analysis of Financial Condition and Results of
Operations" and Note 14 of Notes to Consolidated Financial Statements included
as a part of Items 7 and 8, respectively, of this document for financial
information pertaining to these industry segments.

CONTRACT DRILLING OPERATIONS

GENERAL. We market our contract drilling services to major oil companies
and independent oil and natural gas producers. We currently own 152 drilling
rigs, 140 of which are currently marketable, with:

- 99 based in Texas (49 in West Texas, 27 in South Texas, 12 in East Texas
and 11 in North Texas),

- 20 based in New Mexico,

- nine based in Oklahoma,

- four based in Louisiana,

- four based in Utah, and

- four based in Mississippi.

Fifteen of our drilling rigs are diesel electric rigs, all of which are
marketable, and 137 of our drilling rigs are mechanical rigs of which, 125 rigs
are considered marketable. An electric rig differs from a mechanical rig in that
the electric rig converts the diesel power (the sole energy source for a
mechanical rig) into electricity to power the rig. Our drilling rigs have rated
maximum depth capabilities ranging from 8,000 feet to 25,000 feet.

Our marketable drilling rigs are equipped with:

- engines,

- drawworks or hoists,

- derricks or masts,

- pumps to circulate the drilling fluid,

- blowout preventers,

- drill string (pipe), and

- related equipment.

Depth of the well and drill site conditions are the principal factors in
determining the size and type of drilling rig used for a particular job. Our
drilling rigs are utilized for both exploratory and developmental drilling and
can be used for either vertical or horizontal drilling.

In order to drill a well, the operator of the well assembles a number of
different contractors to provide the necessary services. Included among these
contractors are the drilling contractors, such as Patterson, plus other
contractors specializing in such matters as logging, completion and, in the case
of horizontal wells, specialists in the technical aspects of such drilling.

We have achieved our current position as a leading provider of contract
drilling services in our areas of operations by providing high quality services
to our customers at competitive rates. Although generally of lesser importance
than price, we believe that the condition of a drilling fleet, the reputation of
the contract driller and the quality and experience of the drilling supervisors
in the field have significant importance to prospective customers. We will
continue to strive to maintain our drilling fleet in good working condition.

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7

In addition to normal repair and maintenance expenses, we spend significant
funds each year on an ongoing program of modifying and upgrading our drilling
rigs. We also strive to employ experienced and dedicated drilling supervisors
for our various drilling rigs in the field. We intend to continue our ongoing
rig maintenance program and to retain high quality, experienced drilling
supervisors in order to build upon our reputation in the market place. In
addition, if favorable opportunities arise, we may seek to further expand our
drilling rig fleet through selected acquisitions.

DRILLING CONTRACTS. Most of our drilling contracts are with established
customers and are obtained on a competitive bid basis. Some contracts are
obtained on a negotiated basis. Generally, the contracts are entered into for
short-term periods and cover the drilling of a single well with the terms and
rates varying depending upon the nature and duration of the work, the equipment
and services supplied and other matters.

The drilling contracts obligate us to pay certain operating expenses,
including wages of drilling personnel and necessary maintenance expenses to
furnish incidental drilling rig supplies and equipment. The contracts are
subject to termination by the customer on short notice, usually upon payment of
a fee. We generally indemnify our customers against claims by our employees and
claims arising from surface pollution caused by spills of fuel, lubricants and
other solvents within our control. The customers generally indemnify us against
claims arising from other surface and subsurface pollution, except claims
arising from our own gross negligence.

The contracts provide for payment on a daywork, footage or turnkey basis,
or a combination thereof. Our bids for each contract depend upon:

- the anticipated complexity of drilling the well,

- the on-site drilling conditions,

- the type of equipment to be used,

- our estimate of the risks involved,

- the estimated duration of the work to be performed, and

- other considerations.

All of the horizontal wells we have drilled have been priced either on a
turnkey or footage basis during the vertical drilling phase and on a daywork
basis beyond that point.

Under daywork contracts, we provide the drilling rig, including the
required personnel, to the operator. The operator then supervises the drilling
of the contracted well. Our compensation is based on a negotiated rate per day
during the period the drilling rig is utilized. Daywork contracts generally
specify:

- the type of equipment to be used,

- the size of the hole, and

- the proposed depth of the well.

Under a daywork contract, we continue to earn revenue, even though drilling
may be temporarily suspended (such as time delays for various reasons, including
stuck drill strings and blow-outs).

Footage contracts usually require us to bear some of the drilling costs in
addition to providing the drilling rig. Under a footage contract, we would
normally determine the manner of drilling and type of equipment to be used,
subject to certain customer specifications. We would also bear the risk and
expense of:

- mechanical malfunctions,

- equipment shortages, and

- other delays arising from drilling problems.

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8

Compensation under a footage contract is based on a rate-per-foot-drilled
basis at completion of the well. Prices of both footage and daywork contracts
vary depending upon various factors, such as:

- the location, depth, duration and complexity of the well to be drilled,

- operating conditions, and

- other factors particular to each proposed well.

Under turnkey contracts, we contract to drill a well to a certain depth
under specified conditions and provide most of the equipment and services
required. We bear the risk of drilling the well to the specified depth. In
return, our compensation is usually substantially greater than on wells we drill
on a daywork or footage basis. If severe drilling problems are encountered in
drilling wells under turnkey contracts, we would sustain substantial losses
under that contract.

The following table sets forth the approximate percentage of our drilling
revenues attributable to daywork, footage and turnkey contracts:

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
-------------------------
TYPE OF REVENUES 1998 1999 2000
- ---------------- ---- ---- ----
<S> <C> <C> <C>
Daywork..................................................... 64% 58% 72%
Footage..................................................... 24 22 20
Turnkey..................................................... 12 20 8
</TABLE>

At December 31, 2000, we had 100 wells in progress of which 94 were under
daywork contracts, 6 under footage contracts and there were no turnkey contracts
in place.

Contract drilling operations depend on the availability of:

- drill pipe,

- bits and other related rig equipment,

- fuel, and

- qualified personnel, some of which have been in short supply from time to
time.

As favorable buying opportunities arise, we stockpile drill pipe, bits and other
drilling rig parts. Currently, drill pipe, other rig equipment and rig personnel
are in short supply.

Our ability to drill wells for which we have contracts may be delayed by
inclement weather. Sustained periods of inclement weather may materially effect
our revenues and cash flows.

CONTRACT DRILLING ACTIVITY. The following table sets forth certain
information regarding our contract drilling activity for each of the last three
years:

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
-----------------------
1998 1999 2000
---- ---- ----
<S> <C> <C> <C>
Number of wells drilled..................................... 1,028 842 1,485
Average rigs available for service.......................... 106 114 119
Average rig utilization rate(1)............................. 54% 45% 74%
</TABLE>

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(1) Rig utilization is based on a 365-day year for rigs available for service
during 1998 and 1999, and a 366-day year for rigs available in 2000. A rig
is utilized when it is operating or being moved, assembled or dismantled
under contract.

CUSTOMERS. During the year 2000, we drilled wells for 224 non-affiliated
customers. This compares with 189 non-affiliated customers during the year 1999.
No single customer accounted for 10% or more of our consolidated operating
revenues during 2000. We do not believe that the loss of any one customer would
have a material adverse effect on our operations.

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9

Our customers in the past 12 months have included, among others:

- Coastaldril Inc.,

- Cross Timbers Operating,

- Devon Energy Production Company, L.P.,

- EOG Resources,

- Fina Oil and Chemical,

- J.W. Operating Co.,

- Louis Dreyfus Natural Gas,

- Matador Petroleum Corp.,

- Mitchell Energy Corp.,

- Oxy USA, Inc.,

- Union Pacific Resource Company,

- United Oil and Minerals, Inc., and

- Yates Petroleum Corp.

At the end of 2000, we were drilling a total of 100 wells. Three of these
wells were being drilled for affiliated parties.

DRILLING RIGS AND RELATED EQUIPMENT. The following table provides certain
information concerning our drilling rigs as of December 31, 2000:

<TABLE>
<CAPTION>
DIESEL
DEPTH RATING (FT.) MECHANICAL ELECTRIC
- ------------------ ---------- --------
<S> <C> <C>
8,000 to 9,999.............................................. 25(1) --
10,000 to 11,999............................................ 23 --
12,000 to 14,999............................................ 33(2) 2
15,000 and greater.......................................... 35(2) 13
----- ----
Totals............................................ 116 15
===== ====
</TABLE>

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Note: The above table does not reflect the 21 drilling rigs acquired in January
2001.

(1) Includes three nonmarketable rigs.

(2) Includes two nonmarketable rigs.

We currently own 129 trucks and 152 trailers. This equipment is used to rig
down, transport and rig up our drilling rigs. This minimizes Patterson's
dependency upon third parties for these ancillary services and further enhances
the efficiency of our contract drilling operations.

Most repair work and overhaul of our drilling rig equipment is performed at
our yard facilities variously located in Texas, New Mexico and Oklahoma. We
believe that our marketable drilling rigs and related equipment are in good
operating condition. In addition to normal repair and maintenance expenses, we
have historically spent significant funds for our ongoing program of modifying
and upgrading our equipment.

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10

OIL AND NATURAL GAS OPERATIONS

GENERAL. We have been engaged in the development, exploration, acquisition
and production of oil and natural gas since 1982. Our oil and natural gas
activities are designed to complement our land drilling operations and are
primarily concentrated in two operating areas:

- the Permian Basin of West Texas and Southeast New Mexico, and

- South Texas.

Our strategy for our oil and natural gas operations is to increase our
reserve base primarily through developmental drilling, as well as selected
acquisitions of leasehold acreage and producing properties. At the end of year
2000, we were the operator of 164 wells.

OIL AND NATURAL GAS RESERVES. We engaged M. Brian Wallace, P.E., Dallas,
Texas, an independent petroleum engineer, to estimate our proved developed
reserves, projected future production and estimated future net revenues from our
proved developed reserves as of the end of 1998, 1999 and 2000. Mr. Wallace's
estimates were based upon a review of production histories and other geologic,
economic, ownership and engineering data provided by us. In determining the
estimates of the reserve quantities that are economically recoverable, Mr.
Wallace used oil and natural gas prices and estimated average development and
production costs provided by us.

The following table sets forth information as of the end of 1998, 1999 and
2000, derived from the reserve reports of Mr. Wallace. The present values
(discounted at 10% before income taxes) of estimated future net revenues shown
in the table are not intended to represent the current market value of the
estimated oil and natural gas reserves owned by us. For further information
concerning the present value of estimated future net revenues from these proved
developed reserves, see Note 19 of the Notes to Consolidated Financial
Statements included as a part of Item 8 of this document.

<TABLE>
<CAPTION>
AS OF DECEMBER 31,
--------------------------------
1998 1999 2000
---- ---- ----
(IN THOUSANDS)
<S> <C> <C> <C>
Proved Developed Reserves:
Oil (Bbls)....................................... 946 1,205 1,129
Gas (Mcf)........................................ 3,490 4,118 3,880
Total (BOE)...................................... 1,528 1,891 1,776
Estimated future net revenues before income
taxes............................................ $ 9,232 $ 24,741 $ 31,891
Present value of estimated future net revenues
before income taxes, discounted at 10%........... $ 6,770 $ 17,240 $ 22,801
</TABLE>

A barrel (Bbl) of oil is 42 U.S. gallons and represents the basic unit for
measuring production of crude oil and condensate.

An Mcf of natural gas refers to a volume of 1,000 cubic feet under
prescribed conditions of pressure and temperature and represents the basic unit
for measuring volumes of produced gas. A barrel of equivalent (BOE) in reference
to natural gas equivalents is determined using the rate of six Mcf of natural
gas (including natural gas liquids) to one Bbl of crude oil or condensate.

Proved oil and gas reserves are the estimated quantities of natural gas and
crude oil which geological and engineering data demonstrate with reasonable
certainty to be recoverable in future years from known reservoirs under existing
economic and operating conditions. Reserves are considered proved if economical
productibility is supported by either actual production or conclusive formation
tests. Reserves which can be produced economically through application of
improved recovery techniques are included in the "proved" classification when
successful testing by a pilot project or the operation of an installed program
in the reservoir provides support for the engineering analysis on which the
project or program was based. Proved developed oil and natural gas reserves can
be expected to be recovered through existing wells with existing equipment and
operating methods.

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The reserve data set forth above represents only estimates. The estimates
are based on various assumptions and, therefore, are inherently imprecise. Our
actual future production, revenues, taxes, production costs and development
costs may vary substantially from those assumed in the estimates. Any
significant variance could materially affect the estimates set forth in this
document. In addition, the reserve data may be subject to upward or downward
revisions depending upon, among other factors, production history and prevailing
oil and natural gas prices. Oil and natural gas prices have fluctuated widely in
recent years. There is no assurance that prices will be higher or lower than
prices used in estimating our reserves.

PRODUCTION. Our wells in South Texas primarily produce natural gas and in
the Permian Basin primarily produce oil. The following table sets forth our:

- net oil and natural gas production,

- average sales price, and

- average production costs

associated with our production during the periods indicated.

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31
------------------------------
1998 1999 2000
---- ---- ----
<S> <C> <C> <C>
Average net daily production:
Oil (Bbls)......................................... 835 698 752
Gas (Mcf).......................................... 2,742 2,745 3,784
Total (BOE)........................................ 1,292 1,156 1,383
Average sales prices:
Oil (per Bbl)...................................... $ 12.16 $ 18.08 $ 29.99
Gas (per Mcf)...................................... 1.93 2.22 3.87
Average production (lifting) costs (per BOE)......... $ 4.08 $ 4.08 $ 6.41
</TABLE>

PRODUCTIVE WELLS. The following table sets forth information regarding the
number of productive wells in which we held a working interest as of the end of
2000. One or more completions in the same well bore are reflected as one well.

<TABLE>
<CAPTION>
PRODUCTIVE WELLS
----------------
GROSS NET
------ ---
<S> <C> <C>
Oil......................................................... 188 33.48
Gas......................................................... 100 16.38
--- -----
Total............................................. 288 49.86
=== =====
</TABLE>

A productive well is a well producing oil or natural gas in commercial
quantities. A working interest is the operating interest under an oil and
natural gas lease. It gives the owner the right to explore for and produce oil
and natural gas from the lease.

DEVELOPED AND UNDEVELOPED ACREAGE. The following table sets forth the
developed and undeveloped acreage in which we owned a working interest at the
end of 2000:

<TABLE>
<CAPTION>
DEVELOPED UNDEVELOPED
--------------- ---------------
LOCATION GROSS NET GROSS NET
- -------- ----- --- ----- ---
<S> <C> <C> <C> <C>
South Texas........................................ 43,702 8,264 45,785 10,739
Permian Basin...................................... 19,594 3,101 17,186 2,282
------ ------ ------ ------
Total.................................... 63,296 11,365 62,971 13,021
====== ====== ====== ======
</TABLE>

Undeveloped acreage is leased acres on which wells have not been drilled to
a point that would permit production of commercial quantities of oil and natural
gas. Developed acreage is leased acres that have been assigned to productive
wells. Our gross acreage is the total number of acres, developed or undeveloped,
in

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which we own a working interest, regardless of the size of our working interest
in the acreage. Our net acreage is the gross acreage proportionally reduced by
our working interest in the acreage.

Many of our leases summarized in the table above as undeveloped acreage
will expire at the end of their respective primary terms unless production has
been obtained from the acreage prior to that date. If production is obtained,
the lease will remain in effect until the cessation of production. The following
table sets forth the gross and net acreage subject to leases summarized in the
table of undeveloped acreage that will expire:

<TABLE>
<CAPTION>
LEASE ACRES EXPIRING
--------------------
GROSS NET
----- ---
<S> <C> <C>
Years ending:
December 31, 2001........................................... 15,395 3,056
December 31, 2002........................................... 6,400 1,605
December 31, 2003 and later................................. 41,176 8,360
------ ------
Total............................................. 62,971 13,021
====== ======
</TABLE>

DRILLING ACTIVITIES. The following table sets forth the results of our
participation in the drilling of developmental and exploratory wells during
1998, 1999 and 2000:

<TABLE>
<CAPTION>
DEVELOPMENT WELLS EXPLORATORY WELLS
---------------------------- ---------------------------
PRODUCTIVE DRY HOLES PRODUCTIVE DRY HOLES
------------- ------------ ------------ ------------
YEAR ENDED DECEMBER 31, GROSS NET GROSS NET GROSS NET GROSS NET
- ----------------------- ----- --- ----- --- ----- --- ----- ---
<S> <C> <C> <C> <C> <C> <C> <C> <C>
1998.................................. 23 4.45 6 1.74 3 .55 13 2.16
1999.................................. 27 5.21 7 1.71 8 1.00 4 .48
2000.................................. 16 3.63 14 3.33 4 .50 3 .57
-- ----- -- ---- -- ---- -- ----
Total....................... 66 13.29 27 6.78 15 2.05 20 3.21
== ===== == ==== == ==== == ====
</TABLE>

Generally, a developmental well is a well that is drilled into an oil and
gas reservoir that is known to be productive. An exploratory well is a well that
is drilled to find oil and gas in an unproved area.

MARKETING OF CRUDE OIL AND NATURAL GAS. Crude oil is sold based upon
30-day automatically renewable contracts with oil purchasers. The actual prices
we realize vary as world oil prices fluctuate. Due to competitive conditions, we
do not believe that the loss of any one of our major crude oil purchasers would
have a material adverse effect on our business. We market oil produced from our
operated wells through a wholly-owned subsidiary.

Most of our natural gas is sold through third-party natural gas brokers at
spot market prices and is transported to market by interstate pipelines.
Contracts with these brokers are currently for less than five years and allow
for prices to adjust to the marketplace. We believe that, because of the
competitive nature of the industry today, the loss of any one of our natural gas
purchasers would not have a material adverse effect on our business. While we
have not experienced any inability to market our natural gas, if transportation
space in the pipelines is restricted or is unavailable, our cash flow from our
oil and natural gas operations would be adversely affected.

Historically, we have not entered into any derivative transactions to hedge
our production of oil and natural gas.

No customer for our oil and natural gas accounted for more than 10% of our
consolidated revenues for the year 2000.

TITLE TO OIL AND NATURAL GAS PROPERTIES. Title to our oil and natural gas
properties is subject to royalty, overriding royalty, carried working, and other
similar interests and cost sharing arrangements customary in the oil and natural
gas industry (including farmout agreements, operating agreements and joint
venture arrangements), liens for current taxes not yet due, and to other minor
defects and encumbrances. We believe

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that such burdens do not materially detract from the value of such properties or
from our interest therein or materially interfere with the operation of our
business.

As is customary in the oil and natural gas industry in the case of
undeveloped properties, an in-house title review is made prior to or at the time
of acquisition. More comprehensive title investigations, including in most
cases, receipt of a title opinion of legal counsel, are generally made before
commencement of drilling operations on undeveloped properties and also are
generally made before consummation of an acquisition of developed properties.

DRILLING AND COMPLETION FLUIDS OPERATIONS

GENERAL. We provide drilling fluids, completion fluids and related
services to oil and natural gas producers in the Permian Basin of West Texas and
Southeast New Mexico, South Texas, East Texas, Oklahoma, the Gulf Coast regions
of Texas and Louisiana and the Gulf of Mexico. We are a technically oriented
supplier of drilling and completion fluids and target customers and projects
where technical expertise is more valued than product price. We serve our
land-based and offshore customers through seven stockpoints strategically
located along the Gulf of Mexico in Texas and Louisiana, and seven land-based
stockpoints in Louisiana, Texas, Oklahoma and New Mexico.

DRILLING FLUIDS. Our product sales are supported by a technical service
organization dedicated to product application on the customer's wellsite.
Drilling fluids products and systems are used to cool and lubricate the bit
during drilling operations, contain formation pressures (thereby preventing a
blowout), suspend and remove rock cuttings from the hole and maintain the
stability of the wellbore. Technical services are provided to ensure that the
products and systems are applied effectively to optimize drilling operations.
These services include:

- recommending products and services during the well planning phase,

- testing drilling fluid properties and recommending adjustments during the
drilling phase, and

- analyzing well results after the project is complete to improve the
performance of wells to be drilled in the future.

COMPLETION FLUIDS. After the well is drilled it undergoes the completion
process wherein the well casing is set and cemented in place. At that point, the
role of the drilling fluid is complete, and it is circulated out of the well and
replaced with completion fluid.

Completion fluids, also known as clear brine fluids, are solids-free, clear
salt solutions that have high specific gravities. Combined with a range of
specialty chemicals, these fluids are used by operators in the oil and natural
gas industry to control bottom-hole pressures and to meet a well's specific
corrosion, inhibition, viscosity, and fluid loss requirements during the
completion and workover phases. These systems are specially designed to maximize
well production by minimizing formation damage that can be caused by
solids-laden systems. We provide a complete line of completion fluids products
and services, including:

- a full range of low- and high-density brines,

- specialty chemicals,

- filtration and chemical treatment services used in the reclamation of
these specialized fluids, and

- technical engineering and laboratory support services.

OTHER SERVICES. In addition to the core drilling and completion fluids
business, we offer a broad range of on-site fluid filtration, handling and
recycling services. We also rent equipment related to our product and service
lines and provide dock services at our stockpoints that service offshore
operations. Rental products offered include portable liquid storage tanks for
use by offshore or onshore operators, cutting boxes used to transport well
cuttings, pumps and heavy equipment.

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STOCKPOINTS. We serve our offshore customers through seven strategically
located coastal stockpoints, each with dockside loading capacities. Our offshore
service stockpoints are located in:

- Galveston (TX),

- Cameron (LA),

- Intercoastal City (LA),

- Berwick (LA),

- Houma (LA),

- Fourchon (LA), and

- Venice (LA).

Other than our Galveston facility, we lease all our offshore stockpoints.
In addition to these offshore stockpoints, we have seven land based stockpoints
that allow us to service clients in Texas, Louisiana, Oklahoma and New Mexico.

RAW MATERIALS. Our drilling fluids operations depend on the availability
of the following raw materials:

- barite, and

- bentonite.

Our completion fluids operations depend upon the availability of the
following raw materials:

- calcium chloride,

- calcium bromide, and

- zinc bromide.

We obtain these raw materials through:

- purchases made on the spot market for these materials, and

- supply contracts with producers of these raw materials.

EQUIPMENT. We own 20 trucks and 112 trailers and lease another 26 trucks.
This equipment is used to transport drilling and completion fluids and related
equipment. This minimizes our dependency upon third parties for these ancillary
services and further enhances the efficiency of our fluids operations.

CUSTOMERS. For the year 2000, we supplied drilling and completion fluids,
and related services to 182 non-affiliated customers. This compares with 128
non-affiliated customers for 1999. During 2000, a small group of customers
accounted for approximately 30% of the revenues for our drilling and completion
fluids operations. The loss of any one or more of these customers could have a
material adverse effect upon our drilling and completion fluids operations.

As of December 31, 2000, we were providing drilling and completion fluids,
and related services for a total of 102 wells. Three of the wells were being
drilled by affiliated parties.

BARITE GRINDING FACILITY. We own and operate a barite grinding facility,
equipped with two barite grinding mills, located in Houma, Louisiana. Having the
ability to process our own barite is critical to being competitive on the Gulf
Coast and in the Gulf of Mexico since barite routinely accounts for a
substantial portion of the dollar volume for drilling fluids jobs in both of
these areas. These mills allow us to grind raw barite into the powder additive
used in producing drilling fluids. Owning these mills reduces our production
costs and our dependence upon third parties in our supply of barite. Without the
grinding mills we would be required to purchase processed barite from third
parties, including some of our competitors, which would likely result in higher
costs.

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COMPETITION

CONTRACT DRILLING OPERATIONS. The contract drilling industry is highly
competitive. Price is generally the most important competitive factor in the
drilling industry. Other competitive factors include the availability of
drilling equipment and experienced personnel at or near the time and place
required by customers, the reputation of the drilling contractor in the drilling
industry and our relationship with existing customers. We believe that we
compete favorably with respect to all of these factors. Competition is usually
on a regional basis, although drilling rigs are mobile and can be moved from one
region to another in response to increased demand. An oversupply of drilling
rigs in any region may result. Demand for land drilling equipment is also
dependent on the exploration and development programs of oil and natural gas
companies, which are in turn influenced primarily by:

- financial condition of such companies,

- general economic conditions,

- prices of oil and natural gas, and

- domestic and foreign political considerations and policies.

It is impracticable to estimate the number of contract drilling
competitors. Some of our competitors have substantially greater resources and
longer operating histories than we have. Also, in recent years, many drilling
companies have consolidated or merged with other companies. Although this
consolidation has decreased the total number of competitors, we believe that
competition for drilling contracts will continue to be intense.

OIL AND NATURAL GAS OPERATIONS. There is substantial competition for the
acquisition of oil and natural gas leases suitable for exploration and for the
hiring of experienced personnel. Our competitors in oil and natural gas
operations include:

- major integrated oil and natural gas companies,

- numerous independent oil and natural gas companies,

- drilling and production purchase programs, and

- individual producers and operators.

Our ability to increase our holdings of oil and natural gas reserves in the
future is directly dependent upon our ability to select, acquire and develop
suitable prospects in competition with these companies. Many competitors in this
business segment have financial resources, staffs, facilities and other
resources significantly greater than ours.

DRILLING AND COMPLETION FLUIDS OPERATIONS. The drilling and completion
fluids services industry is highly competitive. Price is generally the most
important competitive factor in the industry. Other competitive factors include
the availability of chemicals and experienced personnel, the reputation of the
fluids services provider in the drilling industry and our relationship with
existing customers.

Demand for drilling and completion fluids is also dependent on the
exploration and development programs of oil and natural gas companies, which are
in turn influenced primarily by the financial condition of such companies, by:

- general economic conditions,

- prices of oil and natural gas, and

- domestic and foreign political considerations and policies.

It is impracticable to estimate the number of our drilling and completion fluids
competitors. Some of our competitors have substantially greater resources and
longer operating histories than we have. We believe that competition for
drilling contracts will continue to be intense.

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GOVERNMENT AND ENVIRONMENTAL REGULATION

The domestic drilling of oil and natural gas wells is subject to numerous
state and federal laws, rules and regulations. State statutory provisions
relating to the drilling of oil and natural gas wells generally include
requirements as to:

- well spacing,

- waste prevention,

- production limitations,

- disposal of produced waters,

- pollution prevention and clean-up,

- obtaining drilling permits, and

- similar matters.

Within the state of Texas, where substantially all of our operations are
currently conducted, these regulations principally are enforced by the Texas
Railroad Commission. To date, we have not been required to expend significant
resources in order to satisfy applicable environmental laws and regulations.

We do not anticipate any material capital expenditures for environmental
control facilities or extraordinary expenditures associated with compliance with
environmental rules and regulations in the foreseeable future. However,
compliance costs under existing laws or under any new requirements could become
material and we could incur liability for noncompliance. Patterson has not been
fined or incurred liability for noncompliance, pollution or other environmental
damage in connection with its operations. We are not currently aware of any
environmental hazards which would materially affect our operations.

The contract drilling industry is dependent on demand for services from the
oil and natural gas exploration industry. Accordingly, the industry is affected
by:

- changing tax laws,

- price controls, and

- other laws generally related to the energy business.

Our business is affected generally by political developments and by
federal, state, foreign and local laws and regulations, which relate to the oil
and natural gas industry. The adoption of laws and regulations affecting the oil
and natural gas industry for economic, environmental and other policy reasons
could increase costs relating to drilling and production. They could have an
adverse effect on our operations. Several state and federal environmental laws
and regulations currently apply to our operations and may become more stringent
in the future.

We have utilized operating and disposal practices that were or are
currently standard in the industry. However, hydrocarbons and other materials
may have been disposed of or released in or under properties currently or
formerly owned or operated by us or our predecessors in interest. In addition,
some of these properties have been operated by third parties over whom we have
no control either as to such entities' treatment of hydrocarbon and other
materials or the manner in which such materials may have been disposed of or
released.

The federal Comprehensive Environmental Response Compensation and Liability
Act of 1980, commonly known as CERCLA, and comparable state statutes impose
strict liability on:

- owners and operators of sites, and

- persons who disposed of or arranged for the disposal of "hazardous
substances" found at sites.

The federal Resource Conservation and Recovery Act and comparable state
statutes govern the disposal of "hazardous wastes." Although CERCLA currently
excludes petroleum from the definition of "hazardous
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17

substances," and the Resource Conservation and Recovery Act also excludes
certain classes of exploration and production wastes from regulation, such
exemptions by Congress under both CERCLA and the Resource Conservation and
Recovery Act may be deleted, limited or modified in the future. If such changes
are made to CERCLA and/or the Resource Conservation and Recovery Act, we could
be required to remove and remediate previously disposed of materials (including
materials disposed of or released by prior owners or operators) from properties
(including ground water contaminated with hydrocarbons) and to perform removal
or remedial actions to prevent future contamination.

The Federal Water Pollution Control Act and the Oil Pollution Act of 1990
and implementing regulations govern:

- the prevention of discharges, including oil and produced water spills,
and

- liability for drainage into waters.

The Oil Pollution Act is more comprehensive and stringent than previous oil
pollution liability and prevention laws. It imposes strict liability for a
comprehensive and expansive list of damages from an oil spill into waters from
facilities. Liability may be imposed for oil removal costs and a variety of
public and private damages. Penalties may also be imposed for violation of
federal safety, construction and operating regulations, and for failure to
report a spill or to cooperate fully in a clean-up.

The Oil Pollution Act also expands the authority and capability of the
federal government to direct and manage oil spill clean-up and operations, and
requires operators to prepare oil spill response plans in cases where it can
reasonably be expected that substantial harm will be done to the environment by
discharges on or into navigable waters. We have spill prevention control and
countermeasure plans in place for our oil and natural gas properties in each of
the areas in which we operate and for each of the stockpoints operated by our
drilling and completion fluids business. Failure to comply with ongoing
requirements or inadequate cooperation during a spill event may subject a
responsible party to civil or criminal actions. Although the liability for
owners and operators is the same under the Federal Water Pollution Act, the
damages recoverable under the Oil Pollution Act are potentially much greater and
can include natural resource damages.

Our operations are also subject to federal, state and local regulations for
the control of air emissions. The federal Clean Air Act and various state and
local laws impose certain air quality requirements on Patterson. Amendments to
the Clean Air Act revised the definition of "major source" such that emissions
from both wellhead and associated equipment involved in oil and natural gas
production may be added to determine if a source is a "major source." As a
consequence, more facilities may become major sources and thus would be required
to obtain operating permits. This permitting process may require capital
expenditures in order to comply with permit limits.

RISKS AND INSURANCE

Our operations are subject to the many hazards inherent in the drilling
business, including:

- blow-outs,

- cratering,

- fires, and

- explosions.

These hazards could cause:

- personal injury or death,

- suspension of drilling operations, or

- serious damage or destruction of the equipment involved and, in addition
to environmental damage, could cause substantial damage to producing
formations and surrounding areas.

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Damage to the environment, including property contamination in the form of
either soil or ground water contamination, could also result from our
operations, particularly through:

- oil or produced water spillage,

- natural gas leaks, and

- extensive, uncontrolled fires.

In addition, we could become subject to liability for reservoir damages. The
occurrence of a significant event, including pollution or environmental damages,
could materially affect our operations and financial condition.

As a protection against operating hazards, we maintain insurance coverage
we consider to be adequate, including:

- all-risk physical damages,

- employer's liability,

- commercial general liability, and

- workers compensation insurance.

Patterson currently has:

- general liability insurance of $2.0 million per occurrence with an
aggregate of $2.0 million, and

- excess liability and umbrella coverage of up to $40.0 million per
occurrence with a $40.0 million aggregate.

Our customers generally require us to have at least $1.0 million of third party
liability coverage. Since April 1, 1992, we have carried workers' compensation
insurance, with a deductible of $100,000 per occurrence. If multiple workers'
compensation claims are filed, we could incur significant expenses, which in
turn could have a material adverse impact on our financial condition and
operations.

We believe that we are adequately insured for public liability and property
damage to others with respect to our operations. However, such insurance may not
be sufficient to protect us against liability for all consequences of:

- well disasters,

- extensive fire damage, or

- damage to the environment.

We also carry insurance to cover physical damage to or loss of our drilling
rigs. However, we do not carry insurance against loss of earnings resulting from
such damage or loss. In view of the difficulties that may be encountered in
renewing such insurance at reasonable rates, no assurance can be given that:

- we will be able to maintain the type and amount of coverage that we
consider adequate at reasonable rates, or

- any particular types of coverage will be available.

EMPLOYEES

We employed approximately 3,062 full-time persons (132 office personnel and
2,930 field personnel) at December 31, 2000. The number of drilling rig
employees will fluctuate depending upon our number of marketable drilling rigs
and the demand for contract drilling services. We consider our employee
relations to be satisfactory. None of our employees is represented by a union.

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CORPORATE HEADQUARTERS, FIELD OFFICES AND OTHER FACILITIES

Our corporate headquarters are located in Snyder, Texas. We have a number
of small offices and yard and stockpoint facilities located in our various
operating areas.

Our corporate headquarters are located at 4510 Lamesa Highway, Snyder,
Texas, and our telephone number at that address is (915) 573-1104. There are a
number of improvements at our headquarters, including:

- an executive office building with approximately 16,000 square feet,

- a main shop facility with approximately 7,000 square feet used for
drilling equipment repairs and metal fabrication,

- an engine shop facility with approximately 5,000 square feet used to
completely overhaul and repair the engines used to power our drilling
rigs, and

- an open-ended metal storage facility with approximately 10,200 square
feet.

We also have small offices in:

- Austin,

- Houston,

- Midland,

- San Angelo,

- Corpus Christi,

- LaGrange, and

- Kilgore, Texas;

- Hobbs, New Mexico,

- Vernal, Utah,

- Oklahoma City, Oklahoma,

- Lafayette, Louisiana, and

- approximately 26 yard and stockpoint facilities variously located in our
areas of operations.

We own our headquarters in Snyder and both lease and own our outlying
offices and yard facilities. We do not believe that any of these outlying
offices and yard facilities are material to our operations. We lease stockpoint
facilities which are considered material to our drilling and completion fluids
operations. We believe that our existing facilities are suitable and adequate to
most of our needs.

ITEM 3. LEGAL PROCEEDINGS.

We are party to various legal proceedings arising in the normal course of
our business. We do not believe that the outcome of these proceedings will have
a material adverse effect on our financial condition.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

None.

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CAUTIONARY STATEMENT FOR PURPOSES OF THE "SAFE HARBOR"
PROVISIONS OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

We include the following cautionary statement to take advantage of the
"safe harbor" provisions of the Private Securities Litigation Reform Act of 1995
for any forward-looking statement made by us, or on our behalf. The factors
identified in this cautionary statement are important factors (but not
necessarily all of the important factors) that could cause actual results to
differ materially from those expressed in any forward-looking statement made by
us, or on our behalf. Where any such forward-looking statement includes a
statement of the assumptions or bases underlying such forward-looking statement,
we caution that, while we believe such assumptions or bases to be reasonable and
make them in good faith, assumed facts or bases almost always vary from actual
results. The differences between assumed facts or bases and actual results can
be material, depending upon the circumstances.

Where, in any forward-looking statement, Patterson, or our management,
expresses an expectation or belief as to the future results, such expectation or
belief is expressed in good faith and believed to have a reasonable basis.
However, there can be no assurance that the statement of expectation or belief
will result, or be achieved or accomplished. Taking this into account, the
following are identified as important risk factors that could cause actual
results to differ materially from those expressed in any forward-looking
statement made by, or on behalf of, Patterson:

RISKS RELATED TO PATTERSON'S BUSINESS GENERALLY

PATTERSON IS DEPENDENT ON THE OIL AND NATURAL GAS INDUSTRY AND MARKET PRICES FOR
OIL AND NATURAL GAS. DECLINES IN OIL AND NATURAL GAS PRICES COULD ADVERSELY
AFFECTED OUR OPERATIONS.

Our revenue, profitability and rate of growth are substantially dependent
upon prevailing prices for oil and natural gas. In recent years, oil and natural
gas prices and, therefore, the level of drilling, exploration, development and
production, have been extremely volatile. Prices are affected by:

- market supply and demand,

- international military, political and economic conditions, and

- the ability of the Organization of Petroleum Exporting Countries,
commonly known as OPEC, to set and maintain production and prices.

All of these factors are beyond our control. Low level commodity prices
beginning in the fourth quarter of 1997 and continuing into mid-1999 materially
adversely affected our operations. We expect oil and natural gas prices to
continue to be volatile and to effect our financial condition and operations and
ability to access sources of capital.

INDUSTRY CONDITIONS FOR CONTRACT DRILLING SERVICES HAVE BEEN POOR FOR MUCH OF
THE TIME SINCE 1982.

The contract drilling business experienced increased demand for drilling
services from 1995 through most of 1997 due to stronger oil and natural gas
prices. The increase in demand returned beginning in mid-1999 and has continued
through 2000. However, except for those periods and other occasional upturns,
the market for onshore contract drilling services has generally been depressed
since 1982, when the number of operable land drilling rigs was at record levels.
Since this time and except during the occasional upturns, there have been
substantially more drilling rigs available than necessary to meet demand in most
operational and geographic segments of the domestic drilling industry. As a
result, drilling contractors have had difficulty sustaining profit margins.

In addition to adverse effects that future declines in demand could have on
Patterson, ongoing factors which could adversely affect utilization rates and
pricing, even in an environment of stronger oil and natural gas prices and
increased drilling activity, include:

- movement of drilling rigs from region to region,

- reactivation of land-based drilling rigs, or

- new construction of drilling rigs.

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We cannot predict either the future level of demand for our contract drilling
services or future conditions in the oil and natural gas contract drilling
business.

SHORTAGES OF DRILL PIPE AND OTHER DRILLING EQUIPMENT OPERATIONS.

The increase since mid-1999 in domestic drilling demand and the related
increase in contract drilling activity has resulted in a shortage of drill pipe
and rig parts in the industry. This shortage has caused the price of these items
to increase significantly and has required that orders for the items be placed
well in advance of expected use. These price increases and delays in delivery
have caused us to substantially increase capital expenditures in our contract
drilling segment. Severe shortages could impair our ability to obtain the
equipment required for contract drilling operations.

THE VARIOUS BUSINESS SEGMENTS IN WHICH WE OPERATE ARE HIGHLY COMPETITIVE.

CONTRACT DRILLING BUSINESS. The inability to compete effectively in the
contract drilling industry would adversely impact our overall operations. Price
is generally the most important competitive factor. Other competitive factors
include:

- the availability of drilling equipment and experienced personnel at or
near the time and place required by customers,

- the reputation of the drilling contractor, and

- the drilling contractors' relationship with existing customers.

Competition is usually on a regional basis, although drilling rigs are mobile
and can be moved from one region to another in response to increased demand. An
oversupply of drilling rigs in any region may result.

Demand for land drilling equipment is also dependent on the exploration and
development budgets of oil and natural gas companies. These budgets are in turn
influenced primarily by:

- the financial condition of such companies,

- general economic conditions,

- prices of oil and natural gas, and

- political considerations and policies.

It is not practical to estimate the number of our contract drilling competitors.
Also, in recent years, many drilling companies have consolidated or merged with
other companies. Although this consolidation has decreased the total number of
competitors, we believe the competition for drilling services will continue to
be intense.

OIL AND NATURAL GAS EXPLORATION AND PRODUCTION BUSINESS. There is also
substantial competition for the acquisition of oil and natural gas leases
suitable for exploration and for the hiring of experienced personnel. Our
competitors in the exploration, development and production industry include:

- major integrated oil and natural gas companies,

- numerous independent oil and natural gas companies,

- drilling and production purchase programs, and

- individual producers and operators.

Our ability to increase our holdings of oil and natural gas reserves in the
future is directly dependent upon our ability to select, acquire and develop
suitable prospects in competition with those companies. Many competitors have
financial resources, staff, facilities and other resources significantly greater
than those of Patterson.

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DRILLING AND COMPLETION FLUIDS BUSINESS. The drilling and completion
fluids services industry is highly competitive. Price is generally the most
important competitive factor in the industry. Other competitive factors include
the availability of chemicals and experienced personnel, the reputation of the
fluids services provider in the drilling industry and our relationship with
existing customers.

Demand for drilling and completion fluids is also dependent on the
exploration and development programs of oil and natural gas companies, which are
in turn influenced primarily by the financial condition of such companies, by:

- general economic conditions,

- prices of oil and natural gas, and

- political considerations and policies.

It is impracticable to estimate the number of our drilling and completion fluids
competitors. Some of our competitors have substantially greater resources and
longer operating histories than we have. We believe that competition for
drilling contracts will continue to be intense for the foreseeable future.

LABOR SHORTAGES ARE ADVERSELY AFFECTING OUR DRILLING OPERATIONS.

The increased demand for domestic contract drilling services has caused a
shortage of qualified drilling rig personnel in the industry. This increase
adversely affects our ability to attract and retain sufficient qualified
personnel to market and operate our drilling rigs. These labor shortages have
also caused wage increases, which impact our operating margins.

PATTERSON HAS BORROWINGS; FAILURE TO REPAY COULD RESULT IN FORECLOSURE ON
DRILLING RIGS.

Patterson has a $70 million credit facility with an outstanding principal
balance of $24.0 million at February 27, 2001. All of our drilling rigs and
related drilling equipment are pledged as collateral on the facility. The loan
was payable in monthly payments of interest only until February 2001, at which
time the loan converted to a term loan with a 60-month, level principal
amortization. A decline in general economic conditions in the oil and natural
gas industry could adversely affect our ability to repay the loan. Failure to
repay could, at the lender's election, result in acceleration of the maturity
date of the loan and foreclosure on the drilling assets. Additionally, the loan
agreement contains a number of covenants, including financial covenants, the
failure of which to satisfy could also cause acceleration of the maturity date
and require immediate repayment. The first principal payment of $406,972 was
made in February 2001.

CONTINUED GROWTH THROUGH RIG ACQUISITION IS NOT ASSURED.

We have increased our drilling rig fleet over the past several years
through strategic acquisitions. In February 2001, we entered into a merger
agreement with UTI Energy Corp. which, if closed, would double the number of our
drilling rigs. Although the land drilling industry has experienced significant
consolidation over the past couple of years, we believe that acquisition
opportunities are still available. However, we are likely to continue to face
intense competition from other companies for available acquisition
opportunities.

There can be no assurance that:

- we would have sufficient capital resources to complete additional
acquisitions,

- acquisitions could be completed on terms acceptable to us, or

- any completed acquisition would improve our financial condition, results
of operation, business or prospects in any material manner.

We may incur substantial indebtedness to finance future acquisitions and also
may issue equity securities or convertible securities in connection with any
such acquisitions. Additional debt service requirements could represent a
significant burden on our results of operations and financial condition and the
issuance of

22
23

additional equity could be dilutive to our existing stockholders. Also,
continued growth could strain our management, operations, employees and
resources.

OUR OPERATIONS ARE SUBJECT TO OPERATING HAZARDS AND UNINSURED RISKS.

Our business operations are subject to a number of risks and hazards. These
activities could cause:

- serious injury or death to persons,

- suspension of drilling operations,

- serious damage to equipment or property of others, and

- damage to producing oil and natural gas formations in adjoining areas.

Our operations could also cause environmental damage, particularly through:

- oil spills,

- gas leaks,

- discharges of toxic gasses, or

- extensive uncontrolled fires.

In addition, we could become subject to liability for oil and natural gas
reservoir damage. The occurrence of a significant event, including pollution or
environmental damage, could materially affect our operations and financial
condition.

Our insurance and contractual indemnification agreements from customers may
not be adequate to protect us against liability from all consequences of:

- well disasters,

- extensive fire damage, or

- damage to the environment.

There is no assurance that we will be able to maintain adequate insurance
in the future at rates we consider reasonable or that any particular type of
coverage will be available. We generally have been able to obtain some degree of
contractual indemnification from our customers in most of our day rate drilling
contracts against pollution and environmental damages. However, there is no
assurance that:

- we would be able to enforce the indemnification,

- the customer will be financially able in all cases to comply with its
indemnity obligations, or

- we will be able to obtain these indemnification agreements in the future.

No indemnification is typically available for turnkey contracts. While we also
maintain insurance coverage against certain environmental liabilities, including
pollution caused by sudden and accidental oil spills, we cannot assure that we
will continue to be able to secure or carry this insurance, or, if we were able
to do so, that the coverage would be adequate to cover the liabilities.

VIOLATIONS OF ENVIRONMENTAL LAWS AND REGULATIONS COULD MATERIALLY ADVERSELY
AFFECT OUR OPERATIONS.

Our operations are subject to numerous domestic laws and regulations that
relate directly or indirectly to the drilling of oil and natural gas wells,
including laws and regulations:

- controlling the discharge of materials into the environment,

- requiring removal and clean-up under certain circumstances, or otherwise,
and

- relating to the protection of the environment.

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24

Laws and regulations protecting the environment have generally become more
stringent in recent years. They may in certain circumstances impose strict
liability, rendering a person liable for environmental damage without regard to
negligence or to the fault on the part of such person. Such laws and regulations
may expose us to liability for the conduct of, or conditions caused by, others,
or for our acts that were in compliance with all applicable laws at the time
such acts were performed.

SOME OF OUR CONTRACT DRILLING SERVICES ARE DONE UNDER TURNKEY CONTRACTS, WHICH
ARE FINANCIALLY RISKY.

A portion of our contract drilling is done under turnkey contracts, which
involve substantial risks. Under turnkey drilling contracts, we contract to
drill a well to a certain depth under specified conditions for a fixed price.
The risks to us under these types of drilling contracts are substantially
greater than on a well drilled on a daywork basis. This is due to the assumption
by us in turnkey contracts of most of the risks associated with the drilling
operations generally assumed by the operator of the well in a daywork contract,
including:

- risk of blowout,

- machinery breakdowns, and

- abnormal drilling conditions.

Accordingly, if severe drilling problems are encountered in drilling wells under
a turnkey contract, we could suffer substantial losses associated with that
contract. Generally, the weaker the demand for our drilling services, the higher
the percentage of our turnkey contracts. For each of the years in the three-year
period ended December 31, 2000, the percentage of our contract drilling revenues
attributable to turnkey contracts was 12%, 20.0% and 8.0%, respectively.

ESTIMATES OF OUR OIL AND NATURAL GAS RESERVES ARE UNCERTAIN.

Estimates of our proved developed reserves and future net revenues are
based on engineering reports prepared by an independent petroleum engineer.
These reports are based upon a review of production of histories and other
geologic, economic, ownership and engineering data provided by Patterson. These
estimates are based on several assumptions that the SEC requires oil and natural
gas companies to use, including, for example, constant oil and natural gas
prices. The estimates are inherently imprecise indications of future net
revenues. Actual future production, revenues, taxes, production costs and
development costs may vary substantially from those assumed in the estimates.
Any significant variance could materially affect the estimates. In addition, our
reserves might be subject to upward or downward adjustment based on:

- future production,

- results of future exploration and development,

- prevailing oil and natural gas prices, and

- other factors.

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25

RISKS RELATED TO PATTERSON'S OPERATIONS

THE LOSS OF SERVICES OF KEY OFFICERS COULD HURT OUR OPERATIONS.

We are highly dependent on our executive officers and key employees. The
unexpected loss of the services of any of these individuals, particularly Cloyce
A. Talbott or A. Glenn Patterson, Chief Executive Officer and President,
respectively, could have a detrimental affect on Patterson. We have no
employment agreements with any of our executive officers. We maintain key man
life insurance on the lives of Messrs. Talbott and Patterson in the amount of $3
million each.

ANTI-TAKEOVER MEASURES IN OUR CHARTER DOCUMENTS AND UNDER STATE LAW COULD
DISCOURAGE AN ACQUISITION OF PATTERSON AND THEREBY AFFECT THE RELATED PURCHASE
PRICE.

Patterson, as a Delaware corporation, is subject to the Delaware General
Corporation Law, including Section 203, an anti-takeover law enacted in 1988. We
have also enacted certain anti-takeover measures, including a stockholders
rights plan. In addition, our board of directors has the authority to issue up
to one million shares of preferred stock and to determine the price, rights
(including voting rights), conversion ratios, preferences and privileges of that
stock without further vote or action by the holders of the common stock. As a
result of these measures and others, potential acquirers of Patterson may find
it more difficult or be discouraged from attempting to effect an acquisition
transaction with us. This may deprive holders of our securities of certain
opportunities to sell or otherwise dispose of the securities at above-market
prices pursuant to any such transactions.

WE HAVE PAID NO DIVIDENDS ON OUR COMMON STOCK AND HAVE NO PLANS TO PAY DIVIDENDS
IN THE FORESEEABLE FUTURE.

We have not declared or paid cash dividends on our common shares in the
past. We do not expect to declare or pay any cash dividends on our common stock
in the foreseeable future. The terms of our existing credit facility prohibit
payment of dividends by us without the prior written consent of the lenders.

PARTICIPATION BY PATTERSON DIRECTORS AND OFFICERS IN OIL AND NATURAL GAS
PROSPECTS COULD CREATE CONFLICTS OF INTEREST.

Certain of our directors and executive officers and their respective
affiliates have participated, from time to time, in oil and natural gas
prospects and properties in which we have interest. These participations may
continue in the future. Conflicts of interest may arise between such persons and
Patterson as to the advisability of conducting drilling and recompletion
activities on these properties. Of the 164 wells we operated at the end of year
2000, our directors, officers and/or their respective affiliates were working
interest owners in approximately 127 wells.

OUR BOARD MAY ISSUE PREFERRED STOCK WITH RIGHTS AND PREFERENCES ADVERSE TO
COMMON STOCK.

We have a class of authorized preferred stock. Our board of directors,
without stockholder approval, may issue shares of the preferred stock with
rights and preferences adverse to the voting power or other rights of the
holders of common stock. We have not issued any preferred shares. However, as of
December 31, 2000, an aggregate of 374,773 shares of our preferred stock had
been reserved for issuance upon exercise of the rights issued under our
stockholders rights plan.

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26

PART II

ITEM 5. MARKET FOR OUR COMMON SHARES AND RELATED STOCKHOLDER MATTERS.

Our common stock, par value $0.01 per share is publicly traded on the
Nasdaq National Market and is quoted under the symbol "PTEN."

The following table sets forth the high and low sales prices of our common
shares for the periods indicated:

<TABLE>
<CAPTION>
HIGH LOW
---- ---
<S> <C> <C>
1999:
First quarter............................................... $ 6.06 $ 2.75
Second quarter.............................................. 10.81 4.38
Third quarter............................................... 16.31 8.38
Fourth quarter.............................................. 15.94 10.00

2000:
First quarter............................................... $ 31.88 $ 11.63
Second quarter.............................................. 32.25 19.63
Third quarter............................................... 35.94 21.44
Fourth quarter.............................................. 39.50 22.50
</TABLE>

As of February 20, 2001, there were approximately 332 holders of record
(approximately 8,357 beneficial holders) of our common shares.

We have not declared or paid cash dividends on our common shares in the
past and do not expect to declare or pay any cash dividends on our common stock
in the foreseeable future. Instead, we intend to retain our earnings to support
the operations and growth of our business. Any future cash dividends would
depend on future earnings, capital requirements, financial condition and other
factors deemed relevant by the board of directors. In addition, the terms of our
existing credit facility prohibit payment of dividends without the prior written
consent of the lenders.

During 2000, we issued a total of 1,203,000 common shares and three-year
warrants to acquire 127,000 common shares that were not registered under the
Securities Act of 1933, as amended. The shares were issued in two separate
transactions as follows:

- During March 2000, we issued a total of 53,000 common shares valued at
$29.0625 per share as partial consideration for the acquisition of four
drilling rigs and related equipment from an unrelated entity.

- The remaining 1,150,000 common shares and the warrants to acquire 127,000
common shares we issued as consideration for the acquisition of eight
drilling rigs and related equipment acquired during June 2000 from an
unrelated entity. The common shares were valued at $18.00 per share, the
market price of the shares on the date of the transaction. The warrants
were valued at $900,000 using a Black-Scholes model.

Each of the shares and warrant shares, subsequent to their respective
issuances, have been registered for resale with the SEC.

No underwriter was involved in either of the transactions and no sales
commissions, fees or similar compensation were paid to any person in connection
with the issuance of the shares. We believe that the issuance of the shares in
each instance was exempt from the registration requirements of Section 5 of the
Securities Act by virtue of Section 4(2) of the Securities Act and/or under Rule
506 of Regulation D promulgated by the SEC thereunder.

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ITEM 6. SELECTED FINANCIAL DATA.

The selected consolidated financial data of Patterson as of December 31,
1996, 1997, 1998, 1999 and 2000 and for each of the five years then ended should
be read in conjunction with "Management's Discussion and Analysis of Financial
Condition and Results of Operations" and the Consolidated Financial Statements
and related Notes thereto, included as Items 7 and 8, respectively, of this
document.

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
-------------------------------------------------------------
1996 1997 1998 1999 2000
---- ---- ---- ---- ----
(IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
(UNAUDITED)
<S> <C> <C> <C> <C> <C>
INCOME STATEMENT DATA:
Operating revenues:
Drilling..................... $ 73,590 $ 178,332 $ 165,997 $ 131,287 $ 260,233
Oil and natural gas.......... 10,118 12,445 7,170 8,563 15,615
Drilling completion fluids... -- -- 13,397 11,686 32,053
--------- ---------- ---------- ---------- ----------
Total................ 83,708 190,777 186,564 151,536 307,901
--------- ---------- ---------- ---------- ----------
Operating costs and expenses:
Drilling..................... 59,564 128,416 128,838 113,569 190,234
Oil and natural gas.......... 3,465 4,402 3,676 2,500 4,872
Drilling and completion
fluids.................... -- -- 10,205 9,864 26,545
Impairment of proved oil and
natural gas properties.... 549 355 3,816 275 --
Depreciation, depletion and
amortization.............. 9,960 17,497 28,091 28,156 33,133
General and administrative... 5,416 6,786 9,313 7,299 11,394
--------- ---------- ---------- ---------- ----------
Total................ 78,954 157,456 183,939 161,663 266,178
--------- ---------- ---------- ---------- ----------
Operating income (loss)........ 4,754 33,321 2,625 (10,127) 41,723
--------- ---------- ---------- ---------- ----------
Other income (expense)......... (2,737) 1,787 (2,857) (3,341) (3,724)
--------- ---------- ---------- ---------- ----------
Income (loss) before income
taxes........................ 2,017 35,108 (232) (13,468) 37,999
Income tax expense (benefit)... (2,254) 12,866 93 (4,341) 14,244
--------- ---------- ---------- ---------- ----------
Net income (loss).............. $ 4,271 $ 22,242 $ (325) $ (9,127) $ 23,755
========= ========== ========== ========== ==========
Net income (loss) per common
share:
Basic........................ $ 0.22 $ 0.78 $ ( 0.01) $ ( 0.28) $ 0.69
========= ========== ========== ========== ==========
Diluted...................... $ 0.21 $ 0.75 $ ( 0.01) $ ( 0.28) $ 0.66
========= ========== ========== ========== ==========
Weighted average number of
common shares outstanding:
Basic........................ 19,167 28,492 31,645 32,499 34,347
========= ========== ========== ========== ==========
Diluted...................... 20,086 29,505 31,645 32,499 35,753
========= ========== ========== ========== ==========
BALANCE SHEET DATA:
Total assets................... $ 87,913 $ 203,200 $ 236,605 $ 236,257 $ 410,586
Notes payable.................. 25,849 23,250 55,714 50,000 24,416
Stockholders' equity........... 43,482 146,932 156,852 152,788 302,806
</TABLE>

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ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS.

This Item 7 contains forward-looking statements, which are made pursuant to
the "safe harbor" provisions of the Private Securities Litigation Reform Act of
1995. These statements include, without limitation, statements relating to:

- liquidity,

- financing of operations,

- continued volatility of oil and natural gas prices,

- source and sufficiency of funds required for capital needs and additional
rig acquisitions (if further opportunities arise),

- future utilization of net operating loss carryforwards,

- impact of inflation on our financial position and on our earnings per
share, and

- other such matters.

The words "believes," "budgeted," "expects" or "estimates" and similar
expressions identify forward-looking statements. We do not undertake to update,
revise or correct any of the forward-looking information. Readers are cautioned
that such forward-looking statements should be read in conjunction with our
disclosures under the heading: "Cautionary Statement for Purposes of the 'Safe
Harbor' Provisions of the Private Securities Litigation Reform Act of 1995"
beginning on page 20.

LIQUIDITY AND CAPITAL RESOURCES

As of December 31, 2000, we had working capital of approximately $110.9
million including cash and cash equivalents of approximately $59.4 million as
compared to working capital of approximately $27.0 million including cash and
cash equivalents of approximately $8.8 million as of December 31, 1999. For the
twelve months ended December 31, 2000, our various sources of cash flow were:

- $49.1 million derived from operations,

- $98.8 million generated from the public offering of 3,000,000 shares of
our common stock,

- $3.2 million from the exercise of stock options and warrants,

- $14.4 million of proceeds provided by our credit facility with
Transamerica Equipment Financial Services Corporation,

- $1.1 million from the sale of certain property and equipment, and

- $630,000 from other non-operating activities.

Correspondingly, a portion of the funds, as discussed above, were used by
us during the year as follows:

- $40.0 million to repay, prior to its respective maturity, long-term
indebtedness then outstanding with Transamerica,

- $17.8 million as partial consideration in the acquisitions of WEK
Drilling Co., Inc. and certain assets of Ambar, Inc.,

- $57.2 million to make necessary repair and maintenance expenditures for
the betterment and refurbishment of both the marketable and non-operable
drilling rigs, as well as the acquisition and procurement of drilling
equipment, including drill pipe, to fund leasehold acquisition,
exploration and development of oil and natural gas properties and to fund
capital expenditures for our drilling and completion fluids segment, and

- $1.65 million to repurchase 300,000 shares of our own common stock
originally issued in the acquisition of the assets of Padre Industries,
Inc.

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29

During 2000, we entered into three separate transactions whereby we
increased our land-based drilling rig fleet to 131, an increase of 12 rigs from
a year ago, and we further expanded our drilling fluids operations with the
addition of drilling and completion fluids operations in Louisiana, the Gulf
Coast areas of South Texas and the Gulf of Mexico. During January 2001, we added
an additional 21 drilling rigs (of which 14 were marketable) to our total rig
fleet. A brief description of each the transactions follows:

- On March 31, 2000, we acquired 100% of the outstanding stock of WEK
Drilling Company, Inc., a privately held, non-affiliated drilling company
with its principal operations in Southeast New Mexico, for an aggregate
purchase price of $6.8 million. The acquired assets included four
operable contract drilling rigs and other related equipment and working
capital of approximately $1.2 million. Three of the rigs have depth
capacities greater than 12,000 feet with the other rig having a depth
rating of 10,500 feet. We funded the acquisition using $5.66 million of
proceeds from our credit facility with Transamerica and 53,000 shares of
our common stock valued at $29.0625 per share. Certain assets, unrelated
to the contract drilling business, were sold back to one of the previous
owners for a cash payment of $1.0 million.

- On June 2, 2000, we consummated the acquisition of High Valley Drilling,
Inc. The assets consisted of eight non-operable drilling rigs and other
related equipment. The drilling rigs, when completely refurbished, will
have depth capacities equal to or exceeding 15,000 feet with three of the
rigs having a depth rating of 25,000 feet. Consideration for the
acquisition included 1,150,000 restricted shares of our common stock and
three-year warrants to acquire an additional 127,000 shares at an
exercise price of $22.00 per share. The common stock issued in connection
with the acquisition was recorded at $18.00 per share which represents
the market price of the stock on the day the acquisition was announced
and the warrants were valued at $900,000. During 2000, we expended
approximately $11.5 million refurbishing the High Valley rigs. Four of
the rigs were placed into operation by the end of December 2000 with two
additional rigs placed into service during February 2001. We anticipate
the remaining rigs to be placed into service by the end of June 2001 with
further capital expenditures not to exceed $2.5 million per rig,
including drill pipe.

- On October 3, 2000, we completed the acquisition of the drilling and
completion fluids division of Ambar, Inc., a non-affiliated entity with
its principal operations in the Louisiana and Texas Gulf Coasts and the
Gulf of Mexico. We acquired working capital of approximately $7.8 million
(current assets of $18.2 million and current liabilities of $10.4
million), fixed assets with a fair market value of $15.7 million and
other trademarks and intellectual property specific to the division's
operations. Cash of $12.4 million was paid as consideration for the
purchase which included $680,000 of direct costs incurred related to the
transaction.

- On January 5, 2001, we completed the acquisition of Jones Drilling
Corporation and the assets of three related entities, Henderson Welding,
Inc., L.E.J. Truck and Crane, Inc., and L.E. Jones Drilling Company. All
four companies were based in Duncan, Oklahoma. The assets acquired as a
part of these transactions consisted of 21 contract drilling rigs (14 of
which were marketable), a fleet of rig moving trucks, drilling facilities
and shops and equipment yards located in Duncan, Oklahoma, and
Bridgeport, Texas. The drilling rigs range from 450 to 1,000 horsepower
with 12 rigs having a drilling capacity of 12,000 feet and greater, with
four of those rigs capable of drilling to depths greater than 15,000
feet. The purchase price consisted of 810,070 shares of our common stock
valued at $26.8125 per share and $10.9 million cash, net of certain
working capital adjustments.

On September 14, 2000, we completed a public offering of 3 million shares
of our common stock at a public price of $34.50 per share. An underwriting
discount of $1.50 was paid, for a net price of $33.00 per share. Net proceeds
from the offering totaled approximately $98.8 million. Certain of the proceeds
were used to reduce, prior to maturity, outstanding indebtedness with
Transamerica from $64.4 million to $24.4 million, as well as a prepayment
penalty of $200,000. This penalty is included in interest expense at December
31, 2000, as we consider the amount immaterial for extraordinary treatment.

On July 20, 2000, we executed an amendment to our existing credit facility
with Transamerica, increasing the facility from $60.0 million to $70.0 million.
During 2000, we borrowed an additional $14.4 million under
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the facility, increasing our total outstanding indebtedness under the agreement
to $64.4 million. The terms of the facility provided that the credit facility
would convert to a term note during 2000 with a 60-month, level principal
amortization to begin in February 2001. As previously discussed, using net
proceeds from the public offering we prepaid $40.0 million on the outstanding
balance and have began principal amortization in February 2001 as required by
the underlying agreement.

We believe that the current level of cash and short-term investments,
together with cash generated from operations should be sufficient to meet our
immediate capital needs. From time to time, acquisition opportunities are
reviewed relating to our business. The timing, size or success of any
acquisition and the associated capital commitments are unpredictable. Should
further opportunities for growth requiring capital arise, we believe we would be
able to satisfy these needs through a combination of working capital, cash
generated from operations, and either debt or equity financing. However, there
can be no assurance that such capital would be available.

RESULTS OF OPERATIONS

COMPARISON OF THE YEARS ENDED DECEMBER 31, 2000 AND 1999

For the year ended December 31, 2000, contract drilling revenues were
$260.2 million as compared to $131.3 million for the same period in 1999, an
increase of approximately 98%. Average rig utilization was 74% on an average of
119 rigs available for service for the year ended December 31, 2000, as compared
to 45% on an average of 114 rigs available for service for the twelve months
ended December 31, 1999. Direct drilling costs were $190.2 million or 73% of
drilling revenues for the year ended December 31, 2000, while direct drilling
costs were $113.6 million or 87% of related drilling revenues for 1999. General
and administrative expense for the contract drilling operations was
approximately $5.3 million for the year ended December 31, 2000, as compared to
approximately $4.1 million in 1999. The increase in general and administrative
expense was largely attributable to an increase in administrative personnel
needed to support the increase in the number of rigs marketed during the year
and the increased utilization of our rig fleet. Depreciation and amortization
expense for the contract drilling segment increased from $24.4 million for the
year ended December 31, 1999, to approximately $28.0 million for the same
twelve-month period in 2000. For the twelve months ended December 31, 2000,
operating income from contract drilling operations was approximately $36.9
million as compared to an operating loss of approximately $10.3 million in 1999.
The increase in the contract drilling segment's operating results was reflective
of 12 additional rigs acquired during the year, increased pricing of our
contract services caused by significant improvements in commodity prices, and
the resulting 64% increase in our average rig utilization rate. Notwithstanding
the recent improvement in oil and natural gas prices, there can be no assurance
that the demand for contract drilling services will increase proportionally with
the current higher commodity prices or of the duration of the higher commodity
prices.

Oil and natural gas sales revenues were approximately $13.6 million for the
year ended December 31, 2000, as compared to approximately $6.8 million in 1999.
The volumes of oil and natural gas sold increased by approximately 20% in 2000,
as compared to fiscal year 1999. The average price per Bbl of crude oil received
in 2000 was $29.99, as compared to $18.08 in 1999, and the average price per Mcf
of natural gas was $3.87 in 2000, as compared to $2.22 in 1999. Lease operating
and production costs were $6.41 per BOE in 2000, compared to $4.08 per BOE in
1999. General and administrative expense for the oil and natural gas segment was
approximately $1.5 million and $1.2 million for the years ended December 31,
2000 and 1999, respectively. Exploration costs were approximately $663,000 and
$611,000 for the years ended December 31, 2000 and 1999, respectively.
Depreciation and depletion expense was approximately $3.6 million in 2000, as
compared to approximately $2.7 million in 1999. The increase in depreciation and
depletion expense was the result of increased production during 2000 due to
significantly improved commodity prices. We impaired certain of our oil and
natural gas properties by $275,000 during 1999. No impairment expense was
incurred in 2000. Other revenues generated by the oil and natural gas segment,
consisting primarily of fees generated from lease operating activities, were
approximately $2.0 million and $1.6 million for the years ended December 31,
2000 and 1999, respectively. For the year ended December 31, 2000, the oil and
natural gas segment generated income from operations of approximately $5.6
million as compared to income of approximately $1.9 million

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for the year ended December 31, 1999. The fluctuation in the segment's operating
results was primarily attributable to the increase in the underlying commodity
prices as discussed above.

Operating revenues from our drilling and completion fluid services were
approximately $32.1 million and $11.7 million for the twelve months ended
December 31, 2000 and 1999, respectively. Operating costs incurred by the
drilling and completion fluids segment were approximately $26.5 million in 2000
as compared to costs of approximately $9.9 million in 1999. For the twelve
months ended December 31, 2000, depreciation and amortization expense was $1.5
million as compared to approximately $1.1 million in 1999. General and
administrative expense for the drilling and completion fluids segment was
approximately $4.6 million and $2.0 million for the twelve months ended December
31, 2000 and 1999, respectively. The increases noted above on each of the items
discussed were primarily attributable to the addition of the fluids division of
Ambar, Inc. during October 2000. For the twelve months ended December 31, 2000,
the drilling fluids segment generated a net loss from operations of
approximately $550,000 as compared to a net operating loss of approximately $1.4
million for the comparative twelve month period in 1999. The improvement in
operations was consistent with the rise in the segment's operating revenues and
expenses and resulting increase in operating margin as discussed above and
reflective of the improvements in the industry's economic conditions.

For the year ended December 31, 2000, we incurred interest expense of
approximately $5.0 million as compared to $4.1 million in 1999 and earned
interest income of approximately $999,000 and $445,000 in 2000 and 1999,
respectively. In 2000, we recognized a net gain on the sale of property and
equipment of $194,000 as compared to approximately $129,000 in 1999.

COMPARISON OF THE YEARS ENDED DECEMBER 31, 1999 AND 1998

For the year ended December 31, 1999, contract drilling revenues were
approximately $131.3 million as compared to $166.0 million for the same period
in 1998; a decrease of approximately 21%. Average rig utilization was 45% on an
average of 114 rigs available for service for the year ended December 31, 1999
as compared to 54% on an average of 106 rigs available for service for the
twelve months ended December 31, 1998. Direct drilling costs were $113.6 million
or 87% of drilling revenues for the year ended December 31, 1999; while direct
drilling costs were $128.8 million or 78% of related drilling revenues for 1998.
General and administrative expense for the contract drilling operations was
approximately $4.1 million for the year ended December 31, 1999 as compared to
approximately $6.1 million in 1998. The decrease in general and administrative
expense was largely attributable to the our decision to close our administrative
offices in Dallas, Abilene and Wichita Falls, Texas.

Additionally, we imposed a company-wide compensation reduction and certain
layoffs during January and February 1999 in an effort to reduce overhead costs
in response to the significantly weakened economic conditions of the industry.
Depreciation and amortization expense for the contract drilling segment
increased from $22.4 million for the year ended December 31, 1998 to
approximately $24.4 million for the same twelve-month period in 1999.

For the twelve months ended December 31, 1999, operating loss from our
contract drilling operations was approximately $10.3 million as compared to
income of approximately $9.3 million in 1998. The decline in the contract
drilling segment's operating results was reflective of reduced pricing in our
contract services caused by significantly weakened commodity prices,
particularly for crude oil throughout fiscal year 1998 and the initial months of
1999, and the resulting 17% decrease in our utilization rate.

Oil and natural gas sales revenues were approximately $6.8 million for the
year ended December 31, 1999, as compared to approximately $5.6 million in 1998.
The volume of oil and natural gas sold by us decreased by approximately 11% in
1999, as compared to fiscal year 1998. The average price per Bbl of crude oil
received by us was $18.08 in 1999, as compared to $12.16 in 1998, and the
average price per Mcf of natural gas was $2.22 in 1999, as compared to $1.93 in
1998. Lease operating and production costs were $4.08 per BOE in both 1998 and
1999. General and administrative expense for the oil and natural gas segment was
approximately $1.2 million and $1.3 million for the years ended December 31,
1999 and 1998, respectively. Exploration costs were approximately $611,000 and
$669,000 for the years ended December 31, 1999 and 1998, respectively.
Depreciation and depletion expense was approximately $2.7 million in 1999, as
compared
31
32

to approximately $4.8 million in 1998. The decrease in depreciation and
depletion expense was reflective of the substantial increase in the market price
received for crude oil in December 31, 1999 versus December 31, 1998 which
resulted in increases in reserve quantities and a related reduction of the unit
of production rates. Specifically, the market price was $11.16 per barrel at
December 31, 1998 and $24.90 per barrel at December 31, 1999, an increase of
approximately 123%.

During 1998, primarily as a result of the industry's significantly reduced
commodity prices at December 31, 1998, we impaired certain of oil and natural
gas properties by $3.8 million. Comparatively, we incurred impairment expense of
approximately $275,000 in 1999. Other revenues generated by the oil and natural
gas segment, consisting primarily of fees generated from lease operating
activities, were approximately $1.6 million and $1.5 million for the years ended
December 31, 1999 and 1998, respectively. For the year ended December 31, 1999,
the oil and natural gas segment generated income from operations of
approximately $1.9 million as compared to a loss of approximately $6.2 million
for the year ended December 31, 1998. The fluctuation in the segment's operating
results was primarily attributable to the increase in the underlying commodity
prices as discussed above.

Operating revenues from our drilling fluid services were approximately
$11.7 million and $13.4 million for the twelve months ended December 31, 1999
and 1998, respectively. Operating costs incurred by the drilling fluids segment
were approximately $9.9 million in 1999 as compared to costs of approximately
$10.2 million in 1998. For the twelve months ended December 31, 1999,
depreciation and amortization expense was $1.1 million as compared to
approximately $895,000 in 1998. General and administrative expense for the
drilling fluids segment was approximately $2.0 million and $1.9 million for the
twelve months ended December 31, 1999 and 1998, respectively. This increase was
partially due to the addition of the administrative office in Corpus Christi,
Texas, acquired during September 1998 with our purchase of Tejas Drilling
Fluids, Inc. For the twelve months ended December 31, 1999, the drilling fluids
segment generated a net loss from operations of approximately $1.4 million as
compared to net operating income of approximately $360,000 for the comparative
twelve month period in 1998. The net loss from operations was consistent with
the decline in the segment's operating revenues and expenses as discussed above
and reflective of the deterioration in the industry's economic conditions.

For the year ended December 31, 1999, we incurred interest expense of
approximately $4.1 million as compared to $4.5 million in 1998 and earned
interest income of approximately $445,000 and $767,000 in 1999 and 1998,
respectively. In 1999, we recognized a net gain on the sale of property and
equipment of $129,000 as compared to approximately $636,000 in 1998.

INCOME TAXES

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
-------------------------
1998 1999 2000
---- ---- ----
<S> <C> <C> <C>
Income tax provision (benefit)............................ $ 93 $(4,341) $14,244
Effective tax rate........................................ 40.1% (32.2%) 37.5%
</TABLE>

We recognized income tax benefit of $4.3 million for the year ended
December 31, 1999, resulting from losses from operations. We recognized income
tax expense of $14.2 million for the year ended December 31, 2000, even though
minimal cash taxes were incurred as a result of utilization of income tax
benefits recognized in prior years. The federal statutory tax rate, used in the
provision, increased by 1% to 35% for the year ended December 31, 2000. The
state effective tax rate, used in the provision, increased to 1% for the year
ended December 31, 2000.

For tax purposes, we had available, at December 31, 2000, federal net
operating loss carryforwards of approximately $16.3 million, which will expire
in the year 2019 if unused. We also had available at December 31, 2000, $1.6
million of alternative minimum tax credits, which may be carried forward
indefinitely.

During the year ended December 31, 1996, we began recording non-cash
Federal deferred income taxes based primarily on the relationship between the
amount of our unused Federal NOL carryforwards and the

32
33

temporary differences between the book basis and tax basis in our assets.
Deferred tax assets and liabilities are measured using enacted tax rates
expected to apply to taxable income in the year in which those temporary
differences are expected to be recovered or settled. As a result of fully
recognizing the benefit of our deferred income taxes, we will incur deferred
income tax expense as these benefits are utilized. We incurred a deferred income
tax expense of approximately $15.9 million for the year ended December 31, 2000
and a deferred income tax benefit of approximately $7.1 million for the year
ended December 31, 1999.

VOLATILITY OF OIL AND NATURAL GAS PRICES

Our revenue, profitability and future rate of growth are substantially
dependent upon prevailing prices for oil and natural gas, with respect to our
contract drilling, oil and natural gas and drilling and completion fluids
segments. Historically, oil and natural gas prices and markets have been
extremely volatile. Prices are affected by market supply and demand factors as
well as actions of state and local agencies, the United States and foreign
governments and international cartels. All of these are beyond our control. Any
significant or extended decline in oil and/or natural gas prices will have a
material adverse effect on our financial condition and results of operations, as
evidenced by our performance. Low level commodity prices beginning in the fourth
quarter of 1997 and continuing into mid-1999 adversely impacted our operations.
Although there has been significant improvement in oil and natural gas prices
since mid-1999, we expect oil and natural gas prices to continue to be volatile
and therefore to affect the financial condition and operations of Patterson and
its ability to access capital sources.

IMPACT OF INFLATION

We believe that inflation will not have a significant near-term impact on
our financial position.

RECENTLY-ISSUED ACCOUNTING STANDARDS

The Company adopted Statement of Financial Accounting Standards No. 133, as
amended, "Accounting for Derivative Instruments and Hedging Activities" ("SFAS
No. 133") on January 1, 2001. SFAS No. 133 establishes accounting and reporting
standards for derivatives or instruments and for hedging activities. It requires
enterprises to recognize all derivatives as either assets or liabilities in the
balance sheet and measure those instruments at fair value. The requisite
accounting for changes in the fair value of a derivative depends on the intended
use of the derivative and the resulting designation. The Company was not
required to record any transitional adjustment upon the adoption of SFAS No.
133.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We have exposure to market risk associated with the floating rate portion
of the interest charged on the $24.4 million outstanding under our credit
facility with Transamerica Equipment Financial Services Corporation. The credit
facility, which matures on January 1, 2006, bears interest at LIBOR plus 3.10%
to 3.51%. Our exposure to interest rate risk due to changes in LIBOR is not
expected to be material and at December 31, 2000, the fair value of the
obligation approximates our related carrying value because the obligation bears
interest at the current market rate.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

Financial Statements are filed as a part of this report at the end of Part
IV hereof beginning at page F-1, Index to Consolidated Financial Statements, and
are incorporated herein by this reference.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
FINANCIAL DISCLOSURE.

None.

33
34

PART III

The information required by Part III is omitted from this report because
Patterson will file a definitive proxy statement pursuant to Regulation 14A of
the Securities Exchange Act of 1934 no later than 120 days after the end of the
fiscal year covered by this document and certain information included therein is
incorporated herein by reference.

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.

The information required by this Item is incorporated herein by reference
to the Proxy Statement.

ITEM 11. EXECUTIVE COMPENSATION.

The information required by this Item is incorporated herein by reference
to the Proxy Statement.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.

The information required by this Item is incorporated herein by reference
to the Proxy Statement.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.

The information required by this Item is incorporated herein by reference
to the Proxy Statement.

34
35

PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K.

(a)(1) Financial Statements.

See Index to Consolidated Financial Statements on page F-1 of this report.

(a)(2) Financial Statement Schedule.

Schedule II -- Valuation and qualifying accounts is filed herewith on page
S-1.

All other financial statement schedules have been omitted because they are
not applicable or the information required therein is included elsewhere in the
financial statements or notes thereto.

(a)(3) Exhibits.

The following exhibits are filed herewith or incorporated by reference
herein.

<TABLE>
<C> <S>
2.1 Plan and Agreement of Merger dated October 14, 1993, between
Patterson Energy, Inc., a Texas corporation, and Patterson
Energy, Inc., a Delaware corporation, together with related
Certificates of Merger.(1)
2.2 Agreement and Plan of Merger, dated April 22, 1996 among
Patterson Energy, Inc., Patterson Drilling Company and
Tucker Drilling Company, Inc.(2)
2.2.1 Amendment to Agreement and Plan of Merger, dated May 16,
1996 among Patterson Energy, Inc., Patterson Drilling
Company and Tucker Drilling Company, Inc.(3)
2.3 Stock Purchase Agreement, dated January 5, 1998, among
Patterson Energy, Inc., Spencer D. Armour, III. And Richard
G. Price.(16)
2.4 Stock Purchase Agreement, dated September 17, 1998, among
Lone Star Mud, Inc. and Mark Campbell (shareholder of Tejas
Drilling Fluids, Inc.).(4)
2.5 Asset Purchase Agreement dated as of September 30, 2000
between Ambar Drilling Fluids LP, LLLP and Ambar, Inc.(5)
2.6 Agreement and Plan of Merger, dated February 4, 2001, by and
between UTI Energy Corp. and Patterson Energy, Inc.
Disclosure schedules for each of the parties to the merger
agreement setting forth exceptions or other information
relating to their respective representations and warrants in
the agreement have not been filed with this exhibit. They
will, however, be made available supplementally to the SEC
upon request.(6)
3.1 Restated Certificate of Incorporation.(7)
3.1.1 Certificate of Amendment to the Certificate of
Incorporation.(8)
3.2 Bylaws.(1)
3.3 Rights Agreement dated January 2, 1997, between Patterson
Energy, Inc. and Continental Stock Transfer & Trust
Company.(15)
4.1 Excerpt from Restated Certificate of Incorporation of
Patterson Energy, Inc. regarding authorized Common Stock and
Preferred Stock.(9)
10.1 Loan and Security Agreement dated December 21, 1999 among
Patterson Drilling Company and Transamerica Equipment
Financial Services Corporation.(17)
10.1.1 Promissory Note dated December 21, 1999 between Patterson
Drilling Company and Transamerica Equipment Financial
Services Corporation.(17)
10.1.2 Corporate Guarantees of Lone Star Mud, Inc. and Patterson
Energy, Inc.(17)
10.2 Aircraft Lease, dated December 20, 2000, (effective January
1, 2001) between Talbott Aviation, Inc. and Patterson
Energy, Inc.
</TABLE>

35
36

<TABLE>
<S> <C>
10.3 Participation Agreement, dated October 19, 1994, between Patterson Petroleum Trading
Company, Inc. and BHT Marketing, Inc.(10)
10.3.1 Participation Agreement dated October 24, 1995, between Patterson Petroleum Trading
Company, Inc. and BHT Marketing, Inc.(11)
10.4 Crude Oil Purchase Contract, dated October 19, 1994, between Patterson Petroleum, Inc. and
BHT Marketing, Inc.(10)
10.4.1 Crude Oil Purchase Contract, dated October 24, 1995, between Patterson Petroleum, Inc. and
BHT Marketing, Inc.(11)
10.5 Patterson Energy, Inc. 1993 Stock Incentive Plan, as amended.(12)
10.6 Patterson Energy, Inc. Non-Employee Directors' Stock Option Plan, as amended.(13)
10.7 Model Form Operating Agreement.(14)
10.8 Form of Drilling Bid Proposal and Footage Drilling Contract.(14)
10.9 Form of Turnkey Drilling Agreement.(14)
21.1 Subsidiaries of the registrant.
23.1 Consent of Independent Accountants -- PricewaterhouseCoopers LLP.
23.2 Consent of Independent Petroleum Engineer -- M. Brian Wallace, P.E.
</TABLE>

- ---------------

(1) Incorporated herein by reference to Item 27, "Exhibits" to Amendment No. 2
to Registration Statement on Form SB-2 (File No. 33-68058-FW); filed
October 28, 1993.

(2) Incorporated by reference to Item 7, "Financial Statements and Exhibits" to
Form 8-K dated April 22, 1996 and filed on April 30, 1996.

(3) Incorporated by reference to Item 7, "Financial Statements and Exhibits" to
Form 8-K dated May 16, 1996 and filed on May 22, 1996.

(4) Incorporated by reference to Item 14, "Financial Statements Schedules and
Reports on Form 8-K" to Form 10-K for the year ended December 31, 1998.

(5) Incorporated by reference to Item 7, "Financial Statements and Exhibits" to
Form 8-K dated October 3, 2000 and filed on November 6, 2000.

(6) Incorporated herein by reference to Item 7, "Financial Statements and
Exhibits" to Form 8-K dated February 4, 2001 and filed February 16, 2001.

(7) Incorporated herein by reference to Item 6, "Exhibits and Reports on Form
8-K" to Form 10-Q for the quarterly period ended June 30, 1996; filed
August 12, 1996.

(8) Incorporated herein by reference to Item 6. "Exhibits and Reports on Form
8-K" to Form 10-Q for the quarterly period ended June 30, 1997; filed
August 14, 1997.

(9) Incorporated herein by reference to Item 16, "Exhibits" to Registration
Statement on Form S-3 filed on December 18, 1996.

(10) Incorporated herein by reference to Item 27, "Exhibits" to Post Effective
Amendment No. 1 to Registration Statement on Form SB-2 (File No.
33-68058-FW); filed on June 21, 1995.

(11) Incorporated by reference to Item 13, "Exhibits and Reports on Form 8-K" to
Form 10-KSB for the year ended December 31, 1995.

(12) Incorporated herein by reference to Item 8, "Exhibits" to Registration
Statement on Form S-8 (File No. 333-47917); filed March 13, 1998.

(13) Incorporated herein by reference to Item 8, "Exhibits" to Registration
Statement on Form S-8 (File No. 33-39471); filed November 4, 1997.

(14) Incorporated by reference to Item 27, "Exhibits" to Registration Statement
on Form SB-2 (File No. 33-68058-FW); filed on August 30, 1993.

36
37

(15) Incorporated by reference to Item 2, "Exhibits" to Registration Statement
on Form 8-A filed on January 14, 1997.

(16) Incorporated herein by reference to Item 16, "Exhibits" to Registration
Statement on Form S-3 filed January 5, 1998.

(17) Incorporated by reference to Item 14, "Exhibits, Financial Statement
Schedules and Reports on Form 8-K" to Form 10-K for the year ended December
31, 1999.

(b) Reports on Form 8-K.

(1) Report dated November 15, 2000 announcing execution of a letter of intent to
acquire twenty-one drilling rigs from Jones Drilling Corporation; filed
December 1, 2000.

(2) Report dated November 20, 2000 announcing the Company's addition of two
members to Patterson's board of directors; filed December 1, 2000.

(3) Report dated October 3, 2000 announcing Patterson's acquisition of the
drilling and completion fluids services of Ambar, Inc.; filed November 6,
2000.

37
38

INDEX TO
CONSOLIDATED FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
PAGE
----
<S> <C>
REPORT OF INDEPENDENT ACCOUNTANTS......................... F-2
CONSOLIDATED FINANCIAL STATEMENTS:
CONSOLIDATED BALANCE SHEETS AS OF DECEMBER 31, 1999 AND
2000.................................................. F-3
CONSOLIDATED STATEMENTS OF OPERATIONS FOR THE YEARS
ENDED DECEMBER 31, 1998, 1999 AND 2000................ F-4
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY FOR THE
YEARS ENDED DECEMBER 31, 1998, 1999 AND 2000.......... F-5
CONSOLIDATED STATEMENTS OF CASH FLOWS FOR THE YEARS
ENDED DECEMBER 31, 1998, 1999 AND 2000................ F-6
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS............. F-8
</TABLE>

F-1
39

REPORT OF INDEPENDENT ACCOUNTANTS

The Board of Directors and Stockholders of
Patterson Energy, Inc.

In our opinion, the consolidated financial statements listed in the
accompanying index present fairly, in all material respects, the financial
position of Patterson Energy, Inc. and Subsidiaries at December 31, 1999 and
2000 and the results of their operations and their cash flows for each of the
three years in the period ended December 31, 2000, in conformity with accounting
principles generally accepted in the United States of America. In addition, in
our opinion, the financial schedule listed in Item 14(a) present fairly, in all
material respects, the information set forth therein, when read in conjunction
with the related consolidated financial statements. These financial statements
and financial statement schedule are the responsibility of the Company's
management; our responsibility is to express an opinion on these financial
statements and financial statement schedule based on our audits. We conducted
our audits of these statements in accordance with auditing standards generally
accepted in the United States of America, which require that we plan and perform
the audit to obtain reasonable assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements,
assessing the accounting principles used and significant estimates made by
management, and evaluating the overall financial statement presentation. We
believe that our audits provide a reasonable basis for our opinion.

PricewaterhouseCoopers LLP

Fort Worth, Texas
February 27, 2001

F-2
40

PATTERSON ENERGY, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
DECEMBER 31,
-------------------------------
1999 2000
---- ----
(IN THOUSANDS, EXCEPT FOR SHARE
DATA)
<S> <C> <C>
ASSETS
Current assets:
Cash and cash equivalents................................. $ 8,792 $ 59,355
Accounts receivable:
Trade, less allowance for doubtful accounts of $364,519
and $1,502,532 at December 31, 1999 and 2000,
respectively.......................................... 41,571 78,364
Oil and natural gas sales.............................. 803 1,255
Federal income taxes receivable........................... -- 2,447
Inventories............................................... 1,970 12,186
Deferred income taxes..................................... 964 9,133
Undeveloped oil and natural gas properties held for
resale................................................. 2,658 1,680
Other..................................................... 2,006 3,343
---------- ----------
Total current assets.............................. 58,764 167,763
Property and equipment, at cost, net........................ 133,824 202,592
Intangible assets, net...................................... 41,818 38,641
Other....................................................... 1,851 1,590
---------- ----------
Total assets...................................... $ 236,257 $ 410,586
========== ==========

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Current maturities of notes payable....................... $ -- $ 4,477
Accounts payable:
Trade.................................................. 23,676 28,484
Revenue distribution................................... 2,407 3,896
Other.................................................. 1,201 10,119
Accrued expenses.......................................... 4,432 9,902
---------- ----------
Total current liabilities......................... 31,716 56,878
Deferred income taxes, net.................................. 1,688 30,083
Other....................................................... 65 880
Notes payable, net of current maturities.................... 50,000 19,939
---------- ----------
Total liabilities................................. 83,469 107,780
---------- ----------
Commitments and contingencies............................... -- --
Stockholders' equity:
Preferred stock, par value $.01; authorized 1,000,000
shares, no shares issued............................... -- --
Common stock, par value $.01; authorized 50,000,000 shares
with 32,675,678 and 37,477,276 issued and 32,675,678
and 37,177,276 outstanding at December 31, 1999 and
2000, respectively..................................... 327 375
Additional paid-in capital................................ 117,597 245,462
Retained earnings......................................... 34,864 58,619
Treasury stock, at cost, 300,000 shares at December 31,
2000................................................... -- (1,650)
---------- ----------
Total stockholders' equity........................ 152,788 302,806
---------- ----------
Total liabilities and stockholders' equity........ $ 236,257 $ 410,586
========== ==========
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.
F-3
41

PATTERSON ENERGY, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
---------------------------------------
1998 1999 2000
---- ---- ----
(IN THOUSANDS, EXCEPT PER SHARE DATA)
<S> <C> <C> <C>
Operating revenues:
Drilling............................................. $ 165,997 $ 131,287 $ 260,233
Drilling fluids sales................................ 13,397 11,686 32,053
Oil and natural gas sales............................ 5,641 6,834 13,619
Well operation fees.................................. 1,442 1,567 1,978
Other................................................ 87 162 18
---------- ---------- ----------
186,564 151,536 307,901
---------- ---------- ----------
Operating costs and expenses:
Direct drilling costs................................ 128,838 113,569 190,234
Drilling and completion fluids....................... 10,205 9,864 26,545
Lease operating and production....................... 1,924 1,720 3,245
Impairment of proved oil and natural gas
properties........................................ 3,816 275 --
Exploration costs.................................... 669 611 663
Dry holes and abandonments........................... 1,083 169 964
Depreciation, depletion and amortization............. 28,091 28,156 33,133
General and administrative........................... 9,313 7,299 11,394
---------- ---------- ----------
183,939 161,663 266,178
---------- ---------- ----------
Operating income (loss)................................ 2,625 (10,127) 41,723
---------- ---------- ----------
Other income (expense):
Net gain on sale of assets........................... 636 129 194
Interest income...................................... 767 445 999
Interest expense..................................... (4,471) (4,101) (4,997)
Other................................................ 211 186 80
---------- ---------- ----------
(2,857) (3,341) (3,724)
---------- ---------- ----------
Income (loss) before income taxes...................... (232) (13,468) 37,999
---------- ---------- ----------
Income tax expense (benefit):
Current.............................................. (6,358) 2,767 (1,697)
Deferred............................................. 6,451 (7,108) 15,941
---------- ---------- ----------
93 (4,341) 14,244
---------- ---------- ----------
Net income (loss)...................................... $ (325) $ (9,127) $ 23,755
========== ========== ==========
Net income (loss) per common share:
Basic................................................ $ (0.01) $ (0.28) $ 0.69
========== ========== ==========
Diluted.............................................. $ (0.01) $ (0.28) $ 0.66
========== ========== ==========
Weighted average number of common shares outstanding:
Basic................................................ 31,645 32,499 34,347
========== ========== ==========
Diluted.............................................. 31,645 32,499 35,753
========== ========== ==========
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.
F-4
42

PATTERSON ENERGY, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>
COMMON STOCK
------------------ ADDITIONAL
NUMBER PAID-IN RETAINED TREASURY
OF SHARES AMOUNT CAPITAL EARNINGS STOCK TOTAL
--------- ------ ---------- -------- -------- -----
(IN THOUSANDS)
<S> <C> <C> <C> <C> <C> <C>
December 31, 1997......... 30,967 $ 310 $ 102,306 $ 44,316 $ -- $ 146,932
Issuance of common
stock................ 571 5 9,941 -- -- 9,946
Exercise of stock
options.............. 133 2 297 -- -- 299
Net loss................ -- -- -- (325) -- (325)
------- ------ ---------- --------- --------- ----------
December 31, 1998......... 31,671 317 112,544 43,991 -- 156,852
Issuance of common
stock................ 826 8 4,200 -- -- 4,208
Stock option
compensation......... -- -- 250 -- -- 250
Exercise of stock
options.............. 179 2 603 -- -- 605
Net loss................ -- -- -- (9,127) -- (9,127)
------- ------ ---------- --------- --------- ----------
December 31, 1999......... 32,676 327 117,597 34,864 -- 152,788
Issuance of common
stock................ 4,203 42 120,964 -- -- 121,006
Issuance of stock
purchase warrant..... -- -- 900 -- -- 900
Treasury stock
acquired............. -- -- -- -- (1,650) (1,650)
Exercise of stock
options.............. 598 6 3,225 -- -- 3,231
Tax benefit related to
exercise of stock
options.............. -- -- 2,776 -- -- 2,776
Net income.............. -- -- -- 23,755 -- 23,755
------- ------ ---------- --------- --------- ----------
December 31, 2000......... 37,477 $ 375 $ 245,462 $ 58,619 $ (1,650) $ 302,806
======= ====== ========== ========= ========= ==========
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.
F-5
43

PATTERSON ENERGY, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
YEARS ENDED DECEMBER 31,
------------------------------
1998 1999 2000
---- ---- ----
(IN THOUSANDS)
<S> <C> <C> <C>
Cash flows from operating activities:
Net income (loss)......................................... $ (325) $ (9,127) $ 23,755
Adjustments to reconcile net income (loss) to net cash
provided by operating activities:
Abandonment of oil and natural gas properties............. 694 169 964
Depreciation, depletion and amortization.................. 28,091 28,156 33,133
Impairment of proved oil and natural gas properties....... 3,816 275 --
Net gain on sale of assets................................ (636) (129) (194)
Deferred income tax expense (benefit)..................... 6,451 (7,108) 15,941
Compensation related to issuance of stock options......... -- 250 --
Change in operating assets and liabilities:
(Increase) decrease in trade accounts receivable..... 16,116 (12,955) (25,969)
(Increase) decrease in oil and natural gas sales
receivable........................................ 347 (377) (452)
Increase in inventories.............................. (1,283) (687) (1,520)
(Increase) decrease in federal income taxes
receivable........................................ (8,400) 8,400 (2,447)
Decrease in undeveloped oil and natural gas
properties held for resale........................ 873 556 14
Increase in other current assets..................... (475) (699) (1,199)
Increase (decrease) in trade accounts payable........ (2,378) 13,928 (3,918)
Increase (decrease) in revenue distribution
payable........................................... (1,962) 1,017 1,489
Decrease in state and federal income taxes payable... (6,874) -- --
Increase (decrease) in accrued expenses.............. (1,972) 1,262 3,657
Increase (decrease) in other current payables........ (1,496) 1,128 5,826
Decrease in other liabilities........................ (595) (27) (75)
-------- -------- --------
Net cash provided by operating activities......... 29,992 24,032 49,005
-------- -------- --------
Cash flows from investing activities:
Net sales of investment securities........................ 566 -- --
Acquisitions.............................................. (45,453) -- (17,807)
Purchases of property and equipment....................... (34,148) (19,085) (57,153)
Proceeds from sales of property and equipment............. 1,361 1,248 1,125
Change in other assets.................................... 567 (1,281) 630
-------- -------- --------
Net cash used in investing activities............. (77,107) (19,118) (73,205)
-------- -------- --------
Cash flows from financing activities:
Proceeds from notes payable............................... 40,150 50,000 14,416
Payments on notes payable................................. (7,686) (55,714) (40,000)
Issuance of common stock.................................. -- -- 98,766
Purchase of treasury stock................................ -- -- (1,650)
Proceeds from exercise of stock options................... 299 606 3,231
-------- -------- --------
Net cash provided by (used in) financing
activities...................................... 32,763 (5,108) 74,763
-------- -------- --------
Net increase (decrease) in cash and cash
equivalents..................................... (14,352) (194) 50,563
Cash and cash equivalents at beginning of year.............. 23,338 8,986 8,792
-------- -------- --------
Cash and cash equivalents at end of year.................... $ 8,986 $ 8,792 $ 59,355
======== ======== ========
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.
F-6
44
PATTERSON ENERGY, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS -- (CONTINUED)

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
------------------------------
1998 1999 2000
---- ---- ----
(IN THOUSANDS)
<S> <C> <C> <C>
Supplemental disclosure of cash flow information:
Cash paid during the period for:
Interest........................................ $ 4,471 $ 3,782 $ 5,117
Income taxes.................................... 8,000 48 3,200
</TABLE>

Noncash investing and financing activities:

During 2000, the Company acquired WEK Drilling Co., Inc., High Valley
Drilling, Inc., and the drilling and completion fluids operations of Ambar,
Inc., for an aggregate purchase price of approximately $40.9 million of which
approximately $17.8 million was paid in cash as follows:

<TABLE>
<CAPTION>
(IN THOUSANDS)
<S> <C>
Purchase price.............................................. $ 40,947
Less non-cash items:
Common stock issued....................................... (22,240)
Warrants issued........................................... (900)
----------
Total cash paid................................... $ 17,807
==========
</TABLE>

During 1999, the Company issued 825,776 shares of its common stock in two
separate unrelated transactions to acquire the drilling assets of Padre
Industries, Inc. for an aggregate purchase price of approximately $4.0 million
(see Notes 2 and 9) and other drilling equipment for approximately $208,000 (see
Note 9).

During 1998, the Company acquired Lone Star Mud, Inc., Robertson Onshore
Drilling Company and Tejas Drilling Fluids, Inc. for an aggregate purchase price
of approximately $58.8 million of which, approximately $45.5 million was paid in
cash as follows (see Note 2):

<TABLE>
<CAPTION>
(IN THOUSANDS)
<S> <C>
Purchase price.............................................. $ 58,799
Less non-cash items:
Common stock issued....................................... (9,946)
Debt assumed.............................................. (3,400)
---------
Total cash paid................................... $ 45,453
=========
</TABLE>

The accompanying notes are an integral part of these consolidated financial
statements.
F-7
45

PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

A summary of the significant accounting policies follows:

Principles of consolidation -- The consolidated financial statements
include the accounts of Patterson Energy, Inc. ("Patterson") and its
wholly-owned subsidiaries, (collectively referred to herein as "Patterson" or
the "Company"). All significant intercompany accounts and transactions have been
eliminated.

Description of business -- The Company engages in onshore contract drilling
of oil and natural gas, the development, exploration, acquisition and production
of oil and natural gas and provides contract drilling fluid services to the oil
and natural gas industry. The Company provides contract drilling services to
major oil and natural gas companies and independent producers in Texas, New
Mexico, Oklahoma, Louisiana and Utah.

The contract drilling business experienced increased demand for drilling
services from 1995 through the third quarter of 1997 due to stronger crude oil
and natural gas prices. The increase in demand returned beginning in mid-1999
and has continued through 2000. However, except for that period and other
occasional upturns, the market for onshore contract drilling and other related
services has generally been depressed since mid-1982, when crude oil and natural
gas prices began to weaken. A particularly sharp decline in demand for these
services occurred in 1986 because of the worldwide collapse in crude oil prices.
Since this time and except during the occasional upturns, there have been
substantially more drilling rigs available than necessary to meet demand in most
operating and geographic segments of the domestic drilling industry. In addition
to adverse effects that future declines in demand could have on the Company,
ongoing movement or reactivation of onshore drilling rigs or new construction of
drilling rigs could adversely affect rig utilization rates and pricing, even in
an environment of stronger oil and natural gas prices and increased drilling
activity. The Company cannot predict either the future level of demand for its
contract drilling and other related services or future conditions in the oil and
natural gas industry. The Company's rig utilization rate reached an all time
high of approximately 91.5% in the third quarter of 1997, but has weakened since
then due to the significant reduction in the price of crude oil during 1998 and
the first half of 1999. Although there has been significant improvement in oil
and natural gas prices since mid-1999, the Company expects such commodity prices
to continue to be volatile and, therefore, to affect the financial condition and
operations of the Company and its ability to access capital.

Management estimates -- The preparation of financial statements in
conformity with generally accepted accounting principles requires management to
make estimates and assumptions that affect the reported amounts of assets and
liabilities and disclosure of contingent assets and liabilities at the date of
the financial statements and the reported amounts of revenues and expenses
during the reporting period. Actual results could differ from those estimates.

Drilling operations -- The Company follows the percentage-of-completion
method of accounting for footage and day work drilling arrangements. Under this
method all drilling revenues, direct costs and appropriate portions of indirect
costs, related to the contracts in progress, are recognized as contract drilling
services are performed.

Due to the nature of turnkey drilling arrangements, the Company follows the
completed contract method of accounting for such arrangements. Under this
method, all drilling advances, direct costs and appropriate portions of indirect
costs (including maintenance, repairs and depreciation) related to the contracts
in progress are deferred and recognized as revenues and expenses in the period
the contracts are completed.

Provisions for losses are made on incomplete contracts when estimated total
costs are expected to exceed total estimated revenues.

Inventories -- Inventories consist primarily of chemical products to be
used in conjunction with the Company's contract drilling fluid activities. The
inventories are stated at the lower of cost or market, determined by the
first-in, first-out method.
F-8
46
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)

Undeveloped oil and natural gas properties held for resale -- Undeveloped
oil and natural gas properties held for resale represent leasehold interests in
unproven oil and natural gas properties which the Company expects to sell or
develop under arrangements which will provide for reimbursement of such costs to
the Company. Such properties are carried at the lower of cost or net realizable
value. The Company recognizes gains or losses upon disposition or impairment of
the properties.

Property and equipment -- Property and equipment (other than oil and
natural gas) -- Property and equipment is carried at cost less accumulated
depreciation. Depreciation is provided on the straight-line method over the
estimated useful lives as defined below. The Company incurred depreciation
expense of approximately $20.2 million, $22.0 million and $25.9 million for the
years ended December 31, 1998, 1999 and 2000, respectively.

<TABLE>
<CAPTION>
LIVES (YEARS)
-------------
<S> <C>
Drilling rigs and related equipment......................... 2-15
Office furniture............................................ 3-10
Buildings................................................... 5-20
Automotive equipment........................................ 2-7
Other....................................................... 3-7
</TABLE>

Oil and natural gas properties -- The Company follows the successful
efforts method of accounting, using the field as its accumulation center for
capitalized costs. Under the successful efforts method of accounting, costs
which result directly in the discovery of oil and natural gas reserves and all
development costs are capitalized. Exploration costs which do not result
directly in discovering oil and natural gas reserves are charged to expense as
incurred. The capitalized costs, consisting of lease and well equipment, lease
acquisition costs and intangible development costs are depreciated, depleted and
amortized on the units-of-production method, based on petroleum engineer
estimates of recoverable proved developed oil and natural gas reserves of each
respective field. The Company incurred depletion expense of approximately $4.6
million, $2.7 million and $3.4 million for the years ended December 31, 1998,
1999 and 2000, respectively.

Impairment of long-lived assets -- Net capitalized costs of long-lived
assets, certain identifiable intangibles and goodwill are reduced to reflect an
amount which is expected to be recovered through the future cash flows generated
by the use of the related assets. Impairment of proved oil and natural gas
properties is periodically assessed based on estimated future net cash flows at
a field level as determined by an independent reserve engineer. The Company
incurred approximately $3.8 million and $275,000 of impairment to such
properties for the years ended December 31, 1998 and, 1999 respectively.
Impairment to the Company's oil and natural gas properties was primarily
attributable to a significant decline in the market price of crude oil and/or
revisions to existing reserve estimates.

Maintenance and repairs -- Maintenance and repairs are charged against
operations. Renewals and betterments which extend the life or improve existing
properties are capitalized.

Retirements -- Upon disposition or retirement of property and equipment
(other than oil and natural gas properties), the cost and related accumulated
depreciation are removed and the gain or loss thereon, if any, is credited or
charged to operations. The Company recognizes the gain or loss on the sale of
either a part of a proved oil and natural gas property or an entire proved oil
and natural gas property constituting a part of a field upon the sale or
disposition of such. The unamortized cost of the property or group of
properties, a part of which was sold or otherwise disposed of, is apportioned to
the interest sold and the interest retained on the basis of the fair value of
those interests.

Intangible assets -- Intangible assets consist primarily of goodwill and
covenants not to compete arising from business combinations (see Notes 2 and 5).
The values assigned to intangible assets, based in part upon

F-9
47
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)

independent appraisals, are amortized on a straight line basis. Goodwill,
representing the excess of the purchase price over the estimated fair value of
the net assets of the acquired business, is amortized over the period of
expected benefit of 15 years. Covenants not to compete are amortized over their
contractual lives. Amortization expense charged to operations for the years
ended December 31, 1998, 1999 and 2000 was approximately $3.3 million, $3.6
million and $3.8 million, respectively.

Earnings per share -- The Company provides a dual presentation of its
earnings per share; Basic Earnings per Share ("Basic EPS") and Diluted Earnings
per Share ("Diluted EPS") in its Consolidated Statements of Operations. Basic
EPS is computed using the weighted average number of shares outstanding during
the year. Diluted EPS includes common stock equivalents, which are dilutive to
earnings per share. Dilutive securities, consisting of certain stock options and
warrants as described in Note 10, of approximately 1.5 million and 2.4 million
were excluded from the December 31, 1998 and 1999 calculations of Diluted EPS as
a result of the Company's net loss for each of those years. For the year ended
December 31, 2000, dilutive securities included in the calculation of Diluted
EPS were 1.4 million.

Stock splits -- On July 25, 1997 and January 23, 1998, the Company effected
two-for-one splits of its common stock. All information regarding earnings per
share, weighted average number of common shares outstanding, stock options and
warrants issued and exercised and all other related disclosures herein reflect
the effects of the stock splits for all periods presented (see Note 9).

Income taxes -- The asset and liability method is used in accounting for
income taxes. Under this method, deferred tax assets and liabilities are
recognized for operating loss and tax credit carryforwards and for the future
tax consequences attributable to differences between the financial statement
carrying amounts of existing assets and liabilities and their respective tax
bases. Deferred tax assets and liabilities are measured using enacted tax rates
expected to apply to taxable income in the years in which those temporary
differences are expected to be recovered or settled. The effect on deferred tax
assets and liabilities of a change in tax rates is recognized in the results of
operations in the period that includes the enactment date. A valuation allowance
is recorded to reduce the carrying amounts of deferred tax assets unless it is
more likely than not that such assets will be realized.

Stock based compensation -- The Company grants stock options to employees
and non-employee directors under stock-based incentive compensation plans, (the
"Plans"). The Company uses the intrinsic value based method of accounting for
the Plans. Under this method, the Company records no compensation expense for
stock options granted when the exercise price for options granted is equal to
the fair market value of the Company's stock on the date of the grant.

Statement of cash flows -- For purposes of reporting cash flows, cash and
cash equivalents include cash on hand, cash on deposit and unrestricted
certificates of deposit with original maturities of 90 days or less.

Recently Issued Accounting Standards -- The Company adopted Statement of
Financial Accounting Standards No. 133, as amended, "Accounting for Derivative
Instruments and Hedging Activities" ("SFAS No. 133") on January 1, 2001. SFAS
No. 133 establishes accounting and reporting standards for derivatives or
instruments and for hedging activities. It requires enterprises to recognize all
derivatives as either assets or liabilities in the balance sheet and measure
those instruments at fair value. The requisite accounting for changes in the
fair value of a derivative depends on the intended use of the derivative and the
resulting designation. The Company was not required to record any transitional
adjustment upon the adoption of SFAS No. 133.

Reclassifications -- Certain reclassifications have been made to the 1998
and 1999 consolidated financial statements in order for them to conform with the
2000 presentation. The reclassifications had no effect on net income (loss) or
stockholders' equity for these years.

F-10
48
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

2. MERGERS AND ACQUISITIONS

2000 MERGER AND ACQUISITIONS

WEK Drilling Co., Inc. -- On March 31, 2000, the Company acquired the
outstanding stock of WEK Drilling Co., Inc., a privately held, non-affiliated
drilling company with its principal operations in Southeast New Mexico. The
purchase price of $6.8 million, which is net of cash acquired, was funded using
$5.66 million of proceeds from the Company's existing credit facility and 53,000
shares of the Company's common stock valued at $29.0625 per share and
approximately $77,000 of direct costs incurred related to the transaction. The
assets acquired consisted of four operable drilling rigs, other related
equipment, and working capital of $1.2 million. Immediately following the
transaction, certain assets unrelated to the oil and natural gas industry were
sold back to one of the previous owners for a cash payment of $1.0 million. The
purchase price of $6.8 million, less the $1.0 million of unrelated assets that
were subsequently sold and the net working capital acquired, was allocated among
the acquired assets based upon the estimated fair market value of the drilling
rigs and related equipment.

High Valley Drilling, Inc. -- On June 2, 2000, the Company completed the
merger of High Valley Drilling, Inc., a privately held, non-affiliated company,
with and into Patterson Drilling LP, a wholly owned subsidiary of Patterson
Energy, Inc. The purchase price of $21.8 million was funded using 1.150 million
shares of common stock valued at $18 per share, three-year warrants to acquire
127,000 shares at $22 per share and approximately $208,000 of direct costs
incurred related to the transaction. Using a Black-Scholes model, the warrants
were valued at $900,000. The assets acquired consisted of eight drilling rigs
and other related equipment. The purchase price was allocated among such assets
based upon the estimated fair market value of the drilling rigs and related
equipment.

Ambar, Inc. -- On October 3, 2000, the Company completed, through a wholly
owned subsidiary, the acquisition of the drilling and completion fluid
operations of Ambar, Inc., a non-affiliated entity with its principal operations
in Louisiana, the Gulf Coast region of South Texas and the Gulf of Mexico. The
purchase price of $12.4 million consisted of cash of $11.7 million and $680,000
of direct costs incurred related to the acquisition. The assets acquired
included net working capital of approximately $7.8 million (current assets of
$18.2 million and current liabilities assumed of $10.4 million), fixed assets
with a market value of $15.7 million and other trademarks and intellectual
property which are specific to the division's operations. The purchase price,
net of working capital acquired, was allocated to the fixed assets.

The Company's operating results include the operations of the acquired
entities since their respective acquisition dates. The following summary,
prepared on a pro forma basis, combines the consolidated results of operations
as if the transactions had occurred on January 1, 1999, after including the
impact of certain adjustments, such as restatement of depreciation using fair
values instead of book values of the assets acquired, the increased interest
expense on the acquisition debt and the related income tax effects.

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
--------------------------
1999 2000
----------- -----------
(UNAUDITED)
(IN THOUSANDS, EXCEPT PER
SHARE AMOUNTS)
<S> <C> <C>
Revenues................................................... $ 217,844 $ 357,995
Net income (loss).......................................... (10,157) 24,844
Net income per basic share................................. $ (0.30) $ 0.70
Net income per diluted share............................... (0.30) 0.70
</TABLE>

The pro forma results have been prepared for comparative purposes only and
do not purport to be indicative of what would have occurred had the acquisition
been made as of the date indicated. In addition,

F-11
49
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

2. MERGERS AND ACQUISITIONS -- (CONTINUED)

they are not intended to be a projection of future results and do not reflect
any synergies that might be achieved from combined operations.

1999 ACQUISITION

Padre Industries, Inc. -- On January 27, 1999, the Company completed the
acquisition of five drilling rigs and other related equipment from a privately
held, non-affiliated entity based in Corpus Christi, Texas. The purchase price
consisted of 800,000 shares of the Company's stock at a guaranteed value of
$5.00 per share. As part of the acquisition agreement, the Company had the
option exercisable on February 1, 2000 to buy back 300,000 of the 800,000 shares
at $5.50 per share. The Company exercised its option on February 1, 2000. The
purchase price of $4.0 million was allocated among such assets based upon the
estimated fair market value of the drilling rigs and related equipment.

1998 MERGER AND ACQUISITIONS

Lone Star Mud, Inc. -- On January 5, 1998, the Company acquired 100% of the
outstanding stock of Lone Star Mud, Inc. ("Lone Star"), a privately-owned,
non-affiliated company based in Midland, Texas. The purchase price of
approximately $13.0 million consisted of $1.4 million in cash, 571,328 shares of
the Company's common stock valued at $17.41 per share, the assumption of $1.6
million of debt and approximately $3,300 of other direct costs incurred relative
to the transaction. Pursuant to certain terms of the Company's existing loan
agreement with Norwest Bank Texas, N.A. ("Norwest"), the outstanding balance of
the above mentioned debt was paid in full. The purchase price was allocated
based upon the fair value of the net assets acquired and resulted in the
recognition of approximately $9.9 million of goodwill.

Robertson Onshore Drilling Company -- On February 6, 1998, the Company
completed the merger of Robertson Onshore Drilling Company ("Robertson") a
privately-owned, non-affiliated, contract drilling company based in Dallas,
Texas, with and into Patterson Onshore Drilling Company, a wholly-owned
subsidiary of Patterson Drilling Company. The purchase price of approximately
$42.2 million was funded using cash on hand of approximately $3.25 million,
proceeds of $36.75 million provided by the Company's line of credit, the
assumption of $1.8 million of debt and approximately $444,000 of direct costs
incurred related to the acquisition. The assets acquired consisted of 15
operable drilling rigs and a shop and yard located in Liberty City, Texas. The
purchase price was allocated based upon the estimated fair value of the net
assets acquired and resulted in the recognition of approximately $10.7 million
of goodwill.

Tejas Drilling Fluids, Inc. -- On September 17, 1998, the Company acquired
100% of the outstanding stock of Tejas Drilling Fluids, Inc. ("Tejas"), a
privately-owned, non-affiliated company based in Corpus Christi, Texas for $3.5
million cash and approximately $74,000 of other direct costs incurred relative
to the transaction. The fair market values of the assets acquired were estimated
and the purchase price was allocated accordingly, resulting in the recognition
of approximately $2.1 million of goodwill and $1.3 million of covenants not to
compete.

The aforementioned acquisitions completed during fiscal years 1998, 1999
and 2000 have been accounted for as purchases and the related results of
operations and cash flows of the acquired entities have been included in the
consolidated financial statements since their respective dates of acquisition.

3. CASH

Included in cash as of December 31, 1999 and 2000 was approximately $2.4
million and $3.9 million respectively, of monthly oil and natural gas sales to
be distributed to revenue owners subsequent to year-end.

F-12
50
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

4. PROPERTY AND EQUIPMENT

Property and equipment consisted of the following at December 31, 1999 and
2000 (in thousands):

<TABLE>
<CAPTION>
1999 2000
---- ----
<S> <C> <C>
Drilling rigs and related equipment......................... $ 215,312 $ 297,461
Producing oil and natural gas properties.................... 32,962 37,646
Other equipment............................................. 2,143 9,379
Buildings................................................... 4,226 6,297
Land........................................................ 1,492 2,123
---------- ----------
256,135 352,906
Less accumulated depreciation and depletion................. (122,311) (150,314)
---------- ----------
$ 133,824 $ 202,592
========== ==========
</TABLE>

5. INTANGIBLE ASSETS

Intangible assets consisted of the following at December 31, 1999 and 2000
(in thousands):

<TABLE>
<CAPTION>
1999 2000
---- ----
<S> <C> <C>
Goodwill.................................................... $ 46,983 $ 46,983
Covenants not to compete.................................... 1,673 1,673
Other....................................................... 979 1,341
---------- ----------
49,635 49,997
Less accumulated amortization............................... (7,817) (11,356)
---------- ----------
$ 41,818 $ 38,641
========== ==========
</TABLE>

6. ACCRUED EXPENSES

Accrued expenses consisted of the following at December 31, 1999 and 2000
(in thousands):

<TABLE>
<CAPTION>
1999 2000
---- ----
<S> <C> <C>
Salaries, wages, related payroll taxes and benefits......... $ 2,318 $ 4,171
Workers' compensation liability............................. 1,370 1,686
Sales tax................................................... 359 944
Accrued purchases........................................... -- 1,939
Other....................................................... 385 1,162
---------- ----------
$ 4,432 $ 9,902
========== ==========
</TABLE>

F-13
51
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

7. NOTES PAYABLE

Notes payable consisted of the following at December 31, 1999 and 2000 (in
thousands):

<TABLE>
<CAPTION>
1999 2000
---- ----
<S> <C> <C>
Line of credit agreement with Transamerica Equipment
Financial Services Corporation providing for an advancing,
non-revolving credit facility of $70 million ($60 million
at December 31, 1999), monthly payments of interest only
at LIBOR plus 3.10% to 3.51% (9.835% to 10.245% at
December 31, 2000) through January 1, 2001 at which time
the outstanding principal balance converts to a term loan
with a maturity of January 1, 2006. The obligation is
collateralized by drilling rigs and other related
equipment................................................. $ 50,000 $ 24,416
Less current maturities................................... -- (4,477)
--------- ---------
$ 50,000 $ 19,939
========= =========
</TABLE>

On December 22, 1999, the Company entered into a credit agreement with
Transamerica Equipment Financial Services Corporation (the "Transamerica
Credit") providing for a non-revolving credit facility of $60.0 million. The
terms of the credit agreement included payments of interest only through January
1, 2001 at which time the outstanding principal amount would convert to a term
loan with a maturity date of January 1, 2006. The Company borrowed $50 million
under the Transamerica Credit and paid, prior to maturity, principal and
interest amounts then outstanding under an existing credit facility. As a
result, the Company expensed approximately $123,000 of deferred financing costs
associated with the other facility. This amount was included in interest expense
at December 31, 1999, as management does not consider the amount significant
enough to warrant treatment as an extraordinary item. The Company borrowed an
additional $9.4 million against the credit facility in March 2000. In July 2000,
the credit facility was amended to increase the maximum availability from $60
million to $70 million and an additional $5 million was borrowed at that time by
the Company. In September 2000, the note was modified to allow the Company to
prepay $40 million of the outstanding balance. The Company paid $200,000 in
prepayment penalties which is included in interest expense, as management does
not consider the amount significant enough to warrant treatment as an
extraordinary item.

The Transamerica Credit contains a number of representations, warranties
and covenants, the breach of which, at the election of Transamerica, would
accelerate the maturity date of the outstanding principal balance.

The more restrictive covenants include:

- Maintenance on a quarterly basis of a ratio of consolidated cash flow to
the sum of all principal and interest payments and unfinanced capital
expenditure costs during the measurement period of at least 1.2 to 1.0;

- Maintenance on an annual basis of a ratio of total liabilities to
tangible net worth not to exceed 3.0 to 1.0;

- Maintenance on an annual basis of a minimum tangible net worth of $80.0
million;

- Without written consent of Transamerica, the Company cannot conduct any
business not currently being conducted by the Company, nor liquidate,
dissolve or merge into any other entity; and

- The Company shall not pay, or authorize the payment of, any dividends on
any stock, debenture or other security without the prior written consent
of Transamerica.

F-14
52
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

7. NOTES PAYABLE -- (CONTINUED)
Five-year maturities of note payable -- Scheduled maturities of debt for
the periods subsequent to December 31, 2000, are as follows (in thousands):

<TABLE>
<S> <C>
2001........................................................ $ 4,477
2002........................................................ 4,883
2003........................................................ 4,883
2004........................................................ 4,883
2005........................................................ 4,883
Thereafter.................................................. 407
---------
Total............................................. $ 24,416
=========
</TABLE>

The estimated fair value of the Company's long-term debt obligations
approximates its related carrying value as the underlying debt agreement bears
interest based upon current market rates.

The Company maintains letters of credit in the aggregate amount of $230,289
with a bank for the benefit of an insurance company as collateral for
retrospective premiums and retained losses which could become payable under the
terms of the Company's insurance contract. These letters of credit expire in
November of each calendar year, but provide for an indefinite number of annual
extensions of the expiration date and are fully collateralized by the Company's
cash. No amounts have been drawn under the letters of credit.

8. COMMITMENTS AND CONTINGENCIES

Contingencies -- The Company's contract services and oil and natural gas
exploration and production operations are subject to inherent risks, including
blowouts, cratering, fire and explosions which could result in personal injury
or death, suspended drilling operations, damage to, or destruction of equipment,
damage to producing formations and pollution or other environmental hazards.

As a protection against these hazards, the Company maintains general
liability insurance coverage of $2.0 million per occurrence with $2.0 million of
aggregate coverage and excess liability and umbrella coverages up to $40.0
million per occurrence with a $40.0 million aggregate.

The Company believes it is adequately insured for public liability and
property damage to others with respect to its operations. However, such
insurance may not be sufficient to protect the Company against liability for all
consequences of well disasters, extensive fire damage or damage to the
environment. The Company also carries insurance to cover physical damage to, or
loss of, its rigs; however, it does not carry insurance against loss of earnings
resulting from such damage or loss. The Company's lender who has a security
interest in the drilling rigs is named as loss payee on the physical damage
insurance on such rigs.

The Company is involved in various routine litigation incident to its
business. In the Company's opinion, none of these proceedings will have a
material adverse effect on the Company's financial condition, results of
operations or liquidity.

9. STOCKHOLDERS' EQUITY

During September 2000, the Company issued 3,000,000 shares of its commons
stock at a public price of $34.50 per share. An underwriting discount of $1.50
was paid for a net price of $33.00 per share. Net proceeds from the offering
totaled approximately $98.8 million.

During June 2000, the Company issued 1,150,000 shares of its common stock
and three-year warrants to acquire an additional 127,000 shares at an exercise
price of $22.00 per share, as consideration for certain drilling equipment
acquired from an unrelated entity. The common stock was recorded at $18 per
share its fair market value on the date of purchase and the warrants were valued
at $900,000 using the Black-Scholes model.

F-15
53
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

9. STOCKHOLDERS' EQUITY -- (CONTINUED)

During March 2000, the Company issued 53,000 shares of its common stock as
consideration for certain drilling equipment acquired from an unrelated entity.
The common stock was recorded at $29.0625 per share, its fair market value on
the date of purchase.

During June 1999, the Company issued 25,776 shares of its common stock as
consideration for certain drilling equipment acquired from an unrelated entity.
The common stock was recorded at $8.0625 per share, its fair market value on the
date of purchase.

On January 27, 1999, the Company issued 800,000 shares of its common stock
as consideration for the Company's acquisition of the drilling assets of Padre
Industries, Inc. The common stock was recorded at its guaranteed value of $5.00
per share, or an aggregate purchase price of $4.0 million. On February 1, 2000,
the Company exercised its option to buy back 300,000 shares of its common stock
previously issued in conjunction with this acquisition for $5.50 per share.

During January 1998, the Company acquired the outstanding stock of Lone
Star. The purchase price consisted of $1.4 million in cash, 571,328 shares of
the Company's common stock valued at $17.41 per share, the assumption of $1.6
million of debt and approximately $3,300 of other direct costs.

10. STOCK OPTIONS AND WARRANTS

Employee Stock Incentive Plans -- In August 1993, the Company adopted the
Patterson Energy, Inc. 1993 Stock Incentive Plan (the "Stock Incentive Plan").
The purpose of the Stock Incentive Plan is to provide continuing incentives to
the Company's key employees, which may include, but shall not necessarily be
limited to, members of the Board of Directors (excluding members of the
Compensation Committee) and officers of the Company. The Stock Incentive Plan
provides for an authorization of 2.8 million shares of common stock for issuance
thereunder. Under the Stock Incentive Plan, the Company may grant to key
employees awards of stock options and restricted stock or any combination
thereof. The Company may grant both incentive stock options ("incentive stock
options") intended to qualify under Section 422 of the Internal Revenue Code of
1986, as amended, and options which are not qualified as incentive stock
options. The options become immediately exercisable in the event of a change in
control (as defined in the Stock Incentive Plan) of the Company.

Under the Stock Incentive Plan, the exercise price of incentive stock
options must be at least equal to the fair market value of the stock on date of
grant and the exercise price of non-incentive stock options may not be less than
80% of the fair market value on date of grant.

Stock options covering a total of 2.77 million shares of common stock (net
of any forfeitures and expirations as defined below) have been granted to date
under the Stock Incentive Plan. The outstanding options were variously granted
since 1995. Each of the options has a 10-year term and the exercise prices were
equal to the fair market value of the Company's common stock on the respective
grant dates. The options granted to the employees vest either (i) 20% a year,
beginning on the grant date and 20% for the next four anniversaries of the date
of grant, (ii) 11.2% a year for the first five years, beginning on the grant
date, and 22% on each of the next two anniversaries of the grant date, or (iii)
0.0% for the first year, approximately 4% for each of the next two anniversaries
and 23% on each of the next four anniversaries of the date of grant. A total of
1,032,400 options granted under the Stock Incentive Plan have been exercised,
149,700 have been forfeited and 61,200 have expired as of December 31, 2000.

Non-Employee Directors' Stock Option Plan -- In June 1995, Patterson
adopted the Non-Employee Directors' Stock Option Plan (the "Outside Directors'
Plan"). The purpose of the Outside Directors' Plan is to encourage and provide
incentive for high level performance by non-employee directors of the Company.
An

F-16
54
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

10. STOCK OPTIONS AND WARRANTS -- (CONTINUED)

aggregate of 120,000 shares of Common Stock are reserved for issuance under the
Outside Directors' Plan to directors who are not employees of the Company.

As required by the Outside Directors' Plan, the exercise price of the
options will be equal to the fair market value of the Company's common stock on
the date of grant. Outside directors are automatically granted options to
purchase 20,000 shares and an additional 4,000 shares for each subsequent year
that they serve up to a maximum of 40,000 shares per director. Each option is
exercisable one year after the date of grant and expires five years from the
date of grant. The options become immediately exercisable in the event of a
change of control (as defined in the Outside Directors' Plan) of the Company.

The table below sets forth information regarding options granted under the
Outside Directors' Plan. Each of the options are granted with an exercise price
per share equal to fair market value on the grant date. A total of 4,000 options
granted under the Outside Directors' Plan have been forfeited and 65,200 options
have been exercised as of December 31, 2000.

<TABLE>
<CAPTION>
DATE GRANTED OPTIONS GRANTED EXERCISE PRICE/SHARE
- ------------ --------------- --------------------
<S> <C> <C>
June 6, 1995......................................... 40,000 $ 2.250
June 6, 1996......................................... 8,000 4.313
July 30, 1996........................................ 20,000 4.375
June 6, 1997......................................... 8,000 10.000
July 30, 1997........................................ 4,000 15.813
June 6, 1998......................................... 8,000 11.063
July 30, 1998........................................ 4,000 7.375
June 6, 1999......................................... 8,000 8.875
July 30, 1999........................................ 4,000 9.625
June 6, 2000......................................... 4,000 22.188
July 30, 2000........................................ 4,000 24.688
November 6, 2000..................................... 40,000 28.625
---------
Total options granted...................... 152,000
=========
</TABLE>

Included in the above total are 40,000 options that have been granted to
two new directors. These options are contingent upon shareholder approval of a
Plan amendment.

F-17
55
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

10. STOCK OPTIONS AND WARRANTS -- (CONTINUED)

A summary of the status of the Company's stock options issued under the
Stock Incentive Plan and the Outside Directors' Plan as of December 31, 1998,
1999 and 2000 and the changes during each of the years then ended are presented
below (in thousands):

<TABLE>
<CAPTION>
1998 1999 2000
--------------------------- --------------------------- ---------------------------
NO. OF NO. OF NO. OF
SHARES OF WEIGHTED SHARES OF WEIGHTED SHARES OF WEIGHTED
UNDERLYING AVERAGE UNDERLYING AVERAGE UNDERLYING AVERAGE
OPTIONS EXERCISE PRICE OPTIONS EXERCISE PRICE OPTIONS EXERCISE PRICE
---------- -------------- ---------- -------------- ---------- --------------
<S> <C> <C> <C> <C> <C> <C>
Outstanding at beginning of the
year.......................... 1,130 $ 9.47 1,475 $ 10.12 2,351 $ 7.70
Granted at the money.......... 515 9.79 1,144 3.75 93 21.68
------- -------- ------- -------- ------- --------
Total granted......... 1,645 9.57 2,619 7.34 2,444 8.23
Exercised..................... 129 2.25 179 3.39 540 5.29
Forfeited..................... 30 12.47 83 5.30 40 11.38
Expired....................... 11 13.26 6 12.34 44 13.79
------- -------- ------- -------- ------- --------
Outstanding at end of year...... 1,475 $ 10.12 2,351 $ 7.70 1,820 $ 8.90
======= ======== ======= ======== ======= ========
Exercisable at end of year...... 563 $ 9.05 892 $ 9.34 732 $ 11.45
======= ======== ======= ======== ======= ========
Weighted average fair value of
options granted during the
year.......................... $ 4.99 $ 2.15 $ 15.55
======== ======== ========
</TABLE>

The following table summarizes information about stock options outstanding
at December 31, 2000:

<TABLE>
<CAPTION>
OPTIONS OUTSTANDING OPTIONS EXERCISABLE
------------------------------------------------- ------------------------------
WEIGHTED AVERAGE
NUMBER REMAINING WEIGHTED AVERAGE NUMBER WEIGHTED AVERAGE
RANGE OF EXERCISE PRICES OUTSTANDING CONTRACTED LIFE EXERCISE PRICE EXERCISABLE EXERCISE PRICES
- ------------------------ ----------- ---------------- ---------------- ----------- ----------------
<S> <C> <C> <C> <C> <C>
$1.81 to $5.00............ 794,300 7.74 $ 3.18 100,865 $ 3.32
$5.01 to $20.00........... 951,200 6.98 $ 12.37 625,680 $ 12.67
$20.01 to $28.63.......... 74,000 6.47 $ 25.78 5,200 $ 22.13
----------- ------ -------- --------- --------
1,819,500 7.29 $ 8.90 731,745 $ 11.45
=========== ====== ======== ========= ========
</TABLE>

Public Relations Services Stock Options -- In June 1999, the Company issued
options covering a total of 50,000 shares of common stock at an exercise price
of $8.0625 per share to a consultant as partial compensation for public
relations services rendered to the Company. The options granted to the
consultant have an exercise price equal to the fair market value of the stock at
date of grant. The options were fully exercisable upon grant date. The Company
accounted for the option grant in accordance with SFAS No. 123, and as such, a
charge for stock compensation expense of $250,000, which represents the fair
value of the options on the date of grant, is included in general and
administrative expenses for the year ended December 31, 1999. All such options
were exercised in 2000.

F-18
56
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

10. STOCK OPTIONS AND WARRANTS -- (CONTINUED)

Pro Forma Stock-Based Compensation Disclosure -- Had the compensation cost
for the Company's stock-based compensation plan been determined consistent with
SFAS No. 123, the Company's net income (loss) and net income (loss) per common
share for 1998, 1999 and 2000 would approximate the pro forma amounts below:

<TABLE>
<CAPTION>
DECEMBER 31, 1998 DECEMBER 31, 1999 DECEMBER 31, 2000
-------------------- ------------------------ -----------------------
AS PRO PRO PRO
REPORTED FORMA AS REPORTED FORMA AS REPORTED FORMA
-------- ----- ----------- ----- ----------- -----
<S> <C> <C> <C> <C> <C> <C>
SFAS No. 123 charge net
of income tax......... $ -- $ 1,817 $ -- $ 2,178 $ -- $ 2,026
APB 25 charge........... -- -- -- -- -- --
Net income (loss)....... (325) (2,142) (9,127) (11,305) 23,755 21,729
======== ========= ========= ========== ========= =========
Net income (loss) per
common share:
Basic................. $ (0.01) $ (0.07) $ (0.28) $ (0.35) $ 0.69 $ 0.63
======== ========= ========= ========== ========= =========
Diluted............... $ (0.01) $ (0.07) $ (0.28) $ (0.35) $ 0.66 $ 0.61
======== ========= ========= ========== ========= =========
</TABLE>

The fair value of each stock option granted is estimated on the date of
grant using the Black-Scholes option-pricing model with the following
weighted-average assumptions for grants in 1995, 1996, 1997, 1998, 1999, and
2000 respectively; dividend yield of 0.00%; risk-free interest rates are
different for each grant and range from 4.88% to 7.02%; the expected term is 5
years; and a volatility of 38.68% for all 1995 and 1996 grants, 35.97% for all
1997 grants, 51.08% for all 1998 grants, 61.97% for all 1999 grants and 67.71%
for all 2000 grants.

The effects of applying SFAS No. 123 in this pro forma disclosure are not
indicative of future amounts. SFAS No. 123 does not apply to awards prior to
1995.

Stock Purchase Warrants -- In June 2000, the Company issued 127,000
warrants exercisable at $22 per share as partial consideration for the purchase
of eight drilling rigs and related equipment. The warrants were fully
exercisable upon date of issuance. If not exercised, the warrants will expire on
June 2, 2003.

F-19
57
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

10. STOCK OPTIONS AND WARRANTS -- (CONTINUED)

Tabular Summary -- The following table summarizes information regarding the
Company's stock options and warrants granted under the provisions of the
aforementioned plans: as well as stock options and warrants issued pursuant to
certain transactions described in Notes 2 and 9:

<TABLE>
<CAPTION>
WEIGHTED AVERAGE
SHARES EXERCISE PRICE
------ ----------------
<S> <C> <C>
GRANTED
1998.................................................... 515,000 $ 9.79
1999.................................................... 1,193,800 3.93
2000.................................................... 220,200 21.87
EXERCISED
1998.................................................... 132,720 $ 2.31
1999.................................................... 178,770 3.39
2000.................................................... 540,310 5.29
SURRENDERED
1998.................................................... 43,568 $ 12.10
1999.................................................... 89,800 5.80
2000.................................................... 83,900 12.64
OUTSTANDING AT YEAR END
1998.................................................... 1,483,568 $ 10.08
1999.................................................... 2,408,798 7.69
2000.................................................... 1,946,500 9.76
EXERCISABLE AT YEAR END
1998.................................................... 573,936 $ 8.96
1999.................................................... 949,958 9.21
2000.................................................... 858,745 13.01
</TABLE>

11. LEASES

The Company incurred rent expense, consisting primarily of daily rental
charges for the use of drilling equipment, of $4.3 million, $2.5 million and
$1.8 million, for the periods ended December 31, 1998, 1999 and 2000,
respectively. The Company's obligations under non-cancelable operating lease
agreements are not material to the Company's operations.

12. INCOME TAXES

Components of the income tax provision applicable for federal and state
income taxes are as follows (in thousands):

<TABLE>
<CAPTION>
1998 1999 2000
---- ---- ----
<S> <C> <C> <C>
Federal income tax expense (benefit):
Current......................................... $ (6,358) $ 2,767 $ (1,731)
Deferred........................................ 6,451 (7,108) 15,496
--------- --------- ---------
93 (4,341) 13,765
State income tax expense:
Current......................................... -- -- 34
Deferred........................................ -- -- 445
--------- --------- ---------
Total income tax expense (benefit)................ $ 93 $ (4,341) $ 14,244
========= ========= =========
</TABLE>

F-20
58
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

12. INCOME TAXES -- (CONTINUED)

The difference between the statutory federal income tax rate and the
effective income tax rate is summarized as follows:

<TABLE>
<CAPTION>
1998 1999 2000
---- ---- ----
<S> <C> <C> <C>
Statutory tax rate......................................... (34.0)% (34.0)% 35.0%
State income taxes......................................... -- -- 1.1
Non-amortizable goodwill................................... 102.8 2.2 0.9
Non-deductible expenses.................................... 12.8 0.3 0.3
Statutory depletion in excess of basis..................... (44.3) (0.8) (0.4)
Other, net................................................. 2.8 0.1 0.6
----- ----- ----
Effective tax rate......................................... 40.1% (32.2)% 37.5%
===== ===== ====
</TABLE>

In assessing the realizability of deferred tax assets, management considers
whether it is more likely than not that some portion or all of the deferred tax
assets will not be realized. The ultimate realization of deferred tax assets is
dependent upon the generation of future taxable income during the periods in
which those temporary differences become deductible. Management considers the
scheduled reversal of deferred tax liabilities, projected future taxable income,
and tax planning strategies in making this assessment. The Company expects the
deferred tax assets at December 31, 2000 to be realized as a result of the
reversal during the carryforward period of existing taxable temporary
differences giving rise to deferred tax liabilities and the generation of
taxable income in the carryforward period; therefore, no valuation allowance is
necessary.

The tax effect of significant temporary differences representing deferred
tax assets and liabilities and changes therein were as follows (in thousands):

<TABLE>
<CAPTION>
JANUARY 1, NET DECEMBER 31, NET DECEMBER 31, DECEMBER 31,
1998 CHANGE 1998 CHANGE 1999 NET CHANGE 2000
---------- --------- ------------ --------- ------------ ---------- ------------
<S> <C> <C> <C> <C> <C> <C> <C>
Deferred tax assets:
Net operating loss
carryforwards.................. $ 1,216 $ 218 $ 1,434 $ 10,294 $ 11,728 $ (5,878) $ 5,850
Investment tax credit
carryforwards.................. 375 -- 375 -- 375 94 469
AMT credit carryforwards........... 282 -- 282 2,933 3,215 (1,597) 1,618
Depletion carryforwards............ -- -- -- -- -- -- --
Other.............................. 1,050 78 1,128 23 1,151 45 1,196
--------- --------- ---------- --------- ---------- ---------- ----------
2,923 296 3,219 13,250 16,469 (7,336) 9,133
Valuation allowance................ -- -- -- -- -- -- --
--------- --------- ---------- --------- ---------- ---------- ----------
Deferred tax assets.............. 2,923 296 3,219 13,250 16,469 (7,336) 9,133
Deferred tax liabilities:
Property and equipment basis
difference................... (3,882) (7,335) (11,217) (5,976) (17,193) (12,890) (30,083)
--------- --------- ---------- --------- ---------- ---------- ----------
Net deferred tax
liability................ $ (959) $ (7,039) $ (7,998) $ 7,274 $ (724) $ (20,226) $ (20,950)
========= ========= ========== ========= ========== ========== ==========
</TABLE>

For tax return purposes, the Company had tax NOL carryforwards of
approximately $16.3 million at December 31, 2000. If unused, the aforementioned
tax NOL carryforwards will expire in 2019. The Company also had available, at
December 31, 2000, $1.6 million of alternative minimum tax credits, which may be
carried forward indefinitely.

13. EMPLOYEE BENEFITS

Effective January 1, 1992, the Company established a 401(k) profit sharing
plan for all eligible employees. Company contributions are discretionary. The
Company made no contribution in 1998 or 1999 and incurred $783,000 of expense in
2000 for a matching contribution.

F-21
59
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

14. BUSINESS SEGMENTS

The Company conducts its business through three distinct operating
activities: contract drilling of oil and natural gas wells, oil and natural gas
exploration, development, acquisition and production and, to a lesser degree,
providing drilling fluid services to operators in the oil and natural gas
industry.

Contract Drilling Services. The Company markets its contract drilling
services to major oil companies and independent oil and natural gas producers.
The Company owns 131 drilling rigs, 124 of which are operable at December 31,
2000. Currently, 88 of the operable drilling rigs are based in Texas (47 in West
Texas, 26 in South Texas, 11 in East Texas and four in North Texas), 20 are
based in Southeast New Mexico, and four each in Oklahoma, Louisiana, Utah and
Mississippi. The drilling rigs have rated maximum depth capabilities ranging
from 8,000 feet to 25,000 feet.

Oil and Natural Gas Operations. The Company has been engaged in the
development, exploration, acquisition and production of oil and natural gas
since 1982. The Company's oil and natural gas activities are designed to
complement its land drilling operations and diversify the Company's overall
business strategy. These activities are primarily focused in mature producing
regions in the Permian Basin and South Texas. Oil and natural gas operations
comprised approximately 5% of the Company's consolidated operating revenues for
the year ended December 31, 2000. The Company's business strategy for its oil
and natural gas operations is to increase its oil and natural gas reserves
primarily through developmental and exploratory drilling in producing areas. At
December 31, 2000, the Company's proved developed reserves were approximately
1.8 million BOE and had a present value (discounted at 10% before income taxes)
of estimated future net revenues of approximately $22.8 million. (See Note 19
Supplementary Oil and Natural Gas Reserve Information and Related Data).

Drilling and Completion Fluids Services. The Company provides contract
drilling and completion fluids services to numerous operators in the oil and
natural gas industry. Operating revenues derived from these activities
constitute approximately 10% of the Company's consolidated operating revenues
for the year ended December 31, 2000. Patterson believes that these contract
services integrate well with its other core operating activities. The drilling
fluids operations were added by the Company during 1998 with its acquisitions of
Lone Star Mud, Inc. and Tejas Drilling Fluids, Inc. and have operations in
Texas, New Mexico, Oklahoma and Colorado. The scope of the Company's drilling
fluids services was expanded to include completion fluids services by the
purchase of the drilling and completion fluids division of Ambar, Inc. in
October 2000 which has operations in the coastal areas of Texas, Louisiana and
in the Gulf of Mexico. Since the addition of Ambar, its revenues have comprised
of 37% of the total drilling fluids revenues for the year.

F-22
60
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

14. BUSINESS SEGMENTS -- (CONTINUED)

<TABLE>
<CAPTION>
DECEMBER 31,
------------------------------------
1998 1999 2000
---- ---- ----
<S> <C> <C> <C>
Revenues:
Contract drilling.................................... $ 165,997 $ 131,287 $ 260,233
Oil and natural gas.................................. 7,170 8,563 15,615
Drilling and completion fluids....................... 13,397 11,686 32,053
---------- ---------- ----------
Total revenues......................................... $ 186,564 $ 151,536 $ 307,901
========== ========== ==========
Income (loss) from operations:
Contract drilling.................................... $ 9,329 $ (10,283) $ 36,933
Oil and natural gas.................................. (6,217) 1,874 5,614
Drilling fluids...................................... 360 (1,403) (550)
---------- ---------- ----------
3,472 (9,812) 41,997
Interest income...................................... 767 445 999
Interest expense..................................... (4,471) (4,101) (4,997)
---------- ---------- ----------
Income (loss) before income taxes.................... $ (232) $ (13,468) $ 37,999
========== ========== ==========
Identifiable assets:
Contract drilling.................................... $ 185,237 $ 190,617 $ 265,747
Oil and natural gas.................................. 15,411 18,386 21,232
Drilling fluids...................................... 20,063 19,117 52,414
Corporate(a)......................................... 15,894 8,137 71,193
---------- ---------- ----------
Total assets........................................... $ 236,605 $ 236,257 $ 410,586
========== ========== ==========
Depreciation, depletion and amortization:
Contract drilling.................................... $ 22,416 $ 24,417 $ 28,066
Oil and natural gas.................................. 4,780 2,674 3,601
Drilling fluids...................................... 895 1,065 1,466
---------- ---------- ----------
Total depreciation, depletion and amortization......... $ 28,091 $ 28,156 $ 33,133
========== ========== ==========
Capital expenditures:
Contract drilling.................................... $ 67,471 $ 17,917 $ 82,593
Oil and natural gas.................................. 7,734 5,260 5,341
Drilling fluids...................................... 4,396 195 10,166
---------- ---------- ----------
Total capital expenditures............................. $ 79,601 $ 23,372 $ 98,100
========== ========== ==========
</TABLE>

- ---------------

(a) Corporate assets primarily include cash on hand managed by the parent
corporation and certain deferred Federal income tax assets.

F-23
61
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

15. SELECTED QUARTERLY FINANCIAL RESULTS (UNAUDITED)

Quarterly financial information for the three years ended December 31, 2000
is as follows:

<TABLE>
<CAPTION>
1ST QUARTER 2ND QUARTER 3RD QUARTER 4TH QUARTER TOTAL
----------- ----------- ----------- ----------- -----
<S> <C> <C> <C> <C> <C>
2000
Operating revenues............... $ 58,566 $ 67,139 $ 78,628 $ 103,568 $ 307,901
Operating income (loss).......... 2,471 7,215 12,136 19,901 41,723
Net income (loss)................ 911 3,808 6,749 12,287 23,755
Earnings per share:
Basic............................ $ 0.03 $ 0.12 $ 0.20 $ 0.34 $ 0.69
Diluted.......................... $ 0.03 $ 0.11 $ 0.19 $ 0.33 $ 0.66
1999
Operating revenues............... $ 26,738 $ 30,544 $ 39,812 $ 54,442 $ 151,536
Operating income (loss).......... (4,871) (3,709) (2,704) 1,157 (10,127)
Net income (loss)................ (3,863) (3,142) (2,354) 232 (9,127)
Earnings per share:
Basic............................ $ (0.12) $ (0.10) $ (0.07) $ 0.01 $ (0.28)
Diluted.......................... $ (0.12) $ (0.10) $ (0.07) $ 0.01 $ (0.28)
1998
Operating revenues............... $ 60,751 $ 51,150 $ 42,258 $ 32,405 $ 186,564
Operating income (loss).......... 7,861 3,531 (252) (8,515) 2,625
Net income (loss)................ 4,533 1,721 (529) (6,050) (325)
Earnings per share:
Basic............................ $ 0.14 $ 0.05 $ (0.02) $ (0.18) $ (0.01)
Diluted.......................... $ 0.14 $ 0.05 $ (0.02) $ (0.18) $ (0.01)
</TABLE>

16. CONCENTRATIONS OF CREDIT RISK

Financial instruments, which potentially subject the Company to
concentrations of credit risk, consist primarily of demand deposits, temporary
cash investments and trade receivables.

The Company believes that it places its demand deposits and temporary cash
investments with high credit quality financial institutions. At December 31,
1999 and 2000, the Company's demand deposits and temporary cash investments
consisted of the following (in thousands):

<TABLE>
<CAPTION>
1999 2000
---- ----
<S> <C> <C>
Deposit in FDIC and SIPC-insured institutions under $100,000
and cash on hand.......................................... $ 1,361 $ 1,653
Deposit in FDIC and SIPC-insured institutions over $100,000
and cash on hand.......................................... 11,146 69,376
--------- ----------
12,507 71,029
Less outstanding checks and other reconciling items......... (3,715) (11,674)
--------- ----------
Cash and cash equivalents................................... $ 8,792 $ 59,355
========= ==========
</TABLE>

Concentrations of credit risk with respect to trade receivables are
primarily focused on companies involved in the exploration and development of
oil and natural gas properties. The concentration is somewhat mitigated by the
diversification of customers for which the Company provides drilling services.
As is general industry practice, the Company does not require customers to
provide collateral. No significant losses from individual contracts were
experienced during the years ended December 31, 1998, 1999 and 2000. Included in

F-24
62
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

16. CONCENTRATIONS OF CREDIT RISK -- (CONTINUED)

general and administrative expense for the periods ended December 31, 1998, 1999
and 2000 are provisions for doubtful receivables of $90,000, $0 and $570,000,
respectively.

The carrying values of cash and cash equivalents, marketable securities and
trade receivables approximate fair value due to the short-term maturity of these
assets.

17. RELATED PARTY TRANSACTIONS

Use of Assets -- The Company leases a 1981 Beech King-Air 90 airplane owned
by an affiliate of the Company's Chairman of the Board/Chief Executive Officer.
Under the terms of the lease, the Company pays a monthly rental of $9,200 and
its proportionate share of the costs of fuel, insurance, taxes and maintenance
of the aircraft. The Company paid approximately $211,495, $222,583 and $193,769
for the lease of the airplane during 1998, 1999 and 2000, respectively.

Contract Drilling Services -- The Company provided contract drilling
services to an affiliated company during 1999 with related revenues of
approximately $275,642.

Sales of Oil -- An affiliate acted as the first purchaser of oil produced
from leases operated by the Company during 1998 and 1999. Sales of oil to that
entity, both royalty and working interest (including the Company) were
approximately $8.1 million and $8.4 million for 1998 and 1999, respectively.
There were no sales of oil to that entity in 2000.

Joint Operation of Oil and Natural Gas Properties -- The Company operates
certain oil and natural gas properties in which the Chairman of the Board/Chief
Executive Officer, the President/Chief Operating Officer and other persons or
entities related to the Company purchased a joint interest ownership with the
Company and other industry partners. The Company made oil and natural gas
production payments (net of royalty) of $10.5 million, $6.1 million and $13.4
million from these properties in 1998, 1999 and 2000, respectively, to the
aforementioned persons or entities. These persons or entities reimbursed the
Company for joint operating costs of $7.4 million, $5.9 million and $8.0 million
in 1998, 1999 and 2000, respectively.

18. SUBSEQUENT EVENTS

On January 5, 2001, the Company consummated The Agreement and Plan of
Merger among Patterson Energy, Inc., Patterson Drilling Company LP, LLLP
("Patterson Drilling") and Jones Drilling Corporation and certain Asset Purchase
Agreements between Patterson Drilling and Henderson Welding, Inc., L.E.J. Truck
and Crane, Inc., and L.E. Jones Drilling Company. The acquired assets consist of
21 drilling rigs and related equipment. The purchase price of $36.2 million
consisted of 810,070 shares of Patterson's common stock valued at $26.8125 per
share and $10.9 million cash, net of certain working capital adjustments.

On February 5, 2001, the Company announced that its Board of Directors
along with the Board of Directors of UTI Energy Corp., approved a merger of the
two companies. According to the terms of the merger agreement between the
Company and UTI, shareholders of UTI will receive one share of Patterson common
stock for each share of UTI common stock and Patterson will assume UTI's
outstanding options and warrants. The board of directors of the new company will
consist of eleven directors, six of which will be selected by Patterson and five
of which would be selected by UTI. Although the merger agreement does not
specify who will be the officers of the new company, management of the Company
understands that Mark S. Siegel, UTI's Chairman of the Board, would be the
Chairman of the Board and Cloyce A. Talbott, Patterson's Chairman of the Board
and Chief Executive Officer, would be Chief Executive Officer. The combined
company will be the second largest United States land-based drilling service
contractor with 302 drilling rigs and will be called "Patterson-UTI Energy,
Inc."

F-25
63
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

18. SUBSEQUENT EVENTS -- (CONTINUED)

Under the terms of the merger agreement, both the Company and UTI have
agreed not to solicit competing offers, but the boards of directors of each
company are free to consider and accept an unsolicited offer if, based on advice
of counsel, it believes it must do so in the exercise of its fiduciary duty. In
the event a party accepts an unsolicited offer, or its board of directors
withdraws its recommendation in light of an unsolicited offer, or the
shareholders do not vote to approve the merger because of an unsolicited offer,
the other party would be entitled to receive a breakup fee of $32.5 million plus
reimbursement of expenses of up to $2.5 million. In the event the shareholders
of one party do not vote to approve the merger and the other party is not in
default and is ready, willing and able to perform its agreement, the party whose
shareholders vote against the merger will be required to pay to the other party
$2.5 million, plus up to an additional $2.5 million in expenses.

The merger is subject to customary conditions to closing, including
approval by the shareholders of both companies, as well as any necessary
regulatory filings and approvals, such as the anti-trust provisions of the
Hart-Scott-Rodino Act. There can be no assurance that the merger will be
consummated in accordance with the terms of the merger agreement, if at all.

19. SUPPLEMENTARY OIL AND NATURAL GAS RESERVE INFORMATION AND RELATED DATA
(UNAUDITED)

OIL AND GAS EXPENDITURES AND CAPITALIZED COSTS

Gross oil and natural gas expenditures by the Company for the years ended
December 31, 1998, 1999 and 2000 are summarized below (in thousands):

<TABLE>
<CAPTION>
DECEMBER 31,
-------------------------------
1998 1999 2000
---- ---- ----
<S> <C> <C> <C>
Property acquisition costs.......................... $ 1,585 $ 2,185 $ 798
Exploration costs................................... 6,510 7,178 5,401
Development costs................................... 1,126 2,061 1,012
-------- --------- --------
$ 9,221 $ 11,424 $ 7,211
======== ========= ========
</TABLE>

The aggregate amount of capitalized costs of oil and natural gas properties
as of December 31, 1999 and 2000 is comprised of the following (in thousands):

<TABLE>
<CAPTION>
DECEMBER 31,
---------------------
1999 2000
---- ----
<S> <C> <C>
Proved properties........................................... $ 32,962 $ 37,646
Accumulated depreciation, depletion and amortization........ (24,893) (28,338)
--------- ---------
Net proved properties....................................... $ 8,069 $ 9,308
========= =========
</TABLE>

F-26
64
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

19. SUPPLEMENTARY OIL AND NATURAL GAS RESERVE INFORMATION AND RELATED DATA
(UNAUDITED) -- (CONTINUED)

The following table sets forth information with respect to quantities of
net proved developed oil and natural gas reserves and changes in those reserves
for the years ended December 31, 1998, 1999 and 2000. The quantities were
estimated by an independent petroleum engineer. The Company's proved developed
oil and natural gas reserves are located entirely within the United States.

RESULTS OF OPERATIONS FOR OIL AND NATURAL GAS PRODUCING ACTIVITIES

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
--------------------------------
1998 1999 2000
---- ---- ----
(IN THOUSANDS)
<S> <C> <C> <C>
Oil and natural gas sales................................... $ 5,641 $ 6,834 $ 13,619
Gain on sale of oil and natural gas properties.............. 68 9 4
--------- -------- ---------
5,709 6,843 13,623
--------- -------- ---------
Costs and expenses:
Lease operating and production costs...................... 1,924 1,720 3,245
Exploration costs including dry holes and abandonments.... 1,752 780 1,627
Depreciation, depletion and amortization.................. 4,780 2,674 3,601
Impairment of oil and natural gas properties.............. 3,816 275 --
Income tax expense (benefit).............................. (2,231) 533 1,752
--------- -------- ---------
10,041 5,982 10,225
--------- -------- ---------
Results of operations for oil and natural gas producing
activities................................................ $ (4,332) $ 861 $ 3,398
========= ======== =========
</TABLE>

ESTIMATES OF RESERVES AND PRODUCTION PERFORMANCE ARE SUBJECTIVE AND MAY
CHANGE MATERIALLY AS ACTUAL PRODUCTION INFORMATION BECOMES AVAILABLE.

OIL AND NATURAL GAS RESERVE QUANTITIES

<TABLE>
<CAPTION>
OIL (BBLS) GAS (MCF)
---------- ---------
(IN THOUSANDS)
<S> <C> <C>
Estimated quantity, January 1, 1998......................... 945 3,788
Revision in previous estimates.............................. 140 (596)
Extensions, discoveries and other additions................. 146 1,100
Sales of reserves-in-place.................................. (1) (7)
Production.................................................. (284) (795)
------- --------
Estimated quantity, January 1, 1999......................... 946 3,490
Revision in previous estimates.............................. (169) 287
Extensions, discoveries and other additions................. 683 1,358
Production.................................................. (255) (1,017)
------- --------
Estimated quantity, January 1, 2000......................... 1,205 4,118
Revision in previous estimates.............................. 61 (157)
Extensions, discoveries and other additions................. 134 1,303
Production.................................................. (275) (1,384)
------- --------
Estimated quantity, January 1, 2001......................... 1,129 3,880
======= ========
</TABLE>

F-27
65
PATTERSON ENERGY, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

19. SUPPLEMENTARY OIL AND NATURAL GAS RESERVE INFORMATION AND RELATED DATA
(UNAUDITED) -- (CONTINUED)
STANDARDIZED MEASURE OF FUTURE NET CASH FLOWS OF PROVED DEVELOPED OIL AND
NATURAL GAS RESERVES, DISCOUNTED AT 10% PER ANNUM

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
-----------------------------------
1998 1999 2000
---- ---- ----
(IN THOUSANDS)
<S> <C> <C> <C>
Future gross revenues..................................... $ 16,451 $ 39,024 $ 48,161
Future development and production costs................... (7,219) (14,283) (16,270)
Future income tax expense(a).............................. (1,929) (7,392) (8,617)
--------- ---------- ----------
Future net cash flows..................................... 7,303 17,349 23,274
Discount at 10% per annum................................. (1,953) (5,267) (6,634)
--------- ---------- ----------
Standardized measure of discounted future net cash
flows................................................... $ 5,350 $ 12,082 $ 16,640
========= ========== ==========
</TABLE>

- ---------------

(a) Future income taxes are computed by applying the statutory tax rate to
future net cash flows less the tax basis of the properties and net
operating loss attributable to oil and gas operations and investment tax
credit carryforwards as of year-end; statutory depletion and tax credits
applicable to future oil and gas-producing activities are also considered
in the income tax computation.

CHANGES IN THE STANDARDIZED MEASURE OF NET CASH FLOWS OF PROVED DEVELOPED OIL
AND GAS RESERVES DISCOUNTED AT 10% PER ANNUM

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
-------------------------------
1998 1999 2000
---- ---- ----
(IN THOUSANDS)
<S> <C> <C> <C>
Standardized measure at beginning of year................... $ 8,623 $ 5,350 $ 12,082
Sales and transfers of oil and gas produced, net of
production costs.......................................... (2,773) (3,696) (7,982)
Net changes in sales price and future production and
development costs......................................... (5,056) 3,177 5,819
Extensions, discoveries and improved recovery, less related
costs..................................................... 3,018 3,711 4,064
Sales of minerals-in-place.................................. (9) -- --
Revision of previous quantity estimates..................... (804) 6,872 1,255
Accretion of discount....................................... 1,193 709 1,873
Changes in production rates and other....................... (224) 1,614 (2,435)
Net change in income taxes.................................. 1,382 (5,655) 1,964
------- --------- ---------
Standardized measure at end of year......................... $ 5,350 $ 12,082 $ 16,640
======= ========= =========
</TABLE>

F-28
66

PATTERSON ENERGY, INC.

SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS

<TABLE>
<CAPTION>
ADDITIONS(1)
------------------------
CHARGED TO ACQUIRED
BEGINNING COSTS AND THROUGH ENDING
DESCRIPTION BALANCE EXPENSES ACQUISITION DEDUCTIONS(2) BALANCE
----------- --------- ---------- ----------- ------------- -------
<S> <C> <C> <C> <C> <C>
YEAR ENDED DECEMBER 31, 2000
Deducted from asset accounts:
Allowance for doubtful accounts....... $365 $570 $800 $232 $1,503
YEAR ENDED DECEMBER 31, 1999
Deducted from asset accounts:
Allowance for doubtful accounts....... $418 $(38) $ -- $ 15 $ 365
YEAR ENDED DECEMBER 31, 1998
Deducted from asset accounts:
Allowance for doubtful accounts....... $378 $ 90 $ -- $ 50 $ 418
</TABLE>

- ---------------

(1) Net of recoveries.

(2) Uncollectible accounts written off.

S-1
67

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, Patterson Energy, Inc. has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.

PATTERSON ENERGY, INC.

Date: March 1, 2001 By: /s/ CLOYCE A. TALBOTT
------------------------------------
Cloyce A. Talbott
Chairman of the Board and Chief
Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed by the following persons on behalf of Patterson Energy,
Inc. and in the capacities indicated as of March 1, 2000.

<TABLE>
<CAPTION>
SIGNATURE TITLE
--------- -----
<C> <S>

/s/ CLOYCE A. TALBOTT Chairman of the Board, Chief Executive
- -------------------------------------------------------- Officer and Director
Cloyce A. Talbott
(Principal Executive Officer)

/s/ A. GLENN PATTERSON President, Chief Operating Officer and
- -------------------------------------------------------- Director
A. Glenn Patterson

/s/ JONATHAN D. NELSON Vice President -- Finance, Chief
- -------------------------------------------------------- Financial Officer, Secretary and
Jonathan D. Nelson Treasurer
(Principal Accounting Officer)

/s/ ROBERT C. GIST Director
- --------------------------------------------------------
Robert C. Gist

/s/ SPENCER D. ARMOUR, III Director
- --------------------------------------------------------
Spencer D. Armour, III

/s/ VINCENT A. ROSSI, JR. Director
- --------------------------------------------------------
Vincent A. Rossi, Jr.

/s/ KENNETH R. PEAK Director
- --------------------------------------------------------
Kenneth R. Peak

/s/ STEPHEN J. DEGROAT Director
- --------------------------------------------------------
Stephen J. DeGroat
</TABLE>
68

EXHIBIT INDEX

<TABLE>
<CAPTION>
EXHIBIT
NUMBER DESCRIPTION OF EXHIBIT
------- ----------------------
<C> <S>
2.1 Plan and Agreement of Merger dated October 14, 1993, between
Patterson Energy, Inc., a Texas corporation, and Patterson
Energy, Inc., a Delaware corporation, together with related
Certificates of Merger.(1)
2.2 Agreement and Plan of Merger, dated April 22, 1996 among
Patterson Energy, Inc., Patterson Drilling Company and
Tucker Drilling Company, Inc.(2)
2.2.1 Amendment to Agreement and Plan of Merger, dated May 16,
1996 among Patterson Energy, Inc., Patterson Drilling
Company and Tucker Drilling Company, Inc.(3)
2.3 Stock Purchase Agreement, dated January 5, 1998, among
Patterson Energy, Inc., Spencer D. Armour, III. And Richard
G. Price.(16)
2.4 Stock Purchase Agreement, dated September 17, 1998, among
Lone Star Mud, Inc. and Mark Campbell (shareholder of Tejas
Drilling Fluids, Inc.).(4)
2.5 Asset Purchase Agreement dated as of September 30, 2000
between Ambar Drilling Fluids LP, LLLP and Ambar, Inc.(5)
2.6 Agreement and Plan of Merger, dated February 4, 2001, by and
between UTI Energy Corp. and Patterson Energy, Inc.
Disclosure schedules for each of the parties to the merger
agreement setting forth exceptions or other information
relating to their respective representations and warrants in
the agreement have not been filed with this exhibit. They
will, however, be made available supplementally to the SEC
upon request.(6)
3.1 Restated Certificate of Incorporation.(7)
3.1.1 Certificate of Amendment to the Certificate of
Incorporation.(8)
3.2 Bylaws.(1)
3.3 Rights Agreement dated January 2, 1997, between Patterson
Energy, Inc. and Continental Stock Transfer & Trust
Company.(15)
4.1 Excerpt from Restated Certificate of Incorporation of
Patterson Energy, Inc. regarding authorized Common Stock and
Preferred Stock.(9)
10.1 Loan and Security Agreement dated December 21, 1999 among
Patterson Drilling Company and Transamerica Equipment
Financial Services Corporation.(17)
10.1.1 Promissory Note dated December 21, 1999 between Patterson
Drilling Company and Transamerica Equipment Financial
Services Corporation.(17)
10.1.2 Corporate Guarantees of Lone Star Mud, Inc. and Patterson
Energy, Inc.(17)
10.2 Aircraft Lease, dated December 20, 2000, (effective January
1, 2001) between Talbott Aviation, Inc. and Patterson
Energy, Inc.
10.3 Participation Agreement, dated October 19, 1994, between
Patterson Petroleum Trading Company, Inc. and BHT Marketing,
Inc.(10)
10.3.1 Participation Agreement dated October 24, 1995, between
Patterson Petroleum Trading Company, Inc. and BHT Marketing,
Inc.(11)
10.4 Crude Oil Purchase Contract, dated October 19, 1994, between
Patterson Petroleum, Inc. and BHT Marketing, Inc.(10)
10.4.1 Crude Oil Purchase Contract, dated October 24, 1995, between
Patterson Petroleum, Inc. and BHT Marketing, Inc.(11)
10.5 Patterson Energy, Inc. 1993 Stock Incentive Plan, as
amended.(12)
10.6 Patterson Energy, Inc. Non-Employee Directors' Stock Option
Plan, as amended.(13)
</TABLE>
69

<TABLE>
<CAPTION>
EXHIBIT
NUMBER DESCRIPTION OF EXHIBIT
------- ----------------------
<C> <S>
10.7 Model Form Operating Agreement.(14)
10.8 Form of Drilling Bid Proposal and Footage Drilling
Contract.(14)
10.9 Form of Turnkey Drilling Agreement.(14)
21.1 Subsidiaries of the registrant.
23.1 Consent of Independent Accountants -- PricewaterhouseCoopers
LLP.
23.2 Consent of Independent Petroleum Engineer -- M. Brian
Wallace, P.E.
</TABLE>

- ---------------

(1) Incorporated herein by reference to Item 27, "Exhibits" to Amendment No. 2
to Registration Statement on Form SB-2 (File No. 33-68058-FW); filed
October 28, 1993.

(2) Incorporated by reference to Item 7, "Financial Statements and Exhibits" to
Form 8-K dated April 22, 1996 and filed on April 30, 1996.

(3) Incorporated by reference to Item 7, "Financial Statements and Exhibits" to
Form 8-K dated May 16, 1996 and filed on May 22, 1996.

(4) Incorporated by reference to Item 14, "Financial Statements Schedules and
Reports on Form 8-K" to Form 10-K for the year ended December 31, 1998.

(5) Incorporated by reference to Item 7, "Financial Statements and Exhibits" to
Form 8-K dated October 3, 2000 and filed on November 6, 2000.

(6) Incorporated herein by reference to Item 7, "Financial Statements and
Exhibits" to Form 8-K dated February 4, 2001 and filed February 16, 2001.

(7) Incorporated herein by reference to Item 6, "Exhibits and Reports on Form
8-K" to Form 10-Q for the quarterly period ended June 30, 1996; filed
August 12, 1996.

(8) Incorporated herein by reference to Item 6. "Exhibits and Reports on Form
8-K" to Form 10-Q for the quarterly period ended June 30, 1997; filed
August 14, 1997.

(9) Incorporated herein by reference to Item 16, "Exhibits" to Registration
Statement on Form S-3 filed on December 18, 1996.

(10) Incorporated herein by reference to Item 27, "Exhibits" to Post Effective
Amendment No. 1 to Registration Statement on Form SB-2 (File No.
33-68058-FW); filed on June 21, 1995.

(11) Incorporated by reference to Item 13, "Exhibits and Reports on Form 8-K to
Form 10-KSB for the year ended December 31, 1995.

(12) Incorporated herein by reference to Item 8, "Exhibits" to Registration
Statement on Form S-8 (File No. 333-47917); filed March 13, 1998.

(13) Incorporated herein by reference to Item 8, "Exhibits" to Registration
Statement on Form S-8 (File No. 33-39471); filed November 4, 1997.

(14) Incorporated by reference to Item 27, "Exhibits" to Registration Statement
on Form SB-2 (File No. 33-68058-FW); filed with the Securities and Exchange
Commission on August 30, 1993.

(15) Incorporated by reference to Item 2, "Exhibits" to Registration Statement
on Form 8-A filed on January 14, 1997.

(16) Incorporated herein by reference to Item 16, "Exhibits" to Registration
Statement on Form S-3 filed on January 5, 1998.

(17) Incorporated by reference to Item 14, "Exhibits, Financial Statement
Schedules and Reports on Form 8-K" to Form 10-K for the year ended December
31, 1999.