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Abstract:
Crown mounted heave compensator(CMC) is the key equipment of offshore drilling platform when operating in deep sea. However, China has not yet mastered the core technology, letting alone mature products. Assessing crown-mounted heave compensator of international manufacturers is the foundation work to achieve its localization, while conventional calculation method is difficult to assess the pros and cons of different designs. Therefore, fuzzy comprehensive evaluation method (FCEM) is used to develop the evaluation index system which includes 3 factors and 11 sub-indices in this paper, and the AHP-Delphi method is used to obtain the weight values of indices. The FCEM is applied to 7 typical crown mounted heave compensators with different principle and design. The results show that ranks for SAHC are all "excellent" but for PHC are all "good", which indicates that priority should be given to SAHC. In SAHC, the scheme takes one active and two passive cylinders is the best. Vertically arranged cylinders are better than the inclined ones. The study cannot only verify the feasibility of fuzzy comprehensive evaluation method in the evaluation of equipment, but also can provide a scientific basis for China's self-designed device.
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