X0303 4/A 2011-02-23 2011-02-23 1 0000003982 Allis Chalmers Energy Inc. ALY 0001467747 Dell' Orto Giovanni 5075 WESTHEIMER, SUITE 890 HOUSTON TX 77056 1 0 0 0 Common Stock 2011-02-23 4 D 0 12500 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 each share of Allis-Chalmers common stock owned. The sole purpose of this Amendment is to include a check mark in the exit box to show the Reporting Person is no longer subject to Section 16 reporting. /s/ Theodore F. Pound III through POA 2011-02-25