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                                  UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549


                                    FORM 8-K


                 CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

         Date of Report (Date of earliest event reported): July 20, 2004




                        NATURAL GAS SERVICES GROUP, INC.
             (Exact Name of Registrant as Specified in Its Charter)



            Colorado                       1-31398               75-2811855
  (State or other jurisdiction         (Commission File        (IRS Employer
of Incorporation or organization)           Number)          Identification No.)




2911 South County Road 1260 Midland, Texas                         79706
 (Address of Principal Executive Offices)                        (Zip Code)



                                  432-563-3974
              (Registrant's telephone number, including area code)






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Item 5.  Other Events and Regulation FD Disclosure.

         On July  20,  2004,  Natural  Gas  Services  Group,  Inc.  and  CBarney
Investments,  Ltd.  entered into a  Securities  Purchase  Agreement.  Under this
agreement, Natural Gas Services Group agreed to issue and sell 649,574 shares of
its common  stock to  CBarney at  $7.69736  per share.  The per share  price was
determined by multiplying  (x) $8.747,  the average  closing market price of the
common stock on the American Stock Exchange for the twenty  consecutive  trading
days ended July 15, 2004, times (y) eighty-eight  percent.  Natural Gas Services
Group will receive aggregate gross proceeds of $5,000,000.00.

         We plan to use the net  proceeds  from the sale of the stock to advance
the growth of our rental fleet of natural gas  compressors,  working capital and
general  corporate  purposes,  including  possible  acquisition of strategically
located compressor  companies.  Subject to certain  exceptions  contained in the
agreement, we are prohibited from using the proceeds to:

         o        pay dividends;

         o        pay for an increase in executive compensation or make any loan
                  or advance to any officer, employee, shareholder,  director or
                  other affiliate of Natural Gas Services Group; or

         o        purchase debt or equity  securities  of any entity  (including
                  our own securities).

         Natural Gas Services Group agreed to file a  registration  statement to
register  the resale of the common stock  within  sixty days from  closing.  The
Company also agreed to permit a representative selected by CBarney to attend and
observe  meetings of the Board of Directors  of the Company,  subject to certain
conditions.

         Under the agreement,  for a period of twenty-four  months following the
closing,  CBarney  will have the  right,  subject  to  certain  limitations,  to
participate  with respect to the issuance of (a) future equity or  equity-linked
securities,  and (b) debt which is convertible  into equity or in which there is
an equity component  (collectively,  the "Additional  Securities"),  on the same
terms  and  conditions  as  offered  by  Natural  Gas  Services  Group  to other
purchasers of such Additional Securities.  CBarney's  participation right is not
applicable to:

         o        the issuance or sale of  securities  to  employees,  officers,
                  directors,  or  consultants  of Natural Gas Services Group for
                  the  primary   purpose  of  soliciting   or  retaining   their
                  employment  or service  pursuant  to a stock  option  plan (or
                  similar  equity  incentive  plan)  approved  by the  Board  of
                  Directors and the shareholders of Natural Gas Services Group;

         o        the conversion of any  convertible  or exercisable  securities
                  outstanding as of the closing;



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         o        the issuance of shares of common stock of Natural Gas Services
                  Group in connection with an underwritten public offering; or

         o        the  issuance  of  securities  in  connection   with  mergers,
                  acquisitions,   strategic   business   partnerships  or  joint
                  ventures.

         Natural Gas Services Group has not engaged any  underwriters,  brokers,
agents or finders in  connection  with the agreement or the issuance and sale of
the shares.

         Before the earlier of the  termination of the agreement or the closing,
the  agreement  prohibits  Natural  Gas  Services  Group from  entering  into an
"alternative  transaction",  defined as any transaction with a person other than
CBarney  relative to the sale of equity  securities (or instruments  convertible
into  equity  securities)  of Natural  Gas  Services  Group for cash (other than
equity  securities  issued pursuant to options,  warrants and other  instruments
convertible into equity  securities  outstanding on the date of the agreement in
accordance with their terms) or that would  materially  impede the  transactions
contemplated by the agreement.

         CBarney and its representatives and agents have the right, no more than
twice in any year,  to visit and  inspect any of the  properties  of Natural Gas
Services Group, to examine its books of account and records,  and to discuss the
affairs,  finances and accounts of Natural Gas Services Group with its officers,
employees and independent public accountants.

         The  agreement is subject to customary  closing  conditions , including
the approval by the American  Stock  Exchange of the common stock for listing on
AMEX. Closing under the agreement is scheduled to occur not later than August 4,
2004.  The agreement may be terminated by either CBarney or Natural Gas Services
Group if the closing does not occur by August 4, 2004.

         The  issuance  and sale of the common  stock is being made in  reliance
upon the exemption from registration under Section 4(2) of the Securities Act of
1933, as amended,  as a transaction not involving a public offering.  All of the
shares,  upon issuance,  will be "restricted"  securities  within the meaning of
Rule 144 under the Securities Act and will bear a legend to that effect.

         The foregoing is a summary of the material  features of the  agreement.
This summary does not purport to be complete and is qualified in its entirety by
reference to the terms of the  agreement,  which is filed as Exhibit 4.1 to this
Current Report on Form 8-K, and incorporated herein by reference.

         A press release dated July 21, 2004,  announcing the Agreement is filed
herewith as Exhibit 99.1 and is also incorporated herein by reference.





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Item 7.  Financial Statements and Exhibits.

         (c)      Exhibits

         The Exhibits  listed below are filed as part of this Current  Report on
Form 8-K.

                  Exhibit No.                        Description

                     4.1            Securities  Purchase  Agreement,  dated July
                                    20,  2004,   between  Natural  Gas  Services
                                    Group, Inc. and CBarney Investments, Ltd.


                    99.1            Press Release dated July 21, 2004, issued by
                                    Natural Gas Services Group, Inc.
























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                                   SIGNATURES

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


                        NATURAL GAS SERVICES GROUP, INC.



                                            By:    /s/ Wallace C. Sparkman
                                               ---------------------------------
                                               Wallace C. Sparkman, President


Dated:  July 22, 2004





























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