Rex Energy Corporation operates as an independent oil and gas company in the Illinois Basin and the Appalachian Basin. The oil and gas exploration and production company has estimated proved reserves of 11 million barrels of oil equivalent, primarily from three regions: the Illinois Basin (in Illinois and Indiana) and the Appalachian Basin (Pennsylvania and West Virginia). Rex Energy Corporation owns interests in the Lawrence Field ASP Flood project, which is an oil recovery project located in Lawrence County, Illinois; and the Marcellus Shale drilling projects located in Pennsylvania in the Appalachian Basin. As of December 31, 2008, Rex Energy Corporation operated approximately 2,314 wells. Rex Energy Corporation has a joint venture agreement with Stonehenge Energy Resources, L.P. to build a high pressure gathering system and cryogenic gas processing plant in Butler County, Pennsylvania. Rex Energy Corporation was incorporated in 2007 and is headquartered in State College, Pennsylvania.

Cameron International Corporation provides flow equipment products, systems, and services to oil, gas, and process industries worldwide. Cameron International Corporation operates through three segments: Drilling & Production Systems, Valves & Measurement, and Compression Systems. The Drilling & Production Systems segment provides systems and equipment to control pressures, direct flows of oil and gas wells, and separate oil and gas from impurities. This segment offers surface and sub sea production systems, blowout preventers, drilling and production control systems, oil and gas separation equipment, gas conditioning units, membrane separation systems, water processing systems, block valves, gate valves, actuators, chokes, wellheads, drilling riser, and aftermarket parts and services, as well as elastomers. The Valves & Measurement segment provides valves and measurement systems to control, direct, and measure the flow of oil and gas. Cameron International markets its equipment through a network of sales and marketing employees, wholesalers, agents, and distributors in selected international locations. Cameron International Corporation was founded in 1994 and is headquartered in Houston, Texas.

Oil & Gas Development Company Limited (or OGDCL) is Pakistan's largest oil and gas exploration and production company. OGDCL's products include gas, crude oil, and LPG. Oil and Gas Development Company exploration activities are performed both on its own and through joint ventures, some of which the company operates; OGDCL explores both within and outside of Pakistan, as well as offshore. Oil and Gas Development Company accounts for 45% of Pakistan's oil reserves and 35% of the country's natural gas reserves. Total proved reserves in 2009 stood at 625 million barrels of oil equivalent. OGDCL was founded by Pakistan's government in 1961. In 2009 the government owned 85% of the company.

PSEG Power LLC, created in 1999, is the independent power production and energy marketing subsidiary of Public Service Enterprise Group (PSEG). The unit manages PSEG Nuclear LLC (operating the Salem and Hope Creek generating stations) and PSEG Fossil LLC (which includes gas, oil, coal, and natural gas) power plants. PSEG Power has installed capaity of about 13,700 MW. Its PSEG Energy Resources and Trade unit buys and sells wholesale power, natural gas, and other energy commodities throughout New England, Connecticut, Illinois, New Jersey, New York, Ohio, and Virginia.

Dawson Geophysical Company provides onshore seismic data acquisition services in the United States. Dawson Geophysical Company acquires and processes two dimensional (2D), three dimensional (3D), and multi-component seismic data for oil and gas companies and independent oil and gas operators, as well as for providers of multi-client data libraries. Dawson Geophysical Company 2-D method involves the collection of seismic data in a linear fashion and generates a single plane of subsurface seismic data. Its 3-D method produces a volume of seismic data, which produces precise images of the earth's subsurface. As of September 30, 2008, Dawson Geophysical Company operated 16 seismic data acquisition crews in the lower 48 states of the United States and a seismic data processing center. Dawson Geophysical Company was founded in 1952. Dawson Geophysical Company is headquartered in Midland, Texas and has additional offices in Houston, Denver, Oklahoma City, and Michigan.

Cabot Oil & Gas Corporation was founded in 1989 and is headquartered in Houston, Texas.Cabot Oil & Gas Corporation engages in the development, exploitation, and exploration of oil and gas properties in North America. Its principal areas of operation comprise the Appalachian Basin; the onshore Gulf Coast, including south and east Texas and north Louisiana; the Rocky Mountains; and the Anadarko Basin. Cabot Oil & Gas Corporation also operates in the deep gas basin of Western Canada. In addition, it transports, stores, gathers, and produces natural gas for resale. As of December 31, 2008, Cabot Oil & Gas Corporation had total proved reserves of 1,942 billion cubic feet of natural gas equivalents.

Superior Energy Services, Inc. provides specialized oilfield services and equipment to serve the production and drilling related needs of oil and gas companies. Superior Energy Services Inc. operates through three segments: Subsea and Well Enhancement, Drilling Products and Services, and Marine. The Subsea and Well Enhancement provides various services, including coiled tubing, electric line, pumping and stimulation, gas lift, well control, snubbing, recompletion, engineering and well evaluation, offshore oil and gas tank and vessel cleaning, decommissioning, plug and abandonment, and mechanical wireline services. Superior Energy Services Inc. provides mechanical wireline services in the Gulf of Mexico. This segment also manufactures and sells drilling rig instrumentation equipment. The Drilling Products and Services segment manufactures, sells, and rents equipment for use with offshore and onshore oil and gas well drilling, completion, production, and workover activities in Latin America, North America, the North Sea region, Continental Europe, the Middle East, Central Asia, West Africa, and the Asia Pacific region. Superior Energy Services Inc. drilling products and services comprise pressure control equipment, drill pipe and landing strings, connecting iron, handling tools, stabilizers, drill collars, torquing tools, and on-site accommodations. The Marine segment owns and operates a fleet of liftboats in the Gulf of Mexico and the Caribbean. As of December 31, 2009, Superior Energy Services Inc. operated a fleet of 26 rental liftboats. Superior Energy Services Inc. was founded in 1991 and is based in New Orleans, Louisiana.

Martin Midstream Partners moves petroleum products. The company gets most of its sales from the distribution of liquefied petroleum gases (LPGs). Martin Midstream buys the LPGs from natural gas processors and oil refiners and sells them to propane retailers and industrial customers. Martin Midstream also manufactures sulfur and sulfur-based fertilizer products and provides marine transportation and storage of liquid hydrocarbons. The company operates primarily in the Gulf Coast region of the US. Martin Resource Management controls a 35% stake in Martin Midstream and owns its general partner.

Dolphin was founded in 1965 under the name A/S Aker Drilling and was acquired by Fred.Olsen in 1976. Dolphin is one of the pioneers in the Norwegian oil industry. Since Dolphin A/S was established in 1965 Dolphin A/S has acquired a broad and deep experience in the operation of drilling units on the Norwegian Continental Shelf. Dolphin A/S, a subsidiary of Fred.Olsen Energy, provides snubbing, hydraulic workover, and offshore drilling services to oil and gas exploration and production customers operating in the North Sea and off the coasts of Brazil and Trinidad. Dolphin, together with sister company Dolphin Drilling operates a fleet of eight semi-submersible drilling rigs, one deepwater drill ship, and a semisubmersible accommodation unit. Dolphin A/S customers have included Shell, Phillips Petroleum UK, and Smedvig.

VAALCO Energy was founded in 1984 and is headquartered in Houston, Texas. VAALCO Energy, Inc., an independent energy company, engages in the acquisition, exploration, development, and production of crude oil and natural gas. VAALCO Energy, Inc. owns producing properties, as well as conducts exploration activities as an operator of consortiums internationally in Gabon and Angola, and as a non-operator in the British North Sea. VAALCO Energy, Inc. also has minor interests in the Texas Gulf Coast area and offshore Louisiana.

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