James B. Terry

Society of Petroleum Engineers, Inc. provides petroleum engineering services. The non-profit company is based in Allen, TX and has subsidiaries in United States, India and Canada.

The Independent Petroleum Association of America manufactures oil and natural gas. The non-profit company is based in Washington. Barry Russell has been the CEO of the American company since 1980.

Weatherford International Ltd. provides equipment and services to the oil and natural gas exploration and production industry. The company was founded in 1972 and is headquartered in Geneva, Switzerland.

Smith International, Inc. provides premium products and services used for the drilling, completion and production phases of oil and natural gas development activities. It has three operating divisions, namely M-I SWACO, Smith Oilfield and Distribution. Company was founded in 1902 and is headquartered in Houston, TX.

Particle Drilling Technologies, Inc. is an oilfield service and technology company that develops advanced drilling technology. It commercializes patented particle impact drilling system, which is designed to provide a radical increase in penetration rates for drilling oil and gas wells, particularly through deep hard and abrasive zones or other difficult to drill formations. The company is headquartered in Houston, TX.