X0202 4 2005-02-10 0000003982 Allis Chalmers Energy Inc. ALCM 0001167766 WHITENER THOMAS O JR 5956 SHERRY LANE, SUITE 900 DALLAS, TX 75225 1 0 0 0 Common Stock 2005-02-10 4 S 0 80000 3.00 D 2311062 I By Energy Spectrum Partners, LP The reporting person serves as a director at the request of Energy Spectrum Partners LP ("ES"). The reporting person disclaims beneficial ownership of all except 36,746 of the total shares owned by ES, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Thomas O. Whitener, Jr. 2005-02-14