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halliburton is one of the world's largest providers of products and services for the ever-evolving needs of the energy industry.

chevron works to meet the world's growing demand for energy by exploring for oil and natural gas; refining and marketing gasoline; producing chemicals and more.

nov provides oilfield equipment, technologies, and expertise that answer the challenges of oil and gas customers worldwide with safety, efficiency, and reliability.

exxonmobil scientists are pioneering new research & technologies to reduce emissions. learn how we are responsibly meeting the world's energy needs.

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world oil provides news, oil prices, data, statistics, shale reports and upstream industry trends relating to the exploration, drilling, completion and production of oil and gas, both onshore and offshore.