KEY ENERGY GROUP INC
SC 14D1/A, 1998-08-26
DRILLING OIL & GAS WELLS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                 SCHEDULE 14D-1
                             TENDER OFFER STATEMENT
                          PURSUANT TO SECTION 14(D)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                                (AMENDMENT NO. 1)

                                       AND

                                  SCHEDULE 13D
                                (AMENDMENT NO. 6)
                        UNDER THE SECURITIES ACT OF 1934

                                 ---------------
                        DAWSON PRODUCTION SERVICES, INC.
                            (NAME OF SUBJECT COMPANY)

                            MIDLAND ACQUISITION CORP.

                             KEY ENERGY GROUP, INC.
                                    (BIDDERS)

                     COMMON STOCK, PAR VALUE $.01 PER SHARE
             (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
                         (TITLE OF CLASS OF SECURITIES)

                                    239423106
                      (CUSIP NUMBER OF CLASS OF SECURITIES)

                               JACK D. LOFTIS, JR.
                          TWO TOWER CENTER, 20TH FLOOR
                        EAST BRUNSWICK, NEW JERSEY 08816
                                 (732) 247-4822

            (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON AUTHORIZED
           TO RECEIVE NOTICES AND COMMUNICATIONS ON BEHALF OF BIDDER)

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

                                 WITH A COPY TO:

                                MICHAEL P. ROGAN
                                C. KEVIN BARNETTE
                    SKADDEN, ARPS, SLATE, MEAGHER & FLOM LLP
                           1440 NEW YORK AVENUE, N.W.
                             WASHINGTON, D.C. 20005
                            TELEPHONE: (202) 371-7000
<PAGE>
          This Amendment No. 1 (this "Amendment") amends and supplements the
Tender Offer Statement on Schedule 14D-1 filed on August 17, 1998 (the "Schedule
14D-1") by Key Energy Group, Inc., a Maryland corporation ("Parent"), and its
wholly owned subsidiary, Midland Acquisition Corp., a New Jersey corporation
(the "Purchaser"), relating to the Purchaser's tender offer for all outstanding
shares of common stock, par value $0.01 per share, including the associated
common stock purchase rights, of Dawson Production Services, Inc., a Texas
corporation (the "Company") upon the terms and subject to the conditions set
forth in the Offer to Purchase, dated August 17, 1998 (the "Offer to Purchase").
Capitalized terms used but not otherwise defined herein shall have the meanings
ascribed to such terms in the Schedule 14D-1 and the Offer to Purchase. This
Amendment also constitutes Amendment No. 6 to the statement on Schedule 13D (as
amended, the "Schedule 13D") of Parent and the Purchaser filed on June 15, 1998,
as amended by Amendment No. 1 on June 29, 1998, Amendment No. 2 on July 21,
1998, Amendment No. 3 on August 5, 1998, Amendment No.4 on August 11, 1998 and
Amendment No. 5 on August 17, 1998. Except as amended and supplemented hereby,
the Schedule 14D-1 and the Schedule 13D remain in effect. The item numbers and
responses thereto set forth below are in accordance with the requirements of
Schedule 14D-1.


ITEM 4.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

          Item 4 is hereby amended and supplemented by adding the following
thereto:

          (b)  Commitment Letter from Lehman Brothers. Parent has been provided
with a commitment (the "Interim Loan Commitment") by Lehman Commercial Paper
Inc. ("Lehman Commercial Paper"), as Administrative Agent and Lehman Brothers
Inc. ("Lehman Brothers" and, together with Lehman Commercial Paper, "Lehman"),
as exclusive advisor and arranger under the Interim Loan Agreement (as defined
below), dated as of August 24, 1998, pursuant to which Lehman Commercial Paper
has agreed, upon the terms and conditions set forth in the Interim Loan
Commitment, to provide, or cause their affiliates or assignees to provide,
Parent with up to $150 million in interim loans (the "Interim Loans"). Under the
terms of the Interim Loan Commitment, the Interim Loans may be drawn upon at the
time of payment for Shares tendered in the Offer and the funds will be used to
purchase Shares validly tendered and pay related fees and expenses. The Interim
Loan Commitment provides that Lehman Commercial Paper will have the right to
arrange for other banks, financial institutions and other financial investors
(together with Lehman Commercial Paper, the "Interim Lenders") to directly
provide a portion of the funds constituting the Interim Loans.

                                       1
<PAGE>
          The obligation of Lehman Commercial Paper and each of the Interim
Lenders to provide the Interim Loans under the Interim Loan Commitment is
subject to, among others, the following conditions: (i) the execution and
delivery of a definitive loan agreement (the "Interim Loan Agreement") and the
execution and delivery of definitive documentation with respect to the New
Credit Facility (as defined below) with PNC; (ii) the satisfaction or waiver
with the approval of Lehman Commercial Paper of all conditions to the New Credit
Facility; (iii) the borrowing of funds under the New Credit Facility, which
together with the Interim Loans will be sufficient to consummate the Offer and
pay all related fees and expenses; (iv) there shall be available under the New
Credit Facility sufficient amounts to fund the Senior Note Repurchase (as
defined below) and to pay the other unfunded amounts required in connection with
the acquisition of the Company by Parent and the Purchaser; (v) no default or
event of default shall have occurred under the New Credit Facility, the Interim
Loans or the Interim Loan Agreement or under any material indebtedness of Parent
or the Company; (vi) the capitalization, corporate and ownership structure of
Parent before and after the acquisition of the Company will be satisfactory to
the Interim Lenders in all respects; (vii) Parent and the Company will not have
any outstanding debt other than that contemplated by the Interim Loan
Commitment; (viii) concurrence by the Interim Lenders with the operating and
financial assumptions used in preparing the combined pro forma financial
information of the Company after its acquisition by Parent; (ix) absence of
material adverse changes with respect to the consolidated financial condition,
operations, business, assets, liabilities, management, prospects or value of
Parent or the Company; (x) absence of certain adverse events with respect to the
New York Stock Exchange and the general economic, political or financial
conditions of the financial markets in the United States; (xi) no change in law
resulting in the Interim Loans being a charge to net capital to the Interim
Lenders; (xii) receipt of an environmental audit of Parent and the Company by
the Interim Lenders; (xiii) receipt of required governmental and shareholder
approvals; and (xiv) after giving effect to the consummation of the Offer, an
amount undrawn and available under the New Credit Facility shall be sufficient
to fund the Merger and the Senior Note Repurchase, to refinance indebtedness
required to be refinanced, and to pay related transaction fees and costs.

          Under the terms of the Interim Loan Commitment, the Interim Loans will
bear interest at a variable per annum rate (the "Interest Rate") equal to the
sum of (a) a base rate to be selected by Lehman Commercial Paper on the date of
funding (the "Funding Date") equal to the one- or three- month LIBOR reset
monthly or quarterly, as the case may be, calculated on the actual number of
days elapsed in a year of 360 days plus (b) a margin equal to 550 basis points.
The margin will increase by 50 basis points upon the 180-day anniversary of the
Funding Date and by an additional 50 basis points on each 90-day anniversary
thereafter. The Interim Loan Commitment further provides that the Interest Rate
will not exceed 17% per annum and to the extent that any interest payable on the

                                        2
<PAGE>
Interim Loans on any interest payment date exceeds 14% per annum, Parent shall
have the option to pay such excess by capitalizing such interest as additional
Interim Loans. Interest will be payable quarterly, in arrears, on the Maturity
Date (as defined below) and on the date of any prepayment of the Interim Loans.

          The Interim Loan Commitment provides that the Interim Loans will be
senior secured Interim Loans from the Funding Date until the date of the Merger,
ranking pari passu with the New Credit Facility and from and after the date of
the Merger, the Interim Loans will be subordinated in right of payment to the
payment in full of all obligations under the New Credit Facility and certain
refinancings thereof, on terms satisfactory to the Interim Lenders in their sole
discretion. The Interim Loan Commitment further provides that the Interim Loans
will be prepaid in an amount equal to the difference between the principal
amount of Interim Loans actually funded and the total amount of funds required
to effect the Senior Note Repurchase.

          The Interim Loans will mature 365 days from the Funding Date (the
"Maturity Date"). If the Interim Loans are not repaid in full prior to the
Maturity Date and upon the satisfaction of certain conditions set forth in the
Interim Loan Commitment, the Interim Loans will automatically be converted on
the Maturity Date into term loans due 2008 (the "Term Loans") of Parent in an
aggregate principal amount equal to the aggregate senior principal amount of
Interim Loans so converted. The Interim Loan Commitment provides that at any
time on or after the Maturity Date, the Term Loans may, at the option of a
holder thereof and with the consent of Lehman Commercial Paper and subject to
certain conditions set forth in the Interim Loan Commitment, be exchanged for a
senior subordinated exchange note (the "Exchange Notes") having a principal
amount equal to the principal amount of the Term Loan for which it is exchanged.
The Term Loans and Exchange Notes will bear interest at a rate to be determined
on the Maturity Date and shall equal (a) the interest rate borne by the Interim
Loans on the day immediately preceding the Maturity Date plus 100 basis points
plus (b) in the case of the Term Loans, a margin of 100 basis points beginning
on the first 90-day anniversary of the Maturity Date and increasing by 100 basis
points on each 90-day anniversary thereafter. The Interim Loan Commitment
further provides that Parent will file a shelf registration statement (the
"Shelf Registration Statement") with the Commission with respect to the Exchange
Notes and has agreed to pay a margin ranging from an additional 50 to 200 basis
points on the principal amount of Exchange Notes depending on when the Shelf
Registration Statement is filed.

          The Interim Loan Commitment further provides that the Interim Loans
will be guaranteed by each of Parent's subsidiaries that guarantees all or any
portion of the indebtedness under the New Credit Facility. Under the terms of
the Interim Loan Commitment, Parent will be required to repay the Interim Loans

                                        3
<PAGE>
from the net proceeds from any direct or indirect incurrence of subordinated
indebtedness by Parent or any other issuance of debt or equity securities of
Parent or any of its subsidiaries. The Interim Loan Commitment also provides
that upon a change of control of Parent (as defined in the Interim Loan
Commitment), Parent must offer to repay the Interim Loans at a price of 101% of
the principal amount outstanding, plus accrued fees and all accrued but unpaid
interest.

          Under the terms of the Interim Loan Commitment, Parent has agreed to
pay Lehman Commercial Paper certain fees, to reimburse Lehman Commercial Paper
for reasonable out-of-pocket expenses and to provide certain indemnities, as is
customary for commitments such as the Interim Loan Commitment.

          Commitment Letter with PNC. Parent has been provided with a commitment
(the "New Financing Commitment"), dated as of August 24, 1998, to provide Parent
with $550,000,000 in senior secured credit facilities (the "New Credit
Facility") that replaces the Financing Commitment with PNC, dated as of August
17, 1998, previously disclosed in the Offer to Purchase. The New Financing
Commitment is substantially similar to, and does not materially differ from, the
Financing Commitment except as set forth in this Amendment.

          Under the terms of the New Financing Commitment, the proceeds of the
New Credit Facility would be used to (i) to fund the purchase of Shares pursuant
to the Offer and the Merger and to pay transaction costs associated therewith,
(ii) to refinance certain indebtedness of Parent and the Company, (iii) to pay
fees and expenses associated with the New Credit Facility, and (iv) to pay the
holders of Senior Notes who have put their Senior Notes as a result of a change
of control of the Company in connection with the Offer and the Merger (the
"Senior Note Repurchase").

          The New Financing Commitment provides that the Interim Loans will rank
pari passu with the New Credit Facility until the date of the Merger and that
following the date of the Merger, the Interim Loans will become junior and
subordinated to the New Credit Facility. The New Financing Commitment further
provides that the Interim Loans may be prepaid to the extent the principal
amount thereof exceeds 101% of the principal amount of the Senior Notes put as a
result of a change of control of the Company plus interest, fees and expenses
paid in connection with the Interim Loans and the Senior Notes.

          The foregoing summary of the Interim Loan Commitment and the New
Financing Commitment does not purport to be complete and is qualified by
reference to such documents, copies of which have been filed as exhibits to this
Amendment.

                                        4
<PAGE>
ITEM 11. MATERIAL TO BE FILED AS EXHIBITS.

          Item 11 is hereby amended and supplemented by adding the following
exhibits thereto:

         (b)(4)   Commitment Letter between Parent and Lehman Commercial Paper,
                  Inc. and Lehman Brothers, Inc., dated as of August 24, 1998.

         (b)(5)   Commitment Letter between Parent and PNC Bank, N.A., dated as
                  of August 24, 1998.

         (g)(1) Text of press release, dated August 26, issued by Parent.

                                        5
<PAGE>
                                    SIGNATURE

After due inquiry and to the best of my knowledge and belief, the undersigned
certifies that the information set forth in this statement is true, complete and
correct.

Dated: August 26, 1998

                              MIDLAND ACQUISITION CORP.



                              By:  /s/ Stephen E. McGregor
                                   ---------------------------------------------
                                   Name:   Stephen E. McGregor
                                   Title:  President and Chief Executive Officer



                              KEY ENERGY GROUP, INC.



                              By:  /s/ Francis D. John
                                   ---------------------------------------------
                                   Name:   Francis D. John
                                   Title:  Chairman, President and
                                             Chief Executive Officer

                                        6
<PAGE>
                                  EXHIBIT INDEX

(a)  (1)  Offer to Purchase, dated August 17, 1998.

     (2)  Letter of Transmittal.

     (3)  Notice of Guaranteed Delivery.

     (4)  Letter from the Dealer Manager to Brokers, Dealers, Commercial Banks,
          Trust companies and other Nominees.

     (5)  Letter to clients for use by Brokers, Dealers, Commercial Banks, Trust
          companies and other Nominees.

     (6)  Guidelines for Certification of Taxpayer Identification Number on
          Substitute Form W-9.

     (7)  Summary Advertisement as published on August 17, 1998.

     (8)  Text of Press Release, dated August 11, 1998, issued by Parent
          (incorporated by reference to Amendment No. 4 of the Schedule 13D,
          filed by Parent and the Purchaser on August 12, 1998).

     (9)  Text of Press Release, dated August 17, 1998, issued by Parent.

(b)  (1)  Commitment Letter between Parent and PNC Bank, N.A., dated as of
          August 17, 1998.

     (2)  Engagement Letter between Parent and Bear, Stearns & Co. Inc., dated
          as of May 8, 1998.

     (3)  Engagement Letter between Parent and Dain Rauscher Wessels, dated as
          of July 2, 1998.

     (4)  Commitment Letter between Parent and Lehman Commercial Paper, Inc. and
          Lehman Brothers, Inc., dated as of August 24, 1998.*

     (5)  Commitment Letter between Parent and PNC Bank, N.A., dated as of
          August 24, 1998.*

(c)  (1)  Agreement and Plan of Merger, dated as of August 11, 1998 by and among
          Parent, the Purchaser and the Company (incorporated by reference to

                                       7
<PAGE>
          Amendment No. 4 of the Schedule 13D, filed by Parent and the Purchaser
          on or about August 12, 1998).

     (2)  Confidentiality Agreement, dated as of August 8, 1998 by and among
          Parent, the Purchaser and the Company.

(d)  Not applicable.

(e)  Not applicable.

(f)  Not applicable.

(g)  (1)  Text of press release, dated August 26, issued by Parent.*

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

*    Filed herewith.

                                        8

     LEHMAN COMMERCIAL PAPER INC.                 Lehman Brothers Inc.
     3 WORLD FINANCIAL CENTER                     3 World Financial Center
     NEW YORK, NEW YORK  10285                    New York, New York  10285


                                 August 25 1998

                                COMMITMENT LETTER


Board of Directors
Key Energy Group, Inc.


Ladies and Gentlemen:

          This commitment letter agreement (together with all exhibits and
schedules hereto, this "Commitment Letter") will confirm the understanding and
agreement among Lehman Commercial Paper Inc., as Administrative Agent ("LCPI" or
the "Administrative Agent"), Lehman Brothers Inc., as exclusive advisor and
arranger under the Interim Loan Agreement referred to below ("Lehman Brothers"),
Key Energy Group, Inc. (together with each of its subsidiaries, the "Company"),
in connection with the proposed acquisition of Dawson Production Services, Inc.
(together with each of its subsidiaries, the "Acquired Business"). We understand
that the Company proposes to sign an agreement (the "Acquisition Agreement")
pursuant to which the Company will commence a tender offer (the "Tender Offer")
to acquire all of the issued and outstanding common stock of the Acquired
Business (the "Acquisition") and in connection with the Acquisition, the
Acquired Business will merge with and into the Company and will no longer be a
subsidiary of the Company (the "Merger").

          You have advised us that the total purchase price for the Acquisition
(including fees and expenses (which will not exceed $25 million) and the
refinancing of approximately $350 million of existing debt of the Company and
the Acquired Business, including the repurchase (the "Dawson Note Repurchase")
of up to $140 million aggregate principal amount of 9 3/8% Senior Notes due 2007
(the "Dawson Notes") of the Acquired Business at a purchase price of 101% of the
principal amount thereof plus accrued interest upon a Change of Control (as
defined in the Indenture governing the Dawson Notes) (a "Dawson Change of
Control")), will be approximately $625 million and that the Acquisition (and the
refinancing of such debt) and the payment of such fees and expenses will be
financed with (i) $475 million of borrowings by the Company under a facility
(the "Senior Credit Facility") among the Company, PNC Bank, N.A. ("PNC") and the
financial institutions party thereto and (ii) the issuance by the Company of
$150 million in aggregate principal amount of Senior or Senior Subordinated
Notes due 2008 (the "Permanent Securities"). Following the Acquisition and the
Merger, the Company and the Acquired Business will have no debt (except as
described above and except for $216 million in aggregate principal amount of
convertible subordinated notes due 2004 issued by the Company (the "Convertible
Notes")) and the Acquired Business will merge with and into the Company and will
no longer be a subsidiary of the Company.

          1. The Commitments. You have requested that LCPI and/or one or more
affiliates of LCPI to be designated by LCPI in its sole discretion and/or any
lenders who become party to this Commitment Letter by assignment in accordance
with Section 6 (collectively, the "Interim Lenders") commit to provide the
Company up to $150 million in interim loans (the "Interim Loans"), having the
<PAGE>
terms set forth on Exhibit A hereto, which Interim Loans may be drawn at the
time of payment for the Tender Offer in lieu of initially issuing Permanent
Securities. The Interim Loans will be senior secured Interim Loans from the date
of funding thereof until the date of the Merger, ranking pari passu with the
Senior Credit Facility, and the Interim Loans will be senior subordinated
Interim Loans, from and after the date of the Merger (if the Merger occurs) or
if such funding occurs on or after the date of the Merger.

          Based on the foregoing and in reliance on an Engagement Letter, each
of the Interim Lenders is pleased to confirm by this Commitment Letter its
respective commitment to you (each, a "Commitment" and, collectively, the
"Commitments"), severally and not jointly, to provide or cause one of its
affiliates to provide an Interim Loan in the amount set forth opposite its name
on Schedule 1 hereto pursuant to a loan agreement (the "Interim Loan Agreement")
containing the terms, conditions and other provisions set forth on Exhibit A
hereto. Notwithstanding the above, you understand that each Interim Lender's
obligation to provide Interim Loans is expressly subject to the terms and
conditions set forth herein and will exist only upon the execution and delivery
of definitive documentation, including, without limitation, the Interim Loan
Agreement, satisfactory to the Administrative Agent and its counsel, and the
satisfaction of the terms, covenants and conditions contained therein. You
further agree that if LCPI determines in its sole discretion that it would be
advisable to structure the Interim Loans as securities to facilitate syndication
of the Commitments or for any other reason, that the documentation contemplated
by this Commitment Letter will be appropriately modified to provide for an
issuance of senior interim notes having terms as nearly identical as practicable
to those of the Interim Loans.

          2. Fees and Expenses. In consideration of the execution and delivery
of this Commitment Letter by each of the Interim Lenders, you agree to pay the
fees contemplated by the Fee Letter dated the date hereof.

          3. Indemnification The Company hereby agrees to indemnify and hold
harmless each of the Interim Lenders and each of their respective officers,
directors, employees, advisors and agents (each, an "Indemnified Person") from
and against any and all losses, claims, damages and liabilities to which any
such indemnified person may become subject arising out of or in connection with
this Commitment Letter, the Interim Loans, the use of the proceeds therefrom,
the Acquisition or any of the other transactions contemplated by this Commitment
Letter or the term sheet attached as Exhibit A hereto or any claim, litigation,
investigation or proceeding relating to any of the foregoing, regardless of
whether any indemnified person is a party thereto, and to reimburse each
indemnified person upon demand for all legal and other expenses reasonably
incurred by it in connection with investigating, preparing to defend or
defending, or providing evidence in or preparing to serve or serving as a
witness with respect to, any lawsuits, investigations, claims or other
proceedings relating to any of the foregoing (including, without limitation, in
connection with the enforcement of the indemnification obligations set forth
herein); provided, however, that no indemnified person shall be entitled to
indemnity hereunder in respect of any loss, claim, damage, liability or expense
to the extent that it is finally judicially determined that such loss, claim,
damage, liability or expense resulted directly from the gross negligence or
willful misconduct of such indemnified person.

          The Company further agrees that, without the prior written consent of
each of the Interim Lenders, which consent will not be unreasonably withheld, it
will not enter into any settlement of a lawsuit, claim or other proceeding
arising out of this Commitment Letter or the transactions contemplated by this
Commitment Letter unless such settlement includes an explicit and unconditional
release from the party bringing such lawsuit, claim or other proceeding of all
indemnified persons.

                                       2
<PAGE>
          In case any action or proceeding shall be instituted involving any
indemnified person for which indemnification is to be sought hereunder by such
indemnified person, then such indemnified person shall promptly notify the
Company of the commencement of such action or proceeding; provided, however,
that the failure so to notify the Company shall not relieve the Company from any
liability that they may have to such indemnified person pursuant to this Section
3 or from any liability that they may have to such indemnified person other than
pursuant to this Section 3. Notwithstanding the above, following such
notification, the Company may elect in writing to assume the defense of such
action or proceeding, and, upon such election, it shall not be liable for any
legal costs subsequently incurred by such indemnified person (other than
reasonable costs of investigation and providing evidence) in connection
therewith, unless (i) it has failed to provide counsel reasonably satisfactory
to such indemnified person in a timely manner, (ii) counsel provided by the
Company reasonably determines that its representation of such indemnified person
would present it with a conflict of interest or (iii) the indemnified person
reasonably determines that there may be legal defenses available to it which are
different the Company shall not be responsible for the fees and expenses of more
than one separate law firm (in addition to local counsel) for all indemnified
persons.

          The Company and the Interim Lenders agree that if any indemnification
or reimbursement sought pursuant to this Section 3 is judicially determined to
be unavailable for a reason other than the gross negligence or willful
misconduct of an indemnified person, then, whether or not an Interim Lender is
the indemnified person, the Company, on the one hand, and the Interim Lenders,
on the other hand (pro rata in accordance with their respective Commitments),
shall contribute to the losses, claims, damages, liabilities and expenses for
which such indemnification or reimbursement is held unavailable (i) in such
proportion as is appropriate to reflect the relative benefits to the Company, on
the one hand, and the Interim Lenders, on the other hand, in connection with the
transactions to which such indemnification or reimbursement relates, or (ii) if
the allocation provided by clause (i) above is judicially determined not to be
permitted, in such proportion as is appropriate to reflect not only the relative
benefits referred to in clause (i) but also the relative faults of the Company,
on the one hand, and the Interim Lenders, on the other hand, as well as any
other equitable considerations; provided, however, that in no event shall the
amount to be contributed by an Interim Lender pursuant to this paragraph exceed
the amount of the fees actually received by such Interim Lender under this
Commitment Letter .

          4. Expiration of Commitment. The Commitments shall expire at 5:00
p.m., New York City time, on August 26, 1998 unless you shall have executed and
returned a copy of this Commitment Letter and the Fee Letter to the Interim
Lenders prior to the expiration of the Commitments and paid the commitment fee
contemplated by the Fee Letter, which will follow in which event each Interim
Lender agrees to hold its respective Commitment available for you until the
earlier of (i) the termination of the Acquisition Agreement, (ii) the payment
for the Tender Offer without the funding of any Interim Loans and (iii) 5:00
p.m., New York City time, on December 31, 1998. The date and time of expiration
of the Commitments is sometimes referred to herein as the "Commitment Expiration
Date."

          5. Confidentiality. This Commitment Letter and the terms and
conditions contained herein shall not be disclosed by the Company to any person
or entity (other than the Acquired Business and such of your and their agents
and advisers as need to know and agree to be bound by the provisions of this
paragraph) without the prior written consent of the Interim Lenders.

          6. Assignment and Syndication. The parties hereto agree that LCPI
shall have the right to arrange for other banks, financial institutions or other
financial investors (including, without limitation, each affiliate and
beneficial owner of LCPI or Strategic Resource Partners Fund ("SRP"), any entity
that acquires substantially all of the business or assets of LCPI or SRP and

                                       3
<PAGE>
each entity with whom SRP or any of its affiliates has entered into an
arrangement with respect to the syndication of interim loans (collectively,
"Permitted Assignees")) to directly provide a portion of the Commitments and
become an Interim Lender under this Commitment Letter, subject to the Company's
prior approval (which may not be unreasonably withheld) only in the case of
entities that are not Permitted Assignees. In any such case, LCPI, Lehman
Brothers or a designee of LCPI would act as arranger, underwriter and sole
syndication agent (in such capacity, the "Syndication Agent"). The Syndication
Agent would manage all aspects of any such syndication, including the timing of
all offers to potential Interim Lenders, the acceptance of commitments, the
amounts offered, the amounts allocated and the compensation provided, and the
Company agree to use their best efforts to assist the Syndication Agent in such
syndication process, including, without limitation, preparing disclosure
materials, meeting with prospective lenders, arranging for the management of the
Acquired Business to meet with prospective lenders and providing such
information as the Syndication Agent shall reasonably request during the course
of such process. The Company may not assign any of its respective rights, or be
relieved of any of its obligations, without the prior written consent of each of
the Interim Lenders. In connection with any syndication of all or a portion of
the Commitments, the rights and obligations of each of the Interim Lenders
hereunder may be assigned by such Interim Lender, in whole or in part, as
provided above, and upon such assignment, such Interim Lender shall be relieved
and novated hereunder from the obligations of such Interim Lender with respect
to any portion of its Commitment that has been assigned as provided above. LCPI
intends to consult with PNC, as agent for the Senior Credit Facility, with
respect to such syndication.

          SRP is a Delaware business trust managed by an affiliate of Lehman
Brothers. SRP's Certificate of Trust is on file with the Secretary of State of
the State of Delaware. All persons dealing with SRP, because it is a Delaware
statutory business trust, must look solely to the series (within the meaning
given to such term by Section 3806(b)(2) of the Delaware Business Trust Act) of
ownership interests in SRP evidencing ownership by SRP of Interim Loans for the
enforcement of any claims against SRP arising by reason of or in connection with
such interest. None of the manager, the adviser, the trustee, the beneficial
owners or other agents of SRP assumes any personal liability in connection with
the business of SRP or for obligations entered into on behalf of SRP.

          7. Survival. The provisions of this Commitment Letter relating to the
payment of fees and expenses, indemnification and contribution and
confidentiality and the provisions of Section 8 below will survive the
expiration or termination of this Commitment Letter (including any extensions
thereof).

          8. Choice of Law; Jurisdiction; Waivers. This Commitment Letter shall
be governed by and construed in accordance with the laws of the State of New
York, without giving effect to the principles of conflicts of laws thereof. To
the fullest extent permitted by applicable law, the Company hereby irrevocably
submits to the jurisdiction of any New York State court or Federal court sitting
in the County of New York in respect of any suit, action or proceeding arising
out of or relating to the provisions of this Commitment Letter and irrevocably
agrees that all claims in respect of any such suit, action or proceeding may be
heard and determined in any such court. The Company hereby waives, to the
fullest extent permitted by applicable law, any objection that it may now or
hereafter have to the laying of venue of any such suit, action or proceeding
brought in any such court, and any claim that any such suit, action or
proceeding brought in any such court has been brought in an inconvenient forum.
The Company hereby waives, to the fullest extent permitted by applicable law,
any right to trial by jury with respect to any action or proceeding arising out
of or relating to this Commitment Letter.

          9. Miscellaneous. This Commitment Letter may be executed in one or
more counterparts, each of which will be deemed an original, but all of which
taken together will constitute one and the same instrument.

                                       4
<PAGE>
          This Commitment Letter and the attached Exhibits A and B set forth the
entire understanding of the parties hereto as to the scope of the Commitment and
the obligations of the Interim Lenders hereunder. This Commitment Letter shall
supersede all prior understandings and proposals, whether written or oral,
between the Interim Lenders and you relating to any financing or the
transactions contemplated hereby.

          This Commitment Letter has been and is made solely for the benefit of
the Company, the Interim Lenders, the indemnified persons, and their respective
successors and assigns, and nothing in this Commitment Letter, expressed or
implied, is intended to confer or does confer on any other person or entity any
rights or remedies under or by reason of this Commitment Letter or the
agreements of the parties contained herein.

          As you know, beneficial owners and affiliates of SRP, including Lehman
Brothers, are full service financial firms and as such from time to time may
effect transactions for their own account or the account of customers, and hold
long or short positions in debt or equity securities or loans of companies that
may be the subject of the transactions contemplated by this Commitment Letter.

                            [Signature Page Follows]

                                       5
<PAGE>
                       [Commitment Letter-Signature Page]

          If you are in agreement with the foregoing, kindly sign and return to
us the enclosed copy of this Commitment Letter.

                                        Very truly yours,

                                        LEHMAN COMMERCIAL PAPER INC.



                                        By:  /s/ Christopher Ryan
                                             ---------------------------
                                             Name: Christopher Ryan
                                             Title: Authorized Signatory


                                        LEHMAN BROTHERS INC.



                                        By:  /s/ Michael J. Konigsberg
                                             ---------------------------
                                             Name: Michael J. Konigsberg
                                             Title: Managing Director


Accepted and agreed to as of the
date first above written:

KEY ENERGY GROUP, INC.



By:  /s/ Stephen E. McGregor
     -----------------------
     Name: Stephen E. McGregor
     Title: EVP & CFO

                                       6
<PAGE>
                         EXHIBIT A TO COMMITMENT LETTER
                         ------------------------------

          SUMMARY OF TERMS OF INTERIM LOANS AND INTERIM LOAN AGREEMENT
          ------------------------------------------------------------

          Set forth below is a summary of certain of the terms of the Interim
Loans and the Interim Loan Agreement. The Commitment of the Interim Lenders to
provide the Interim Loans is subject expressly to the negotiation, execution and
delivery of definitive documentation, including, without limitation, an Interim
Loan Agreement and other appropriate Loan Documents, satisfactory to Lehman
Brothers and its counsel, which will contain the terms, conditions and other
provisions set forth herein and such other representations, warranties,
covenants, events of default and other provisions as are customary for
financings of this kind or deemed appropriate by the Interim Lenders for this
transaction in particular (in their sole discretion). Capitalized terms used and
not otherwise defined herein have the meanings set forth in the Commitment
Letter to which this Summary of Terms is attached and of which it forms a part.


Borrower                           The Company.

Arranger                           Lehman Brothers.

Administrative Agent               Lehman Commercial Paper Inc. ("LCPI").

Loans                              $150 million of Senior Secured Increasing
                                   Rate Loans due 1999, if the date of funding
                                   occurs prior to the Merger, or $150 million
                                   of Senior Subordinated Increasing Rate Loans
                                   due 1999, if the date of funding occurs on or
                                   after the date of the Merger (the "Interim
                                   Loans").

Use of Proceeds                    Proceeds from the Interim Loans will be used
                                   solely to consummate the Acquisition (and to
                                   pay related amounts).

Maturity                           365 days from the date of initial funding
                                   (the "Maturity Date"). The initial date of
                                   funding of the Interim Loans is hereinafter
                                   referred to as the "Closing Date," which
                                   shall be no later than December 31 1998.

Subordination                      Following the Merger, if it occurs, the
                                   Interim Loans will be subordinated in right
                                   of payment to the payment in full of all
                                   obligations of the Company under the Senior
                                   Credit Facility and certain refinancings
                                   thereof, on terms satisfactory to the Interim
                                   Lenders in their sole discretion. The Company
                                   will not be permitted to incur any
                                   indebtedness that is subordinated to the
                                   borrowings under the Senior Credit Facility
                                   and senior to other indebtedness of the
                                   Company. The Interim Notes in all cases will
                                   rank senior in right of payment to the
                                   Convertible Notes. Prior to the Merger, if
                                   any Interim Loans are outstanding, the
                                   Interim Loans will not be subordinated to any
                                   other indebtedness.

Mandatory Rollover                 If (i) the Interim Loans are not repaid in
                                   full on or prior to the Maturity Date and
                                   (ii) the conditions precedent set forth in

                                    A-1
<PAGE>
                                   Exhibit B to the Commitment Letter are
                                   satisfied, then the Interim Loans will be
                                   automatically converted on the Maturity Date
                                   into term loans due 2008 of the Company (the
                                   "Term Loans") in an aggregate principal
                                   amount equal to the aggregate senior
                                   principal amount of Interim Loans so
                                   converted. The Term Loans will have the terms
                                   set forth in Exhibit B attached hereto. Term
                                   Loans may be exchanged by the holders thereof
                                   for Exchange Notes. The Exchange Notes will
                                   be issued, undated, on the Closing Date and
                                   placed in an escrow account and held by a
                                   mutually agreeable fiduciary pending such
                                   mandatory exchange.

Interest                           The Interim Loans will bear interest at a
                                   variable per annum rate equal to the sum of
                                   (a) a base rate to be selected by the
                                   Administrative Agent on the date of funding
                                   equal to the one- or three-month London
                                   Interbank Offered Rate, reset monthly or
                                   quarterly, as the case may be (the "LIBOR
                                   Option"), calculated on the basis of the
                                   actual number of days elapsed in a year of
                                   360 days, plus (b) a spread (the "Spread")
                                   equal to 550 basis points. The Spread will
                                   increase by 50 basis points upon the 180-day
                                   anniversary of the date of issuance of the
                                   Interim Loans and by an additional 50 basis
                                   points on each 90-day anniversary thereafter.
                                   The interest rate on the Interim Loans will
                                   not exceed 17% per annum. To the extent that
                                   the total interest payable on the Interim
                                   Loans on any interest payment date exceeds
                                   14% per annum, the Company shall have the
                                   option to pay such excess interest by
                                   capitalizing such interest as additional
                                   Interim Loans. Interest will be payable
                                   quarterly, in arrears, on the Maturity Date
                                   and on the date of any prepayment of the
                                   Interim Loans. Notwithstanding the foregoing,
                                   interest will accrue on any overdue amount
                                   (whether interest or principal), to the
                                   extent lawful, at a rate per annum equal to
                                   200 basis points over the then current
                                   interest rate on the Interim Loans, until
                                   such amount (plus all accrued and unpaid
                                   interest) is paid in full. For Interim Loans
                                   outstanding after the Maturity Date, interest
                                   will be payable on demand at the default
                                   rate.

Guarantees                         The Interim Loans will be guaranteed by each
                                   affiliate of the Company that guarantees all
                                   or a portion of the indebtedness under the
                                   Senior Credit Facility (the "Guarantors"),
                                   which guarantees will rank in priority on the
                                   same basis as the Interim Loans rank in
                                   priority to the indebtedness under the Senior
                                   Credit Facility. A subsidiary's guarantee
                                   will be released upon the sale of such
                                   subsidiary, subject to use of the proceeds
                                   therefrom to repay Interim Loans and/or
                                   borrowings under the Senior Credit Facility.

Collateral                         If the Closing Date occurs prior to the date
                                   of the Merger, the Interim Loans will,
                                   subject to the provisions set forth under the
                                   heading "The Merger" herein, be secured on an
                                   equal and ratable basis (pursuant to
                                   intercreditor arrangements satisfactory to
                                   the Interim Lenders) with the indebtedness

                                    A-2
<PAGE>
                                   under the Senior Credit Facility by the same
                                   collateral that secures such indebtedness
                                   (the "Collateral").

Mandatory Repayment                Notwithstanding the "Subordination"
                                   provisions set forth above, the Company will
                                   repay Interim Loans with the net proceeds
                                   from (i) any direct or indirect incurrence
                                   (whether by public offering, private
                                   placement or otherwise) of subordinated
                                   indebtedness of the Company or any of the
                                   Guarantors or any equity securities of the
                                   Company, (ii) the incurrence of any other
                                   indebtedness by the Company, or any
                                   subsidiary of the Company (subject to the
                                   requirements of the Senior Credit Facility)
                                   and (iii) any future issuances or sales of
                                   stock of subsidiaries or sales of assets
                                   (subject to customary ordinary course
                                   exceptions and the requirements of the Senior
                                   Credit Facility) by the Company or any
                                   subsidiary of the Company, in each case at
                                   100% of the principal amount of the Interim
                                   Loans repaid, plus accrued fees and all
                                   accrued and unpaid interest and fees to the
                                   date of the repayment. The Senior Credit
                                   Facility will permit 100% of the net proceeds
                                   from the issuance of the subordinated
                                   indebtedness or equity of the Company to be
                                   applied to repay the Interim Loans (as
                                   converted, extended or exchanged), and prior
                                   to the Merger, while the Interim Loans rank
                                   pari passu with the Senior Credit Facility,
                                   the Interim Loans and the indebtedness under
                                   Senior Credit Facility will be prepayable
                                   only on a pro rata pari passu basis. In
                                   addition, concurrent with the payment of
                                   amounts required under the Dawson Change of
                                   Control, the Company shall prepay the Interim
                                   Loans in an amount equal to the difference
                                   between the principal amount of the Interim
                                   Loans funded and the principal, premium and
                                   interest in respect of the Dawson Notes so
                                   purchased.

Change of Control                  Each holder of Interim Loans will be entitled
                                   to require the Company, and the Company must
                                   offer, to repay the Interim Loans held by
                                   such holder at a price of 101% of principal
                                   amount, plus accrued fees and all accrued and
                                   unpaid interest to the date of repayment,
                                   upon the occurrence of a Change of Control
                                   (as defined in the Interim Loan Agreement).
                                   The Interim Loan Agreement will require that
                                   the Company, prior to complying with the
                                   above covenant, but in any event within 90
                                   day following a Change of Control, will
                                   either repay all indebtedness under the
                                   Senior Credit Facility or obtain the
                                   requisite consents to permit the repayment of
                                   the Interim Loans.

Optional Repayment                 The Interim Loans may be repaid, in whole or
                                   in part on a pro rata basis, at the option of
                                   the Company at any time upon five business
                                   days' prior written notice at a price equal
                                   to 100% of the principal amount thereof, plus
                                   accrued fees and all accrued and unpaid
                                   interest to the date of repayment.

                                    A-3
<PAGE>
Payments                           Payments by the Company will be made by wire
                                   transfer of immediately available funds.

Transferability                    With the consent of the Administrative Agent
                                   (which consent shall not be unreasonably
                                   withheld), each of the Interim Lenders will
                                   be free to sell or transfer all or any part
                                   of its Interim Loans to any third party and
                                   to pledge any or all of the Interim Loans to
                                   any commercial bank or other institutional
                                   lender. Participations will not require the
                                   consent of the Administrative Agent. Each
                                   Interim Lender will have the absolute and
                                   unconditional right to assign Interim Loans
                                   or any participation therein without the
                                   consent of the Company.

Amendments                         Modifications to the terms of the Interim
                                   Loan Agreement may be made with consent of
                                   the holders of a majority in aggregate
                                   principal amount of the Interim Loans then
                                   outstanding, except that without the consent
                                   of each holder of Interim Loans affected
                                   thereby, no modification or change may (i)
                                   extend the maturity or time of payment of
                                   interest of any Interim Loans, (ii) reduce
                                   the rate of interest or the principal amount
                                   of any Interim Loans, (iii) alter the
                                   repayment provisions of the Interim Loans, or
                                   reduce the percentage of holders necessary to
                                   modify or change the Interim Loans.

Cost and Yield Protection          The Interim Lenders shall receive cost and
                                   yield protection customary for facilities and
                                   transactions of this type, including but not
                                   limited to breakage costs incurred in
                                   connection with any repayment of the Interim
                                   Loans on a day other than the last day of an
                                   interest period, compensation in respect of
                                   prepayments, taxes (including but not limited
                                   to gross-up provisions for withholding taxes
                                   imposed by any domestic or foreign
                                   governmental authority, including taxes
                                   relating to gross-up payments), changes in
                                   capital requirements, guidelines or policies
                                   or their interpretation or application,
                                   illegality, change in circumstances, reserves
                                   and other provisions deemed necessary by the
                                   Interim Lenders to provide customary
                                   protection for U.S. and non-U.S. financial
                                   institutions.

Representations and Warranties     The Interim Loan Agreement will contain such
                                   representations and warranties of the Company
                                   and the Guarantors as are customary for
                                   financings of this kind or deemed appropriate
                                   by the Interim Lenders for this transaction
                                   in particular (in their sole discretion).

Covenants                          The Interim Loan Agreement will contain such
                                   covenants of the Company and the Guarantors
                                   as are usual and customary for financings of
                                   this kind or as are otherwise deemed
                                   appropriate by the Interim Lenders for this
                                   transaction in particular (in their sole
                                   discretion.

                                    A-4
<PAGE>
Conditions Precedent               The obligation of each of the Interim Lenders
                                   to provide, or cause one of its affiliates to
                                   maintain, a commitment to fund the Interim
                                   Loans will be subject to the condition that
                                   the following conditions (the "Tender Offer
                                   Conditions") must be satisfied at the time of
                                   funding which shall be the closing of the
                                   Tender Offer. The Tender Offer Conditions
                                   will be conditions that are customary for
                                   closing financings of this kind or deemed
                                   appropriate by the Interim Lenders for this
                                   transaction in particular (in their sole
                                   discretion), including, without limitation,
                                   the following closing conditions:

                                   1.   Concurrent Transactions. The Company
                                        shall purchase at the closing of the
                                        Tender Offer a sufficient number of
                                        shares to cause the merger to occur. All
                                        conditions precedent to borrowings under
                                        the Senior Credit Facility shall have
                                        been satisfied or, with the prior
                                        approval of the Administrative Agent,
                                        waived, and the Company shall borrow
                                        funds under the Senior Credit Facility,
                                        which, together with the proceeds of the
                                        Interim Loans, will be sufficient to
                                        consummate the Tender Offer and pay all
                                        related fees and expenses. The terms and
                                        conditions of the Tender Offer and the
                                        Acquisition Agreement shall not be
                                        modified in a way which is not
                                        satisfactory to the Interim Lenders. A
                                        Dawson Change of Control shall have
                                        occurred and be continuing, there shall
                                        be available under the Senior Credit
                                        Facility sufficient amounts to fund the
                                        Dawson Change of Control in its entirety
                                        and to pay the other unfunded amounts
                                        required in connection with the
                                        Acquisition, and the Company shall have
                                        given notice of its offer to repurchase
                                        the Dawson Notes promptly (within the
                                        requirements of the indenture for the
                                        Dawson Notes) upon the occurrence of
                                        such Dawson Change of Control, There
                                        shall not exist (pro forma for the
                                        Acquisition and the financing thereof)
                                        any default or event of default under
                                        the Senior Credit Facility, the Interim
                                        Loan Agreement, or under any other
                                        material indebtedness or agreement of
                                        the Company or the Acquired Business.
                                        The capitalization and corporate and
                                        ownership structure of the Company
                                        before and after the Acquisition and the
                                        financing thereof shall be satisfactory
                                        to the Interim Lenders in all respects.
                                        The Company and the Acquired Business
                                        shall not have any outstanding debt
                                        other than as described in the first
                                        paragraph of the Commitment Letter.

                                   2.   Concurrence with Assumptions. The
                                        concurrence by the Interim Lenders (in
                                        their sole discretion) with the
                                        operating and financial assumptions used
                                        in preparing the combined pro forma
                                        historical and projected performance of
                                        the Company after giving effect to the
                                        Acquisition.

                                       A-5
<PAGE>
                                   3.   Absence of Certain Changes. No material
                                        adverse change in the consolidated
                                        financial condition, results of
                                        operations, business, assets,
                                        liabilities, management, prospects or
                                        value of the Company or the Acquired
                                        Business (including any event which, in
                                        the opinion of the Interim Lenders, is
                                        likely to result in such a material
                                        adverse change) shall have occurred
                                        since the date of the most recent
                                        audited financial statements that have
                                        been delivered to the Interim Lenders as
                                        of the date hereof as to make it, in the
                                        reasonable judgment of Lehman Brothers,
                                        impractical or inadvisable to proceed
                                        with the funding of the Interim Loans on
                                        the Closing Date pursuant to the terms
                                        contemplated herein. No material
                                        inaccuracy in such financial statements
                                        shall exist. The Company and the
                                        Acquired Business shall have no material
                                        liabilities except (i) those set forth
                                        on the most recent audited balance
                                        sheets of such entities provided to the
                                        Interim Lenders as of the date hereof
                                        and (ii) those incurred in the ordinary
                                        course of business (and consistent with
                                        past practice) since such date.

                                   4.   Documentation, Legal Matters, etc. All
                                        matters relating to the transactions
                                        contemplated hereby, the Senior Credit
                                        Facility and the transactions
                                        contemplated thereby shall be
                                        satisfactory to each of the Interim
                                        Lenders in all respects, and each of the
                                        Interim Lenders shall have received such
                                        additional certificates, legal and other
                                        opinions (including with respect to
                                        solvency) and documentation as it shall
                                        request.

                                   5.   Market Disruption. There shall not have
                                        occurred any of the following: (i)
                                        trading in securities generally on the
                                        New York Stock Exchange or The Nasdaq
                                        Stock Market's National Market or in the
                                        over-the-counter market shall have been
                                        suspended or materially limited, or
                                        minimum prices shall have been
                                        established on such exchange by the
                                        Securities and Exchange Commission, or
                                        by such exchange or by any other
                                        regulatory body or governmental
                                        authority having jurisdiction, (ii) a
                                        banking moratorium shall have been
                                        declared by Federal or state
                                        authorities, (iii) the United States
                                        shall have become engaged in
                                        hostilities, there shall have been any
                                        escalation in hostilities involving the
                                        United States or there shall have been
                                        declared a national emergency or war by
                                        the United States, (iv) a disruption or
                                        adverse change in the financial or
                                        capital markets generally, in the market
                                        for new issues of high yield debt or
                                        equity securities in particular or (v) a
                                        material adverse change in the general
                                        economic, political or financial
                                        conditions (or the effect of
                                        international conditions on the
                                        financial markets in the United States
                                        shall be such) as to make it, in the

                                       A-6
<PAGE>
                                        reasonable judgment of Lehman Brothers,
                                        impracticable or inadvisable to proceed
                                        with the funding of the Interim Loans on
                                        the Closing Date pursuant to the terms
                                        contemplated herein.

                                   6.   Net Capital. There shall not have
                                        occurred any change in law or regulation
                                        (or interpretation thereof) that could
                                        result in any Interim Lender's
                                        commitment to provide, or any Interim
                                        Lender's providing, the financing
                                        contemplated by the Interim Loan
                                        Agreement being a charge to the net
                                        capital of such Interim Lender's parent
                                        or affiliate.

                                   7.   Environmental Audit. The Interim Lenders
                                        shall have received environmental
                                        reports with respect to the real
                                        property owned or leased by the Company,
                                        any of its subsidiaries or the Acquired
                                        Business and their respective operations
                                        from a firm satisfactory to the
                                        Administrative Agent, in its sole
                                        discretion, and the Interim Lenders
                                        shall be satisfied with the results of
                                        such reports, in their sole discretion.

                                   8.   Financial Statements. The Interim
                                        Lenders shall have received all audited
                                        and unaudited historical financial
                                        statements of the Company, the
                                        Guarantors and the Acquired Business and
                                        all other completed or probable
                                        acquisitions (including pro forma
                                        financial statements) meeting the
                                        requirements of Regulation S- X for a
                                        Form S-1 registration statement under
                                        the Securities Act of 1933, as amended,
                                        and all such financial statements shall
                                        be satisfactory in form and substance to
                                        the Interim Lenders, in their sole
                                        discretion.

                                   9.   Compliance With Other Agreements. The
                                        Company shall have complied with all of
                                        their obligations under the Fee Letter
                                        and the Engagement Letter.

                                   10.  Solvency. The Interim Lenders shall have
                                        received a satisfactory solvency
                                        analysis from the chief financial
                                        officer of the Company which shall
                                        document the solvency of the Company and
                                        its subsidiaries after giving effect to
                                        the Acquisition and the other
                                        transactions contemplated hereby.

                                   11.  Approvals and Consents. All
                                        governmental, quasi-governmental,
                                        shareholder and third-party approvals
                                        and consents necessary or desirable in
                                        connection with the transactions
                                        contemplated hereby and the financing
                                        thereof shall have been received and
                                        shall be in full force and effect.

                                       A-7
<PAGE>
                                   12.  Availability under Senior Credit
                                        Facility. After giving effect to the
                                        consummation of the Tender Offer, the
                                        amount undrawn and available to the
                                        Company under the Senior Credit Facility
                                        shall be sufficient to fund the Merger,
                                        the Dawson Change of Control in its
                                        entirety, to refinance indebtedness
                                        required to be refinanced, to pay
                                        related transaction fees and costs and
                                        otherwise satisfactory to the
                                        Administrative Agent, in its sole
                                        discretion.

                                   13.  Legal Opinions. The Interim Lenders
                                        shall have received such legal opinions
                                        as the Administrative Agent may request
                                        relating to the Company and its
                                        subsidiaries and the Acquired Business
                                        in form and substance satisfactory the
                                        Interim Lenders, in their sole
                                        discretion.

                                   14.  Payment of Fees and Expenses. All fees
                                        and expenses due to any Interim Lender
                                        or Lehman Brothers on or before the
                                        Closing Date in connection with the
                                        Interim Loans shall have been paid in
                                        full.

Events of Default; Remedies        The Interim Loan Agreement will contain such
                                   events of default that are similar to the
                                   events of default under the Senior Credit
                                   Facility and such others as are customary for
                                   financings of this kind or deemed appropriate
                                   by the Interim Lenders for this transaction
                                   in particular (in their sole discretion),
                                   including, without limitation, compliance
                                   with the Fee Letter. If the Company fails to
                                   comply with the provisions of Sections 2 and
                                   3 of the Fee Letter in any material respect
                                   at any time, then the Interim Lenders shall
                                   be entitled to unilaterally amend the
                                   provisions of the Interim Loan Agreement (and
                                   related documents) relating to interest rate,
                                   optional redemption, maturity, warrants and
                                   registration rights so as to reflect the
                                   terms of the Permanent Securities that would
                                   have been issued in accordance with Sections
                                   2 and 3 of the Fee Letter had the Company
                                   complied therewith.

The Merger                         If the Closing Date occurs prior to the date
                                   of the Merger, upon the effectiveness of the
                                   Merger in accordance with applicable law, the
                                   Collateral will be released and the Interim
                                   Loans will become senior subordinated Interim
                                   Loans in accordance with the provisions set
                                   forth under the heading "Subordination"
                                   herein.

Governing Law                      New York.

                                    A-8
<PAGE>
                                 EXHIBIT B
                                 ---------

             SUMMARY OF TERMS OF TERM LOANS AND EXCHANGE NOTES
             -------------------------------------------------

Capitalized terms used but not defined herein have the meanings assigned to them
in the Commitment Letter to which this Exhibit B is attached.

Borrower                           The Company.

Term Loans                         On the Maturity Date, subject to satisfaction
                                   of the conditions set forth below, the
                                   outstanding Interim Loans will be
                                   automatically converted into Term Loans. The
                                   Term Loans will be governed by the provisions
                                   of the Interim Loan Agreement and, except as
                                   expressly set forth below, shall have the
                                   same terms as the Interim Loans as of the
                                   Maturity Date.

Exchange Notes                     At any time on or after the Maturity Date,
                                   the Term Loans may, at the option of a holder
                                   thereof and with the consent of the
                                   Administrative Agent, be exchanged for an
                                   Exchange Note having a ranking and principal
                                   amount equal to the ranking and principal
                                   amount of the Term Loan for which it is
                                   exchanged.

                                   The Company will issue Exchange Notes under
                                   an indenture that complies with the Trust
                                   Indenture Act of 1939, as amended (the
                                   "Indenture"). The Company will appoint a
                                   trustee reasonably acceptable to the
                                   Administrative Agent. The Exchange Notes and
                                   the Indenture will be fully executed and
                                   deposited into escrow at the closing of the
                                   Interim Loans

Maturity                           The Term Loans and the Exchange Notes will
                                   mature on the ninth anniversary of the
                                   Maturity Date (the "Final Maturity Date").

Conditions Precedent               The obligation of each of the Interim Lenders
                                   to convert the Interim Loans to Term Loans
                                   will be subject to the following conditions:

                                   1.   No Defaults. No event of default, or
                                        event which with the giving of notice or
                                        the lapse of time, or both, shall have
                                        occurred and be continuing under the
                                        Interim Loan Agreement or any other Loan
                                        Document and no payment default shall
                                        have occurred and be continuing under
                                        the Senior Credit Facility.

                                   2.   Payment of Fees and Accrued Interest.
                                        The Company shall have paid in
                                        immediately available funds all accrued
                                        and unpaid interest with respect to the
                                        Interim Loans and all fees then due and
                                        owing, in accordance with the terms of
                                        the Loan Documents.

                                    B-1
<PAGE>
                                   3.   Shelf Registration. The Shelf
                                        Registration Statement (as defined under
                                        the heading "Registration Rights" below)
                                        with respect to the Exchange Notes shall
                                        have been filed with the Securities and
                                        Exchange Commission.

Interest Rate                      The Term Loans and the Exchange Notes will
                                   bear interest at a fixed increasing rate
                                   equal to the Initial Rollover Rate (as
                                   defined below) plus the Rollover Spread (as
                                   defined below). The interest rate in effect
                                   at any time shall not exceed 17% per annum.
                                   To the extent interest payable on the Term
                                   Loans or the Exchange Notes on any quarterly
                                   interest payment date is at a rate that
                                   exceeds 14% per annum, the Company shall have
                                   the option to pay such excess interest (i) by
                                   capitalizing such interest as additional Term
                                   Loans, in the case of the Term Loans, and
                                   (ii) by issuing additional Exchange Notes
                                   having a principal amount equal to the amount
                                   of such interest, in the case of Exchange
                                   Notes. Notwithstanding the foregoing,
                                   interest will accrue on any overdue amount
                                   (whether interest or principal), to the
                                   extent lawful, at a rate per annum equal to
                                   200 basis points over the then current
                                   interest rate, until such amount (plus all
                                   accrued and unpaid interest) is paid in full.

                                   "Initial Rollover Rate" shall be determined
                                   as of the Maturity Date of the Interim Loans
                                   and shall equal the interest rate borne by
                                   the Interim Loans on the day immediately
                                   preceding the Maturity Date plus 100 basis
                                   points.

                                   "Rollover Spread" shall mean, with respect to
                                   any Term Loans or Exchange Notes, zero basis
                                   points during the 90-day period commencing on
                                   the Maturity Date. The Rollover Spread shall
                                   increase by 100 basis points upon each 90-day
                                   anniversary of the Maturity Date, except with
                                   respect to Exchange Notes as to which the
                                   interest rate has been fixed as provided
                                   below. If any Exchange Note is transferred to
                                   any person other than a person who was an
                                   Interim Lender on the Maturity Date, then the
                                   transferring Interim Lender shall have the
                                   right, upon five days prior notice to the
                                   Company, to unilaterally fix the interest
                                   rate on such Exchange Note at a coupon not
                                   exceeding the then prevailing interest rate
                                   thereon.

                                   Interest on the Term Loans and Exchange Notes
                                   will be payable quarterly in arrears on the
                                   first business day of each fiscal quarter of
                                   the Company, on the Maturity Date of the Term
                                   Loans and Exchange Notes and on the date of
                                   any prepayment thereof.

Subordination                      Same as Interim Loans.

Guarantees                         Same as Interim Loans.

                                    B-2
<PAGE>
Collateral                         Same as Interim Loans.

Mandatory Repayment                Same as Interim Loans, but not applicable to
                                   any Exchange Notes with respect to which the
                                   interest rate was fixed upon the transfer
                                   thereof (as provided above).

Change of Control                  Same as Interim Loans.

Optional Repayment                 Except as set forth below, the Term Loans and
                                   Exchange Notes may be repaid or redeemed, in
                                   whole or in part, at the option of the
                                   Company at any time upon five business days'
                                   prior written notice at a price equal to 100%
                                   of the principal amount thereof, plus accrued
                                   fees and all accrued and unpaid interest to
                                   the date of repayment.

                                   Any Exchange Note with respect to which the
                                   interest rate was fixed upon the transfer
                                   thereof (as provided above) will be entitled
                                   to call protection for a period determined by
                                   the transferring Interim Lender in its sole
                                   discretion at the time such interest rate was
                                   fixed (such non-call period will continue for
                                   at least five years after the Maturity Date).
                                   Thereafter such Exchange Note will be
                                   redeemable at the Company's option, in whole
                                   or in part, at par plus accrued fees and all
                                   accrued and unpaid interest to the date of
                                   redemption plus a premium equal, initially,
                                   to one half of the interest rate applicable
                                   to the Exchange Notes on the Maturity Date
                                   and thereafter declining ratably on each
                                   yearly anniversary by an amount such that one
                                   year prior to the maturity of the Exchange
                                   Notes the premium will equal zero.

Yield Protection                   Same as Interim Loans.

Payments                           Same as Interim Loans.

Covenants                          Similar to the Interim Loans, except certain
                                   covenants may be less restrictive if agreed
                                   upon by the Administrative Agent and the
                                   Company; and provided further that the
                                   covenants for the Exchange Notes (after the
                                   interest rate thereon is fixed and
                                   appropriate call protection is in place)
                                   shall be less restrictive and similar to
                                   covenants that are customary for a high yield
                                   indenture of similar credit.

Events of Default                  Same as Interim Loans, in the case of the
                                   Term Loans. The Exchange Notes will have
                                   events of default that are customary for an
                                   indenture governing a high yield note issue
                                   (but more restrictive in certain respects, as
                                   determined by the Administrative Agent in its
                                   sole discretion).

Transferability                    Unlimited except as otherwise provided by
                                   law.

Defeasance Provisions              None.

                                    B-3
<PAGE>
Amendments                         Same as Interim Loans.

Registration Rights                Prior to the Maturity Date, the Company will
                                   be required to file a shelf registration
                                   statement with respect to the Exchange Notes
                                   (a "Shelf Registration Statement"). The
                                   filing of the Shelf Registration Statement
                                   will be a condition precedent to the
                                   conversion of Interim Loans to Term Loans.
                                   The Company will pay liquidated damages in
                                   the form of increased interest of 50 basis
                                   points on the principal amount of Exchange
                                   Notes outstanding to holders of Exchange
                                   Notes (i) if the Shelf Registration Statement
                                   is not declared effective by the SEC within
                                   60 days of the Maturity Date, until such
                                   Shelf Registration Statement is declared
                                   effective, and (ii) during any period of time
                                   (subject to customary exceptions) following
                                   the effectiveness of the Shelf Registration
                                   Statement that such Shelf Registration
                                   Statement is not available for sales
                                   thereunder. After 12 weeks, the liquidated
                                   damages shall increase by 50 basis points,
                                   and shall increase by 50 basis points for
                                   each 12-week period thereafter to a maximum
                                   increase in interest of 200 basis points
                                   (such damages to be payable in the form of
                                   additional Exchange Notes, if the interest
                                   rate thereon exceeds 14% per annum). In
                                   addition, unless and until the Company has
                                   caused the Shelf Registration Statement to
                                   become effective, the holders of the Exchange
                                   Notes will have the right to "piggy-back" in
                                   the registration of any debt or preferred
                                   equity securities (subject to customary
                                   scale- back provisions) that are registered
                                   by the Company (other than on a Form S-4)
                                   unless all the Exchange Notes will be
                                   redeemed or repaid from the proceeds of such
                                   securities. The Company will be required to
                                   effect an "A/B" exchange offer to all holders
                                   of Exchange Notes within 60 days of the
                                   issuance of the Exchange Notes if the holders
                                   of a majority in principal amount of the
                                   Exchange Notes then outstanding so request.

The Merger                         Same as Interim Loans.

Governing Law                      New York.

                                    B-4
<PAGE>
                                 SCHEDULE 1

          Interim Lender                     Interim Loan Amount
          --------------                     -------------------
            LCPI                               $150,000,000

                                  CONFIDENTIAL


                            PNC CAPITAL MARKETS, INC.
                           One PNC Plaza, Third Floor
                                249 Fifth Avenue
                       Pittsburgh, Pennsylvania 15222-2727


                         PNC BANK, NATIONAL ASSOCIATION
                           One PNC Plaza, Third Floor
                                249 Fifth Avenue
                       Pittsburgh, Pennsylvania 15222-2727


                  $550 Million Senior Secured Credit Facilities
                        Commitment and Engagement Letter
                        --------------------------------


                                 August 24, 1998


Francis D. John
Chairman of the Board, President and
  Chief Executive Officer
Key Energy Group, Inc.
Two Tower Center, Twentieth Floor
East Brunswick, New Jersey 08816

Stephen E. McGregor
Executive Vice President and Chief Financial Officer
Key Energy Group, Inc.
Two Tower Center, Twentieth Floor
East Brunswick, New Jersey 08816

Gentlemen:

          It is our understanding that Key Energy Group, Inc. (the "Company")
proposes to acquire (the "Acquisition") Dawson Production Services, Inc.
("Dawson"). We understand that the Acquisition would be accomplished by means of
a tender offer followed by a merger between Dawson and the Company (the
"Merger"). As consideration for the Acquisition, the shareholders of Dawson will
receive consideration in the form of cash in an amount equal to $17.50 per share
and after giving effect to the Acquisition, the Company will succeed to all the
assets and liabilities of Dawson.
<PAGE>
Page 2.

          We understand that the Company will require up to $550,000,000 of
senior secured financing to (i) consummate the Acquisition, (ii) refinance
certain existing indebtedness of the Company and Dawson, (iii) provide working
capital for the Company and its subsidiaries, and (iv) pay fees and expenses in
connection with the transaction contemplated hereby. We further understand that
financing may be required in connection with puts which may be made of Dawson's
9-3/8% Notes as a result of a change of control occurring in connection with the
Acquisition (the "Put Financing"). We understand that a portion of such
financing will be accomplished by (i) the issuance and sale by the Company of up
to $150,000,000 of long-term unsecured senior subordinated notes (the "Senior
Subordinated Notes") or (ii) the issuance and sale of senior bridge subordinated
notes (the "Subordinated Put Notes") which will subsequently be refinanced with
an issuance of Senior Subordinated Notes as described in the Summary (as defined
below). It is our understanding that with respect to the $550,000,000 of senior
secured financing, the Company has requested that PNC Bank, National Association
("PNC Bank" or the "Bank") underwrite and PNC Capital Markets, Inc. ("PNC
Capital Markets") syndicate all of such senior secured credit facilities (the
"Financing"). Notwithstanding the foregoing, as described in the Summary, the
Put Financing will be funded on the date of initial funding of the Financing as
senior secured notes pari passu with the Financing and such Put Financing will
become junior and subordinate on the date of the Merger and may be prepaid to
the extent the principal amount thereof exceeds 101% of the principal amount of
the Dawson 9-3/8% Notes put as a result of such change of control plus interest,
fees and expenses paid in connection with the Put Financing and the Dawson
9-3/8% Notes.

          We are pleased to inform you that PNC Bank commits to provide the
entire amount of the Financing described in the Summary of Terms and Conditions
attached hereto as Exhibit A (the "Summary"), subject to the terms and
conditions referred to in this letter and the Summary. The Summary includes a
description of the principal terms of the proposed credit facilities connected
with the Financing, and is intended as a framework for the documentation and as
a basis for further discussion of the Financing's terms, as appropriate. The
Financing will be documented in a definitive credit agreement (the "Credit
Agreement") and other agreements, instruments, certificates, and documents
called for by the Credit Agreement or which the Bank may otherwise require
(collectively, the "Credit Documents"), to be delivered at the closing of the
Financing (the "Closing"). The terms of the Credit Documents shall prevail over
the terms of this letter.

          PNC Bank's obligations are conditioned on the execution and delivery
of the Credit Documents to the Bank in form and content satisfactory to the
Bank. Because not all of the terms can be set forth in the Summary, a failure by
the Bank or the Company to agree on the definitive terms of the Credit Documents
will not constitute a breach of this commitment. This letter is also subject to
acceptance by the Company as provided below and the statutory and other
requirements under which the Bank is governed.

          PNC Bank and PNC Capital Markets shall be entitled, after consultation
with you, to change the pricing, structure and terms of the proposed Financing
if the syndication has not been completed and if PNC Bank and PNC Capital
Markets determine that such changes are advisable in order to insure a
<PAGE>
Page 3.

successful syndication of the proposed Financing (provided that the total amount
of the Financing remains unchanged). PNC Bank's commitment hereunder is subject
to the agreement in this paragraph.

          In addition to the terms and conditions set forth in the Summary, PNC
Bank's commitment to provide the proposed Financing and PNC Capital Markets
agreement to perform the services described herein are further subject to (i)
there being no material adverse change since March 31, 1998 in the financial
condition, business, operations, properties, or prospects of the Company and its
subsidiaries and Dawson; and (ii) the non-occurrence of any material adverse
change in the loan syndication or capital market conditions generally, which
would materially affect the syndication efforts in respect of any portion of the
Financing. The Company acknowledges that PNC Bank may, in its discretion (with
reasonable prior consent of the Company), retain experts or consultants in
connection with the transaction contemplated hereby and the Financing.

          This letter is issued in reliance on the information provided to the
Bank by the Company in connection with the Company's request for the Financing
and the information in any supporting document and material. PNC Bank may
terminate this commitment if there is any material misrepresentation or material
inaccuracy in the information or any failure to include material information
with the request.

          This commitment letter may not be assigned by the Company and no
rights of the Company hereunder may be transferred without the prior written
consent of PNC Bank. The Bank may elect to (a) assign a portion of its rights
and obligations hereunder so that the assignee may become a party to the Credit
Agreement and (b) arrange for the sale of participation interests in its
commitment hereunder and/or loans made by it as contemplated hereby. In the
event of any assignment referred to in (a) above, the assignor shall be released
of all obligations assumed by the assignee.

          PNC Bank and any assignees or participants will in no event be
responsible or liable for any consequential damages that may be incurred or
alleged by any person as a result of this commitment. No modification or waiver
of any of the terms and conditions of this commitment will be valid and binding
unless agreed to in writing by PNC Bank. When accepted, this letter (including
the Fee Letter referenced below) constitutes the entire agreement between PNC
Bank and the Company concerning the Financing and replaces all prior
understandings, statements and negotiations, including without limitation (i)
the commitment and engagement letters, dated June 2, 1998, July 8, 1998, August
3, 1998 and August 17, 1998 among the Company, PNC Bank and PNC Capital Markets
and (ii) the fee letters, dated June 2, 1998, July 8, 1998, August 3, 1998 and
August 17, 1998, among the Company, PNC Bank and PNC Capital Markets
(collectively, the "Original Letters").

          PNC Bank's commitment hereunder will expire on August 25, 1998, unless
on or before that date the Company signs and returns the enclosed copy of this
letter along with the fee letter dated as of the date hereof (the "Fee Letter")
and the fee specified in the Fee Letter to be paid on the date you accept this
<PAGE>
Page 4.

letter. Once accepted, PNC Bank's commitment under this letter will expire on
December 31, 1998 if the Financing has not closed on or before that date. Both
of these expiration dates may only be extended in writing by PNC Bank.

          The remainder of this letter sets forth our mutual understanding as to
the services to be performed by PNC Capital Markets in syndicating the
Financing, the obligations of the Company, compensation to PNC Bank and PNC
Capital Markets as well as the general terms and conditions of PNC Capital
Markets' engagement (the "Engagement").

     1.   Services to be Performed by PNC Capital Markets:

          a.   PNC Capital Markets will assist the Company in finalizing the
               terms and conditions of the Financing based upon information
               supplied by, among others, the Company, Dawson (as available to
               the Company), consultants, appraisers and prospective lenders.
               Proposed terms and conditions of the Financing as of the date
               hereof are summarized in the Summary.

          b.   After the Company executes this letter, PNC Capital Markets will
               prepare and distribute a Confidential Information Memorandum (the
               "Memorandum") for the purpose of approaching lenders to provide a
               portion of the Financing. PNC Capital Markets will not distribute
               the Memorandum to any party without the consent of the Company,
               which consent shall not be unreasonably withheld.

          c.   PNC Capital Markets shall introduce PNC Bank and other interested
               lenders to the Company and assist the Company with any and all
               negotiations with such interested lenders concerning the
               Financing. The Company hereby consents to the transfer of
               information regarding the Company and its subsidiaries and Dawson
               between PNC Capital Markets, PNC Bank and their affiliates and
               other prospective lenders.

     2.   Obligations of the Company:

          a.   The Company agrees to provide PNC Capital Markets and its legal
               counsel and consultants with such information and access to the
               officers, directors, employees, accountants and legal counsel of
               the Company as may be requested by it for the purpose of
               preparing the Memorandum together with any supplemental
               information which the lenders may reasonably require. The
               information may include, but may not be limited to, general
               industry information, information about the Company and Dawson
               (as available to the Company) and subsidiaries, historical
               financial statements and financial projections over the term of
               the Financing.
<PAGE>
Page 5.

          b.   The Company agrees that prior to delivery of the Memorandum to
               any other lender, a senior officer of the Company will review the
               Memorandum and will provide a letter stating that to the best of
               his or her knowledge, the Memorandum is complete and correct in
               all material respects and does not contain any untrue statements
               of a material fact, or omit to state any matter necessary to make
               the Memorandum not materially misleading.

          c.   Until the Closing, the Company agrees that neither the Company
               nor any of its subsidiaries shall enter into any other credit
               facilities or issue any debt (other than the Subordinated Put
               Notes and the Senior Subordinated Notes, subject to the proviso
               below), whether syndicated or publicly or privately placed, if
               such facility or issue might, in PNC Capital Markets' opinion,
               have a detrimental effect on the successful completion of the
               transaction described herein, and will advise PNC Capital Markets
               immediately if any issue or facility is contemplated; provided
               however, in connection with the syndication, placement and/or
               issuance of the Subordinated Put Notes and the Senior
               Subordinated Notes, the arranger, placement agent and or manager
               with respect thereto must coordinate its syndication and/or
               placement with PNC Capital Markets and agree to consult with PNC
               Capital Markets with respect to such issuance.

     3.   Expenses and Compensation:

          a.   PNC Bank and PNC Capital Markets shall be reimbursed from time to
               time by the Company upon request for all reasonable out-of-pocket
               expenses which they may incur while performing services
               hereunder, including in connection with the negotiation,
               preparation, due diligence, execution and delivery of this
               letter, the Original Letters, the Credit Documents and other
               documentation and any initial assignment or participation of PNC
               Bank's interests herein. These include, without limitation,
               reasonable fees and expenses of legal counsel, appraisers and
               consultants. Such reimbursement shall not be contingent upon the
               Closing or execution of the Credit Documents.

          b.   The Company agrees to pay to lenders, including PNC Bank, the
               fees set forth in the Summary and to PNC Bank and PNC Capital
               Markets the fees set forth in the Fee Letter.

     4.   General:

               a.   PNC Bank, PNC Capital Markets and the Company each confirms
                    that it has the requisite power and authority to enter into
                    this letter and to perform its undertakings hereunder and
                    that any action taken by it in connection with the Financing
<PAGE>
Page 6.

                    will be taken in compliance with applicable federal, state
                    and foreign securities laws as such laws apply to it or its
                    action.

               b.   PNC Capital Markets will use reasonable efforts to provide
                    the advice, assistance and services described above. PNC
                    Capital Markets does not, however, warrant, represent,
                    promise, guarantee or otherwise provide assurances that the
                    Financing will be closed.

               c.   By executing this letter, the Company agrees to indemnify
                    and hold harmless PNC Bank, PNC Capital Markets or any
                    affiliate thereof and any assignees or participants of PNC
                    Bank and their respective officers, directors, employees,
                    affiliates and agents from and against any and all losses,
                    claims, damages, liabilities, costs and expenses (including
                    without limitation reasonable fees and expenses of counsel)
                    which may be incurred by any of them in connection with any
                    investigation, litigation or other proceeding (regardless of
                    whether any indemnified person is a party thereto) arising
                    in connection with this letter, the Acquisition, the
                    Original Letters, the Engagement or the Financing, other
                    than for their own gross negligence or wilful misconduct.
                    The Company's obligations hereunder shall be in addition to
                    any other liability it may otherwise have.

               d.   PNC Capital Markets' services hereunder may be terminated by
                    PNC Capital Markets or the Company upon thirty business
                    days' written notice to the other party, without liability
                    or continuing obligations to the other party except as
                    provided below. Notwithstanding any termination of such
                    services or this letter, PNC Capital Markets and PNC Bank
                    shall be entitled to the expenses and fees described in
                    paragraphs 3(a) and 3(b) above, and the Company's
                    indemnification obligation under paragraph 4(c) hereof will
                    continue. In the event PNC Capital Markets' services are
                    terminated, the provisions herein and in the Fee Letter
                    relating to PNC Bank and its commitment provided hereunder
                    shall remain in effect.

               e.   Upon closing, PNC Capital Markets shall be entitled to place
                    a "tombstone" advertisement in various publications subject
                    to the Company's approval of the contents of such
                    advertisement, which approval shall not be unreasonably
                    withheld or delayed.

          The terms contained in this letter and the Summary are confidential
and, except for disclosure to the Company's and Dawson's board of directors, the
Company's officers and employees, professional advisors retained by the Company
and Dawson in connection with this transaction or as may be required by law, may
not be disclosed in whole or in part to any other person or entity without our
<PAGE>
Page 7.

prior written consent. This letter is solely for the benefit of the Company and
no other person or entity shall obtain any rights hereunder or be entitled to
rely or claim reliance upon the terms and conditions hereof.

          This letter may be executed in any number of counterparts, each of
which shall be an original, and all of which, when taken together, shall
constitute one agreement. Delivery of an executed signature page of this letter
by facsimile transmission shall be effective as delivery of a manually executed
counterpart hereof.

          This letter shall be governed by and construed in accordance with the
laws of the State of New York.

<PAGE>
Page 8.

          If the foregoing accurately sets forth your understanding, please
indicate your acceptance hereof by signing the enclosed copy of this letter and
returning it to us by the date referenced above. We are pleased to have this
opportunity and very much look forward to working with you.

                                        Sincerely,

                                        PNC BANK, NATIONAL ASSOCIATION



                                        By:/s/ Thomas K. Grundman
                                           ------------------------------------
                                           Name:  Thomas K. Grundman
                                           Title:  Senior Vice President


                                        PNC CAPITAL MARKETS, INC.



                                        By:  /s/ Douglas E. Shaffer
                                             ----------------------------------
                                             Name:   Douglas E. Shaffer
                                             Title:  Senior Vice President and
                                                       Managing Director

Agreed to and accepted:

KEY ENERGY GROUP, INC.



By:/s/ Stephen E. McGregor
   --------------------------
   Title:  EVP & CFO



Date:  August 25, 1998
     ------------------------
<PAGE>
                                                                      EXHIBIT A
                                                                      ---------


                             KEY ENERGY GROUP, INC.

                      $550,000,000 SENIOR CREDIT FACILITIES

                         SUMMARY OF TERMS AND CONDITIONS

                                 August 24, 1998

Key Energy Group, Inc. ("Key" or the "Company") proposes to acquire (the
"Acquisition") all of the common stock of Dawson. The Acquisition will be
accomplished by means of a tender offer (the "Tender Offer") followed by a
merger (the "Back-End Merger") between Dawson and the Company. As used herein,
"Acquisition Date" means the date on which Key acquires the Dawson common stock
tendered pursuant to such tender offer, and "Merger Date" means the date of
consummation of the Back-End Merger. In order to finance the Acquisition, to
refinance certain existing indebtedness of the Company and Dawson, to prepay an
amount of the Put Facility (as described below) and to finance the continuing
operations of Key, Key will require up to $550 million in senior secured credit
facilities (the "Senior Credit Facilities"). Set forth below is a statement of
the terms and conditions for the Senior Credit Facilities:

I.    PARTIES
      -------

      Borrower                          The Company.

      Guarantors                        Each of the Company's direct and
                                        indirect existing domestic subsidiaries
                                        as provided in the Existing Credit
                                        Agreement (as defined below), and on and
                                        after the Merger Date, the domestic
                                        subsidiaries of Dawson (together with
                                        the Company, the "Loan Parties").

     Advisor and Arranger               PNC Capital Markets, Inc. (in such
                                        capacity, the "Arranger").

     Administrative Agent               PNC Bank, National Association ("PNC" or
                                        the "Agent").

     Banks                              Certain existing lenders party to the
                                        Credit Agreement, dated as June 6, 1997,
                                        as amended and restated through November
                                        6, 1997, among Key, the several banks
                                        and other financial institutions or
                                        other entities from time to time party
                                        thereto, PNC and the Arranger (the
                                        "Existing Credit Agreement") and new
                                        lending institutions acceptable to the
                                        Company (the "Banks").
<PAGE>
                                                                              2
II.   SENIOR SECURED
      CREDIT FACILITIES                 Up to $550,000,000 in aggregate,
                                        comprised of a Revolving Credit Facility
                                        and Term Loan Facilities.

     A.   REVOLVING CREDIT FACILITY

     Amount                             Initially, up to $550,000,000 and on the
                                        Merger Date, the aggregate amount of the
                                        Revolving Credit Facility will
                                        automatically be reduced by an amount
                                        (the "Term Loan Aggregate Amount") equal
                                        to up to $300,000,000. Any of such loans
                                        herein referred to as "Revolving Credit
                                        Loans."

     Letters of Credit                  A sublimit of $20,000,000 of the
                                        Revolving Credit Facility shall be
                                        available for the issuance of letters of
                                        credit (the "Letters of Credit") by a
                                        Bank acceptable to the Company and the
                                        Agent (the "Issuing Bank"). No Letter of
                                        Credit shall have an expiration date
                                        after the earlier of (a) one year after
                                        the date of issuance and (b) five
                                        business days prior to the Maturity Date
                                        (defined below), provided that any
                                        Letter of Credit with a one-year tenor
                                        may provide for the renewal thereof for
                                        additional one-year periods (which shall
                                        in no event extend beyond the date
                                        referred to in clause (b) above).

                                        Drawings under any Letter of Credit
                                        shall be reimbursed by the Company
                                        (whether with its own funds or with the
                                        proceeds of Revolving Credit Loans) on
                                        the same business day. To the extent
                                        that the Company does not so reimburse
                                        the Issuing Bank, the Banks under the
                                        Revolving Credit Facility shall be
                                        irrevocably and unconditionally
                                        obligated to reimburse the Issuing Bank
                                        on a pro rata basis.

     Maturity                           The earliest to occur of (i) 365 days
                                        after the initial funding hereunder or
                                        (ii) termination or abandonment by the
                                        Company of the Acquisition (the
                                        "Maturity Date"); provided, however,
                                        that in the event that the Merger Date
                                        occurs on or before the Maturity Date
                                        and the Term Loans are made to the full
                                        extent of the Term Loan Aggregate Amount
                                        (as defined above), the Maturity Date
                                        will automatically be extended to five
                                        years from the initial closing date of
                                        the Senior Credit Facilities.
<PAGE>
                                                                              3

     Availability; Repayment            The Revolving Credit Facility shall be
                                        available on a revolving basis from the
                                        period commencing on the Acquisition
                                        Date and ending on the Maturity Date;
                                        provided, that the amount of the
                                        Revolving Credit Facility will be
                                        reduced on each anniversary of the
                                        Acquisition Date, commencing with the
                                        third such anniversary, by the amount
                                        set forth opposite such anniversary
                                        below:

                                        Anniversary           Amount
                                        -----------           ------

                                             3              $25,000,000
                                             4              $25,000,000
                                             5              $        0

     Use of Proceeds                    (a)  Up to $490,000,000 in the aggregate
                                        of the Revolving Credit Facility may be
                                        used on and after the Acquisition Date
                                        (i) to fund the Acquisition and to pay
                                        transaction costs associated therewith,
                                        (ii) to refinance indebtedness of Key,
                                        Dawson and their respective subsidiaries
                                        (including, without limitation the
                                        Existing Credit Agreement and the Put
                                        Facility, as described below), (iii) to
                                        pay fees and expenses associated with
                                        the Senior Credit Facilities, and (iv)
                                        to pay holders of Dawson 9-3/8% Notes
                                        who have put their Notes as a result of
                                        the change of control in connection with
                                        the Acquisition (as described below).

                                        (b) The balance of the Revolving Credit
                                        Facility may be used for working
                                        capital, capital expenditures, Permitted
                                        Acquisitions (as defined in the Existing
                                        Credit Agreement) and general corporate
                                        purposes of the Company and its
                                        subsidiaries from time to time on and
                                        after the Acquisition Date.

     B.   TERM LOAN FACILITIES

     Types and Amount
        of Facilities                   Term Loan Facilities in the aggregate
                                        amount of up to $300,000,000 (the loans
                                        thereunder, the "Term Loans"), available
                                        in single draw on the Merger Date, as
                                        follows:

                                        Tranche A Term Loan Facility:
                                        ----------------------------

                                        A five year term loan facility (the
                                        "Tranche A Term Loan Facility") in an
                                        aggregate amount of up to $150,000,000.
<PAGE>
                                                                              4

                                        The Tranche A Term Loan Facility shall
                                        be repayable in quarterly amounts as a
                                        percentage of the total Tranche A Term
                                        Loan as follows:

                                                  Percent        Percent
                                                  Payable        Payable
                                        Date      Quarterly      Annually
                                        ----      ---------      --------

                                        Year 1         0%           0%
                                        Year 2         4%           16%
                                        Year 3         6%           24%
                                        Year 4         7%           28%
                                        Year 5         8%           32%


                                        Tranche B Term Loan Facility
                                        ----------------------------

                                        A six year term loan facility (the
                                        "Tranche B Term Loan Facility") in an
                                        aggregate amount of up to $150,000,000.
                                        The Tranche B Term Loan shall be
                                        repayable in quarterly installments as a
                                        percentage of the total Tranche B Term
                                        Loan as follows:

                                                  Percent        Percent
                                                  Payable        Payable
                                        Date      Quarterly      Annually
                                        ----      ---------      --------

                                        Year 1-5     0.25%          1%
                                        Year 6       23.75%         95%

                                        Additionally, at no time shall the
                                        maturity of the Tranche B Term Loan
                                        Facility be less than 90 days prior to
                                        the maturity of the Company's
                                        $216,000,000 Convertible Subordinated
                                        Notes due 2004.

                                        The aggregate amount of Term Loans
                                        constituting Tranche A Term Loans and
                                        the Tranche B Term Loans, respectively,
                                        shall be determined by the Agent in its
                                        sole discretion after consultation with
                                        the Borrower.

     Use of Proceeds                    The Term Loans shall be used to repay
                                        advances under the Revolving Credit
                                        Facility and to pay for the balance of
                                        shares acquired in the Acquisition.
<PAGE>
                                                                              5
III. CERTAIN PAYMENT PROVISIONS
     --------------------------

     Interest Rates and
       Letter of Credit Fees            Interest rates shall be based on the
                                        Company's Consolidated Leverage Ratio,
                                        as defined in the Existing Credit
                                        Agreement, per the attached Pricing Grid
                                        A. Upon the issuance of new equity in a
                                        minimum amount of $75,0000,000, Pricing
                                        Grid B becomes effective; provided that
                                        if such new equity is issued in
                                        connection with acquisitions, Pricing
                                        Grid B will not become effective until
                                        the ratio of Consolidated Total
                                        Indebtedness to the sum of Consolidated
                                        Total Indebtedness plus Consolidated Net
                                        Worth (as such terms are defined in the
                                        Existing Credit Agreement) is equal to
                                        or less than 75% (the "Minimum Equity
                                        Event").

                                        From the Acquisition Date until the
                                        calculation for the first full fiscal
                                        quarter completed after the Acquisition
                                        Date, Level VI of Pricing Grid A will be
                                        in effect.

     Base Rate Option                   The Base Rate is the higher of (1) PNC
                                        Bank's Prime rate or (2) the Federal
                                        Funds rate plus 1/2%. Interest on Base
                                        Rate borrowings is calculated on an
                                        actual/365 or 366 day basis and is
                                        payable quarterly.

     LIBOR Option                       Interest on LIBOR borrowings is
                                        calculated on an actual/360 day basis
                                        and is payable the earlier of quarterly
                                        or on the last day of each interest
                                        period. LIBOR advances will be available
                                        for periods of 1,2,3 or 6 months. LIBOR
                                        pricing will be adjusted for any
                                        statutory reserves.

                                        The Company may have no more than 12
                                        borrowing tranches, including the Base
                                        Rate tranche, at any one time.

     Default Rate                       Overdue principal or interest shall bear
                                        interest at 2% over the otherwise
                                        applicable rate; overdue commitment fees
                                        shall bear interest at 2% over the rate
                                        applicable to the Base Rate pricing
                                        option.

     Letters of Credit                  The Company shall pay letter of credit
                                        fees equal to the then applicable spread
                                        above LIBOR on the aggregate face amount
                                        of Letters of Credit issued under the
                                        Revolving Credit Facility to each Bank
                                        quarterly in proportion to such
<PAGE>
                                                                              6

                                        Bank's commitment. In addition, the
                                        Company shall pay the Issuing Bank, a
                                        fee of 12.5 basis points, payable
                                        quarterly, on the aggregate face amount
                                        of such Letters of Credit.

     Yield Protection                   The Company shall pay the Banks such
                                        additional amounts as will compensate
                                        the Banks in the event applicable law,
                                        or change in law, subjects the Banks to
                                        reserve requirements, capital
                                        requirements, taxes (except for taxes on
                                        the overall net income of the Banks) or
                                        other charges which increase the cost or
                                        reduce the yield to the Banks, under
                                        customary yield protection provisions.

     Interest Rate Protection           A minimum of 50% of Consolidated Total
                                        Debt (as defined in the Existing Credit
                                        Agreement) will be hedged on terms
                                        satisfactory to the Agent within 90 days
                                        of the closing of the Senior Credit
                                        Facilities.

     Commitment Fee                     A per annum fee on the unused amount of
                                        the Revolving Credit Facility payable to
                                        each Bank quarterly in arrears in
                                        proportion to such Bank's commitment,
                                        per the attached Pricing Grid.

     Collateral                         First priority perfected lien on
                                        substantially all of the tangible and
                                        intangible assets (as provided in the
                                        Existing Credit Agreement) of the
                                        Company and its existing direct and
                                        indirect domestic operating subsidiaries
                                        including, without limitation,
                                        intellectual property and real property
                                        as well as all of the capital stock of
                                        each of the Company's existing direct
                                        and indirect subsidiaries which are
                                        Guarantors. On the Merger Date the
                                        Collateral shall also include a first
                                        priority perfected lien on all tangible
                                        and intangible assets of Dawson and its
                                        subsidiaries and all of the capital
                                        stock of Dawson and its subsidiaries.
                                        Subject to compliance with Regulation U
                                        of the Board of Governors of the Federal
                                        Reserve System, the Agent may require
                                        the Company to pledge all capital stock
                                        of Dawson owned (or being acquired) by
                                        the Company and its Subsidiaries.

                                        After the Merger, the Collateral will
                                        also secure on a pari passu basis all
                                        the Company's obligations (as successor
                                        by merger to Dawson) under Dawson's
                                        9-3/8% Notes.
<PAGE>
                                                                              7

     Expenses                           Reasonable out-of-pocket expenses
                                        incurred by the Agent shall be for the
                                        account of the Company. These include
                                        fees and expenses for the Agent's legal
                                        counsel.

     Optional Prepayments;
       Voluntary Reductions             Outstandings or commitments under the
                                        Senior Credit Facilities may be prepaid
                                        or terminated, in whole or in part, at
                                        the Company's option, subject to
                                        reimbursement of any costs associated
                                        with prepayments of LIBOR advances or
                                        any other provisions contained in the
                                        credit agreement. Voluntary reductions
                                        of the commitment under the Revolving
                                        Credit Facility will be in minimum
                                        amounts of $5,000,000. Optional
                                        prepayments of the Term Loans shall be
                                        applied to the Tranche A Term Loans and
                                        the Tranche B Term Loans ratably and
                                        shall be applied ratably to the
                                        remaining unpaid scheduled amortization
                                        payments thereof. Notwithstanding the
                                        foregoing, so long as any Tranche A Term
                                        Loans are outstanding, each holder of
                                        Tranche B Term Loans shall have the
                                        right to refuse all or any portion of
                                        such prepayment allocable to its Tranche
                                        B Term Loans, and the amount so refused
                                        will be applied to prepay the Tranche A
                                        Term Loans.

      Mandatory
      Prepayments                       100% of the Net Cash Proceeds from up to
                                        $75,000,000 of equity offerings (whether
                                        such equity is sold in a private
                                        placement or a public offering) and 75%
                                        of the Net Cash Proceeds from equity
                                        offerings (whether such equity is sold
                                        in a private placement or a public
                                        offering) in excess of $75,000,000 shall
                                        be applied to reduce outstandings under
                                        the Senior Credit Facilities.

                                        Beginning with the fiscal year ending
                                        June 30, 1999, mandatory prepayments
                                        equal to 50% of Excess Cash Flow (to be
                                        defined) shall be required; provided
                                        that upon occurrence of the Minimum
                                        Equity Event mandatory prepayments from
                                        Excess Cash Flow will not be required
                                        until the fiscal year ending June 30,
                                        2001. Notwithstanding the foregoing, if
                                        the Consolidated Leverage Ratio is less
                                        than 3.5 to 1 mandatory prepayment from
                                        Excess Cash Flow will not be required.
<PAGE>
                                                                              8

                                        Mandatory prepayments in connection with
                                        the sale of Odessa shall be payable as
                                        provided in the Existing Credit
                                        Agreement.

                                        All mandatory prepayments shall be
                                        applied first to the outstanding Term
                                        Loans, then to the reduction of the
                                        Revolving Credit Facility commitments to
                                        no less than $200,000,000. Each such
                                        prepayment of Term Loans shall be
                                        applied to the Tranche A Term Loans and
                                        the Tranche B Term Loans ratably and
                                        shall be applied ratably to the
                                        remaining unpaid scheduled amortization
                                        payments thereof. Notwithstanding the
                                        foregoing, so long as any Tranche A Term
                                        Loans are outstanding, each holder of
                                        Tranche B Term Loans shall have the
                                        right to refuse all or any portion of
                                        such prepayment allocable to its Tranche
                                        B Term Loans, and the amount so refused
                                        will be applied to prepay the Tranche A
                                        Term Loans.

                                        To the extent the Put Facility after the
                                        Merger Date provides for mandatory
                                        prepayments based on issuance of equity,
                                        incurrence of indebtedness, asset sales,
                                        change of control or otherwise, the
                                        Senior Credit Facilities shall require
                                        such proceeds (other than proceeds of
                                        the Senior Subordinated Notes (as
                                        defined below) or equity used to prepay
                                        the Subordinated Put Facility) to be
                                        first used to prepay the Senior Credit
                                        Facilities. Prior to the Merger
                                        prepayments shall be shared with the Put
                                        Facility on a pro rata basis.

IV.  REPRESENTATIONS AND WARRANTIES

                                        Representations and Warranties as
                                        provided in the Existing Credit
                                        Agreement unless specifically modified
                                        herein:

                                        1.   Financial Condition.

                                        2.   No Material Adverse Effect.

                                        3.   Corporate Existence; Compliance
                                             with Law (including, without
                                             limitation, applicable Federal
                                             Reserve regulations and margin
                                             rules).

                                        4.   Corporate Power; Authorizations;
                                             Enforceable Obligations
<PAGE>
                                                                              9

                                        5.   No Legal Bar.

                                        6.   No Material Litigations.

                                        7.   No Default.

                                        8.   Ownership of Property; Liens.

                                        9.   Intellectual Property.

                                        10.  No Burdensome Restrictions.

                                        11.  Taxes.

                                        12.  Federal Regulations.

                                        13.  ERISA.

                                        14.  Investment Company Act; Other
                                             Regulations.

                                        15.  Subsidiaries.

                                        16.  Purpose of Loans; Limitations on
                                             Use.

                                        17.  Environmental Matters.

                                        18.  Accuracy of Information.

                                        19.  Security Documents.

                                        20.  Solvency.

                                        21.  Labor Matters.

                                        22.  Indenture.

                                        23.  Excluded Subsidiaries.

                                        24.  Oil and Gas Properties.

                                        25.  Year 2000 compliance.

                                        26.  Merger with Dawson.
<PAGE>
                                                                             10

                                        Other customary Representations and
                                        Warranties as appropriate and in the
                                        Existing Credit Agreement.

V.   CONDITIONS PRECEDENT TO LENDING
     -------------------------------

     A.  CONDITIONS PRECEDENT TO
         CLOSING AND LENDING ON
         ACQUISITION DATE               The availability of the Senior Credit
                                        Facilities and the making of Revolving
                                        Credit Loans on the Acquisition Date
                                        shall be conditioned upon satisfaction,
                                        in form and substance satisfactory to
                                        the Agent and the Banks, of the
                                        following conditions:

                                        1.   The per share acquisition price
                                             for the common stock of Dawson
                                             shall not be more than $17.50 per
                                             share and the total purchase price
                                             for all outstanding capital stock
                                             of Dawson shall not exceed
                                             approximately $202,000,000.

                                        2.   (a) The Company shall have received
                                             up to $150,000,000 (but not less
                                             than the aggregate principal amount
                                             of Dawson's 9-3/8% Notes) of net
                                             cash proceeds (the "Required
                                             Amount") from the issuance of
                                             senior unsecured subordinated notes
                                             with an initial redemption of not
                                             less than one year following the
                                             final maturity of the Tranche B
                                             Term Loans and with an average
                                             maturity of not less than nine
                                             years and on terms and conditions
                                             customary for the high-yield market
                                             and satisfactory to the Agent (the
                                             "Senior Subordinated Notes") or (b)
                                             the Company shall have Received the
                                             Required Amount from loans under an
                                             unsecured subordinated bridge
                                             credit facility (the "Subordinated
                                             Put Facility", together with the
                                             Senior Subordinated Notes, the "Put
                                             Facility"), and the terms and
                                             provisions of the Subordinated Put
                                             Facility shall be acceptable to the
                                             Agent (including, without
                                             limitation, the conditions for
                                             funding under the Subordinated Put
                                             Facility and terms of conversion of
                                             the notes under the Subordinated
                                             Put Facility into long term
                                             subordinated exchange notes (such
                                             exchange notes having terms and
                                             conditions satisfactory to the
                                             Agent) if the Subordinated Put
                                             Facility is not paid by an agreed
                                             upon date). In addition, in
                                             connection with the Subordinated
<PAGE>
                                                                             11

                                             Put Facility the Company shall
                                             have received an engagement letter
                                             providing or the refinancing of the
                                             Subordinated Put Facility (and if
                                             appropriate, other indebtedness of
                                             the Company) from the proceeds of
                                             the issuance of Senior Subordinated
                                             Notes. The proceeds of the Senior
                                             Subordinated Notes and/or the
                                             Subordinated Put Facility shall be
                                             used in connection with the
                                             Acquisition. Until the Merger Date,
                                             the Put Facility will be secured on
                                             a pari passu basis with the same
                                             collateral for the Senior Credit
                                             Facilities (subject to an inter
                                             creditor agreement acceptable to
                                             the Administrative Agent), and will
                                             be senior indebtedness, thereafter
                                             it will automatically be unsecured
                                             subordinated indebtedness. On the
                                             date payment is to be made to
                                             holders of Dawson 9-3/8% Notes who
                                             have put their Notes as a result of
                                             the change of control, the Company
                                             may use the Senior Credit
                                             Facilities to make such payment to
                                             holders of Dawson 9-3//8% Notes and
                                             on the same day to prepay the Put
                                             Financing to the extent the
                                             principal amount thereof exceeds
                                             101% of the principal amount of
                                             such Notes put plus interest, fees
                                             and expenses paid in connection
                                             with the Put Facility and the
                                             9-3/8% Dawson Notes.

                                        3.   (i) Dawson and Key shall not have
                                             modified the documentation
                                             providing for the Merger (the
                                             "Merger Documentation") unless such
                                             modification is satisfactory to the
                                             Agent; no provision thereof shall
                                             have been waived, amended,
                                             supplemented or otherwise modified
                                             in a manner which could, in the
                                             opinion of the Agent, reasonably be
                                             expected to be materially adverse
                                             to the rights or interest of the
                                             Agent or the Banks; and (ii) the
                                             Board of Directors of Dawson shall
                                             have approved the Merger and such
                                             approval shall not have been
                                             withdrawn.

                                        4.   All required actions shall have
                                             been taken so that (a) the
                                             applicable state anti-takeover
                                             law(s) shall be inapplicable to
                                             the Acquisition and (b) any
                                             preferred stock purchase rights
                                             or other "poison pill"
                                             arrangements shall not have
                                             become, and shall not become,
                                             exercisable.
<PAGE>
                                                                             12

                                        5.   Key shall have acquired at least
                                             51% of the shares of the common
                                             stock of Dawson (or such higher
                                             percentage of the common and other
                                             capital stock of Dawson as shall be
                                             required under the organizational
                                             documents of Dawson and applicable
                                             law in order to, without the
                                             affirmative vote of any other
                                             holder of capital stock of Dawson,
                                             (a) permit the Merger to be
                                             consummated on or prior to the date
                                             which is 150 days after the
                                             Acquisition Date and (b)
                                             immediately appoint a majority of
                                             the Board of Directors of Dawson or
                                             such higher number of directors as
                                             is required to approve the Merger).

                                        6.   The Agent shall be satisfied (a)
                                             that the Acquisition and the
                                             financing thereof do not violate
                                             Regulations T, U or X of the Board
                                             of Governors of the Federal Reserve
                                             System and (b) with all other
                                             matters relating to Regulation U.

                                        7.   All documents and materials
                                             filed publicly by the Company or
                                             Dawson in connection with the
                                             Acquisition shall have been
                                             furnished to the Agent and shall be
                                             reasonably satisfactory to the
                                             Agent.

                                        8.   All necessary or required
                                             government and third party
                                             approvals (including
                                             Hart-Scott-Rodino clearance) in
                                             connection with the Acquisition and
                                             the financing contemplated hereby
                                             shall have been obtained and shall
                                             be in full force and effect, and
                                             all applicable waiting periods
                                             shall have expired without any
                                             action being taken or threatened by
                                             any competent authority that would
                                             restrain, prevent or otherwise
                                             impose adverse conditions on the
                                             Acquisition or the financing
                                             thereof. There shall be in effect
                                             no injunction or other prohibition
                                             on the Acquisition or the financing
                                             contemplated hereby, and no
                                             litigation or proceeding pending or
                                             threatened which seeks to enjoin
                                             the Acquisition or other
                                             transaction contemplated hereby or
                                             which could reasonably be expected
                                             to have a material adverse affect
                                             on the Borrower and its
                                             subsidiaries as a whole.

                                        9.   All amounts outstanding in
                                             respect of the Existing Credit
                                             Agreement shall have been, or
<PAGE>
                                                                             13

                                             contemporaneously shall be,
                                             refinanced under the Senior Credit
                                             Facilities.

                                        10.  The Agent and Banks shall have
                                             received closing certificates,
                                             certified resolutions, incumbency
                                             certificates and corporate
                                             documents for each Loan Party.

                                        11.  Execution and delivery of all
                                             definitive financing documents with
                                             respect to the Senior Credit
                                             Facilities (the "Credit
                                             Documentation") and all action
                                             taken so that the Collateral Agent
                                             has a perfected first priority lien
                                             on the Collateral as contemplated
                                             under the heading "Collateral"
                                             above.

                                        12.  The Agent and Banks shall have
                                             received such opinion(s) of counsel
                                             (including (i) from counsel to the
                                             Company and its subsidiaries and
                                             (ii) from such special and local
                                             counsel as may be required by the
                                             Agent) as are customary for
                                             transactions of this type or as
                                             they may reasonably request.

                                        13.  There shall have been no material
                                             adverse change in the business,
                                             assets, financial condition,
                                             operations or prospects of the
                                             Company and its subsidiaries taken
                                             as a whole or Dawson and its
                                             subsidiaries taken as a whole.

                                        14.  The Agent and Banks shall have
                                             received evidence of required
                                             insurance.

                                        15.  Payment of all fees and expenses
                                             subject to reimbursement.

                                        16.  The pro forma consolidated EBITDA
                                             for Dawson and the Company for the
                                             fiscal year ending June 30, 1998 is
                                             not less than $170,000,000 in the
                                             aggregate.

                                        17.  The Agent and Banks shall have
                                             received a satisfactory
                                             consolidated balance sheet of the
                                             Company as of June 30, 1998.
<PAGE>
                                                                             14

                                        18.  The Agent and Banks shall have
                                             received a five-year pro forma
                                             consolidated balance sheet,
                                             consolidated statements of income,
                                             retained earnings and cash flow
                                             with assumptions used in preparing
                                             the statements for Key and for the
                                             combined Key-Dawson entity.

                                        19.  The Agent and Banks shall have
                                             received a satisfactory business
                                             plan for the six fiscal years
                                             following the closing of the Senior
                                             Credit Facilities and a
                                             satisfactory written analysis of
                                             the business and prospects of the
                                             Company and its subsidiaries for
                                             the period from the closing of the
                                             Senior Credit Facilities through
                                             the final maturity of the Term
                                             Loans.

                                        20.  The Agent and Banks shall have
                                             received the results of a recent
                                             lien search in each relevant
                                             jurisdiction with respect to the
                                             Company and its subsidiaries, and
                                             such search shall reveal no liens
                                             on any of the assets of the
                                             Borrower or its subsidiaries except
                                             for liens permitted by the Credit
                                             Documentation or liens to be
                                             discharged on or prior to the
                                             closing of the Senior Credit
                                             Facilities pursuant to
                                             documentation satisfactory to the
                                             Agent.

                                        21.  The Agent and Banks shall have
                                             received a satisfactory solvency
                                             certificate from the chief
                                             financial officer of the Company
                                             that shall document the solvency of
                                             the Company and its subsidiaries
                                             after giving effect to the
                                             Acquisition and the other
                                             transactions contemplated hereby.

                                        22.  The Agent and Banks shall have
                                             received a satisfactory
                                             environmental audit with respect to
                                             the real property owned or leased
                                             by the Company and its subsidiaries
                                             from a firm satisfactory to the
                                             Agent.

                                        23.  All conditions to the Company's
                                             acquiring shares of Dawson in the
                                             Tender Offer, as reflected in the
                                             documentation initially filed with
                                             the Securities and Exchange
                                             Commission, shall have been
                                             satisfied without material
                                             amendment, waiver or change
                                             thereof.

                                        Other Conditions Precedent to Lending as
                                        appropriate and in the Existing Credit
                                        Agreement.
<PAGE>
                                                                             15

     B.   ON-GOING CONDITIONS PRECEDENT

                                             The making of each extension of
                                             credit under the Senior Credit
                                             Facilities, including those on the
                                             Acquisition Date, shall be
                                             conditioned upon:

                                        1.   The continued accuracy of all
                                             Representations and Warranties in
                                             the Credit Documentation
                                             (including, without limitation, the
                                             material adverse change and
                                             material litigation
                                             representations).

                                        2.   There being no Default or Event of
                                             Default in existence at the time
                                             of, or after giving effect to the
                                             making of, such extension of
                                             credit.

                                        As used herein and in the Credit
                                        Documentation a "material adverse
                                        change" shall mean any event,
                                        development or circumstance that has had
                                        or could reasonably be expected to have
                                        a material adverse effect on (a) the
                                        Acquisition (b) the business, property,
                                        operations, condition (financial or
                                        otherwise) or prospects of the Company
                                        and its subsidiaries and Dawson taken as
                                        a whole or (c) the validity or
                                        enforceability of any of the Credit
                                        Documentation or the rights and remedies
                                        of the Agent and Banks thereunder.

C.    CONDITIONS PRECEDENT TO
        THE MERGER AND
        TERM LOANS                      The making of the Term Loans on the
                                        Merger Date shall be conditioned upon
                                        (i) receipt by the Agent of satisfactory
                                        evidence that the Merger has been
                                        completed in accordance with the Merger
                                        Documentation (if any) and no provision
                                        thereof shall have been waived, amended
                                        as supplemental or otherwise modified in
                                        a manner which could, in the opinion of
                                        the Agent, reasonably be expected to be
                                        adverse to the interest of the Agent or
                                        the Banks, (ii) the Agent having
                                        received lien searches with respect to
                                        Dawson and its subsidiaries and all
                                        actions being taken so that Dawson's
                                        subsidiaries shall have guaranteed the
                                        Senior Credit Facilities and the
                                        Collateral Agent has a perfected first
                                        priority lien on all the stock and
                                        tangible and intangible assets of Dawson
                                        and its subsidiaries, (iii) the Merger
                                        and the financing contemplated hereby
                                        (including granting of liens on assets
                                        of Dawson and guarantees by Dawson'
                                        subsidiaries) shall not cause a
                                        violation of Dawson's
<PAGE>
                                                                             16

                                        9-3/8% Notes and (iv) the Agent and the
                                        Banks having received a satisfactory
                                        environmental audit with respect to the
                                        real property owned or leased by Dawson
                                        and its Subsidiaries from a firm
                                        satisfactory to the Agent.

VI.  COVENANTS AND EVENTS OF DEFAULT
     -------------------------------

     A.   AFFIRMATIVE COVENANTS

                                        1.   Provide within 50 days after each
                                             of the first three fiscal quarter
                                             ends, consolidated balance sheets,
                                             consolidated statements of
                                             operations and cash flows together
                                             with a Certificate of Compliance
                                             from the Chief Executive Officer,
                                             President or Chief Financial
                                             Officer of the Company.

                                        2.   Provide within 95 days after each
                                             fiscal year-end, consolidated
                                             balance sheets and consolidated
                                             statements of operations,
                                             stockholders' equity and cash flows
                                             together with (i) a report of an
                                             independent certified public
                                             accountant satisfactory to the
                                             Agent (ii) any management letters
                                             of such accountants addressed to
                                             the Company and (iii) a Certificate
                                             of Compliance from the Chief
                                             Executive Officer, President or
                                             Chief Financial Officer of the
                                             Company.

                                        3.   Provide budgets and forecasts.

                                        Other Affirmative Covenants as
                                        appropriate and in the Existing Credit
                                        Agreement including, without limitation,
                                        continuation of business and maintenance
                                        of existence and material rights and
                                        privileges; compliance with laws and
                                        material contractual obligations;
                                        maintenance of property and insurance;
                                        maintenance of books and records; right
                                        of the Banks to inspect property and
                                        books and records; notices of defaults,
                                        litigation and other material events;
                                        compliance with environmental laws;
                                        further assurances (including, without
                                        limitation, with respect to security
                                        interests in after-acquired property);
                                        use of best efforts to pay the
                                        Subordinated Put Facility with the
                                        proceeds of Senior Subordinated Notes no
                                        later than six months after the initial
                                        funding under the Subordinated Put
                                        Facility.

     B.   FINANCIAL COVENANTS           1.   Minimum Net Worth - The Company's
                                             Net Worth shall not be less than a
                                             ratio to be determined of the Net
<PAGE>
                                                                             17

                                             Worth at Closing plus 75% of
                                             positive quarterly net income
                                             thereafter and 100% of the Net Cash
                                             Proceeds of any subsequent equity
                                             offerings and 75% of the net
                                             proceeds of the conversion of the
                                             Company's existing and future
                                             convertible indebtedness.

                                        2.   Consolidated Leverage Ratio - As of
                                             the end of each fiscal quarter, the
                                             Company's Consolidated Leverage
                                             Ratio, defined as Consolidated
                                             Total Indebtedness less cash and
                                             equivalents in excess of $5,000,000
                                             to Consolidated EBITDA (on a pro
                                             forma basis), for the previous four
                                             quarters shall not exceed a ratio
                                             to be determined. Step downs in
                                             this ratio to be determined.

                                             Upon occurrence of the Minimum
                                             Equity Event, the Consolidated
                                             Leverage Ratio Covenant will reduce
                                             to a ratio to be determined for the
                                             immediately following quarter and
                                             all subsequent quarter.

                                        3.   Consolidated Senior Leverage Ratio
                                             - As of the end of each fiscal
                                             quarter, the Company's Consolidated
                                             Senior Leverage Ratio, defined as
                                             Consolidated Senior Indebtedness
                                             less cash and cash equivalents in
                                             excess of $5,000,000 to
                                             Consolidated EBITDA (on a pro forma
                                             basis), for the previous four
                                             quarters shall not exceed a ratio
                                             to be determined. Step downs in the
                                             ratio to be determined.

                                             Upon occurrence of the Minimum
                                             Equity Event, the Consolidated
                                             Senior Leverage Ratio Covenant will
                                             reduce to a ratio to be determined
                                             for the immediately following
                                             quarter and all subsequent quarter.

                                        4.   Consolidated Interest Coverage
                                             Ratio - As of the end of each
                                             fiscal quarter, for the previous
                                             four quarters, the ratio of the
                                             Company's Consolidated EBITDA,
                                             defined for the purposes of the
                                             Consolidated Interest Coverage
                                             Ratio as actual reported EBITDA for
                                             the immediately preceding four
                                             fiscal quarters, to Consolidated
                                             Interest Expense shall not be less
                                             than a ratio to be determined. Step
                                             ups in this ratio to be determined.

     C.   NEGATIVE COVENANTS            Negative Covenants are as provided in
                                        the Existing Credit Agreement unless
                                        specifically modified herein.
<PAGE>
                                                                             18

                                        1.   Limitation on Indebtedness other
                                             than (i) in connection with the
                                             Senior Credit Facility, the Senior
                                             Subordinated Notes or the
                                             Subordinated Put Facility and (ii)
                                             customary exceptions to be agreed
                                             upon.

                                        2.   Limitation on Liens.

                                        3.   Limitation on Guarantee Obligations
                                             other than customary exceptions to
                                             be agreed upon.

                                        4.   Limitation on Fundamental Changes.

                                        5.   The Company shall not convey, sell,
                                             lease, assign, transfer or
                                             otherwise dispose of any of its
                                             property, business or assets except
                                             for the sale of inventory and light
                                             vehicles in the ordinary course of
                                             business and as otherwise provided
                                             in the Existing Credit Agreement.

                                        6.   Limitation on dividends and
                                             prohibition on the repurchase of
                                             common stock; provided that upon
                                             the occurrence of the Minimum
                                             Equity Event, the Company may
                                             purchase its common stock in an
                                             aggregate amount not to exceed
                                             $10,000,000 as provided in the
                                             Existing Credit Agreement.

                                        7.   Capital Expenditures - Capital
                                             expenditures shall not exceed
                                             amounts to be determined for each
                                             fiscal year ending 1999 through
                                             2003 and shall include carry-overs
                                             and adjustments for acquisitions to
                                             be agreed upon.

                                        8.   Restriction on Investments, Loans
                                             and Advances. Loans and advances to
                                             officers and employees shall be
                                             allowed in an aggregate amount not
                                             to exceed $5,000,000 at any time
                                             outstanding.

                                        9.   Limitation on Optional Payments and
                                             Modifications of Debt Instruments
                                             (including, except as provided for
                                             herein, the Put Facility) and
                                             Organizational Documents.

                                        10.  Limitation on Transactions with
                                             Affiliates.

                                        11.  Limitation on Sales and Leasebacks.

                                        12.  Limitation on Changes in Fiscal
                                             Year.
<PAGE>
                                                                             19

                                        13.  Limitation on Negative Pledge
                                             Clauses

                                        14.  Limitation on Lines of Business.

                                        11.  Limitation on Consolidated Lease
                                             Expense.

                                        Other Negative Covenants as appropriate
                                        and in the Existing Credit Agreement. If
                                        required to comply with Regulation U,
                                        certain of the foregoing restrictions
                                        with respect to stock of Dawson and
                                        other margin stock shall only apply to
                                        such stock ("Restricted Stock") to the
                                        extent such Restricted Stock represents
                                        no more than 25% of the value of the
                                        assets of the Company and its
                                        Subsidiaries.

     D.   EVENTS OF DEFAULT             1.   Payment default.

                                        2.   Breach of Representations or
                                             Warranties.

                                        3.   Violation of covenant(s).

                                        4.   Cross default to other debt.

                                        5.   Bankruptcy, insolvency.

                                        6.   Change of control.

                                        7.   Failure to consummate the Merger
                                             within 150 days of the Acquisition
                                             Date.

                                        Other Events of Default as appropriate
                                        and in the Existing Credit Agreement.

VII. CERTAIN OTHER TERMS
     -------------------

     A.   REQUIRED BANKS                For the purpose of making amendments or
                                        waivers to the Senior Credit Facilities,
                                        approval by Banks whose commitments
                                        under the Senior Credit Facilities
                                        aggregate at least a 51% majority will
                                        be required. However, unless agreed to
                                        by all Banks, no amendment or waiver
                                        shall change the principal amount,
                                        reduce the rate of interest or fees,
                                        postpone the scheduled payment of any
                                        principal, interest or fees, or change
                                        the definition of Required Banks.
<PAGE>
                                                                             20

     B.   ASSIGNMENTS AND
            PARTICIPATIONS              Banks will be permitted to assign and
                                        participate any of its Senior Credit
                                        Facilities. Assignments will be in
                                        minimum amounts of $5,000,000 and
                                        assignees will be subject to the consent
                                        of the Company and the Agent, such
                                        consent not to be unreasonably withheld.
                                        Voting rights to participants will be
                                        limited to change in principal amount,
                                        reduction of the rate of interest or
                                        fees, or postponement of the scheduled
                                        payment of any principal, interest or
                                        fees. Assignments will be subject to the
                                        payment by the assigning Bank of a
                                        $3,500 service fee to the Agent.

     C.   GOVERNING LAW                 Laws of the State of New York

     D.   AGENT'S COUNSEL               Simpson Thacher & Bartlett
<PAGE>
                                                                             21
<TABLE>
<CAPTION>
                                                           PRICING GRID A

                                                       KEY ENERGY GROUP, INC.

                                                      REVOLVING CREDIT FACILITY
                                                           (BASIS POINTS)

                    LEVEL I           LEVEL II          LEVEL III         LEVEL IV          LEVEL V           LEVEL VI
- -----------------------------------------------------------------------------------------------------------------------------
BASIS FOR PRICING   If the            If the            If the            If the            If the            If the
                    Consolidated      Consolidated      Consolidated      Consolidated      Consolidated      Consolidated
                    Leverage Ratio    Leverage Ratio    Leverage Ratio    Leverage Ratio    Leverage Ratio    Leverage Ratio
                    is less than or   is greater than   is greater than   is greater than   is greater than   is greater than
                    equal to 3.0 to   3.0 to 1.0 but    3.5 to 1.0 but    4.0 to 1.0 but    4.5 to 1.0 but    5.0 to 1.0.
                    1.0.              less than or      less than or      less than or      less than or
                                      equal to 3.5      equal to 4.0 to   equal to 4.5 to   equal to 5.0 to
                                      to 1.0.           1.0.              1.0.              1.0.
- -----------------------------------------------------------------------------------------------------------------------------
REVOLVER
- -----------------------------------------------------------------------------------------------------------------------------
<S>                    <C>               <C>                <C>               <C>                <C>                <C>
Base Rate +              0                 0                 25.0              50.0               75.0              100.0
LIBOR +                125.0             150.0              175.0             200.0              225.0              250.0
Commitment Fee          25.0              37.5               37.5              50.0               50.0               50.0
- -----------------------------------------------------------------------------------------------------------------------------
TRANCHE A
T/L FACILITY
- -----------------------------------------------------------------------------------------------------------------------------
Base Rate +              0                 0                 25.0              50.0               75.0              100.0
LIBOR +                125.0             150.0              175.0             200.0              225.0              250.0
- -----------------------------------------------------------------------------------------------------------------------------
TRANCHE B
T/L FACILITY
- -----------------------------------------------------------------------------------------------------------------------------
Base Rate +            100.0             100.0              125.0             125.0              125.0              150.0
LIBOR +                250.0             250.0              275.0             275.0              275.0              300.0
- -----------------------------------------------------------------------------------------------------------------------------
</TABLE>
<PAGE>
                                                                             22
<TABLE>
<CAPTION>
                                                           PRICING GRID B

                                                       KEY ENERGY GROUP, INC.

                                                      REVOLVING CREDIT FACILITY
                                                           (BASIS POINTS)
- -----------------------------------------------------------------------------------------------------------------------------
                    LEVEL I           LEVEL II          LEVEL III         LEVEL IV          LEVEL V           LEVEL VI
- -----------------------------------------------------------------------------------------------------------------------------
BASIS FOR PRICING   If the            If the            If the            If the            If the            If the
                    Consolidated      Consolidated      Consolidated      Consolidated      Consolidated      Consolidated
                    Leverage Ratio    Leverage Ratio    Leverage Ratio    Leverage Ratio    Leverage Ratio    Leverage Ratio
                    is less than or   is greater than   is greater than   is greater than   is greater than   is greater than
                    equal to 2.5 to   2.5 to 1.0 but    3.0 to 1.0 but    3.5 to 1.0 but    4.0 to 1.0 but    4.5 to 1.0.
                    1.0.              less than or      less than or      less than or      less than or
                                      equal to 3.0      equal to 3.5 to   equal to 4.0 to   equal to 4.5 to
                                      to 1.0.           1.0.              1.0.              1.0.
- -----------------------------------------------------------------------------------------------------------------------------
REVOLVER
- -----------------------------------------------------------------------------------------------------------------------------
<S>                    <C>               <C>                <C>               <C>                <C>                <C> 
Base Rate +              0                 0                  0                 0                 25.0               50.0
LIBOR +                 75.0             100.0              125.0             150.0              175.0              200.0
Commitment Fee          20.0              25.0               30.0              35.0               40.0               50.0
- -----------------------------------------------------------------------------------------------------------------------------
TRANCHE A
T/L FACILITY
- -----------------------------------------------------------------------------------------------------------------------------
Base Rate +              0                 0                  0                 0                 25.0               50.0
LIBOR +                 75.0             100.0              125.0             150.0              175.0              200.0
- -----------------------------------------------------------------------------------------------------------------------------
TRANCHE B
T/L FACILITY
- -----------------------------------------------------------------------------------------------------------------------------
Base Rate +             75.0              75.0               75.0             100.0              100.0              100.0
LIBOR +                225.0             225.0              225.0             250.0              250.0              250.0
- -----------------------------------------------------------------------------------------------------------------------------
</TABLE>

                    [Key Energy Group, Inc. Letterhead]

Key Energy Group, Inc.
News Release

For Immediate Release:                                 Contact: Jim Dean
Wednesday, August 26, 1998                             (732) 247-4822

      KEY ENERGY RECEIVES ADDITIONAL $150 MILLION FINANCING COMMITMENT

EAST BRUNSWICK, N.J., Aug. 26, 1998 - Key Energy Group, Inc. (NYSE:KEG) today
announced that it has received a commitment letter from Lehman Commercial Paper,
Inc. and Lehman Brothers, Inc. for $150 million in interim loans in connection
with Key's cash tender offer for all outstanding shares of common stock of
Dawson Production Services, Inc. (NYSE:DPS) at $17.50 per share.

As previously disclosed in Key's offer to purchase, Key has also received a
commitment for $550 million in senior secured credit facilities from PNC Bank,
N.A. Together the commitments with Lehman Brothers and PNC are sufficient to
fully finance Key's tender offer, refinance certain existing indebtedness of
Key, purchase Dawson's senior notes (if necessary) and pay related fees and
expenses.

The obligation of both PNC and Lehman Brothers to provide the funds under the
commitment letters are subject to certain conditions, including, among others,
the execution and delivery of definitive documentation.

As previously announced, Key commenced its cash tender offer for all outstanding
shares of Dawson common stock on August 17, 1998. The tender offer is currently
scheduled to expire at 12:00 midnight, New York City time, on Monday, September
14, 1998 unless the offer is extended. The tender offer is conditioned upon,
among other things, (1) there being validly tendered and not withdrawn before
the expiration date, a number of shares, which when added to the number of
shares beneficially by Key and its wholly-owned subsidiary, Midland Acquisition
Corp., will represent a majority of the total number of shares outstanding on a
fully diluted basis at the time the shares are accepted for payment pursuant to
the offer; (2) Key and Midland having received funds pursuant to an existing
financing commitment, in an amount sufficient to enable Key and Midland to
purchase all shares outstanding pursuant to the offer and the merger and having
obtained a definitive financing commitment for certain bridge financing to
refinance certain indebtedness of Dawson; and (3) expiration or termination of
any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements
Act of 1976. The complete terms and conditions of the tender offer, including
the financing arrangements, are set forth in the offering documents filed on
August 17, 1998 with the Securities and Exchange Commission and amendments
thereto filed with the Commission today.

Key Energy Group, Inc. is a holding company with diversified energy operations,
including well servicing, oilfield services, contract drilling and oil and
natural gas production. The company has operations in most major domestic
onshore producing regions and in Argentina.

                                    - # # # -

Contacts:
     Key Energy Group, Inc.:                      Abernathy MacGregor Frank:
     Jim Dean                                     Dan Katcher / Matt Sherman
     (732) 247-4822                               (212) 371-5999



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