• Grey Wolf Drilling Co
• Grey Wolf International, Inc.
• DI Energy, Inc.
• Globalsantafe Corp
• Pdc 1997-A Ltd Partnership
• Eastern 1997D Limited Partnership
• Ward Lake Drilling Inc
• Target Oilfield Pipe & Supply Co
• Canton Oil & Gas Co
• R&B Falcon Corp
• Pdc 2000 Drilling Program
• Parker Drilling Co of Oklahoma Inc
• Parker Technology Inc
• Parker Drilling Co North America Inc
• Parker Drilling Offshore USA LLC
• Quail Tools LP
• Parker Technology LLC
• Northern Offshore Ltd
• Northern Offshore Shipowning SA
• Chesapeake Energy Louisiana LLC
• Chesapeake Louisiana LP
• Chesapeake Canada Corp
• Chesapeake Gothic Corp
• Chesapeake Acquisition LLC
• Chesapeake Mid Continent Corp
• Ames Co LLC
• Chesapeake Acquisitions Ltd
• Terraco Energy Corp
• Torrey Charles P Jr
• Remine Robert L
• Cooper Richard S
• Pdc 1998-B Ltd Partnership
• Transocean Inc
• Growtex Inc
• Rbf Finance Co
• John D. Oil & Gas Co
• Newcastle Energy Corp
• Hinto Energy, Inc
• Pdc 1999-B Ltd Partnership
• Pdc 1999-C Ltd Partnership
• CO & PA 1999D Limited Partnership
• Pdc 1999-A Ltd Partnership
• United States Crude International Inc
• Fuels Inc
• Pdc 2000 a Ltd
• Colorado 2000B Limited Partnership
• Colorado 2000C Limited Partnership
• Colorado 2000D Limited Partnership
• Teton Energy Corp
• Union Drilling Inc

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