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The largest and most diverse offshore oilfield services facilities in Asia
COSL operated and managed 19 seismic and engineering survey vessels, 62 drilling rigs，240 oilfield services vessels of various kinds，and it owns advanced oilfield technical service equipment such as Haijing, Haimai, Xuanji, Xuanyue, Haihong, etc., which are independently developed for geophysical exploration, logging, mud, directional drilling, cementing and workover services.
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Always Do Better
Adhering to the corporate spirit "Always do better" and upholding the core value of win-win with customers, employees, partners and shareholders, COSL strives to contribute its efforts for economic development, environmental protection, social progress and better human life on the way to achieve the international first-class oilfield services company.
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Respect the nature, care for the environment
COSL adheres to the comprehensive sustainable development concept of people-oriented, social harmonious and eco-friendly. With the highest industry standards, we always pursuit excellent QHSE performance and put the green and low carbon into each links of operations ,to pursuit the harmonious development of enterprises with people, society and the nature.
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Services & Products
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Driling Services
Well Services Geophysical &
Surveying Services
Marine Support Vessels Drilling Directional Drilling Geophysics Marine Support Vessels Liftboats & Accommodation Rigs Logging Geotechnical Surveying Drilling & Completion Fluids Cementing Workover Production and Optimization Well Completion Integrated Services Unconventional Resources Customer Appreciation Business World-wide
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