Addax Petroleum Corporation specializes in exploring and producing oil and gas, focusing on regions in West Africa and the Middle East. Addax Petroleum, which has properties in Nigeria, Gabon, Cameroon, and the Kurdistan region of Iraq, produces about 137,000 barrels of crude oil a day. In 2008 Addax Petroleum reported proved and probable reserves of 536.7 million barrels of oil equivalent and held 4.4 million acres of exploration, development and production properties. That year the company was acquired by China's Sinopec for about $7.5 billion.

The Crusader Energy Group was, formerly known as Westside Energy, specializes in horizontal drilling techniques and explores and develops oil and gas properties in the US. Crusader Energy Group LLC concentrates its efforts on the prolific Barnett Shale, the Anadarko Basin, and the Bakken Shale formation in the Williston Basin. Long a dormant company, Crusader Energy Group LLC was reactivated in 2004 as Westside Energy with the intention of developing oil and gas properties as well as looking for acquisitions. In 2008, that company combined with Crusader Energy Group and took on that name. In early 2010 Anadarko Basin explorer Jones Energy acquired Crusader Energy.

Thai Oil Public Company Limited, Owner and operator of a highly complex refinery which integrated in related to petrochemical production that utilizes modern processing technologies to produce petroleum products predominantly for domestic distribution, Thaioil has expanded into energy-related industries of petrochemicals and lube base production, power generation, as well as marine and pipeline transportation systems for petroleum products and petrochemicals. Owner and operator of a highly complex refinery which integrated in related to petrochemical production that utilizes modern processing technologies to produce petroleum products predominantly for domestic distribution, Thaioil has expanded into energy-related industries of petrochemicals and lube base production, power generation, as well as marine and pipeline transportation systems for petroleum products and petrochemicals.

Lundin Petroleum AB was formed in 2001 as a result of the takeover of Lundin Oil AB by Canadian independent Talisman Energy. The oil and gas exploration and production company focuses on developing oil and gas assets in Cambodia, Congo, France, Indonesia, Ireland, Malaysia, the Netherlands, Norway, Russia, Tunisia, the UK, and Vietnam. In 2009 Lundin Petroleum reported proved and probable reserves of 217.5 million barrels of oil equivalent, the bulk of which was in the UK and Norwegian sectors of the North Sea. Oil accounts for more than 85% of the Lundin Petroleum's total reserves. The Lundin family owns 24% of the company.

Fugro helps the oil and gas, mining, and construction industries stay grounded. The geological engineering company operates three divisions. Fugro N.V. Survey unit offers geophysical surveys, inspection services, oceanographic mapping, aerial photography, and global positioning services. Fugro's Geotechnical division provides design and construction services, including pavement engineering, pipeline engineering, drilling, materials testing, structural monitoring, and foundation analysis and modeling, and primarily serves the oil and gas industry. Fugro N.V. Geosciences operations provide seismic and gravity surveys, reservoir services, and airborne mineral and petroleum exploration.

BOURBON is focusing its development on offshore oil and gas marine services and it is investing massively in innovative and high performance vessels to help its clients reduce their costs for the future, with the highest safety standards. BOURBON has cast off its sugar and retail and food distribution businesses to become a pure play in marine services. Bourbon's maritime activities include: Bourbon Offshore, which provides offshore oil and gas marine services; and its Bourbon Bulk cargo division, Setaf-Saget, which ships commodities such as coal, grain, and timber worldwide. BOURBON operates a fleet of some 266 crew boats and supply vessels that set sail from the West Coast of Africa and the North Sea, among other ports.

Sefton Resources explores for and produces oil and gas primarily in California and Kansas. Sefton Resources, Inc. core area of exploration and production is the East Ventura Basin in California, where Sefton Resources owns two oil fields (Tapia Canyon and Eureka Canyon). In addition, Sefton Resources, Inc. owns more than 40,000 acres in the Forest City Basin of Eastern Kansas, which has coalbed methane and conventional oil and gas deposits. Sefton Resources, Inc. has proved reserves of 7.6 million barrels of oil equivalent. Sefton Resources, Inc. operating subsidiaries are TEG Oil & Gas USA and TEG Oil & Gas MidContinent.

The company was founded in 1920 and is based in Tulsa, Oklahoma. Helmerich & Payne, Inc. engages in the contract drilling of oil and gas wells in the United States and internationally. Helmerich & Payne, Inc. provides drilling rigs, equipment, personnel, and camps on a contract basis to explore for and develop oil and gas from onshore areas and from fixed platforms, tension-leg platforms, and spars in offshore areas. Helmerich & Payne, Inc. conducts domestic land drilling primarily in Oklahoma, California, Texas, Wyoming, Colorado, Louisiana, Mississippi, Pennsylvania, Utah, Arkansas, New Mexico, and North Dakota; and offshore drilling in the Gulf of Mexico, offshore of California, Trinidad, and Equatorial Guinea. As of September 30, 2009, the company had 201 land drilling rigs in the United States; 9 offshore platform rigs; and international land rigs, including 1 in Venezuela, 6 in Colombia, 4 in Ecuador, 9 in Argentina, 1 in Tunisia, and 6 rigs in Mexico. In addition, Helmerich & Payne engages in the ownership, development, and operation of commercial real estate properties, as well as the research and development of rotary steerable technology.

Rock Energy Inc. is a junior oil and gas company currently producing more than 3,600 boe per day (60% oil) from two main core areas (Plains/Lloydminster and West Central/Deep Basin). The oil and gas exploration and production company owns heavy oil and natural gas properties in Western Canada, primarily in Alberta and Northeastern British Columbia (the Plains). During the last four years Rock has consistently generated solid performance in production/reserves growth. In 2006 Rock delivered top-quartile finding and development costs. Rock Energy Inc. has an inventory of more than 100 drilling locations (three to four years) which includes a variety of projects generating a full range of risk and reward plays (low risk development locations to high impact exploration projects). Rock has the opportunities and the financial capacity to deliver growth for its shareholders.

Hardy Oil and Gas is a hearty endorser of the booming oil and gas industry. The international oil and gas exploration and production company primarily focuses on India, with strategic positioning in the oil and gas basins on the east coast of India and off of the Saurashtra west coast, near the Bombay High field. Hardy Oil and Gas plc has also acquired development assets in the proven oil province of the Niger Delta of Nigeria. Hardy Oil and Gas (then known as Jehan Energy Ltd.) was founded by Sastry Karra (CEO) and Yogeshwar Sharma (COO) in 1997. Hardy Oil and Gas plc was renamed Hardy Oil and Gas in 2001 and became a public company in 2005.

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