Gifts from the 20th century-Good lessons from drilling troubles. A practical approach to risk management in offshore operation.

Risks of Offshore Operations are more various and complicated than onshore drilling operation due to underwater well bore, meteorological environment and distant location from shoreside. Therefore, when considering the risk management the industrial total safety management system is required. It is important for all companies to extract the element of the risk and take remedial actions to reduce the risks and/or prospect the result. Hereinafter several cases are presented, which were caused by particular offshore operations and rather could not be prospected, and element of those risks are studied.