X0202 4 2005-12-16 0000003982 Allis Chalmers Energy Inc. ALY 0001232680 WILDE DAVID 5075 WESTHEIMER, SUITE 890 HOUSTON, TX 77056 0 1 0 0 President and COO Option to Purchase Common Stock 10.85 2005-12-16 4 A 0 90000 0 A 2015-12-16 Common Stock, par value $.01 per share 90000 90000 D The option is exercisable (a) immediately with respect to 30,000 shares, (b) on December 16, 2006 with respect to 30,000 shares, and (c) on December 16, 2007 with respect to 30,000 shares. Grant under employee stock option plan. /s/ David Wilde 2006-01-19