COSL Drilling Europe AS is a Norwegian offshore drilling contractor headquartered in Stavanger. Established in 2005, it specializes in providing safe, efficient, and low-emission semi-submersible drilling services, primarily in the North Sea and harsh environments. The company operates modern rigs such as the COSL Prospector, capable of drilling in water depths up to 1,500 meters and to depths of 7,500 meters.
A subsidiary of China Oilfield Services Limited (COSL), it focuses on energy transition goals, including substantial reductions in CO2 and NOx emissions through advanced energy control systems. COSL Drilling Europe holds certifications in ISO 9001, 14001, 27001, 45001, and 50001, emphasizing quality, environmental, and safety management. It recently drilled for Equinor in the Barents Sea's Polynya Tubåen prospect.
Also known as COSL Drilling Europe and 中海油田服务股份有限公司.
Reviewed joint drilling and tech projects, the Zhylyoi exploration (400 lin. km 2D reprocessing; 400 km2 3D seismic due by end‑2026) and 50/50 financing.
New Polynya Tubåen discovery (7220/7-5)—prelim 14–24 million boe; follows June Drivis Tubåen find (13–20m). Plans: 1–2 exploration wells/yr; Isflak development under construction to tie in two wells.
