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Petroleum Development Corporation is a Denver, CO-based company in the Energy & Utilities sector.
US Lubes is a Upper Marlboro, MD-based company in the Energy and Utilities sector.
Walter Oil & Gas Corp. is a Houston, TX-based company in the Energy and Utilities sector.
RigEye Services is a Denver, CO-based company in the Energy and Utilities sector.
Seneca Resources Corporation, the exploration and production segment of National Fuel Gas Company, headquartered in Houston, Texas, explores for, develops and produces natural gas and oil reserves in California, Kansas and the Appalachian Region including the Marcellus and Utica Shales.