X0303 4 2010-12-29 0 0000003982 Allis Chalmers Energy Inc. ALY 0001252184 KEANE TERRENCE P 5075 WESTHEIMER, SUITE 890 HOUSTON TX 77056 0 1 0 0 Sr Vice Pres-Oilfield Services Common Stock 2010-12-29 4 F 0 4233 6.76 D 158866 D Common Stock 2010-12-29 4 A 0 80000 6.76 A 238866 D Common Stock 2010-12-29 4 F 0 22569 6.76 D 216297 D Effective December 29, 2010, the Compensation Committee of the Board of Directors of the Issuer approved the acceleration of the vesting of 15,000 shares of restricted stock. 4,233 of such shares were withheld to satisfy tax obligations in connection with the vesting of such shares. Effective December 29, 2010, the Compensation Committee of the Board of Directors of the Issuer approved the acceleration of the vesting of 80,000 shares of performance-based restricted stock. These shares were withheld to satisfy tax obligations in connection with the vesting of 80,000 shares of performance-based restricted stock. The decision to accelerate the vesting of such equity was done to provide certain tax benefits to the Reporting Person and the Issuer. /s/ Theodore F. Pound III through POA 2011-01-03