• Cliffs Drilling Co
• Pride International Inc
• Enex Oil & Gas Income Program III Series 8 LP
• Enex Oil & Gas Income Program III Series 7 LP
• Enex 88 89 Income & Retirement Fund Series 1 L P
• Enex Oil & Gas Income Program IV Series 1 LP
• Enex Oil & Gas Income Program IV Series 2 L P
• Enex Oil & Gas Income Program IV Series 3 L P
• American Environmental Energy, Inc.
• Enex Oil & Gas Income Program IV Series 4 L P
• Marine Drilling Companies Inc
• Enex Oil & Gas Income Program IV Series 6 LP
• Chiles Offshore Corp
• Enex Oil & Gas Income Program IV Series 7 LP
• Arethusa Off Shore Limited
• Enex Oil & Gas Income Program V Series 1 L P
• Southwest Developmental Drilling Fund 91-A LP
• Southwest Developmental Drilling Fund 92-A LP
• Enex Oil & Gas Income Program V Series 2 LP
• Crown Energy Corp
• Enex Oil & Gas Income Program V Series 3 L P
• Pdc 1992-C Limited Partnership
• Belden & Blake Corp
• Enex Oil & Gas Income Program V Series 4 LP
• Walking Stick Oil & Gas Corp
• Enex Oil & Gas Income Program VI Series I L P
• Pdc 1991-D Ltd Partnership
• Patterson-UTI Energy Inc.
• Enex Oil & Gas Income Program V Series 5 L P
• Kelley Partners 1992 Development Drilling Program
• Falcon Drilling Co Inc
• Geoglobal Resources Inc.
• Lasmo PLC
• Dual Holding Co
• Transocean Asa
• Kelley Partners 1994 Development Drilling Program
• Pdc 1993-E Limited Partnership
• Energy Search Inc
• Wolverine Energy 1997-1998 Development Program
• Diamond Offshore Drilling Inc.
• Chesapeake Operating LLC
• Lindsay Oil Field Supply Inc
• Sander Trucking Co Inc
• Whitmire Dozer Service Inc
• Chesapeake Exploration L P
• Precision Drilling Corporation
• Blue Ridge Energy Fund 1996/1997
• Smedvig Asa
• Erica
• Eastern 1996D Limited Partnership

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