X0303 4 2009-06-25 0 0000003982 Allis Chalmers Energy Inc. ALY 0001425197 Patterson Mark C 5075 WESTHEIMER, SUITE 890 HOUSTON TX 77056 0 1 0 0 See Remarks. Common Stock 2009-06-25 4 M 0 2000 2.5 A 12000 D Subscription Rights (Right to Buy) 2.5 2009-06-25 4 M 0 2000 0 D 2009-06-03 2009-06-19 Common Stock 2000 0 D 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). The Reporting Person is Senior Vice President - Rental Services of the Issuer and President of Allis-Chalmers Rental Services LLC. /s/ Theodore F. Pound III through POA 2009-06-26