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Petróleo Brasileiro S.A. é uma empresa de capital aberto, cujo acionista majoritário é o Governo do Brasil, sendo, portanto, uma empresa estatal de economia mista.
American Exploration Company is a Houston, TX-based company in the Energy and Utilities sector.
Republic Energy is a Dallas, TX-based company in the Energy and Utilities sector.
Mid Continent Well Logging is a company that provides mud logging and formation evaluation services to the oil and gas industry.