David S. Krueger

Magnum Hunter Resources, Inc. provides oil exploration and drilling services. The company is headquartered in Irving, TX

GreenHunter Resources, Inc. provides water resource, waste management, and environmental services. The company was founded by Gary C. Evans on June 7, 2005 and is headquartered in Grapevine, TX.

Sulphur River Exploration, Inc. operates as an oil and gas company. The private company is based in Dallas, TX.

Part of ConocoPhillips, Cimarron Gas Holding Co. is a company that processes gas and markets natural gas liquids. The company is based in Tulsa, OK. Cimarron Gas Holding was acquired by Conoco, Inc. from Zapata Corp. on December 31, 1996 for $24 million.

Blue Ridge Mountain Resources, Inc. engaged in the exploration for and the exploitation, acquisition and development of crude oil, natural gas and natural gas liquids resources in the United States and Canada. It operated through the following segments: Upstream, Midstream, and Oilfield Services. The Upstream segment refers to the exploration and production of crude oil and natural gas within the boundaries of United States and Canada. The Midstream segment consists primarily of Eureka Midstream Holdings, which markets natural gas and operates a network of pipelines and compression stations that gather natural gas and Natural gas liquids in the United States for transportation to market. The Oilfield Services segment provided drilling services to oil and natural gas exploration and production companies. The company was founded on June 4, 1997 and was headquartered in Irving, TX.