EXHIBIT 1

JOINT FILING AGREEMENT

     We, the signatories of this statement on Schedule 13G filed with respect to the Common Stock of Basic Energy Services, Inc., to which this Agreement is attached, hereby agree that such statement is, and any amendments thereto filed by any of us will be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) of the Securities Exchange Act of 1934.

     Dated: February 9, 2006.

FIRST RESERVE FUND VIII, L.P.
By:	First Reserve GP VIII, LP, its General Partner,
	By:      First Reserve Corporation
	its General Partner
By:	/s/ Anne E. Gold
	Name:  Anne E. Gold
	Title:    General Counsel
FIRST RESERVE GP VIII, LP
By:	First Reserve Corporation, its General Partner
By:	/s/ Anne E. Gold
	Name:   Anne E. Gold
	Title:     General Counsel
FIRST RESERVE CORPORATION
By:	/s/ Anne E. Gold
	Name:   Anne E. Gold
	Title:     General Counsel