X0202 4 2006-11-30 0 0000003982 Allis Chalmers Energy Inc. ALY 0001317824 Bryan David Keith 5075 WESTHEIMER, #890 HOUSTON TX 77056 0 0 0 1 See Remarks Common Stock 2006-11-30 4 M 0 15000 2.75 A 15000 D Common Stock 2006-11-30 4 S 0 5103 20.15 D 9897 D Common Stock 2006-11-30 4 S 0 397 20.16 D 9500 D Common Stock 2006-11-30 4 S 0 8061 20.2 D 1439 D Common Stock 2006-11-30 4 S 0 100 20.21 D 1339 D Common Stock 2006-11-30 4 S 0 1000 20.25 D 339 D Common Stock 2006-11-30 4 S 0 339 20.26 D 0 D Stock Option (right to buy) 2.75 2006-11-30 4 M 0 15000 0 D 2006-12-15 Common Stock 15000 15000 D 10,000 of these shares vested on December 16, 2003 and 5,000 of these shares vested on December 16, 2004. The Reporting Person is the President and CEO of Strata Directional Technology, Inc. /s/ David Bryan 2006-12-01