公开(公告)号：WO2021219998A1

公开(公告)日：2021-11-04

申请号：PCT/GB2021/051026

申请日：2021-04-28

Applicant: SUBSEA 7 LIMITED

Inventor： JOENSEN, Arnbjorn ,  OGBODO, Nwabueze Samuel

IPC: F16L1/16 ,  B63B21/62 ,  B63B21/56 ,  F16L1/165

Abstract: A structure such as a pipeline bundle is pulled into or through shallow water, for example when launching the structure, by applying a tensile pulling force to the structure through rigging that extends to the structure from a winch of a first vessel. The pulling force is at least partially reacted through a pennant line that extends from the first vessel to a second vessel and that hangs between the first and second vessels to engage the seabed soil frictionally. The vessels may also self-propel to contribute their thrust to the pulling force. The pennant line includes a clump weight such as a bundle of chains that can be repositioned easily for additional pulls by being lifted between the vessels before being lowered to the seabed at a new location.