Allis-Chalmers Energy Inc. (Allis-Chalmers) provides services and equipment to oil and natural gas exploration and production companies throughout the United States, including Texas, Oklahoma, Louisiana, Arkansas, Pennsylvania, New Mexico, Colorado, offshore in the Gulf of Mexico, and internationally primarily in Argentina, Mexico, and Brazil. Allis-Chalmers operates in three sectors of the oil and natural gas service industry: Oilfield Services, Drilling and Completion, and Rental Services. On August 1, 2008, the Company sold its drill pipe tong manufacturing assets. During the year ended December 31, 2008, the Company acquired BCH Ltd.