(EnergyAsia, September 24 2010, Friday) — China’s first deepwater semi-submersible drilling platform, the COSLPioneer, recently completed its sea trial, said the company contracted to build it. Yantai CIMC Raffles Offshore Ltd, which constructed the platform for China Oilfield Services Limited (COSL), said it conducted an integrated testing of the platform’s hull, mechanical, electrical and other…