marine pipe installation system for laying an offshore pipe and / or installing an underwater riser, and, methods for installing an accessory over a pipe, transferring a pipe and lowering a pipe

摘要

1/1 overview “marine piping installation system for laying offshore piping and / or installing an underwater riser, and methods for installing a pipeline fitting , for transferring a pipe and for lowering a pipe ”the present invention relates to a marine pipe installation system for laying a pipe off shore and / or install an underwater riser. the system comprises: a pipe launch tower (10), a pipe guide (16) provided at an elevated position to guide said pipe into the path launching pipe along said tower, one or more turnbuckles (18), a abandonment and recovery system (a & r) (30), comprising at least one a & r cable and winch of a & r associated and a pulley arrangement with one or more pulleys supported by the pipe launching tower in a higher position thereof. In addition, an auxiliary trolley (38, 50) is provided which is adapted to support the weight of the launched pipe and which is movable along a rail in the launching path. when one or more tensioner frames are in the non-retractable position, from a position above the uppermost tensioner to a position under the lower tensioner, the rail being supported by the pipe launch tower.