Drilling Agreement

Drilling Services Agreement - Apollo Drilling Co. and Mex Tex Operating Co. (Nov 10, 2006)
Master Drilling Agreement - Vector Energy West LLP and Sun Drilling LLP (May 6, 2005)
Master Drilling Agreement - Kozhan LLP and Sun Drilling LLP (May 5, 2005)
Drilling Agreement - KoZhaN LLP and Precaspiburneft-Kazakhstan LLP (Aug 16, 2004)
Contract for Exploration and Production of Hydrocarbons (Karatal) - Ministry of Energy and Mineral Resources and KoZhaN LLP (Feb 17, 2003)
Contract for Exploration and Production of Hydrocarbons (Dauletaly) - Ministry of Energy and Mineral Resources - KoZhaN LLP (Feb 17, 2003)
Contract for Exploration and Production of Hydrocarbons (Morskoye) - Ministry of Energy and Mineral Resources and KoZhaN Ltd. (Feb 17, 2003)
Contract on Prospecting of Hydrocarbon Materials (Atyrau) - Ministry of Energy and Mineral Resources of the Republic of Kazakhstan and Vector Energy West LLP (Dec 28, 2002)
Contract on Prospecting and Production of Hydrocarbon Material (Liman-2) - Ministry of Energy and Mineral Resources of the Republic of Kazakhstan and Vector Energy West LLP (Dec 28, 2002)
Drill Pipe Rental Agreement - Chiles Offshore Inc. and Hercules Offshore Corp. (Feb 25, 2002)
Drilling Contract for Rig 223 - Harken de Colombia Ltd. and Parker Drilling Co. International Ltd. (Jul 22, 1997)
Drilling Contract for Marlin Rig 8 - Harken de Colombia Ltd. and Marlin Colombia Drilling Co. Inc. (May 15, 1997)
Master Drilling Agreement - Bayard Drilling Technologies Inc. and Chesapeake Energy Corp. (Dec 10, 1996)
Drilling Bid Proposal and Daywork Drilling Contract - Bayard Drilling Technologies Inc.