HOVENSA is among the top ten largest refineries in the world. The company became the owner and operator of the former Hess Oil Virgin Islands Corp. (HOVIC) refinery on October 30, 1998. HOVIC, a wholly owned Virgin Islands subsidiary of Hess Corporation, was established to construct and operate an oil refinery in coordination with the Virgin Islands Government’s efforts in the 1960’s to diversify the economy of the islands. HOVENSA provides employment to approximately 2,500 people in a culturally diverse workforce through its payroll and that of several maintenance contractors.

TGC Industries, Inc. provides geophysical services for clients in the oil and gas industry in the continental United States and Canada. TGC Industries, Inc. conducts Three-D surveys and offers seismic data acquisition services primarily to domestic onshore oil and natural gas exploration and development companies for use in the onshore drilling and production of oil and natural gas. TGC Industries, Inc. also owns a data bank that contains gravity data and magnetic data, from oil and natural gas producing areas located in the United States. As of December 31, 2009, TGC Industries operated 11 seismic crews, which supplied seismic data to companies engaged in the domestic exploration and development of oil and natural gas on land and in land-to-water transition areas. The company was formerly known as Tidelands Geophysical Co., Inc. and changed its name to TGC Industries, Inc. in July 1986. TGC Industries, Inc. was founded in 1967 and is headquartered in Plano, Texas.

Helix Energy Solutions Group, Inc. operates as an offshore energy company. Helix Energy Solutions Group, Inc. provides development solutions and various other contracting services to the energy market, as well as to its oil and gas properties. Helix Energy Solutions Group, Inc. provides a range of contracting services primarily in the Gulf of Mexico, North Sea, the Asia Pacific, and West Africa regions primarily in deepwater. Helix Energy Solutions Group, Inc. offers development services comprising installation of subsea pipelines, flowlines, control umbilicals, manifolds, and risers; pipelay and burial; installation and tie-in of riser and manifold assembly; commissioning, testing, and inspection services; and cable and umbilical lay and connection. Helix Energy Solutions Group, Inc. also provides various production services, including inspection, repair, and maintenance of production structures, risers, pipelines, and subsea equipment; well intervention; life of field support; and intervention engineering. In addition, Helix Energy Solutions Group, Inc. offers decommissioning and remediation services; plugging and abandonment services; platform salvage and removal services; pipeline abandonment services; and site inspections. Helix Energy Solutions Group, Inc. offers its products and services to independent oil and gas producers and suppliers, pipeline transmission companies, and offshore engineering and construction firms. Helix Energy Solutions Group, Inc. was formerly known as Cal Dive International, Inc. and changed its name to Helix Energy Solutions Group, Inc. in March 2006. Helix Energy Solutions Group was founded in 1990 and is headquartered in Houston, Texas.

State-owned Perusahaan Pertambangan Minyak Dan Gas Bumi Negara (Pertamina) controls the entire oil and gas industry in Indonesia, and is the world's largest producer and exporter of liquefied natural gas (LNG). Pertamina also works with foreign petroleum companies, but solely on a contract basis. Pertamina has estimated proved reserves of 4 billion barrels of oil and 2.7 trillion cu. meters of natural gas, and operates seven oil refineries, and has numerous LNG, LPG, shipping, and fuel businesses. Pertamina also invests heavily in the development of geothermal energy as an alternative energy source.

Tauber Oil Company has earned it's reputation for reliable performance and untarnished character. Far more than a speculative trading company, Tauber is a service oriented marketing company where you can expect and receive the expertise of a specialist. No petrochemical product is taboo for oil refiner and marketer Tauber Oil. The company markets refined petroleum products, natural gas, carbon black feedstocks, liquefied petroleum gases, chemicals, and petrochemicals (including benzene, styrene monomer, and methanol). It buys and sells about 225,000 barrels of petroleum products a day. Tauber Oil is one of the US's leading suppliers of feedstocks for reforming and olefin cracking. Subsidiary Tauber Petrochemical was created in 1997 to beef up the company's international petrochemical business. Tauber Oil, which is owned by David and Richard Tauber, maintains a fleet of more than 500 rail cars to supply its customers.

Noble Energy, Inc. was founded in 1932 and is based in Houston, Texas. Noble Energy, Inc., through its subsidiaries, engages in the acquisition, exploration, development, production, and marketing of crude oil, natural gas, and natural gas liquids in the United States and internationally. Noble Energy, Inc. operates and holds interests in properties, including Wattenberg field and Piceance basin located in Colorado; San Juan basin in northwestern New Mexico and southwestern Colorado; Niobrara field in the tri-state area (eastern Colorado, extending into Kansas and Nebraska); Bowdoin field in north central Montana; and the Wind River basin in central Wyoming. Noble Energy, Inc. also holds properties in Texas, Panhandle, Oklahoma and Kansas deepwater Gulf of Mexico, Louisiana, Illinois, Indiana, and other areas. Noble Energy also operates in Equatorial Guinea and Cameroon in West Africa, the North Sea, Israel, Ecuador, China, and Suriname.

HKN, Inc. was founded in 1973 and is based in Southlake, Texas. HKN, Inc., together with its subsidiaries, engages in the exploration, exploitation, development, and production of oil and gas properties primarily in the onshore and offshore Gulf Coast regions of south Texas and Louisiana. HKN, Inc. also explores and develops coal bed methane in Indiana and Ohio. As of December 31, 2008 HKN, Inc. operated or owned a non-operating working interest in 66 oil wells, 68 gas wells, and 12 injection wells.

Jayhawk Pipeline is not the process for producing University of Kansas mascots. What it is is a subsidiary of National Cooperative Refinery Association that transports more than 110,000 barrels per day of crude oil via both intrastate and interstate pipelines in Kansas. It operates 1,200 miles of gathering and trunk lines throughout Kansas, Nebraska, Oklahoma, and Texas. It also manages the business of Kaw Pipe Line Company. National Cooperative Refinery Association provides three farm supply cooperatives (Cenex Harvest States, GROWMARK, and MFA Oil) with fuel through its oil refinery in Kansas.

Patterson-UTI Energy, Inc. provides onshore contract drilling services to independent oil and natural gas operators in North America. It offers pressure pumping services, including well stimulation and cementing for completion of new wells, and remedial work on existing wells to oil and natural gas operators primarily in the Appalachian Basin. Patterson-UTI Energy, Inc. provides contract drilling services principally in Texas, New Mexico, Oklahoma, Arkansas, Louisiana, Mississippi, Colorado, Utah, Wyoming, Montana, North Dakota, Pennsylvania, and West Virginia, as well as western Canada. Patterson-UTI Energy, Inc. also owns and invests in oil and natural gas assets located primarily in Texas and New Mexico. As of February 11, 2010, the company had approximately 350 marketable land-based drilling rigs. Patterson-UTI Energy, Inc. was founded in 1978 and is headquartered in Houston, Texas.

Quicksilver Resources Inc. was founded in 1997 and is headquartered in Fort Worth, Texas with additional offices in Cut Bank, Montana; Glen Rose, Texas; and Calgary, Canada. Quicksilver Resources Inc., an independent energy company, engages in the acquisition, exploitation, exploration, development, production, and sale of natural gas, natural gas liquids, and crude oil in North America. Quicksilver Resources Inc. also involves in marketing, processing, and transmission of natural gas. Quicksilver Resources Inc. has interests in the Barnett Shale play in the Fort Worth Basin in north Texas; and the Rocky Mountain properties located in Montana and Wyoming, as well as interests in 127,000 contiguous acres in the Horn River Basin in northeast British Columbia. Quicksilver Resources Inc. also holds interests in the Canadian CBM properties in Alberta, Canada, as well as exploring the Delaware Basin in West Texas. Quicksilver Resources Inc. sells natural gas and crude oil to various customers, including utilities, oil and natural gas companies or their affiliates, industrial companies, trading and energy marketing companies, and other users of petroleum products. As of December 31, 2008, Quicksilver Resources Inc. had total estimated total proved reserves of 2.2 trillion cubic feet equivalents of natural gas. Quicksilver Resources Inc. has a strategic alliance with Enia S.p.A. to explore properties in the Fort Worth Basin.

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