X0202 4 2006-12-18 0 0000003982 Allis Chalmers Energy Inc. ALY 0001367368 Adams Burt A 5075 WESTHEIMER SUITE 890 HOUSTON TX 77056 1 1 1 0 Pres, COO & Vice Chairman Common Stock 2006-12-18 4 A 0 3200000 0 A 3200000 I By Oil & Gas Rental Services, Inc. These shares were issued to Oil & Gas Rental Services, Inc. ("OGR") as partial consideration for substantially all of the assets of OGR pursuant to an Asset Purchase Agreement dated October 25, 2006. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose. /s/ Burt A. Adams 2006-12-19