PATTERSON ENERGY INC
8-K/A, 1997-08-12
DRILLING OIL & GAS WELLS
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<PAGE>   1
- --------------------------------------------------------------------------------
                                 
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                  FORM 8-K/A
                                AMENDMENT NO. 1

                                CURRENT REPORT
    Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported) July 12, 1997


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


         DELAWARE                   0-22664                      75-2504748

(State or other jurisdiction      (Commission                 (I.R.S. Employer
     of incorporation)            File Number)               Identification No.)



               P.O. BOX 1416, 4510 LAMESA HIGHWAY, SNYDER, TEXAS       79550
                   (Address of principal executive offices)          (Zip Code)


                                (915) 573-1104
              Registrant's telephone number, including area code


                                   No Change
         (Former name or former address, if changed since last report.)

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

<PAGE>   2
ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS.

    (a)   Financial statements of business acquired.


                           WES-TEX DRILLING COMPANY


                             FINANCIAL STATEMENTS

                             AND AUDITOR'S REPORT


                                  YEARS ENDED

                       DECEMBER 31, 1996, 1995 AND 1994




                                       2
<PAGE>   3
                            WES-TEX DRILLING COMPANY

                                    CONTENTS



<TABLE>                                                                        
<CAPTION>
                                                                           Page
                                                                           ----
<S>                                                                        <C> 
Independent Auditor's Report                                                4  
                                                                               
Financial Statements:                                                          
                                                                               
    Statements of Assets Acquired                                           6  
                                                                               
    Statements of Direct Drilling Revenue                                      
            and Direct Operating Expenses                                   7  
                                                                               
    Notes to Financial Statements                                           8  
</TABLE>




                                      3
<PAGE>   4


                          INDEPENDENT AUDITOR'S REPORT

To the Board of Directors of
WES-TEX Drilling Company:

We have audited the accompanying statements of assets acquired of WES-TEX
Drilling Company as of December 31, 1996 and 1995, and the related statements
of direct drilling revenue and direct operating expenses for each of the three
years in the period ended December 31, 1996.  These financial statements are
the responsibility of management.  Our responsibility is to express an opinion
on these financial statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards.  Those standards 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.  An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation.  We believe that our audits provide a reasonable basis
for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the assets acquired of WES-TEX Drilling Company as of
December 31, 1996 and 1995, and its direct drilling revenue and direct
operating expenses for each of the three years in the period ended December 31,
1996, in conformity with generally accepted accounting principles.





                                        /s/ DAVIS, KINARD & CO., P. C.

Abilene, Texas,
July 7, 1997





                                      4
<PAGE>   5



                        INDEPENDENT ACCOUNTANT'S REPORT

To the Board of Directors of
WES-TEX Drilling Company:

We have reviewed the accompanying statements of assets acquired of WES-TEX
Drilling Company as of March 31, 1997 and the related statements of direct
drilling revenue and direct operating expenses for the three months ended March
31, 1997 and 1996.  These financial statements are the responsibility of the
Company's management.

We conducted our review in accordance with standards established by the
American Institute of Certified Public Accountants.  A review of interim
financial information consists principally of applying analytical procedures to
financial data and making inquiries of persons responsible for financial and
accounting matters.  It is substantially less in scope than an audit conducted
in accordance with generally accepted auditing standards, the objective of
which is the expression of an opinion regarding the financial statements taken
as a whole.  Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material modifications that should
be made to the accompanying financial statements for them to be in conformity
with generally accepted accounting principles.




                                        /s/ DAVIS, KINARD & CO., P.C.

Abilene, Texas,
July 7, 1997





                                      5
<PAGE>   6
                            WES-TEX DRILLING COMPANY

                         STATEMENTS OF ASSETS ACQUIRED

                 DECEMBER 31, 1996 AND 1995 AND MARCH 31, 1997


<TABLE>
<CAPTION>

                                                (UNAUDITED)
                                                  MARCH 31,                    DECEMBER 31,
                                                ------------        -------------------------------
                                                    1997               1996                1995
                                                ------------        -----------         -----------

<S>                                             <C>                 <C>                 <C>        
Inventory                                       $   157,473         $   244,891         $   454,426

PROPERTY AND EQUIPMENT:
            Land                                    108,703             108,703             108,703
            Drilling equipment                   19,337,554          18,683,997          18,038,841
            Radio equipment                         178,662             178,662             177,230
            Shop building and equipment             438,956             438,956             414,480
            Sonora yard                              20,849              20,849              20,849
            Transportation equipment              2,021,285           1,974,982           1,909,865
                                                -----------         -----------         -----------

Total                                            22,106,009          21,406,149          20,669,968

Less:  Accumulated depreciation                  17,726,968          17,427,031          16,586,491
                                                -----------         -----------         -----------

            Property and equipment, net           4,379,041           3,979,118           4,083,477
                                                -----------         -----------         -----------

Total assets acquired                           $ 4,536,514         $ 4,224,009         $ 4,537,903
                                                ===========         ===========         ===========


</TABLE>
















The accompanying notes are an integral 
part of this statement.



                                       6
<PAGE>   7
                           WES-TEX DRILLING COMPANY

                   STATEMENTS OF DIRECT DRILLING REVENUE AND
                           DIRECT OPERATING EXPENSES

                 YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
                AND THREE MONTHS ENDED MARCH 31, 1997 AND 1996


<TABLE>
<CAPTION>
                                                     (UNAUDITED)
                                             ---------------------------
                                                       MARCH 31,                             DECEMBER 31,
                                             ---------------------------     -------------------------------------------
                                                1997            1996            1996            1995            1994
                                                ----            ----            ----            ----            ----
<S>                                          <C>             <C>             <C>             <C>             <C>        
DIRECT DRILLING REVENUE:
   Drilling operations                       $11,792,551     $10,794,845     $47,010,631     $45,375,527     $43,048,358
   Subcontract drilling operations                                                               125,650
                                             -----------     -----------     -----------     -----------     -----------
         Total direct drilling revenue       $11,792,551     $10,794,845     $47,010,631     $45,501,177     $43,048,358
                                             -----------     -----------     -----------     -----------     -----------
DIRECT OPERATING EXPENSES:
   Direct drilling costs                      10,091,003       9,911,249      40,408,689      40,232,915      36,117,629
   Subcontract drilling costs                                                                    125,650
   Depreciation                                  345,833         397,046       1,588,186       1,561,519       1,528,747
   Allocated general and administrative          663,780         606,204       2,337,327       2,552,504       2,726,979
                                             -----------     -----------     -----------     -----------     -----------
         Total direct operating expenses      11,100,616      10,914,499      44,334,202      44,472,588      40,373,355
                                             -----------     -----------     -----------     -----------     -----------
EXCESS (DEFICIT) OF DIRECT DRILLING
   REVENUE OVER DIRECT
   OPERATING EXPENSES                        $   691,935     $  (119,654)    $ 2,676,429     $ 1,028,589     $ 2,675,003
                                             ===========     ===========     ===========     ===========     ===========
</TABLE>




The accompanying notes are an integral 
part of this statement.


                                       7
<PAGE>   8
                            WES-TEX DRILLING COMPANY

                         NOTES TO FINANCIAL STATEMENTS



Note 1:  BASIS OF PRESENTATION

         On June 4, 1997, Patterson Energy, Inc. (Patterson) entered into an
         agreement in principle to acquire from WES-TEX Drilling Company
         (Company) all of its drilling assets in exchange for 283,000 shares of
         Patterson common stock, $25,000,000 cash consideration, and stock
         warrants to purchase 200,000 shares of Patterson common stock for
         $32.00 per share. Patterson did not assume any of the Company's
         liabilities.  On June 12, 1997 Patterson and the Company entered into a
         definitive purchase agreement which specified the terms regarding the
         transfer of the consideration.

         The accompanying statements of direct drilling revenue and direct
         operating expenses only includes revenue and expenses directly
         associated with drilling operations and the general and administrative
         expenses allocated to drilling activities.  All of the Company's
         general and administrative expenses have been subject to allocation. 
         General and administrative expenses have been allocated based on
         revenues from drilling operations and oil and gas production
         activities.  Management believes that this is a reasonable basis to
         allocate general and administrative expenses and this method is
         consistent with historical financial statement presentations. 
         Investment income, interest expense and provision for income taxes, as
         well as, revenues and expenses related to oil and gas exploration and
         production have been excluded from the presentation.

         Historical financial information reflecting financial position, results
         of operations, and cash flows of the Company is not presented because
         the acquisition cost was assigned to the assets acquired, covenants not
         to compete and goodwill.  Accordingly, the historical statements of
         assets acquired and direct drilling revenues and direct operating
         expenses have been presented in lieu of the financial statements
         required under Rule 3-05 of Securities and Exchange Commission
         Regulation S-X.

         The financial statements as of March 31, 1997 and for each of the three
         months ended March 31, 1997 and 1996 have been prepared by management
         of the Company, without audit pursuant to the rules and regulations of
         the Securities and Exchange Commission. Certain information and
         footnote disclosures normally included in financial statements prepared
         in accordance with generally accepted accounting principles have been
         omitted pursuant to such rules and regulations, although the Company
         believes that the disclosures are adequate to make the information not
         misleading. These financial statements should be read in conjunction
         with the audited December 31, 1994, 1995 and 1996 financial statements.
         In the opinion of management, all adjustments considered necessary for
         presentation have been included.


         The results of operations for the three months ended March 31, 1997 are
         not necessarily indicative of the results to be expected for the full
         year.

         Summarized below are the accounting policies utilized in preparing the
         financial statements presented.

         Operations

         The Company is engaged in onshore contract drilling of oil and gas
         wells and the development, exploration, acquisition and production of
         oil and natural gas.  Drilling services are provided to major oil and
         gas companies and independent producers in the West Texas area.  This
         financial presentation only includes the assets acquired by Patterson
         and the related direct drilling revenue, direct drilling expenses and
         allocated general and administrative expenses.  All of the activity
         related to the development, exploration, acquisition and production of
         oil and natural gas, general and administrative expenses allocated to
         other operations, other income and expense, including interest and
         income taxes have been excluded from the presentation.

         Subsidiaries

         The accompanying  financial statements include only the accounts of the
         Company.  WES-TEX Supply Company (WTS) which sells oil field supplies
         and Aztec Salvage Company (Aztec) are wholly-owned subsidiaries,
         however, they have been excluded from the financial presentation since
         WTS sells solely to the Company at cost and Aztec's only activity is to
         hold investments.

         Contracts in Progress and Customer Prepayments

         Drilling operations are accounted for on a completed contract basis
         such that revenue and expense is not recognized until the wells are
         completed. Costs incurred at year end on uncompleted drilling contracts
         are deferred and any customer advance payments or billings related to
         uncompleted drilling contracts are also deferred until the drilling
         contract has been completed.  Provisions for losses are made on
         incomplete contracts when significant losses are anticipated.





                                         8
<PAGE>   9
                            WES-TEX DRILLING COMPANY

                         NOTES TO FINANCIAL STATEMENTS



Note 1:  BASIS OF PRESENTATION - (continued)

         Inventory

         Inventory is stated at the lower of first-in, first-out cost or market.

         Property and Equipment

         Property and equipment are stated at cost less accumulated
         depreciation. The cost and accumulated depreciation of property and
         equipment sold or retired are removed from the related account. 
         Expenditures for repairs and maintenance are charged to expense as
         incurred, and renewals and improvements to property and equipment are
         capitalized.

         Depreciation

         Depreciation is provided on the straight-line method over the estimated
         useful lives as follows:

              Drilling rigs and equipment 5-10
              Transportation equipment 3-5
              Buildings 15
              Other equipment 3-10

         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 revenue
         and expenses during the reporting period.  Actual results could differ
         from those estimates.


Note 2:  RELATED PARTY TRANSACTIONS

         The Company has purchased services related to drilling operations from
         a company in which the Company has an ownership interest.  Services
         purchased from this entity amounted to approximately $3,000,000,
         $4,700,000 and $1,900,000 for the years ended December 31, 1996, 1995
         and 1994, and $350,000 and $984,000 for the three months ended March
         31, 1997 and 1996, respectively.  Management believes these
         transactions were under terms no less favorable to the Company than
         those arranged with other parties.





                                      9
<PAGE>   10
                            WES-TEX DRILLING COMPANY

                         NOTES TO FINANCIAL STATEMENTS



Note 3:  MAJOR CUSTOMERS

         Customers comprising 10% or more of drilling revenue during the years
         ended December 31, 1996, 1995 and 1994 are as follows:

<TABLE>
<CAPTION>
                                                 1996       1995       1994  
                                                 ----       ----       ----  
             <S>                                 <C>         <C>        <C>
             Union Pacific Resources Company      29%        37%        22%
             Louis Dreyfus Natural Gas Company    13%        14%        13%
</TABLE>


Note 4:  COMMITMENTS AND CONTINGENCIES

         The Company's drilling operations are subject to inherent risks,
         including blowouts, cratering, fire and explosions which could result
         in personal injury or death, suspend drilling operations, damage to or
         destruction of equipment and pollution or other environmental hazards.
         As a protection against these hazards, the Company maintains general
         liability insurance coverage of $1,000,000 per occurrence with
         $2,000,000 of aggregate and excess liability and umbrella coverages up
         to $20,000,000 per occurrence with a $20,000,000 aggregate.  The
         Company believes it is adequately insured for public liability and
         property damage to others with respect to its drilling 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 lenders which have a security interest in the drilling
         rigs are named as loss payees on the physical damage insurance on such
         rigs.  The Company has never been fined or incurred liability for
         pollution or other environmental damage in connections with its
         drilling operations.

         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 financial condition of the
         Company.


Note 5:  EMPLOYEES' RETIREMENT PLAN

         The Company has a defined contribution employee benefit plan available
         to substantially all employees.  The plan provides for annual
         discretionary contributions to be determined by the Board of Directors
         of the Company.  The participating employees make no contributions to
         the plan, and the Company may discontinue its contributions at any
         time.  The Company made discretionary contributions to the Plan of
         $300,000, $0 and $300,000  for the years ended December 31, 1996, 1995
         and 1994, respectively.  The discretionary contributions are
         determined and recorded at year end.

         Effective January 1, 1993 the Company amended and restated its plan to
         incorporate 401 (k) Profit Sharing Plan provisions to the Plan.
         During the years ended December 31, 1996, 1995 and 1994 the Company
         made $66,572, $43,912 and $38,936 in employer matching contributions
         to the Plan.  The cost of the discretionary contributions and employer
         matching contributions are allocated to drilling operations as a
         component of general and administrative expenses.  The percentage
         allocated to drilling operations were 88.29%, 92.07% and 91.77% for
         the years ended December 31, 1996, 1995 and 1994 respectively.  For
         the three months ended March 31, 1997 and 1996 the employer matching
         contributions were $29,105 and $11,666 respectively with 88.69% and
         93.16% being allocated to drilling operations.





                                      10
<PAGE>   11
                            WES-TEX DRILLING COMPANY

                         NOTES TO FINANCIAL STATEMENTS



Note 6:  CONCENTRATIONS OF CREDIT RISK

         The Company is required by SFAS No. 105, "Disclosure of Information
         about Financial Instruments with Off- Balance-Sheet Risk and Financial
         Instruments with Concentrations of Credit Risk," to disclose
         significant concentrations of credit risk.  Financial instruments
         which potentially subject the Company to concentrations of credit risk
         consist principally of trade receivables and cash on deposit with
         financial institutions in excess of federal insurance coverage.  The
         Company provides credit, in the normal course of business, to oil and
         gas related companies in the West Texas area.  The Company performs
         ongoing credit evaluations of its customers and has not had any
         significant write-offs of accounts.  Collateral for trade receivables
         is generally not required.





                                      11
<PAGE>   12
ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS.

    (b)   Pro forma financial information.

     Unaudited pro forma financial information as of March 31, 1997 and for the
three months ended March 31, 1997 and the year ended December 31, 1996 are 
provided below. The unaudited financial information reflects adjustments
necessary to give effect to the acquisition on June 12, 1997 by Patterson
Drilling Company (the "Company"), a wholly-owned subsidiary of Patterson Energy,
Inc., of the contract drilling assets of Wes-Tex Drilling Company ("Wes-Tex").
The unaudited pro forma balance sheet as of March 31, 1997 assumes the
acquisition was completed at March 31, 1997 and the unaudited pro forma
statements of income assume the acquisition was completed on January 1, 1996.
The pro forma adjustments are based upon available information and certain
assumptions the Company believes are reasonable. The unaudited pro forma
financial information is not necessarily indicative of operating results that
would have occurred had the acquisition been consummated on January 1, 1996, nor
are they indicative of future operating results of the combined companies.

                             PATTERSON ENERGY, INC.
                            PRO FORMA BALANCE SHEET
                                 MARCH 31, 1997

                                  (Unaudited)
                                 (in thousands)

                                     ASSETS


<TABLE>
<CAPTION>
                                                           Wes-Tex 
                                               Patterson   Drilling
                                             Energy, Inc.  Company    Adjustments    Pro Forma
                                             ------------  --------   -----------    ---------
<S>                                             <C>        <C>        <C>            <C>     
Current assets:
   Cash and cash equivalents ................   $ 35,415   $     --   $(19,000)(b)   $ 16,415
   Marketable securities ....................        543         --         --            543
   Inventory ................................         --        157       (157)(a)         --
   Accounts receivable:
      Trade .................................     23,802         --         --         23,802
      Oil and natural gas sales .............        973         --         --            973
   Costs of uncompleted drilling contracts
      in excess of related billings .........          6         --         --              6
   Deferred income taxes ....................      1,483         --         --          1,483
   Undeveloped oil and natural gas
      properties held for resale ............      4,907         --         --          4,907
   Other current assets .....................        303         --         --            303
                                                --------   --------   --------       --------
         Total current assets ...............     67,432        157    (19,157)        48,432
   Property and equipment, at cost, net .....     55,733      4,380     13,070(a)      73,183
   Intangible asset, net ....................         --         --     17,903(a)      17,903
   Deposits on worker's compensation
      insurance policy ......................        412         --         --            412
   Other ....................................        720         --         --            720
                                                --------   --------   --------       --------
         Total assets .......................   $124,297   $  4,537   $ 11,816       $140,650
                                                ========   ========   ========       ========
</TABLE>


         The accompanying notes are an integral part of these unaudited
                        pro forma financial statements.

                                  (continued)



                                      12
<PAGE>   13
                             PATTERSON ENERGY, INC.
                      PRO FORMA BALANCE SHEET - CONTINUED
                                 MARCH 31, 1997

                                  (Unaudited)
                                 (in thousands)

                      LIABILITIES AND STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>
                                                                Wes-Tex 
                                                    Patterson   Drilling
                                                  Energy, Inc.  Company    Adjustments    Pro Forma
                                                  ------------  --------   -----------    ---------
<S>                                                  <C>        <C>        <C>            <C>     
Current liabilities:
  Current maturities of note payable .............   $     --   $     --   $    323(b)    $    323
   Accounts payable:
     Trade .......................................      9,890         --        190(b)      10,080
     Revenue distribution ........................      3,246         --         --          3,246
     Other .......................................      1,523         --         --          1,523
   Accrued expenses ..............................      2,534         --         --          2,534
                                                     --------   --------   --------       --------
             Total current liabilities ...........     17,193         --        513         17,706
Deferred income taxes ............................        513         --         --            513
Deferred liabilities .............................        707         --         --            707
Notes payable, less current maturities ...........         --         --      5,677(b)       5,677
                                                     --------   --------   --------       --------
             Total liabilities ...................     18,413         --      6,190         24,603
                                                     --------   --------   --------       --------

Commitments and contingencies ....................         --         --         --             --

Stockholders' equity:
   Preferred stock - par value $.01; authorized
     1,000,000 shares, no shares issued ..........         --         --         --             --
   Common stock - par value $.01; authorized
     9,000,000 shares with 7,353,657 issued and
     outstanding at March 31, 1997 ...............         71         --          3(b)          74
   Additional paid-in capital ....................     82,099         --     10,160(b)      92,259
   Retained earnings .............................     23,714         --         --         23,714
   Assets acquired ...............................         --      4,537     (4,537)(a)         --
                                                     --------   --------   --------       --------
             Total stockholders' equity ..........    105,884      4,537      5,626        116,047
                                                     --------   --------   --------       --------
             Total liabilities and
                stockholders' equity .............   $124,297   $  4,537   $ 11,816       $140,650
                                                     ========   ========   ========       ========
</TABLE>




             The accompanying notes are an integral part of these
                   unaudited pro forma financial statements.


                                      13

<PAGE>   14
                             PATTERSON ENERGY, INC.
                         Pro Forma Statement of Income
                      For the year ended December 31, 1996

                                  (Unaudited)
                     (in thousands, except per share data)

<TABLE>
<CAPTION>
                                                          Wes-Tex 
                                            Patterson     Drilling
                                           Energy, Inc.   Company      Adjustments     Pro Forma
                                           ------------   ---------    -----------     ---------
<S>                                          <C>          <C>          <C>             <C>      
Operating revenues:
    Drilling .............................   $  73,590    $  47,010    $     848(d)    $ 121,448
    Oil and natural gas sales ............       8,299           --           --           8,299
    Well operation fees ..................       1,499           --           --           1,499
    Other ................................         320           --           --             320
                                             ---------    ---------    ---------       ---------
                                                83,708       47,010          848         131,566
                                             ---------    ---------    ---------       ---------
Operating costs and expenses:
    Direct drilling costs ................      59,564       40,409          878(d)      100,851
    Lease operating and production .......       2,012           --           --           2,012
    Impairment of oil and natural gas
      properties .........................         549           --           --             549
    Exploration costs ....................         466           --           --             466
    Dry holes and abandonments ...........         987           --           --             987
    Depreciation, depletion and
        amortization .....................       9,960        1,588        1,956(c)       13,504
    General and administrative expense ...       5,416        2,337           --           7,753
                                             ---------    ---------    ---------       ---------
                                                78,954       44,334        2,834         126,122
                                             ---------    ---------    ---------       ---------
Operating income .........................       4,754        2,676       (1,986)          5,444
                                             ---------    ---------    ---------       ---------
Other income (expense):
    Net gain on sale of assets ...........         546           --           --             546
    Interest income ......................         478           --           --             478
    Interest expense .....................      (1,612)          --         (497)(c)      (2,109)
    Non-recurring acquisition costs ......      (2,268)          --           --          (2,268)
    Other ................................         119           --           --             119
                                             ---------    ---------    ---------       ---------
                                                (2,737)          --         (497)         (3,234)
                                             ---------    ---------    ---------       ---------
Income before income taxes ...............       2,017        2,676       (2,483)          2,210
                                             ---------    ---------    ---------       ---------
Income tax expense (benefit):
    Current ..............................         174           --           --             174
    Deferred .............................      (2,428)          --           69(c)       (2,359)
                                             ---------    ---------    ---------       ---------
                                                (2,254)          --           69          (2,185)
                                             ---------    ---------    ---------       ---------
Net income ...............................   $   4,271    $   2,676    $  (2,552)      $   4,395
                                             =========    =========    =========       =========
Net income per common share:
    Primary ..............................   $    0.43          N/A          N/A       $    0.42
                                             =========    =========    =========       =========
    Fully diluted ........................   $    0.43          N/A          N/A       $    0.41
                                             =========    =========    =========       =========
Weighted average number of common
    shares outstanding:
    Primary ..............................       9,906          N/A          566(b)       10,472
                                             =========    =========    =========       =========
    Fully diluted ........................      10,042          N/A          566(b)       10,608
                                             =========    =========    =========       =========
</TABLE>




             The accompanying notes are an integral part of these
                   unaudited pro forma financial statements.

                                      14

<PAGE>   15
                             PATTERSON ENERGY, INC.
                         PRO FORMA STATEMENT OF INCOME
                   FOR THE THREE MONTHS ENDED MARCH 31, 1997

                                  (Unaudited)
                     (in thousands, except per share data)

<TABLE>
<CAPTION>
                                                          Wes-Tex 
                                            Patterson     Drilling
                                           Energy, Inc.   Company      Adjustments     Pro Forma
                                           ------------   ---------    -----------     ---------
<S>                                          <C>          <C>          <C>             <C>      
Operating revenues:
    Drilling .............................   $  27,564    $  11,793    $    (598)(d)   $  38,759
    Oil and natural gas sales ............       2,633           --           --           2,633
    Well operation fees ..................         407           --           --             407
    Other ................................          37           --           --              37
                                             ---------    ---------    ---------       ---------
                                                30,641       11,793         (598)         41,836
                                             ---------    ---------    ---------       ---------
Operating costs and expenses:
    Direct drilling costs ................      22,320       10,091         (589)(d)      31,822
    Lease operating and production .......         517           --           --             517
    Impairment of oil and natural gas 
      properties .........................         150           --           --             150
    Exploration costs ....................         159           --           --             159
    Dry holes and abandonments ...........         223           --           --             223
    Depreciation, depletion and
        amortization .....................       3,295          346          540(c)        4,181
    General and administrative expense ...       1,337          664           --           2,001
                                             ---------    ---------    ---------       ---------
                                                28,001       11,101          (49)         39,053
                                             ---------    ---------    ---------       ---------
Operating income .........................       2,640          692         (549)          2,783
                                             ---------    ---------    ---------       ---------
Other income (expense):
    Net gain on sale of assets ...........         135           --           --             135
    Interest income ......................         284           --           --             284
    Interest expense .....................        (483)          --         (124)(c)        (607)
    Other ................................          19           --           --              19
                                             ---------    ---------    ---------       ---------
                                                   (45)          --         (124)           (169)
                                             ---------    ---------    ---------       ---------
Income before income taxes ...............       2,595          692         (673)          2,614
                                             ---------    ---------    ---------       ---------
Income tax expense:
    Current ..............................         497           --            7(c)          504
    Deferred .............................         458           --           --             458
                                             ---------    ---------    ---------       ---------
                                                   955           --            7             962
                                             ---------    ---------    ---------       ---------
Net income ...............................   $   1,640    $     692    $    (680)      $   1,652
                                             =========    =========    =========       =========
Net income per common share:
    Primary ..............................   $    0.12          N/A          N/A       $    0.12
                                             =========    =========    =========       =========
    Fully diluted ........................   $    0.12          N/A          N/A       $    0.12
                                             =========    =========    =========       =========
Weighted average number of common
    shares outstanding:
    Primary ..............................      13,208          N/A          566(b)       13,774
                                             =========    =========    =========       =========
    Fully diluted ........................      13,208          N/A          566(b)       13,774
                                             =========    =========    =========       =========
</TABLE>




             The accompanying notes are an integral part of these
                  unaudited pro forma financial statements.


                                      15
<PAGE>   16
                             PATTERSON ENERGY, INC.
                NOTES TO UNAUDITED COMBINED FINANCIAL STATEMENTS

1.   BASIS OF PRESENTATION

          On June 12, 1997, the Company consummated an acquisition to purchase
     the contract drilling assets of Wes-Tex Drilling Company ("Wes-Tex"), a
     privately-held, non-affiliated company based in Abilene, Texas, for a
     purchase price of approximately $35.4 million; consisting of $25 million
     in cash, 283,000 shares of the Company's common stock, $0.01 par value,
     (valued at $31.50 per share), a three-year stock purchase warrant (valued
     at $6.24 per share) to purchase 200,000 additional shares of Patterson
     common stock at an exercise price of $32 per share and approximately
     $190,000 of other direct costs incurred relative to the transaction. The
     acquisition was funded using $19 million of the Company's cash on hand and
     $6 million provided by an existing $30 million line of credit. The assets
     acquired consist of 21 fully operable drilling rigs, all related rolling
     stock and a shop and yard. The Company did not assume any liabilities of
     Wes-Tex.

          The unaudited pro forma financial information reflects adjustments
     necessary to give effect to the acquisition on June 12, 1997 by Patterson
     Drilling Company (the "Company"), a wholly-owned subsidiary of Patterson
     Energy, Inc., of the contract drilling assets of Wes-Tex Drilling Company
     ("Wes-Tex"), as described above. The unaudited pro forma balance sheet as
     of March 31, 1997 assumes the acquisition was completed at March 31, 1997
     and the unaudited pro forma statements of income assume the acquisition
     was completed on January 1, 1996.

          The pro forma adjustments are based upon available information and
     certain assumptions the Company believes are reasonable. The unaudited pro
     forma financial information is not necessarily indicative of operating
     results that would have occurred had the acquisition been consummated on
     January 1, 1996, nor are they indicative of future operating results of
     the combined companies.

          The contract drilling revenue and direct operating expenses of
     Wes-Tex presented herein only include the revenues and expenses directly
     associated with the drilling operations of Wes-Tex, as well as the general
     and administrative expense allocated to such drilling activities. General
     and administrative expenses were allocated proportionately based on
     revenues contributed by the drilling and oil and gas production operations
     of Wes-Tex. Management believes that this is a reasonable basis to
     allocate general and administrative expenses.

          The effects of a two-for-one stock split, authorized by Patterson's
     Board of Directors on July 1, 1997, have been reflected in the Company's
     earnings per share and weighted average number of common shares
     outstanding for all periods presented.

2.   PERIODS PRESENTED

          The unaudited pro forma balance sheet and statement of income as of
     and for the three months ended March 31, 1997 was prepared using the
     unaudited consolidated financial statements for the quarterly period ended
     March 31, 1997 of Patterson Energy, Inc. as reported under Form 10-Q and
     the unaudited Statement of Assets Acquired and the unaudited Statement of
     Direct Drilling Revenue and Direct Operating Expenses of Wes-Tex for the
     period ended March 31, 1997, as filed herewith as Item 7. (a) of this
     report. The unaudited pro forma statement of income for the year ended
     December 31, 1996 was prepared using the audited consolidated financial
     statement of income for the year ended December 31, 1996 of Patterson
     Energy, Inc. as reported under Form 10-K and the audited Statement of
     Direct Drilling Revenue and Direct Operating Expenses of Wes-Tex for the
     year ended December 31, 1996, as filed herewith as Item 7. (a) of this
     report.



                                  (continued)
                                      16
<PAGE>   17
                             PATTERSON ENERGY, INC.
          NOTES TO UNAUDITED COMBINED FINANCIAL STATEMENTS - CONTINUED

3.   PRO FORMA ADJUSTMENTS

          a. The following pro forma adjustment reflects the allocation, based
     on the estimated fair values, of the purchase price of approximately $35.4
     million, as well as the elimination of the related book values of the
     assets acquired (thousands):

<TABLE>
<CAPTION>
                                    ALLOCATION OF   CARRYING
        ACCOUNT DESCRIPTION        PURCHASE PRICE     VALUE       ADJUSTMENT
     ------------------------------------------------------------------------
<S>                                     <C>            <C>        <C>      
     Inventory ....................     $    --        $  157     $   (157)
     Property and equipment .......      17,450         4,380       13,070
     Intangible assets:
       Goodwill ...................      16,629            --       16,629
       Covenants not to compete ...       1,274            --        1,274
     Assets acquired ..............          --         4,537       (4,537)
</TABLE>

          The purchase price allocation as detailed above is preliminary in 
     nature and subject to change.

          b. The following pro forma adjustment reflects the related funding of
     the acquisition discussed above (in thousands):



<TABLE>
<CAPTION>
                         ACCOUNT DESCRIPTION                ADJUSTMENT
                   ------------------------------------------------------
<S>                                                           <C>       
                   Cash and cash equivalents ...........      $ (19,000)
                   Draw down on line of credit .........          6,000
                   Accrued expenses ....................            190
                   Common stock ........................              3
                   Additional paid-in capital ..........         10,160
</TABLE>


          c. Depreciation and amortization expense, interest expense and income
     tax expense were adjusted to reflect increases resulting from the
     acquisition of the contract drilling assets of Wes-Tex. Depreciation
     expense was determined on a straight line basis using depreciable lives
     consistent with those historically used by the Company. Amortization
     expense was determined on a straight line basis over five and fifteen
     years for the covenants not to compete and goodwill, respectively. The
     related expense accounts were increased as follows (in thousands):


<TABLE>
<CAPTION>
                                        THREE MONTHS ENDED       YEAR ENDED
           ACCOUNT DESCRIPTION            MARCH 31, 1997      DECEMBER 31, 1996
     ---------------------------------------------------------------------------
<S>                                              <C>                  <C>    
     Depreciation and amortization .....         $ 540                $ 1,956
     Interest expense ..................           124                    497
     Income tax expense ................             7                    204
</TABLE>

          d. Contract drilling revenues and direct contract drilling costs were
     adjusted to convert Wes-Tex's methodology of accounting for wells in
     progress from the completed contract method for day work and footage
     drilling arrangements to the percentage-of-completion method.


                                      17
<PAGE>   18
                                   SIGNATURE

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                                             PATTERSON ENERGY, INC.




Date:  August 12, 1997                        /s/  James C. Brown   
                                             ---------------------------------
                                             James C. Brown 
                                             Vice President-Finance



                                      18


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