X0202 4 2008-05-14 0 0000003982 Allis Chalmers Energy Inc. ALY 0001362467 Collins Steven L 5075 WESTHIEMER #890 HOUSTON TX 77056 0 0 0 1 Please see Remarks Common Stock 2008-05-14 4 M 0 8333 10.85 A 8333 D Common Stock 2008-05-14 4 S 0 2300 17.7656 D 6033 D Common Stock 2008-05-14 4 S 0 400 17.76 D 5633 D Common Stock 2008-05-14 4 S 0 5633 17.7699 D 0 D Stock Option (right to buy) 10.85 2008-05-14 4 M 0 8333 0 D 2007-12-15 2015-12-15 Common Stock 8333 0 D President of Allis-Chalmers Production Services LLC /s/ Steve Collins 2008-05-14