David W. Wehlmann

Part of Osaka Gas Co., Ltd., Convest Energy Corp. is a private company that produces and markets oil and gas. The company is based in Houston, TX. Convest Energy was acquired by Forcenergy, Inc., a SUB of Osaka Gas Co., Ltd. from Edisto Resources Corp. on October 22, 1997 for $25.97 million.

Grey Wolf, Inc. provides contract oil and gas land drilling services. The company was founded in 1980 and is headquartered in Houston, TX.

Omega Protein Corp. engages in the development, production, and delivery of healthy products throughout the world to improve the nutritional integrity of foods, dietary supplements and animal feeds. The company was founded by John A. Haynie and Thomas W. Haynie on January 1, 1878 and is headquartered in Reedville, VA.

Cano Petroleum, Inc. operates as an independent oil and natural gas company. The company was founded by Jeffery S. Johnson in 1997 and is headquartered in Tulsa, OK.

Precision Drilling Trust provides contract drilling and other oilfield services to the Canadian oil and natural gas industry. Its services include oilfield supplies and rentals, oilfield trailers and rig site camp and catering services. It operates in two segments, contract drilling services & completion and production services. The company was founded in 1951 and is headquartered in Calgary, Canada

Xtreme Drilling Corp. engages in the provision of onshore drilling services in United States. Its activities include design, building, owning, and operation of a fleet of proprietary, high specification drilling rigs. The company was founded by Thomas D. Wood, Randolph M. Charron, and Kyle W. Swingle on May 24, 2005 and is headquartered in Calgary, Canada.

Paragon Offshore Plc provides standard specification offshore drilling services. The company was founded in 2014 and is headquartered in Houston, TX.