AXIAL LOAD TRANSFER CHARACTERISTICS OF SCR PIPE-IN-PIPE VIBRATION SYSTEM WITH DIFFERENT DIAMETER RATIO

摘要

Coiled tubing technology can shorten the operating time of offshore oil and gas drilling or repair well, but due to the small stiffness of the coiled tubing, it is easy to cause the buckling in the process of entering the Steel Catenary Riser (SCR). So the research of its axial load transfer characteristics in riser is necessary. In this paper, the external excitation loads of current and ocean waves are analyzed. By building an indoor experiment platform with similarity theory, the influence of axial load transfer characteristics with the same external excitation is studied on different diameter ratio of SCR pipe-in-pipe vibration system. Through the above research, we can reduce the accidents of the riser and coiled tubing, and provide theoretical support and guarantee to the actual operation.