• Weatherford International LLC
• Newpark Resources, Inc.
• Varco International Inc
• Dreco Energy Services Ltd
• Teledyne Bolt, Inc.
• Smith International Inc
• Forster Drilling Corp
• Erc Industries Inc
• Baker Hughes Holdings LLC
• Numar Corp
• Boots & Coots, Inc.
• T-3 Energy Services Inc
• Mag Well Inc
• Cameron International Corp
• Imperial Petroleum Recovery Corp
• NOV Inc
• Tesco Corp
• Gulfmark Offshore Inc
• Friede Goldman Halter Inc
• Dril-Quip, Inc.
• Bayard Drilling Technologies Inc
• Iri International Corp
• United Oilfield Services Inc
• W-H Energy Services Inc
• Chiles Offshore
• Ocean Rig Asa
• Ocean Rig Norway As
• Ocean Rig 1 As
• Ocean Rig 2 As
• Bayard Drilling LP
• Bayard Drilling LLC
• Trend Drilling Co
• Crc Evans International Inc
• Coil Tubing Technology, Inc.
• Big Cat Energy Corp
• Freestone Resources Inc
• Grant Prideco Inc
• QS Energy Inc
• Koil Energy Solutions Inc
• Hydril Co
• Oil States International, Inc.
• Fmc Technologies Inc
• Aurelia Energy N V
• Profire Energy Inc
• Beluga Composites Corp
• Oil States Energy Services Holding, Inc.
• Stewart & Stevenson LLC
• Columbus Acquisition Corp
• Refinery Science Corp
• Forum Energy Technologies Inc

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