X0303 4 2011-02-23 1 0000003982 Allis Chalmers Energy Inc. ALY 0001352001 Tankel Zane 550 MAMARONECK AVE., #101 HARRISON NY 10528 1 0 0 0 Common Stock 2011-02-23 4 P 0 50000 6.83 A 293280 D Common Stock 2011-02-23 4 D 0 293280 D 0 D These shares were disposed of pursuant to an Agreement and Plan of Merger among the Issuer, Seawell Limited and Wellco Sub Company, a wholly-owned subsidiary of Seawell Limited, dated August 12, 2010, as amended. The Reporting Person received 1.15 shares of Seawell Limited common stock for 243,280 shares of Allis-Chalmers common stock owned and $4.25 per share for the remaining 50,000 shares. /s/ Theodore F. Pound III through POA 2011-02-23