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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.
Klabzuba Oil Gas is a Havre, MT-based company in the Energy and Utilities sector.
Patterson Drilling Co is a Lumberton, MS-based company in the Energy and Utilities sector.
PPI Technology Services, Inc is one of the leading companies in the Energy and Utilities sector.