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Amerada Hess Corporation Amerada Hess Corporation is a leading global independent energy company, engaged in the exploration and production of crude oil and natural gas, as well as in refining and in marketing refined petroleum products, natural gas, and electricity. Anadarko Delivers a competitive and sustainable rate of return to shareholders by developing, acquiring and exploring for oil and gas resources vital to the world's health and welfare. Baker Hughes Specialise in oilfield services, creating value for oil and gas producers by providing practical technology to find, develop, produce and manage petroleum reservoirs. BG Group Global energy supplier, focusing on exploration and production, liquefied natural gas, transmission and distribution and power generation. BP Specialise in the fields of exploration and production of crude oil and natural gas; refining, marketing, supply and transportation; and the manufacture and marketing of petrochemicals. Canadian Natural Resources Limited Oil and natural gas exploration, development and production company based in Calgary, Alberta. Centrica Supplier of three major consumer brands, British Gas, Dyno and OneTel. ConocoPhillips ConocoPhillips is an international, integrated energy company. It is the third largest integrated energy company in the United States, based on market capitalization, oil and gas proved reserves and production; and the largest refiner in the United States. Devon Energy Corporation Devon Energy Corporation is the largest U.S.-based independent oil and gas producer and one of the largest independent processors of natural gas and natural gas liquids in North America. El Paso El Paso Corporation provides natural gas and related energy products in a safe, efficient, dependable manner Eog Resources Largest independent (non-integrated) oil and gas companies in the United States with substantial proved reserves in the U.S., Canada and offshore Trinidad, and to a lesser extent, the United Kingdom North Sea. Enbridge World's longest crude oil and liquids pipeline system EnCana Corporation Largest independent natural gas producer in North America - daily produced gas sales averaged 2.6 billion cubic feet per day. Enel Specialise in the management of large infrastructures and in the supply of goods and services, applying skills and technological innovation to growth initiatives. Eni Eni is an international company operating in the oil and natural gas, electricity generation, engineering and construction sectors, and in the petrochemical business. Ensco International Global Offshore Oil and Gas Drilling Contractor. Exelon Electricity and gas company through out the United states. Exxon Mobil Formed by the combination of two high-calibre organizations, Exxon and Mobil, the company is an industry leader in almost every aspect of the energy and petrochemical business. Halliburton Halliburton is one of the world's largest providers of products and services to the oil and gas industries. Hong Kong and China Gas Co Ltd Core business comprises of production and distribution of gas, marketing of gas and appliances, and comprehensive after-sales services. Hydro We are a leading offshore producer of oil and gas, the world’s third-largest aluminium supplier and a leader in the development of renewable energy sources. Kerr-McGee Corporation Kerr-McGee Corporation is a global energy and inorganic chemical company based in Oklahoma City. We are a recognized leader in oil and natural gas exploration and production. Linde International technology group, that specialises in gas and engineering and material handling. Petro-Canada One of the largest integrated oil and gas companies in Canada. Repsol YPF Integrated international oil and gas company, based in Spain. RWE Group RWE offers energy and disposal from one source. Core business is electricity, gas, water, heating, disposal, plants nets, services, solid fuels and oil. Snam Rete Gas Snam Rete Gas is the company which manages the natural gas transportation service in Italy, through its nationwide gas pipeline network system which now extends of almost 30,120 kilometres. Statoil Statoil is an integrated oil and gas company with substantial international activities. Talisman Energy Inc Upstream oil and gas company that is a successful international operator, as well as a major North American gas producer. TEPCO TEPCO play an important role in Japanese society by generating and supplying power. Transcanada North American energy company, focusing on natural gas transmission and power services. .

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