Company Profitability and Market Share

www.cosl.com.cn COSL A Unique Integrated Oilfield Service Provider Drilling Revenue Breakdown* 44% 25% Well services 15% 16% Integrated well services 12 jack-ups + 3 semi-submersibles +2 onshore drilling rigs+4 module rigs Marine Support Profit Breakdown* 73 working vessels+4 oil tankers+ 5 chemical carriers * For the year ended 31 Dec, 2007 53% 14% 19% 4 14% COSL Geophysical 719 8 seismic vessels + 4 survey vessels

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