Calfrac Well Services Ltd. Second Quarter 2007 Earnings Release and Conference Call

    CALGARY, Aug. 1 /CNW/ - Calfrac Well Services Ltd. ("Calfrac") (TSX: CFW)
intends to release its Second Quarter 2007 results after the markets close on
Wednesday, August 8, 2007. A conference call has been scheduled for 10:00 a.m.
MST (12:00 p.m. EST) on Thursday, August 9, 2007. If you wish to participate
in the conference call, please call (800) 588-4942 or (416) 644-3424 prior to
the start of the call and ask for the Calfrac Well Services Ltd. conference
call. A webcast of the conference call may be accessed via the Company's
website at An update regarding the Company's activities will
be presented by D.R. (Doug) Ramsay, President and C.E.O. Following this update
there will be a question and answer period.
    A replay of the conference call will be available for review until
August 16, 2007. To listen to the recording, call (877) 289-8525 or (416)
640-1917 and ask for reservation 21241168 followed by the pound key.

    %SEDAR: 00002062E

For further information:

For further information: Calfrac Well Services Ltd., (403) 218-7491,
Lorraine Graham

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