P & M Petroleum Management LLC. P. T. Indospec Pacalta Resources Ltd. Pacificorp Energy Palm Energy Partners LLC. Pan American Energy LLC. Panaco Inc. Panda Oil & Gas Corp. Panhandle Eastern Pipeline Co. Panther Creek Resources Paragon Engineering Services Inc. Pardee Exploration Co. Park Avenue Exploration Corp. Patara Oil & Gas Paxton U.S. Inc. Pearl Exploration & Production Pecos Production Co. Pegasus Capital Advisors LP. Pel-Tex Oil Co. Pendaries Petroleum Ltd. Pendragon Resources II Pennaco Energy Inc. Pennsylvania Castle Energy Corp. Penntex Resources LP. Pennzenergy Co. Penroc Oil Corp. Peoples Energy Corp. Peregrinus Participants Inc. Perez Companac SA. Permtex Petech Enterprises Inc. Petrie Parkman & Co. Petro Capital Securities Petro-Canada Resources Petro-Guard Production LLC. Petro-Star Energy Petrobell Inc. Petrocorp Inc. Petroflow Energy Ltd. Petroglyph Energy Inc. Petrolatina Energy PLC. Petrolera Santander Inc. Petrolex Energy Corp. Petroneft Resources PLC. Petroreconcava SA. Petrosearch Energy Corp. Petrotex Engineering Co. Petsec Energy Inc. Phelps Dunbar LLP. Phoenix Explorations Co. LP. Pine Resources Corp. Pinto Energy Venice LP. Pioneer Resources USA Inc. Placid Oil Co. Plains Resources Inc. Platform Resources Inc. Player Petroleum Corp. PM Lucas Enterprises Ltd. Pogo Producing Co. Porter & Hedges LLP. Potato Creek LLC. PPC Energy LP. Prairie Petroleum LLC. Praxair Inc. Premier-Kufpec Exploration Pakistan Presco Inc. Preston Exploration LLC. Preston, Thorgrimson, Shidler Prima Energy Corp. Prima Oil and Gas Co. Primary Natural Resources Inc. Prime Offshore LLC. PrimeEnergy Corp. Probe Resources Inc. Productos Industriales Venezulanos SA. Professional Development Institute Projector SA. Pronto Oil Field Services Ltd. Province Resources Pruet Offshore Co. Public Gas Partners Pure Petroleum LLC. Pursuit Exploration Co. LL. PYR Energy Corp. |
P & P International Inc. P. T. Karsarawat Pratama Pacific Gas and Electric Co. Pacifpetrol Paloma Resources LLC. Pan Canadian Resources Panda Energy International Inc. Panenergy Field Services Inc. Pantera Energy Group LLC. Panther Resources Corp. Paramount Petroleum Co. Pardee Minerals LLC. Parker & Parsley Petroleum Co. Patina Oil & Gas Corp. Payne Investments Inc. Pease Oil & Gas Co. Pegasi Energy Corp. Pegaz Energy Inc. Pemex Exploracion y Produccion Pendragon Energy Partners Inc. Penn Virginia Oil & Gas Pennpoint Pennsylvania General Energy Corp. Pennwell Pennzoil Canada Pentagon Petroleum Peregrine Oil & Gas Perenco Permian Resources Inc. Peru Power Holdings Petra Petroleum Inc. Petro Bank Energy & Resources Ltd. Petro Equities Ltd. Petro-Guard Co. Inc. Petro-Hunt Corp. Petrobank Energy Resources Ltd. Petrobras America Inc. Petrofac Resources International Petroglobe Inc. Petrogulf Corp. Petroleos de Venezuela Petroleum Inc. Petrominerals Corp. PetroQuest Energy LLC. Petrosantander Inc. Petrotech Resources Petrovera Resources Ltd. Peyto Exploration & Development Phillips Petroleum Co. Pico Petroleum Services & Investments Pinnacle Resources Pioneer Natural Resources USA Inc. Pipeline & Processing Group Inc. Plains Petroleum Co. Plantation Resources Partners Ltd. Playa Minerals & Energy Inc. Pluspetrol International Inc. Poco Petroleums Ltd. Pomoco LLC. Post Oak Energy Capital LP. Powermax Energy Inc. PPP LLP. Prator Bett LLC. Pray, Walker, Jackman, Williamson Premium Resources Group LLC. Presidio Oil Co. Preston, Reynolds & Co. Inc. PriceWaterhouseCoopers Prima Exploration Inc. Primary Energy Corp. Prime Natural Resources Inc. Prime West Energy Inc. Probe Offshore LLC. Probel Capital Management NV Profertil SA. Progress Fuels Corp. Prokom Investments SA. Prospect Energy Corp. Prudential-Bache Capital Funding PTT Exploration & Production Public Works & Government Services Canada Pure Resources Inc. Pursuit Resources Corp. |