The hunt for petroleum drives the Hunt family, which traces its oil interests back to legendary wildcatter H.L. Hunt. Petro-Hunt, L.L.C. controls Petro-Hunt, L.L.C. and Petro-Hunt International, L.L.C. (together known as the Petro-Hunt Group, one of the world's largest privately held independent energy concerns). Petro-Hunt, L.L.C. focuses on oil and gas exploration and production in the US. Petro-Hunt's other activities include gas processing, pipeline transportation and refining. Petro-Hunt, L.L.C. also controls Placid Refining Company, which operates a state-of-the-art 50,000 barrels-of-oil-per-day refinery in Louisiana. The Petro-Hunt Group, through the years, has also created separate stand alone companies in various sectors of the energy industry, some that have become the foundation for and/or substantial portions of other publicly traded companies.

PetroBakken Energy is developing its holdings in the Bakken oil shale play in southeast Saskatchewan. Formerly an oil and gas explorer and producer in Alberta and Saskatchewan, in 2009 PetroBakken Energy Ltd. (as TriStar Oil and gas) combined with the Canadian business unit of Petrobank Energy and Resources to form PetroBakken Energy, solely focused on the Bakken Shale play. PetroBakken Energy has estimated proved plus probable reserves of 127 million barrels of oil equivalent, and produces about 37,000 barrels per day. Petrobank Energy controls about two-thirds of the company. In 2010 PetroBakken Energy agreed to buy Canadian junior oil and gas firms Berens Energy for $319 million and Result Energy for $480 million.

Petrobras America is engaged in oil exploration and production in the Gulf of Mexico. Petrobras America Inc. also refines and markets oil and oil products and procures materials and equipment for its parent, PETROLEO BRASILEIRO (PETROBRAS). Petrobras America Inc. owns 50% of the Pasadena Refinery in Texas and has stakes in the Cascade, Chinook, and Cottonwood oil and gas fields in the Gulf of Mexico. Petrobras America is also engaged in the purchase and sale of petroleum products, including crude oil, fuel oil, gasoline, special products, naphtha, and liquid petroleum gas. Petrobras America Inc. procures oil services equipment and related supplies, primarily to support its operations in the Gulf of Mexico. Petrobras America Inc. Petrobras, a large integrated oil company is producing over 2. 2 million bbl/day worldwide and will be investing US$ 85 Billion over the next 5 years to increase this production to 3.5 million bbl/day. (PAI) was incorporated in 1987 in the United States. PAI corporate office is located in Houston, Texas.

Petroceltic is an independent upstream oil and gas exploration and production company with headquarters in Dublin, Ireland. Petroceltic International plc explores for and produces oil and gas in North Africa, the Mediterranean, and offshore Ireland. In Ireland, Petroceltic has interests in the Kinsale and Ballycotton gas fields and nearby areas. In North Africa, it has operations in southern Tunisia and in Algeria. In southern Tunisia, its focus of activity is in the Ksar Hadada region. Petroceltic also operates offshore Italy in the Adriatic Sea, as well as onshore in a developmental area. Formerly a miner called Ennex International, Petroceltic International plc changed its name and business in 2003. In 2008, Spanish utility Iberdrola paid $55 million for a 22% stake in Petroceltic.

PetroKazakhstan Inc. was founded in Canada in 1986 as Hurricane Hydrocarbons Ltd. The integrated oil and gas company, a joint China and Kazakhstan venture, produced some 54.5 million tons of oil in 2007. PetroKazakhstan Inc. primary assets are the Shymkent refinery, the Kumkol oil field, and 50% stakes in the Kazgermunai and Turgai Petroleum joint ventures). The group also owns a fleet of more than 4,000 railcars. PetroChina, a subsidiary of China National Petroleum Corporation (CNPC), owns two-thirds of PetroKazakhstan. Kazakhstan's KazMunaiGas Exploration Production (KMGEP) owns the remaining balance of shares. PetroKazakhstan’s business represents an integrated process chain covering activities from exploration and production of oil up to its processing into top-quality oil products and a developed marketing and transportation system.

Petroleum Geo-Services sends shockwaves around the world. Petroleum Geo-Services ASA provides seismic data and other oil and gas data services to customers operating mainly in the North Sea and Gulf of Mexico. Geophysical services include acquiring and processing 2-D, 3-D, and 4-D seismic data, 4-D reservoir imaging, and reservoir characterization studies. Petroleum Geo-Services operates 15 seismic vessels, and 23 seismic data processing centers. To raise cash to invest in its core offshore business, in 2009 Petroleum Geo-Services sold its onshore seismic data acquisition business to leading US seismic firm Geokinetics for $184 million, and a 12% stake in the company. PGS has offices in over 25 countries with regional centers in London, Houston and Singapore. Our headquarters is in Oslo, Norway and the PGS share is listed on the Oslo stock exchange (OSE:PGS).

Petrolifera Petroleum makes its living from the natural resources of South America. As a crude oil and natural gas exploration and production company, Petrolifera operates on more than 8 million acres of land located in Peru, Colombia, and Argentina. Petrolifera Petroleum Limited Argentine-based operations, which constitute the company's largest source of revenue, include a 100% stake in the Puesto Morales/Rinconada Concession in the Neuquen Basin. In 2007, Petrolifera produced an average of 8,000 bbl/d (barrels per day) of crude oil and more than 2,100 mcf/d (thousand cubic feet per day) of natural gas. Petrolifera Petroleum Limited largest shareholder is oil production company Connacher Oil and Gas, which owns about 25% of the company.

Peyto Energy Trust (formerly PEYTO Exploration & Development) invests in long-life gas projects in Alberta's Central Deep Basin. Through subsidiary Peyto Exploration, it focuses on the Sundance and Smoky/Kakwa areas and has proved reserves of 124.3 million barrels of oil equivalent. It also operates gas plants and more than 200 miles of gas gathering pipeline. The company pursues a strategy of developing long-lived reserves requiring low operating costs in order to secure a high return on capital.

Phoenix Technology Income Fund (formerly Phoenix Technology Services) looks to bring new life, in terms of profits, over and over again. It provides contracting services for oil and gas well drilling, specializing in directional and horizontal drilling. It also provides equipment, supervision, and technology services to oil and gas enterprises worldwide and has drilled more than 6,000 wells. In addition to drilling services, it sells its own drilling guidance systems. The income fund operates in Canada through Phoenix Technology Services and in the US through Nevis Energy Services. Phoenix Technology has operated since 1985 and was reorganized as a trust in 2004.

Pinnacle Gas Resources' mission culminates in the development of US natural gas reserves. The company focuses on acquiring and developing coalbed methane (CBM) properties in the Rocky Mountain region. It owns natural gas and oil leasehold interests in 477,000 gross (332,000 net) acres, primarily in the Powder River Basin and Green River Basin in Wyoming and Montana. Pinnacle Gas Resources owns interests in 663 gross wells on its properties. In 2008 the company had proved reserves of 27.7 billion cu. ft. of natural gas equivalent; that year Pinnacle Gas Resources drilled 117 gross (82 net) wells. A publicly traded corporation headquartered in Sheridan, Wyoming, Pinnacle Gas Resources, Inc. was formed in June of 2003 through a contribution of property by CCBM, Inc., a subsidiary of Carrizo Oil & Gas, Inc. (NASDAQ:CRZO), and Rocky Mountain Gas, Inc., a subsidiary of U.S. Energy, Inc. (NASDAQ:USEG), and a capital contribution by Credit Suisse First Boston.

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