X0303 4 2009-06-25 0 0000003982 Allis Chalmers Energy Inc. ALY 0001456839 Associated Petroleum Investors Ltd. 5075 WESTHEIMER SUITE 890 HOUSTON TX 77056 0 0 1 0 Common Stock 2009-06-25 4 M 0 4040307 2.5 A 7101146 D Common Stock 2009-06-25 4 M 0 1320000 2.5 A 2320000 I By Global Oilfield Holdings Limited Subscription Rights (Right to Buy) 2.5 2009-06-25 4 M 0 4040307 0 D 2009-06-03 2009-06-19 Common Stock 4040307 0 D Subscription Rights (Right to Buy) 2.5 2009-06-25 4 M 0 1320000 0 D 2009-06-03 2009-06-19 Common Stock 1320000 0 I By Global Oilfield Holdings Limited These shares are owned directly by Global Oilfield Holdings Limited, which is a wholly owned subsidiary of Associated Petroleum Investors Ltd. The Reporting Person received at no cost from the Issuer, rights to purchase one share of common stock for every share of common stock owned plus rights to subscribe for additional shares up to 32% of the shares of common stock for which it was otherwise entitled to subscribe in the event not all shares of common stock were subscribed for initially. This Form 4 reports the exercise of subscription rights by the Reporting Person. Receipt of subscription rights was not reported because such receipt is exempt under rule 16a-9(b). /s/ Theodore F. Pound III through Power of Attorney 2009-06-29