P & B Oil Co.
P & R Oilfield Services
P J Oil Co.
P.O.&G. Operating, LLC
Packard Energy LLC
Packard, Lynn
Pada Petroleum, Inc.
Padgett Oil Inc.
Palmer Oil, Inc.
Palomino Petroleum, Inc.
Panaco, Inc.
Pantera Energy Company
Par Petroleum, Inc.
Par, Inc.
Parwest Land Exploration, Inc.
Patrick Development Corporation
Patriot Oil, LLC
Patterson Energy LLC
Patterson Operations LLC
Patterson, Robert J. Revocable Trust
Patteson Oil, a General Partnership
Patteson, Thomas Wade
Patty Creek Oil LLC
Paul Bowman Oil Trust
Paul's Oilfield Service
Pauley Oil
Paxco, Inc.
PDC Energy, Inc.
Peak Energy, LLC
Peak Oil Company LLC
Peak Operating LLC
Peewe Oil Co.
Pelican Hill Oil & Gas, Inc.
Pemberton, Don
Pemco, LLC
Pennmark Resources Company
PennzEnergy Exploration & Production LLC
Peoples Oil, LLC
Perkins Oil Enterprises, Inc.
Permian Reef, LLC
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Petex, Inc.
Petrie Exploration Company, Inc.
Petro Energies, Inc.
Petro Locators, Inc.
Petro River Operating, LLC
Petro-Haley
Petrol Oil & Gas, Inc.
Petroleum Inc
Petroleum Production Corporation
Petroleum Production Management, Inc.
Petroleum Property Services, Inc.
Petroleum Resource Management Company
Petroleum Technologies, Inc.
PetroSantander (USA) Inc.
Pfeifer Explorations, LLC
Pharyn Resources, LLC
Phil Groves Oil
Phillips Exploration Company L.C.
Phillips Oil Properties Inc.
Pickrell Drilling Company, Inc.
Pike Oil & Gas, Inc.
Pintail Petroleum, Ltd.
Pioneer Exploration Co.
Pioneer Exploration, LLC
Pioneer Feedyard, LLC
Pioneer Natural Resources USA, Inc.
Pioneer Natural Resources USA, Inc.
Pioneer Oil Co.
Pioneer Oil Company, Inc.
Pioneer Resources Inc.
Pipeline Oil & Gas, LLC
Piqua Petro, Inc.
Pitman, John Douglas Revocable Trust
Place, Steve
Plains Petroleum Operating Company
Plano Petroleum Corporation
Platte Valley Oil Co., Inc.
Plum Creek Energy, LLC
Poe Servicing Inc
Polaris Energy, Inc.
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Pollok Energy, LLC
Ponderosa Witching, LLC
Poor Boy Corporation
Popp Operating, Inc.
Post & Mastin Well Service, Inc.
PostRock Midcontinent Production LLC
Potato Creek, L.L.C.
Poverty Knob Production, LLC
Powell, Noah (Buck)
Prairie Energy LC
Prairie Fire Petroleum, LLC
Prairie Gas Operating, LLC
Prairie Methane Gas Producers LLC
Prairie Oil, LLC
Prater Oil & Gas Operations, Inc.
Pratt Well Service, Inc.
Premier Oil & Exploration Inc
Premier Petroleum, Inc.
Presco Western LLC
Pretz, Pauline Trust
Pride Energy Company, a General Partnership
Primal Energy O&G, LLC
Prime Operating Company
Primexx Operating Corporation
Princ, Frank
Priority Oil & Gas LLC
Production Drilling, Inc.
Production Maintenance Service
Prolific Resources LLC
Prospect Oil & Gas Corp
Prospective Inv. & Trading Co., Ltd., The
Protege Energy LLC
Prothe, Dale E. and Linda L., a General Partnership
Pryor, Victor W., Jr.
PT Oil LLC
Ptarmigan Inc
Pyle Petroleum, Inc.
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