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Patterson-UTI Energy, Inc. is a provider of contract drilling business. It operates primarily in Texas, New Mexico, Oklahoma, Arkansas, Louisiana, Mississippi, Alabama, Colorado, Arizona, Utah, Wyoming, Montana, North Dakota, South Dakota, Pennsylvania,
EOG Resources (formerly Enron Oil and Gas) is a Fortune 500 company with its headquarters in the Heritage Plaza building in downtown Houston, Texas. The company is one of the largest independent oil and natural gas exploration and production companies in the United States with proven reserves in the United States, Canada, Trinidad and Tobago, the United Kingdom, and China. EOG Resources, Inc. is listed on the New York Stock Exchange and is traded under the ticker symbol "EOG".
Newpark Resources, Inc., publicly traded on the NYSE (symbol NR), is a uniquely positioned oilfield services company focused on two distinct business segments: drilling fluids and mats and integrated services. The company was founded in 1932, and its corporate headquarters is located in The Woodlands, TX. Newpark Drilling Fluids (NDF) is the largest business unit, having commenced operations in 1997. As the only remaining service company whose primary focus is drilling fluids, NDF has become the third largest drilling fluids company serving the North American market. Newpark Mats and Integrated Services (NMIS) provides temporary work sites and access roads to drilling sites, as well as site closure and remediation upon completion of operations. NMIS is the dominant player in mat rental and integrated site services, with the DURA-BASE™ composite mat system, which provides a safe, cost-effective surface for year-round all weather performance. Newpark Resources` significant status in these business segments and the company`s environmentally advanced contributions provide a bright outlook for its continued growth and success.
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.