Company Profitability and Market Share

Dominant offshore China www.cosl.com.cn COSL Offshore China Beijing 0 100 200 300 km Tianjin Market Share in Offshore China Markets Korea Bohai Bay 90% ChevronTexaco ConocoPhillips East China Shanghai Sea 60% China Husky Energy ngzho Hong SEALINGTON devon ENERGY CORPORATION 30% Absolute Dominance >60% >70% >80% Kong ConocoPhillips 0% Eastern South Drilling China Sea Well Services MS&T Geophysical Western South China devon ENERGY CORPORATION Philippines For the period ended 1Q2008 ■ COSL Others Sea All-round IPM offshore oilfield services provider with leading position in offshore China markets 5

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