• Amfels Shipyard

• Atwood Oceanics, Inc.

• Beacon Maritime

• Blackford Dolphin PTE, LTD.

• DCOR, LLC

• ENSCO

• Gulf Copper Shipyard

• Helmerich & Payne, Inc.

• Hilcorp Alaska

• KCA Deutag

• Maersk Drilling Venezuela, S.A.

• National Oilwell Varco

• Plains Exploration & Production Company

• R.L. Eldridge Construction, Inc.

• Scorpion Offshore

• Seadrill

• TETRA Technologies