HAWKINS ENERGY CORP
PRE 14A, 1996-11-15
EQUIPMENT RENTAL & LEASING, NEC
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<PAGE>
 
                            SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Filed by the Registrant [X]
Filed by a party other than the Registrant  [ ]

Check the appropriate box:
[X]  Preliminary Proxy Statement
[ ]  Confidential, for Use of the Commission Only (as permitted by 
     Rule 14a-6(e)(2))
[ ]  Definitive Proxy Statement
[ ]  Definitive Additional Materials
[ ]  Soliciting Material Pursuant to (S)240.14a-11(c) or (S)240.14a-12


                           HAWKINS ENERGY CORPORATION
                           --------------------------
                (Name of Registrant as specified in its Charter)


Payment of Filing Fee (check the appropriate box):
[X]  $125 per Exchange Act Rules 0-11(c)(1)(ii), 14a-6(i)(1), 14a-6(i)(2) or
     Item 22(a)(2) of Schedule 14A.
[ ]  $500 per each party to the controversy pursuant to Exchange Act Rule 14a-
     6(i)(3).
[ ]  Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

     (1)  Title of each class of securities to which transaction applies:

          ___________________________________________________________________

     (2)  Aggregate number of securities to which transaction applies:

          ___________________________________________________________________

     (3)  Per unit price or other underlying value of transaction computed
          pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the
          filing fee is calculated and state how it was determined):

          ___________________________________________________________________

     (4)  Proposed maximum aggregate value of transaction:

          ___________________________________________________________________


     (5) Total fee paid:  ___________________________________________________

[ ]  Fee paid previously with preliminary materials.

[ ]  Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2) and identify the filing for which the offsetting fee was paid
     previously.  Identify the previous filing by registration statement number,
     or the Form or Schedule and the date of its filing.
     (1) Amount previously paid: ______________________________________________
     (2) Form, Schedule or Registration Statement No.:_________________________
     (3) Filing party: ________________________________________________________
     (4) Date filed: __________________________________________________________
<PAGE>
 
                           HAWKINS ENERGY CORPORATION
                      TWENTY EAST FIFTH STREET, SUITE 1500
                             TULSA, OKLAHOMA  74103

                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                          TO BE HELD DECEMBER 16, 1996

TO THE STOCKHOLDERS OF
HAWKINS ENERGY CORPORATION:

     NOTICE IS HEREBY GIVEN that a Special Meeting of Stockholders of Hawkins
Energy Corporation, an Oklahoma corporation (the "Company"), will be held in the
offices of the Company at Twenty East Fifth Street, Suite 1500, 15th Floor,
Tulsa, Oklahoma, on Monday, December 16, 1996, at 10:00 a.m., local time, for
the following purposes:

     1.   To consider and act upon a proposal to approve an amendment to the
          Company's Certificate of Incorporation to increase the number of
          authorized shares of Common Stock, par value $.01 per share, from
          20,000,000 shares to 40,000,000 shares;

     2.   To consider and act upon a proposal to approve an amendment to the
          Company's Certificate of Incorporation to change the name of the
          Company to "Equity Compression Services Corporation;" and

     3.   To transact such other business as may properly come before the
          meeting or any adjournment thereof.

     The Board of Directors has fixed the close of business on November 15,
1996, as the record date for the determination of stockholders entitled to
notice of and to vote at the Special Meeting or any adjournments thereof.  Only
stockholders of record at the close of business on the record date are entitled
to vote at the meeting or any adjournment thereof.

                                         By Order of the Board of Directors,



                                         Lynnwood R. Moore, Jr.
                                         Secretary
Tulsa, Oklahoma
________  __, 1996

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

                            YOUR VOTE IS IMPORTANT
 
  IT IS IMPORTANT THAT YOUR SHARES BE REPRESENTED AT THE MEETING.  WHETHER
  OR NOT YOU PLAN TO ATTEND THE MEETING, PLEASE MARK, SIGN, DATE AND RETURN
  THE ACCOMPANYING PROXY IN THE ENCLOSED ENVELOPE.  NO POSTAGE IS REQUIRED
  IF MAILED IN THE UNITED STATES.  IF YOU DO ATTEND THE MEETING, YOU MAY
  WITHDRAW YOUR PROXY AND VOTE IN PERSON.
- --------------------------------------------------------------------------------
<PAGE>
 
                           HAWKINS ENERGY CORPORATION
                      TWENTY EAST FIFTH STREET, SUITE 1500
                             TULSA, OKLAHOMA  74103

                                PROXY STATEMENT

                        SPECIAL MEETING OF STOCKHOLDERS
                               DECEMBER 16, 1996

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

                              GENERAL INFORMATION

     This Proxy Statement is furnished in connection with the solicitation of
proxies by the management and Board of Directors of Hawkins Energy Corporation
(the "Company") to be used at the Special Meeting of Stockholders to be held
Monday, December 16, 1996, at 10:00 a.m., local time, in the executive offices
of the Company at Twenty East Fifth Street, Suite 1500, 15th Floor, Tulsa,
Oklahoma 72103 and all adjournment(s) thereof, for the purposes set forth in the
attached Notice of Special Meeting.  The approximate date upon which this Proxy
Statement and the form of proxy are being mailed to stockholders is
_____________ __, 1996.

EXPENSES OF SOLICITATION

     The expenses in connection with the solicitation of proxies, including the
cost of preparing, handling, printing and mailing the Notice of Special Meeting,
Proxy Statement and form of proxy, have been or will be borne by the Company.
The Company may reimburse banks, brokerage houses and other custodians, nominees
and fiduciaries for reasonable expenses incurred in sending proxy material to
their principals to obtain authorization for the execution of proxies.

     Directors, officers and other employees of the Company may solicit proxies
personally, by telephone or telegram, from some stockholders if proxies are not
received promptly.

QUORUM AND VOTE REQUIRED

     The presence, in person or by proxy, of a majority of the outstanding
shares of Common Stock of the Company is necessary to constitute a quorum at the
Special Meeting.  The affirmative vote of the holders of a majority of the
outstanding shares of Common Stock is required to approve the amendments to the
Company's Certificate of Incorporation.  Abstentions from voting and broker non-
votes will be treated as shares that are present for purposes of determining a
quorum and will have the same effect as a vote against the proposed amendments
to the Company's Certificate of Incorporation.

     HACL, Ltd., a Texas limited partnership ("HACL"), has obtained proxies from
holders of more than a majority of the outstanding shares of Common Stock of the
Company to vote such shares in favor of the proposals at the Special Meeting,
thereby assuring the approval of the amendments to the Company's Certificate of
Incorporation.  See "Proposal to Increase the Number of Authorized Shares of
Common Stock--Background and Reasons for Proposed Amendment."  Stockholders of
the Company will not be entitled to dissenters' appraisal rights with respect to
the amendments to the Certificate of Incorporation.

REVOCABILITY OF PROXIES

     The form of proxy enclosed is for use at the Special Meeting if a
stockholder is unable to attend or does not desire to vote in person.  At any
time before the shares represented by the proxy are voted at the Special
Meeting, the stockholder may revoke the proxy by delivering to the Secretary of
the Company a written revocation of the proxy, by delivering a later dated
proxy, or by voting in person while in attendance at the Special Meeting.
<PAGE>
 
MANNER OF VOTING PROXIES

     All shares represented by valid proxies received prior to the meeting, and
not revoked, will be voted in accordance with the instructions on the proxy.  If
the proxy is signed and returned to the Company, but no instructions are given,
it is intended that the proxy will be voted FOR the approval of the amendments
to the Company's Certificate of Incorporation.  As to any other business that
may properly come before the meeting, including all matters incident to the
conduct of the meeting, it is intended that the proxy will be voted in respect
thereof in accordance with the judgment of the person voting the proxies.

STOCKHOLDER PROPOSALS FOR 1997 MEETING

     Under the rules of the Securities and Exchange Commission, in order to be
considered for inclusion in the Company's proxy statement relating to the 1997
Annual Meeting of Stockholders, a stockholder proposal must be received by the
Company at its principal offices, Twenty East Fifth Street, Suite 1500, Tulsa,
Oklahoma 74103, addressed to the Secretary of the Company, on or before December
27, 1996.


      PROPOSAL TO INCREASE THE NUMBER OF AUTHORIZED SHARES OF COMMON STOCK

     The Board of Directors has approved and recommends that the stockholders
approve and adopt a proposal to amend the Certificate of Incorporation of the
Company (the "Proposed Amendment") to increase the number of authorized shares
of the Company's common stock, par value $.01 per share (the "Common Stock"),
from 20,000,000 shares to 40,000,000 shares (the number of authorized shares of
the Company's preferred stock, par value $1.00 per share, will remain unchanged
at 1,000,000 shares).  The Proposed Amendment will amend the first sentence of
Article Fourth of the Company's Certificate of Incorporation to read as follows:

     "The aggregate number of shares of all classes of stock which the
     Corporation shall have authority to issue is 41,000,000, 40,000,000 of
     which shall be Common Stock of the par value of $.01 per share (hereinafter
     called "Common Stock") and 1,000,000 of which shall be Preferred Stock of
     the par value of $1.00 per share (hereinafter called "Preferred Stock")."

BACKGROUND AND REASONS FOR PROPOSED AMENDMENT

     During the early part of 1996, the Company's Board of Directors began
considering alternative business plans and corporate developments for the
Company.  Various alternatives considered were for the Company (i) to focus on
only one of its two primary business segments, either oil and gas exploration,
development and production or natural gas compressor sales and leasing, by
selling or otherwise disposing of one of such segments and focusing on expanding
operations in the other; (ii) to seek some form of business combination with
another company; and (iii) to simply continue to operate the two separate
business segments as the Company has since its formation in 1989.

     The Company became acquainted with certain of the principals of HACL (the
"HACL Group") through its banking relationships and began preliminary
discussions with that group in late May, 1996.  Members of the group had
recently liquidated their interests in a company named Cornerstone Natural Gas,
Inc. (which was acquired by El Paso Natural Gas Company) in which they had
acquired a controlling interest during 1993 and were considering a significant
investment in another company which might present them with a similar growth
opportunity.  The market capitalization of Cornerstone grew from $8,200,000
($.66 per share) in November of 1993 to $98,000,000 ($6.00 per share) at the
time of its acquisition by El Paso.

     On July 1, 1996, the Company received an informal proposal from the HACL
Group.  A special committee of the Company's Board of Directors was formed to
(i) consider the advisability and desirability of an investment by the HACL
Group in the Company; (ii) consider alternative proposals or courses of action
for the Company; (iii) review the terms of any such transaction or transactions
on behalf of the Company; and (iv) recommend to the

                                       2
<PAGE>
 
Board of Directors as a whole whether the Company should engage in such a
transaction.  The Special Committee consisted of Charles M. Butler, III,
Clifford S. Lewis, Thomas F. Ostrye and Don E. Smith.  Thomas F. Ostrye,
Chairman, President and Treasurer of the Company, was principally responsible
for the negotiations with the HACL Group and the Special Committee met a total
of four times, including two meetings at which representatives of the HACL Group
were present.

     On August 13, 1996, Simmons & Company International ("Simmons") was engaged
to advise the Board of Directors on the fairness of the proposed transaction to
the Company from a financial point of view.  See "Opinion of Financial Advisor"
below.

     Negotiations continued with the HACL Group and led to a proposed letter of
intent in September 1996.  At its special meeting held on September 23, 1996,
the Board of Directors considered the proposed letter of intent and also
considered an informal proposal received by another company pursuant to which
the Company would merge with the other company, the assets of the Company would
be sold and the proceeds of the sale would be used to fund the business of the
merged company which would have been involved primarily in natural gas
marketing, processing and gathering.  Simmons reviewed both proposals and
advised that the proposal from the HACL Group was fair to the Company from a
financial point of view and that the offer from the other company did not appear
to be as favorable to the Company as the proposal from the HACL Group.

     The letter of intent with the HACL Group was signed by the Company on
September 21, 1996, and was approved by the Board of Directors on September 23,
1996.  The parties then began negotiating the terms of a definitive Stock
Purchase Agreement.  Simmons participated to a limited extent in the
negotiations, particularly in the discussions regarding the amount and type of
the consideration that should be paid for the securities.

     In considering the amount and type of the consideration for the securities,
the parties took into account the then market value of the Company's Common
Stock (during the two months prior to the execution of the  letter of intent,
the closing sales prices of the Company's Common Stock as reported by the NASDAQ
Small Cap Market ranged from $.5625 to $.8125 per share and was $.7813 per share
on September 18, 1996, the last day the Common Stock traded prior to entering
into the letter of intent), the fact that the shares and warrants to be issued
to the purchaser would be restricted securities, the value to the Company of the
business opportunities and prospects that the parties anticipate that the
purchaser will be able to bring to the Company and other related considerations.
The parties also considered the impact on the Company's performance that might
be expected in the event that the business opportunities and prospects were
effected.

     On October 16, 1996, the Board of Directors approved the Stock Purchase
Agreement with HACL and it was executed by the Company.  At that meeting,
Simmons confirmed verbally its opinion as to the fairness of the consideration
to be received by the Company and delivered a final draft of its fairness letter
to the Board on that same date.  See "Opinion of Financial Advisor" below.
Under the terms of the Stock Purchase Agreement, the Company has agreed to sell
to HACL 8,000,000 shares of Common Stock and warrants which, upon satisfying
certain vesting requirements, will entitle HACL to purchase an additional
8,000,000 shares of Common Stock at a price of $0.91 per share (the "Warrants"),
for an aggregate consideration of $4,400,000 in cash and HACL's covenant to
utilize its reasonable efforts to provide the Company with certain business
transactions.  See "Terms of the Stock Purchase Agreement" below.

     The purpose of the Proposed Amendment and the reason it is being
recommended to stockholders is that the increase in the authorized shares of
Common Stock is necessary for the Company to effect the transactions
contemplated pursuant to the Stock Purchase Agreement.  At November 4, 1996, the
Company had 13,040,168 shares of Common Stock outstanding (exclusive of 9,067
shares of treasury stock) and 20,000,000 authorized shares of Common Stock.
Accordingly, without the increase in the authorized capital proposed hereby,
there would not be sufficient authorized and unissued shares of Common Stock
available to meet the Company's obligations to issue up to 16,000,000 shares of
Common Stock under the terms of the Stock Purchase Agreement in the event all of
the Warrants are exercised.  The Board believes that increasing the number of
authorized shares of Common Stock to 40,000,000 is appropriate so the Company
will have authorized capital available in the event that it encounters

                                       3
<PAGE>
 
acquisition or capitalization opportunities in the future.

     The Board believes that the proposed transaction with HACL will provide the
Company with the growth potential through the capital HACL will contribute for
the Common Stock and Warrants it is acquiring and through the additional
business development opportunities that HACL has agreed to attempt to bring to
the Company's natural gas compression and oil and natural gas production
operations.  See "Terms of the Stock Purchase Agreement--Expiration and Vesting
of Warrants" below.

     THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR THE AMENDMENT TO INCREASE THE
COMPANY'S AUTHORIZED COMMON STOCK.

TERMS OF THE STOCK PURCHASE AGREEMENT

     Pursuant to the Stock Purchase Agreement, the Company will issue to HACL or
its designee 8,000,000 shares of Common Stock and Warrants which, upon
satisfying certain vesting requirements discussed below, will entitle the holder
to purchase an additional 8,000,000 shares of Common Stock at a price of $0.91
per share. The Common Stock and Warrants are being issued to HACL for aggregate
consideration of $4,400,000 in cash and HACL's covenant to utilize its
reasonable efforts to provide the Company with certain business transactions
which satisfy the vesting requirements of the Warrants (see "--Expiration and
Vesting of Warrants" below). In addition, the Company has agreed to elect up to
eight persons designated by HACL to the Company's Board of Directors following
the closing of the sale of the Common Stock and Warrants pursuant to the Stock
Purchase Agreement and, thereafter, to include among its nominees for the Board
of Directors a sufficient number of persons designated by HACL such that the
percentage of directors proposed to be composed of HACL's designees is
approximately proportionately equal to HACL's percentage ownership of the
Company's total outstanding shares of Common Stock. It is anticipated that the
sale of Common Stock and Warrants pursuant to the Stock Purchase Agreement will
be consummated as soon as practicable after the Special Meeting and all of the
conditions precedent to such sale contained in the Stock Purchase Agreement have
been satisfied. See "-- Conditions to Stock Purchase Agreement" below.

    Upon consummation of the sale of the Common Stock and Warrants pursuant to 
the Stock Purchase Agreement, HACL, or its designee, will own approximately 38% 
of the Company's outstanding shares of Common Stock based on the number of 
shares outstanding as of November 4, 1996. Should the Warrants vest and be 
exercised in full, HACL or its designee may own in the aggregate up to 55.1% of 
the Company's outstanding shares of Common Stock based on the number of shares 
outstanding as of November 4, 1996.

    Expiration and Vesting of Warrants.  All of the Warrants to be issued to
HACL will expire four years from the date of issuance (the "Expiration Date").
The Warrants will not become exercisable until the satisfaction of the following
vesting requirements:

     Providing New Business.  The Warrants will vest based upon HACL, directly
     ----------------------                                                   
or indirectly, providing to the Company contracts or agreements to lease natural
gas compressors from the Company having an aggregate horsepower as follows:

<TABLE>
<CAPTION>
 
     AGGREGATE HORSEPOWER          PERCENT OF WARRANTS VESTED
     --------------------          --------------------------
<S>                                <C>
      15,000 or greater                        100%
      11,250 to 14,999                          75%
      7,500 to 11,249                           50%
      3,750 to 7,499                            25%

</TABLE>

     For purposes of satisfying the above vesting requirements, the following
transactions will be considered the equivalent to providing contracts or
agreements for the lease of natural gas compressors:

     .    Any sale and lease back transaction originated by HACL, provided that
          the purchase price of the compressors to the Company does not exceed
          their fair market value, the lease rentals are at not less than market
          rates and the transaction is approved by directors of the Company not
          affiliated with or designated by HACL.

                                       4
<PAGE>
 
     .    Any compressors provided by the Company to any oil and gas properties
          acquired by the Company which were identified by HACL and which
          properties satisfy any of the vesting requirements discussed below.

     There is no specified length or other required terms of the compressor
leases to be provided by HACL for these purposes.  However, only the leases
provided by HACL which are in effect at the time that any vesting determination
is made will be taken into account for vesting purposes.  The properties on
which the compressors may be located may be owned by affiliates of HACL or by
third parties.

     The Warrants will vest in the percentages reflected in column (4) below
upon HACL providing compressor leases aggregating the aggregate minimum
horsepower reflected in column (1) below if, in addition, the Company also
acquires either (i) oil and gas properties identified by HACL which have an
aggregate purchase price indicated in column (2) below or (ii) other compressor
leasing companies identified by HACL which have under lease compressors which
have an aggregate horsepower equal to at least the amounts reflected in column
(3) below.

<TABLE>
<CAPTION>
    (1)              (2)                    (3)                 (4)
                                     AGGREGATE HORSEPOWER              
  MINIMUM     AGGREGATE PURCHASE        UNDER LEASE BY       PERCENT OF
 AGGREGATE       PRICE OF OIL          ACQUIRED COMPANY       WARRANTS 
 HORSEPOWER   AND GAS PROPERTIES    AT TIME OF ACQUISITION    VESTED   
- ------------  -------------------   ----------------------   ----------
<S>           <C>                   <C>                      <C>
   7,500      at least $4,000,000      7,500 or greater        100%
   6,000      at least $3,000,000       at least 5,625          75%
   4,250      at least $2,000,000       at least 3,750          50%
   2,500      at least $1,000,000       at least 1,875          25%
 
</TABLE>

     In addition, the Warrants may vest through a combination of the methods set
forth above, provided that there must be compressor leases for the minimum
aggregate horsepower reflected in Column (1) for the percentage of Warrants
indicated in Column (4) to vest.  If any portion of the Warrants vest pursuant
to the immediately preceding table above, then for any contracts or agreements,
or set of contracts or agreements, provided by HACL for the lease of natural gas
compressors from the Company having an additional aggregate of 3,750 horsepower
or more, then an additional 25% of the Warrants shall vest with respect to each
incremental addition of an aggregate of 3,750 horsepower.  In addition, the
acquisition by the Company of producing oil and gas properties identified by
HACL in a transaction reflected in Column (2) will be considered in determining
the vesting of the Warrants in combination with any acquisition by the Company
of a company in the business of owning and leasing natural gas compressors by
treating each $1,000,000 of the purchase price of such producing oil and gas
properties to be the equivalent of an aggregate horsepower of 1,875 under lease
by an acquired company.

     Change of Control.  Upon the occurrence of certain events which result in a
     -----------------                                                          
"change of control" of the Company, then all unvested Warrants will become
vested.  A change in control will be deemed to have taken place upon the
occurrence of the following events: (i) as a result of a proxy solicitation by a
party other than the Company, the directors serving on the Company's Board
immediately prior to such action no longer constitute a majority of the total
number of directors of the Company following such action; (ii) any person or
group other than HACL or its affiliates acquires more than 50% of the Company's
outstanding voting securities; (iii) the Company's stockholders approve the
merger or consolidation of the Company with another corporation or business
organization, the sale of substantially all of the Company's assets or the
liquidation or dissolution of the Company, unless, in the case of a merger or
consolidation, the directors in office immediately prior to such transaction
constitute a majority of the directors of the surviving entity or a majority of
the disinterested directors of the Company approve such transaction; or (iv) a
majority of the disinterested directors of the Company determine that any other
proposed action

                                       5
<PAGE>
 
would constitute a change in control and such action is taken.

     Conditions to Closing.  The Stock Purchase Agreement provided that HACL
would have until October 30, 1996, to perform a due diligence review and could,
on or before such date, notify the Company that it was electing to cancel its
obligations under the contract.  No such notice was received.  The Stock
Purchase Agreement also provided that a condition to HACL's obligations was its
obtaining proxies from ten or fewer stockholders of the Company holding a
majority of the outstanding shares of Common Stock which would allow it to vote
those shares in favor of the proposed amendments to the Company's Certificate of
Incorporation.  HACL has received such proxies and, as a result, approval of the
amendments is assured.

     The obligations of each party to consummate the transactions contemplated
by the Stock Purchase Agreement are subject to a number of conditions, including
the following:  (i) each of the representations, warranties and covenants of the
other party set forth in the Stock Purchase Agreement shall, in all material
respects, be true on, or complied with by, the closing date as if made on such
date and each party shall have received a certificate of an officer of the other
party to such effect; (ii) no preliminary or permanent injunction or other final
order by any federal or state court shall have been issued which prevents the
proposed transactions pursuant the Stock Purchase Agreement; (iii) each party
shall have received a legal opinion, dated the date of closing, from counsel to
the other party as to certain matters; and (iv) stockholders of the Company
shall have approved an amendment to the Company's Certificate of Incorporation
to increase the number of authorized shares of Common Stock to 40,000,000.

     Conduct of Business Pending Closing.  The Stock Purchase Agreement contains
certain restrictions on the conduct of the Company's business pending closing of
the transactions under the agreement.  The Company may not, among other things,
amend its Certificate of Incorporation or bylaws, declare or pay any dividend
with respect to its Common Stock, authorize capital expenditures in excess of
$100,000 in the aggregate other than in the ordinary course of business, or
enter into any new employment or severance agreement with any director, officer
or employee of the Company.  In addition, the Company has agreed to conduct
business in the usual and ordinary course and use its best efforts to preserve
its business organization and maintain its existing relations with customers,
suppliers, employees and business associates in all material respects.

     Registration Rights.  That Stock Purchase Agreement provides that after two
years from the date of the consummation of the sale of the Common Stock and
Warrants to HACL, upon the request of HACL, the Company will register under the
Securities Act of 1933, as amended, any of the shares of Common Stock issued
pursuant to the Stock Purchase Agreement or upon exercise of Warrants, for sale
in accordance with HACL's intended method of disposition thereof (a "Demand
Registration").  HACL will have the right to request up to two Demand
Registrations.  The Company will have the right under certain circumstances to
delay the filing of a Demand Registration.  HACL will also have "piggy-back"
registration rights to include the shares of Common Stock then held by it in
certain other registrations by the Company of its Common Stock.  The Company
will be required to pay all costs and expenses in connection with each
registration except HACL's attorney's fees and any underwriting fees or
commission's applicable to the shares of Common Stock sold by HACL.

OPINION OF FINANCIAL ADVISOR

     The Board of Directors of the Company retained Simmons as its financial
advisor in connection with the proposed transaction with HACL.  Simmons has
rendered an opinion to the Board of Directors that, based on and subject to the
matters set forth therein, the consideration to be paid to the Company by HACL
in the proposed transaction is fair to the Company from a financial point of
view.  The full text of Simmons' opinion is set forth in Appendix A to this
Proxy Statement and should be read in its entirety by the stockholders of the
Company.

     Simmons' opinion is directed only to the fairness from a financial view of
the consideration to be received by the Company from HACL in the proposed
transaction and does not constitute a recommendation to the Company's
stockholders with respect to the transaction.  The consideration to be received
by the Company was determined through negotiations between the Company and HACL.
The opinion rendered by Simmons does not

                                       6
<PAGE>
 
address the relative merits of the proposed transaction as compared to other
alternative transactions which might be available to the Company.  In addition,
Simmons did not express any opinion regarding the trading market for, or the
market price of, the Company's Common Stock, or the effect of the ownership
interest represented by the shares of Common Stock and Warrants to be acquired
by HACL on the trading market for, or the market price of, the Common Stock
following the consummation of the proposed transaction.

     The opinion indicates that Simmons reviewed and analyzed, among other
things, certain publicly available financial and other data concerning the
Company, including its financial statements, certain internal information,
primarily financial, furnished by the Company, historical and current market
data for the Company's Common Stock, certain publicly available information with
respect to other companies believed by Simmons to be comparable to the Company
and the trading markets for the securities of such companies and certain
publicly available information concerning the nature and terms of other
transactions considered relevant by Simmons.  Simmons met with certain officers
and employees of the Company and HACL to discuss the foregoing as well as other
matters deemed relevant to Simmons' inquiry.  Simmons also took into account its
assessment of such financial and other factors it deemed relevant, including,
among others, the historical and current financial position and results of
operations of the Company, the business prospects of the Company, general
economic, market and financial conditions and its experience in connection with
similar transactions and securities valuation generally.

     In connection with its services in rendering the fairness opinion, Simmons
will receive a fee of approximately $125,000, plus reasonable travel and out-of-
pocket expenses.  The Company has also agreed to indemnify Simmons against
certain liabilities and expenses, including liabilities arising under federal
securities laws, in connection with Simmons' services to the Company.

     Simmons is a specialized energy-related investment banking firm engaged in
the valuation of businesses and their securities in connection with mergers and
acquisitions, the management and underwriting of sales of equity and debt to the
public, and private placements of equity and debt.  In the ordinary course of
its business, Simmons may actively trade the Company's Common Stock for its own
account and for the accounts of customers and, accordingly, may at any time hold
a long or short position in the Common Stock.

INTERESTS OF CERTAIN PERSONS IN THE TRANSACTION

     The Company entered into a "Change of Control" Agreement dated March 27,
1996, and amended as of October 16, 1996 (the "Change Agreement"), with Thomas
F. Ostrye, Chairman of the Board and President of the Company. Under the Change
Agreement, if there is a "change of control" and Mr. Ostrye is involuntarily
terminated other than for "cause" or other than by reason of death or disability
or if he voluntarily terminates after a reduction in his compensation or
responsibilities or a requested relocation, he will be entitled to receive a
final payment after his termination of employment in an amount equal to his
compensation, including bonuses, for the twelve months immediately preceding his
termination plus the value of employee benefits received for that twelve month
period.  The consummation of the transactions pursuant to the Stock Purchase
Agreement will result in a "change in control" under the Change Agreement.
"Cause" includes theft or conviction of a felony or any crime involving
dishonesty or moral turpitude, or gross neglect and inattention to duties.

USE OF PROCEEDS

     The Company intends to use the cash consideration of $4.4 million to be
received from the sale of the Common Stock and Warrants pursuant to the Stock
Purchase Agreement to repay a portion of its outstanding indebtedness under a
revolving line of credit.  In September 1995, the Company entered into a
Revolving Credit and Term Loan Agreement to refinance its existing indebtedness
and to provide additional borrowing amounts under an 18 month revolving line of
credit having a $12 million cap (the "Revolving Credit Facility").  At September
30, 1996, the Revolving Credit Facility had a borrowing base of $8.8 million and
the Company had borrowed $7.82 million of the available credit line.  The
Revolving Credit Facility bears interest at the prime rate plus 2% (9.75% at
September 30, 1996), payable monthly, and the outstanding balance thereunder at
March 31, 1997 converts into term note payable over 36 months.

                                       7
<PAGE>
 
     Reducing the outstanding balance of the Revolving Credit Facility will
result in additional amounts being available for borrowing thereunder.  The
Company expects that it will incur additional borrowings under the Revolving
Credit Facility as needed to acquire additional natural gas compressors or oil
and gas properties or for other business or investment opportunities it may
develope.

INFORMATION CONCERNING DIRECTORS TO BE DESIGNATED BY HACL

     The Stock Purchase Agreement provides that after the closing of the
transactions pursuant thereto, that HACL may designate up to eight directors,
which will constitute a majority of the members of the Company's Board of
Directors, who shall be immediately appointed to the Board of Directors of the
Company by the current members of the Board.  It is currently anticipated that
Donald C. Nejedly and probably two additional current directors of the Company
will resign shortly after consummation of the sale of the Common Stock and
Warrants to HACL and that the five persons named below will be appointed to the
Board.  If fewer than three of the current directors resign, it is anticipated
that additional designees of HACL will be appointed to the Board after the
closing as necessary for the designees of HACL to represent a majority of the
members of the Board of Directors.  The identity of such additional designees,
if any, has not yet been determined.

     The Company's Board of Directors is divided into three classes--Class I,
Class II and Class III--with each class being as equal in size as possible and
with the terms of each class ending in successive years.  Each designated
director appointed to the Board, however, will not be classified and will serve
until the next annual meeting of stockholders at which time all unclassified
directors shall be nominated for election and designated in one of the three
classes.  Set forth below is certain information with respect to each HACL
designee to the Company's Board of Directors.  Each designee is an investor in 
HACL.

     Mr. Ray C. Davis, 53.  Mr. Davis is a founding principal of Energy Transfer
Company, an energy investment firm.  Mr. Davis founded Capstone Partners in
1988, a buy out firm formed to acquire under performing companies.  He served as
Chairman and CEO of several companies acquired by Capstone Partners, including
Healthco International Inc., a $500 million a year dental supply company, HPSC,
an equipment leasing company quoted on the Nasdaq system, and Cornerstone
Natural Gas, Inc.,  a natural gas pipeline and processing company listed on the
American Stock Exchange.  Mr. Davis served as Director and General Partner of
Hydro Environmental Services, Inc. from 1989 to 1992, and as Chief Executive
Officer of Healthco International, Inc. from June 1991 to August 1992.  He was
also Chairman of the Board of HPSC, Inc. from 1991 to 1992.  On June 9, 1993,
Healthco International, Inc. filed for protection under Chapter 11 in the U.S.
Bankruptcy Court in the Western District of Massachusetts, Western Division,
Case No. 93-41604-JFQ.  In connection with Mr. Davis' and a group of investors' 
initial acquisition of an interest in Cornerstone Natural Gas, Inc. and as part 
of a pre-packaged plan, Cornerstone and certain of its subsidiaries filed
voluntary petitions under Chapter 11 of the Bankruptcy Code with the U.S.
Bankruptcy Court for the Eastern District of Texas, Sherman Division. On
November 2, 1993, Cornerstone emerged from such pre-packaged plan and Mr. Davis
and the investor group acquired their interest in Cornerstone. From 1983 to
1988, he shared the operating duties of Colt Industries, a Fortune 200
diversified manufacturer. Mr. Davis was last responsible for two groups of
companies with operations in 15 countries and sales in excess of $1 billion. Mr.
Davis held several executive positions in Colt Industries and, prior to that,
held several management positions at Mobil Chemical, a division of Mobil Oil.

     Mr. Kelcy L. Warren, 41.  Kelcy L. Warren is a founding principal of Energy
Transfer Company, an energy investment firm.  Prior to forming Energy Transfer
Company, he was employed by Endevco, Inc., a natural gas pipeline and
processing company and predecessor of Cornerstone Natural Gas, Inc., from 1981
to 1992. At Endevco, Mr. Warren served in many capacities, including President,
Chief Operating Officer and Director. He and a group of investors acquired
controlling interest of Cornerstone Natural Gas, Inc. in 1993 as part of a pre-
packaged plan, whereby Endevco, Inc. and certain of its subsidiaries filed
voluntary petitions under Chapter 11 of the Bankruptcy Code with the U.S.
Bankruptcy Court for the Eastern District of Texas, Sherman Division. On
November 2, 1993, Cornerstone Natural Gas, Inc. emerged from such pre-packaged
plan and Mr. Warren and the investor group acquired their interest in
Cornerstone. Mr. Warren served as President, Chief Operating Officer and a
director of Cornerstone until its sale to El Paso Natural Gas Company in 1996.
Prior to joining Endevco, Mr. Warren was employed by Lone Star Gas Company.

                                       8
<PAGE>
 
     Mr. Matthew S. Ramsey, 41. Mr. Ramsey is a private investor and attorney.
Mr. Ramsey served as Vice President of Nuevo Energy Company, an independent
energy company, from 1990 to 1996. From 1990 to 1996, he was employed by Torch
Energy Advisors Incorporated, a company providing management and operations
services to energy companies including Nuevo Energy Company, last serving as a
director and Executive Vice President. Mr. Ramsey joined Torch Energy as Vice
President of Land and was named Senior Vice President of Land in 1992. Prior to
joining Torch Energy, Mr. Ramsey was self-employed for eleven years. Mr. Ramsey
holds a B.B.A. in Marketing from the University of Texas at Austin and a J.D.
from South Texas College of Law. Mr. Ramsey is a graduate of Harvard Business
School's Advanced Management Program. He is licensed to practice law in the
State of Texas.

     Mr. Richard D. Brannon, 37.  Mr. Brannon is President of Brannon Oil & Gas,
Inc., an independent energy investment company.  Mr. Brannon is also an active
investor in oil and gas production, natural gas pipelines, real estate and
equity investments.  He has a broad range of experience in the natural gas
industry from drilling and well completion to managing acquisitions, finance and
contract negotiations.  Mr. Brannon served as director of Cornerstone Natural
Gas, Inc., a natural gas pipeline and processing company, until its sale to El
Paso Natural Gas Company in 1996.  Mr. Brannon also previously served as an
Advisory Board member to First Interstate Bank, Ft. Worth.  Mr. Brannon began
his career in 1981 with TXO Production Corp. as a completion and reservoir
engineer.  Mr. Brannon has a B.S. degree in Petroleum Engineering from the
University of Texas and is a Certified Professional Engineer.

     Mr. Jon P. Stevenson, 51.  Mr. Stevenson is President and owner of
Sandollar Oil & Gas, Inc., an independent exploration and production company
located in Longview, Texas.  Prior to forming Sandollar in 1981, Mr. Stevenson
was employed from 1971 to 1980 by Enserch Exploration, Inc. in Dallas, Texas, in
various engineering capacities, with his last assignment being Vice President of
Production.  He began his career in 1968 as an engineer with Shell Oil Company
in New Orleans, Louisiana.  Mr. Stevenson received his B.S. degree in Petroleum
Engineering from Louisiana Tech University in 1968.  He is a Certified
Professional Engineer in the State of Texas.

                   PROPOSAL TO CHANGE THE NAME OF THE COMPANY

     The Board of Directors has approved and recommends that the stockholders
approve and adopt a proposal to amend the Certificate of Incorporation of the
Company to change the corporate name of the Company to "Equity Compression
Services Corporation."  The Company was formed in 1989 to consolidate the
businesses and assets of Equity Compressors, Inc. and ten oil and gas limited
partnerships sponsored by Hawkins Oil & Gas, Inc. ("Hawkins Oil & Gas").  As a
result of the consolidation, Hawkins Oil & Gas originally became the Company's
largest stockholder, and the Company subleased office space from and shared
certain administrative services with Hawkins Oil & Gas through the end of 1995.
Since its formation, the Company has grown through 1993 acquisitions of Mid-
South Compressors, Inc. and Owens Compression Services, Inc. which substantially
diluted Hawkins Oil & Gas' ownership in the Company.  Accordingly, the Board of
Directors of the Company believes that the continued use of "Hawkins" in the
Company's name causes some confusion because it suggests that the Company is
still affiliated with Hawkins Oil & Gas.  In addition, the investment by HACL in
the Company will result in a change in control of the Company as HACL will
immediately have the right to designate a majority of the Company's Board of
Directors.  The Board of Directors believes the change in the corporate name to
"Equity Compression Services Corporation" will reflect the change in control of
the Company and provide the Company with increased independent name recognition.

     THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR THE CHANGE IN CORPORATE NAME.

                                       9
<PAGE>
 
             VOTING SECURITIES AND PRINCIPAL STOCKHOLDERS THEREOF

     At the close of business on November 4, 1996, there were 13,040,168
issued and outstanding shares of the Common Stock (exclusive of 9,067 shares
held in treasury) of the Company.  Each holder of Common Stock is entitled to
one vote per share on all matters.  There is no other class of securities of the
Company entitled to vote at the meeting.  Only stockholders of record at the
close of business on November 15, 1996, will be entitled to vote at the Special
Meeting.

     The following table sets forth certain information regarding the
beneficial ownership of the Company's Common Stock as of November 4, 1996, and
as adjusted to reflect the sale of the Common Stock pursuant to the Stock
Purchase Agreement, by (i) all persons who were known by the Company to be
beneficial owners of more than five percent of the outstanding shares of Common
Stock, (ii) each director, (iii) each executive officer named in the Summary
Compensation Table included in the Company's Proxy Statement for its Annual
Meeting held May 14, 1996, individually, and (iv) all the directors and
executive officers of the Company as a group.  Unless otherwise noted, the
persons named below have sole voting and investment power with respect to such
shares.

<TABLE>
<CAPTION>
                                                        PERCENT BENEFICIALLY OWNED
                                                       -----------------------------
       NAME AND ADDRESS                                   BEFORE          AFTER
      OF BENEFICIAL OWNER           NUMBER OF SHARES   TRANSACTION   TRANSACTION(11)
- --------------------------------    ----------------   -----------   ---------------
<S>                                 <C>                <C>           <C>
Hawkins Oil & Gas, Inc.               1,296,582(1)         9.94%            6.16%
  400 S. Boston, Suite 800                             
  Tulsa, OK 74103                                      
R.P. Gregory, Jr.                     3,037,251(2)        23.29%           14.44%
  7575 San Felipe, Suite 350                           
  Houston, TX 77063                                    
                                                       
DIRECTORS AND EXECUTIVE OFFICERS                       
Charles M.  Butler, III                 152,500(3)         1.17%             *
John B. Hawkins                       1,414,534(4)        10.76%            6.69%
Clifford S. Lewis                        84,935(5)          *                *
Donald C. Nejedly                        22,500(6)          *                *
Thomas F. Ostrye                        214,847(7)         1.62%            1.01%
Don E. Smith                            972,183(8)         7.42%            4.61%
David J. Parsons                         56,703(9)          *                *
All Directors and Executive Officer   2,930,563(10)       21.61%           13.89%
   as a Group (9 Persons)
</TABLE>
- ---------------
*  Less than 1%

                                      10
<PAGE>
 
(1)  Includes 40,319 shares attributable to Hawkins Oil & Gas, Inc.'s general
     partner interest in HX 1986, 19,522 shares attributable to its general
     partner interest in Hawkins Exploration and 47,393 shares attributable to
     the Hawkins Oil & Gas, Inc. Profit Sharing Plan.

(2)  Includes 3,037,251 shares which are held of record by Gregory & Cook, Inc.,
     but of which Mr. Gregory, as the majority owner of Gregory & Cook, Inc. has
     the power to direct the voting and disposition of such shares.

(3)  Includes 27,500 shares which may be acquired upon the exercise of presently
     exercisable options.

(4)  Includes 105,000 shares which may be acquired upon the exercise of
     presently exercisable options, 1,296,582 shares owned directly and
     indirectly by Hawkins Oil & Gas, Inc., but which may also be attributable
     to John B. Hawkins based on his individual ownership of the common stock of
     Hawkins Oil & Gas, Inc., and 11,634 shares held by the Hawkins Energy
     Corporation 401(k) Plan (the "401(k) Plan") and allocated to the account of
     John B. Hawkins.

(5)  Includes 55,000 shares which may be acquired upon the exercise of presently
     exercisable options, and 29,935 shares held by the 401(k) Plan and
     allocated to the account of Mr. Lewis.

(6)  Includes 22,500 shares which may be acquired upon the exercise of presently
     exercisable options.

(7)  Includes 200,000 shares which may be acquired upon the exercise of
     presently exercisable options, and 14,545 shares held by the 401(k) Plan
     and allocated to the account of Mr. Ostrye.

(8)  Includes 60,000 shares which may be acquired upon the exercise of presently
     exercisable options, and 12,790 shares held by the 401(k) Plan and
     allocated to the account of Mr. Smith.

(9)  Includes 52,500 shares which may be acquired upon the exercise of presently
     exercisable options, and 4,203 shares held by the 401(k) Plan and allocated
     to the account of Mr. Parsons

(10) Includes 522,500 shares which may be acquired upon the exercise of
     presently exercisable options and 73,107 shares held by the 401(k) Plan and
     allocated to the accounts of such individuals.

(11) As adjusted to reflect sale of 8,000,000 shares of Common Stock pursuant to
     the Stock Purchase Agreement.  Excludes 8,000,000 shares of Common Stock
     reserved for issuance upon exercise of the Warrants to be issued pursuant
     to the Stock Purchase Agreement.

                                 OTHER MATTERS

MATTERS WHICH MAY COME BEFORE THE SPECIAL MEETING

     The Board of Directors does not intend to bring any other matters before
the meeting, nor does the Board of Directors know of any matters which other
persons intend to bring before the meeting.  If, however, other matters not
mentioned in this Proxy Statement properly come before the meeting, the persons
named in the accompanying Proxy Card will vote thereon in accordance with the
recommendation of the Board of Directors.

     REMINDER:  PLEASE SIGN, DATE AND RETURN YOUR PROXY CARD TO ASSURE THAT ALL
OF YOUR SHARES WILL BE VOTED.

                                      11
<PAGE>
 
         [LETTERHEAD OF SIMMONS & COMPANY INTERNATIONAL APPEARS HERE]

October 16, 1996


Board of Directors
Hawkins Energy Corporation
Twenty East Fifth Street
Suite 1500
Tulsa, Oklahoma  74103

Members of the Board:

You have requested the opinion of Simmons & Company International ("Simmons") as
investment bankers as to the fairness, from a financial point of view, to
Hawkins Energy Corporation (the "Company") of the proposed sale of shares of
common stock, par value $0.01 per share of the Company (the "Company Common
Stock"), and warrants to purchase Company Common Stock (the "Proposed
Transaction") pursuant to the Stock Purchase Agreement (the "Agreement") between
the Company and HACL, Ltd. (the "Purchaser"), a limited partnership to be formed
under the laws of Texas to consummate the Proposed Transaction.

As more specifically set forth in the Agreement, in the Proposed Transaction the
Purchaser will agree to purchase from the Company, and the Company will agree to
sell to the Purchaser, a total of 8,000,000 shares of Company Common Stock, and
8,000,000 warrants (the "Warrants"). The total consideration to be paid by the
Purchaser to the Company at closing for the issuance of such securities shall be
$4,400,000. Each Warrant will entitle the Purchaser to the right to purchase one
share of Company Common Stock upon exercise of the Warrant at an exercise price
of $0.91 per share. The Warrants will expire at the end of four years from the
date of initial issuance. The Warrants will become exercisable only when vested
based on the following schedule: (i) the Warrants will become fully vested upon
the Purchaser providing to the Company contracts committing to lease from the
Company natural gas compressors having an aggregate of 15,000 horsepower; with
25 percent of the Warrants becoming vested when such contracts commit to leasing
natural gas compressors having an aggregate of 3,750 horsepower, 50 percent of
the Warrants becoming vested when such contracts commit to leasing natural gas
compressors having an aggregate of 7,500 horsepower, and 75 percent of the
Warrants becoming vested when such contracts commit to leasing natural gas
compressors having an aggregate of 11,250 horsepower; or (ii) the Warrants will
become fully vested upon the Purchaser providing to the Company contracts
committing to lease from the Company natural gas compressors having an aggregate
of 7,500 horsepower and the Purchaser identifying oil and gas properties which
are acquired by the Company in one or more transactions approved by a majority
of the members of the Board of Directors of the Company not affiliated with or
designated by the Purchaser (an "Approved Transaction") with an aggregate
purchase price of at least $4,000,000; with 25 percent of the 
<PAGE>
 
Board of Directors
Hawkins Energy Corporation
October 16, 1996
Page 2


Warrants becoming vested upon the Purchaser providing to the Company contracts
committing to lease from the Company natural gas compressors having an aggregate
of 2,500 horsepower and the Purchaser identifying oil and gas properties which
are acquired by the Company in one or more Approved Transactions with an
aggregate purchase price of $1,000,000, 50 percent of the Warrants becoming
vested upon the Purchaser providing to the Company contracts committing to lease
from the Company natural gas compressors having an aggregate of 4,250 horsepower
and the Purchaser identifying oil and gas properties which are acquired by the
Company in one or more Approved Transactions with an aggregate purchase price of
$2,000,000, and 75 percent of the Warrants becoming vested upon the Purchaser
providing to the Company contracts committing to lease from the Company natural
gas compressors having an aggregate of 6,000 horsepower and the Purchaser
identifying oil and gas properties which are acquired by the Company in one or
more Approved Transactions with an aggregate purchase price of $3,000,000, or
(iii) the Warrants will become fully vested upon the Purchaser providing to the
Company contracts committing to lease from the Company natural gas compressors
having an aggregate of 7,500 horsepower and the Purchaser identifying a company
or companies which are acquired by the Company which have compressor leases in
effect covering an aggregate of at least 7,500 horsepower; with 25 percent of
the Warrants becoming vested upon the Purchaser providing to the Company
contracts committing to lease from the Company natural gas compressors having an
aggregate of 2,500 horsepower and the Purchaser identifying a company or
companies which are acquired by the Company which have compressor leases in
effect covering an aggregate of at least 1,875 horsepower, 50 percent of the
Warrants becoming vested upon the Purchaser providing to the Company contracts
committing to lease from the Company natural gas compressors having an aggregate
of 4,250 horsepower and the Purchaser identifying a company or companies which
are acquired by the Company which have compressor leases in effect covering an
aggregate of at least 3,750 horsepower, and 75 percent of the Warrants becoming
vested upon the Purchaser providing to the Company contracts committing to lease
from the Company natural gas compressors having an aggregate of 6,000 horsepower
and the Purchaser identifying a company or companies which are acquired by the
Company which have compressor leases in effect covering an aggregate of at least
5,625 horsepower; or (iv) if the Company has acquired producing oil and gas
properties identified by the Purchaser and has acquired companies identified by
the Purchaser which are in the business of owning and leasing natural gas
compressors to third parties, both types of acquisitions shall be considered in
determining the vesting of the Warrants, with each $1,000,000 of purchase price
of such producing oil and gas properties purchased in one or more Approved
Transactions being considered to be the equivalent of compressor leases of such
acquired companies with an aggregate horsepower of 1,875 and vice versa,
providing in no event shall any Warrants vest
<PAGE>
 
Board of Directors
Hawkins Energy Corporation
October 16, 1996
Page 3

unless the compressor leases provided by the Purchaser or its Affiliates
pursuant to (i) above cover compressors which have an aggregate of at least
2,500 horsepower; in no event shall the percentage of Warrants that vests exceed
25 percent unless the compressor leases provided by the Purchaser pursuant to
(i) above cover compressors which have an aggregate of at least 4,250
horsepower; in no event shall the percentage of Warrants that vests exceed 50
percent unless the compressor leases provided by the Purchaser pursuant to (i)
above cover compressors which have an aggregate of at least 6,000 horsepower,
and in no event shall the percentage of Warrants that vests exceed 75 percent
unless the compressor leases provided by the Purchaser pursuant to (i) above
cover compressors which have an aggregate of at least 7,500 horsepower; or (v)
the Warrants will become fully vested if the Company consummates a merger in
which the Company is not the surviving company or which involves a change of
control of the Company, and such change of control is approved by a majority
vote of the shareholders of the Company.

Simmons, as a specialized energy-related investment banking firm, is engaged in
the valuation of businesses and their securities in connection with mergers and
acquisitions, the management and underwriting of sales of equity and debt to the
public, and private placements of equity and debt.  In the ordinary course of
business, Simmons may actively trade Company Common Stock for its own account
and for the accounts of customers and, accordingly, may at any time hold a long
or short position in such security.

In connection with rendering its opinion, Simmons has reviewed and analyzed,
among other things, the following:  (i) the Letter of Intent between the Company
and Purchaser dated September 21, 1996; (ii) the Agreement; (iii) the financial
statements and other information concerning the Company, including the Annual
Reports on Form 10-KSB of the Company for each of the years in the four-year
period ended December 31, 1995, the Quarterly Reports on Form 10-QSB of the
Company for the quarters ended March 31, 1996 and June 30, 1996, the Current
Report on Form 8-K dated June 30, 1995 and the Registration Statement on Form S-
3 of the Company related to a shelf registration of Company Common Stock dated
July 21, 1994, as amended; (iv) certain other internal information, primarily
financial in nature, concerning the business and operations of the Company
furnished by the Company for the purposes of Simmons' analysis; (v) certain
publicly available information concerning the trading of, and the trading market
for, Company Common Stock; (vi) certain publicly available information with
respect to certain other companies that Simmons believes to be comparable to the
Company (the "Comparable Companies") and the trading markets for such Comparable
Companies' securities; (vii) certain publicly available information concerning
estimates of the future operating and financial performance of the 
<PAGE>
 
Board of Directors
Hawkins Energy Corporation
October 16, 1996
Page 4

Comparable Companies prepared by industry experts unaffiliated with the Company;
and (viii) certain publicly available information concerning the nature and
terms of certain other transactions considered relevant to the inquiry. Simmons
has also met with certain officers and employees of the Company and Purchaser to
discuss the foregoing as well as other matters believed relevant to the inquiry.

In arriving at its opinion, Simmons has assumed and relied upon the accuracy and
completeness of all of the financial and other information provided by the
Company or publicly available, and has not attempted independently to verify any
of such information.  With respect to financial projections provided by the
Company and estimates of potential rental rates, profitability and capital costs
of additional compressors, Simmons has assumed, with your consent, that they
were reasonably prepared on bases reflecting the best currently available
estimates and judgments of the Company's management.  Simmons has not conducted
a physical inspection of any of the properties or facilities of the Company, nor
has Simmons made or obtained any independent evaluations or appraisals of any of
such properties or facilities.

In conducting its analysis and arriving at its opinion as expressed herein,
Simmons has considered such financial and other factors as it deemed appropriate
under the circumstances including, among others, the following:  (i) the
historical and current financial position and results of operations of the
Company; (ii) the business prospects of the Company; (iii) the historical and
current market for Company Common Stock and equity securities of the Comparable
Companies; and (iv) the nature and terms of certain other acquisition
transactions that Simmons believes to be relevant.  Simmons has also taken into
account its assessment of general economic, market and financial conditions and
its experience in connection with similar transactions and securities' valuation
generally.  Simmons' opinion necessarily is based upon conditions as they exist
and can be evaluated on, and on the information made available at, the date
hereof.

Simmons is acting as financial advisor to the Company in this transaction and
will receive a customary fee for its services.  Simmons' opinion expressed
herein is provided for the information and assistance of the Board of Directors
of the Company in connection with its consideration of the transaction
contemplated hereby and is not to be construed as a recommendation to the
holders of the Company Common Stock with respect to the Proposed Transaction.
Simmons was not authorized to solicit, nor did Simmons solicit from others,
indications of interest with respect to purchasing any securities of the Company
or with respect to acquiring the Company.  Simmons' opinion does not address the
relative merits of the Proposed Transaction as compared to other alternative
transactions which might be available to the Company.  Simmons is not expressing
any opinion regarding the value that would be realized upon the sale of any
<PAGE>
 
Board of Directors
Hawkins Energy Corporation
October 16, 1996
Page 5

securities of the Company or upon the liquidation or sale of the Company.
Furthermore, Simmons is not expressing any opinion regarding the trading market
for, or the market price of, the Company Common Stock, or the effect of the
ownership interest, represented by shares of Company Common Stock and the
Warrants, to be held by the Purchaser on the trading market for, or the market
price of, the Company Common Stock following the Proposed Transaction.

Based upon and subject to the foregoing, Simmons is of the opinion, as
investment bankers, that the consideration to be paid to the Company by the
Purchaser in the Proposed Transaction is fair to the Company from a financial
point of view.

Sincerely,

SIMMONS & COMPANY INTERNATIONAL

/s/  Frederick W. Charlton
- --------------------------
Frederick W. Charlton
Vice President
<PAGE>
 
                           HAWKINS ENERGY CORPORATION


PROXY FOR THE SPECIAL MEETING OF STOCKHOLDERS TO BE HELD AT 10:00 A.M. LOCAL
TIME ON DECEMBER 16, 1996 IN THE PRINCIPAL OFFICES OF HAWKINS ENERGY
CORPORATION, TWENTY EAST FIFTH STREET, SUITE 1500, 15TH FLOOR, TULSA OKLAHOMA.

     The undersigned stockholder(s) of Hawkins Energy Corporation (the
"Corporation") do(es) hereby nominate, constitute and appoint THOMAS F. OSTRYE
and LYNNWOOD R. MOORE, JR., or either of them, as proxies of the undersigned,
each will full powers of substitution and resubstitution, to represent and vote
the shares of capital stock of the Corporation held of record by the undersigned
on the record date for the above-described special meeting, at such meeting and
at any adjournment thereof as specified on the reverse side.

           (Continued and to be signed and dated on the reverse side)

                              FOLD AND DETACH HERE
<PAGE>
 
1.   Proposal to approve the amendment to the Certificate of Incorporation to
     increase the number of authorized shares of common stock from 20,000,000
     shares to 40,000,000 shares as described in the accompanying Proxy
     Statement.

               FOR            AGAINST              ABSTAIN

2.   Proposal to approve the amendment to the Certificate of Incorporation of
     the Corporation to change the corporate name to "Equity Compression
     Services Corporation."

               FOR            AGAINST              ABSTAIN

3.   To vote upon such other business as may properly come before the meeting or
     any adjournment thereof.

               THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS AND
               WILL BE VOTED IN ACCORDANCE WITH THE SPECIFICATIONS MADE HEREIN.
               IF A CHOICE IS NOT INDICATED WITH RESPECT TO ANY PROPOSAL ABOVE,
               THIS PROXY WILL BE VOTED "FOR" SAID PROPOSAL.  IF ANY OTHER
               MATTERS SHOULD BE BROUGHT BEFORE THE MEETING, THE PROXIES WILL
               VOTE ON SUCH MATTERS IN ACCORDANCE WITH THEIR BEST JUDGMENT.
               THIS PROXY IS REVOCABLE AT ANY TIME BEFORE IT IS EXERCISED.

               DATED this ______ day of ______________________, 1996.

 

 
               Signature(s) of Stockholder(s)

               Joint owners must EACH sign.  Please sign EXACTLY as your name(s)
               appear(s) on this card.  When signing as attorney, trustee,
               executor, administrator, guardian or corporate officer, please
               give your FULL title.  If a partnership, please sign in
               partnership name by authorized person.


                        PLEASE SIGN, DATE AND MAIL TODAY


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