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ExxonMobil is a multinational oil and gas corporation engaged in the exploration, production, transportation, and sale of crude oil and natural gas, as well as the manufacture and sale of petroleum products and petrochemicals.
Global Oilfield Surveys Inc. is a Calgary, AB-based company in the Energy and Utilities sector.
BTI is a Houston, TX-based company in the Energy and Utilities sector.
NOV Inc. is an American multinational corporation based in Houston, Texas.