Taking a retired FPSO's flexible riser mid-water buoy removal operation in an oilfield as the research target,the study of mid-water buoy removal scheme is carried out,static and coupled dynamic lifting analysis is conducted to inspect the ability of MPV's crane capacity.Structure strength analysis and evaluation of mid-water buoy during the lifting process is performed and advice is given.The analysis results indicate that the ability of MPV's crane capacity meets the requirements for dismantling and hoisting of the mid-water buoy,and the structural safety of the mid-water buoy meets the requirements as well.Analysis methods and processes can be used as reference for similar projects.
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