A subsea pipeline coated with a thermally insulating coating has a radially outer surface shaped to define external hold-back formations. In a J-lay operation, the weight load of a pipeline catenary is held back using a complementary bushing or clamp of an installation vessel engaged with the hold-back formations. The weight load is transferred from the catenary to the bushing or clamp by shear forces acting through the coating. The coating extends continuously along the pipe and is interposed between the hold-back formations and the underlying pipe. The hold-back formations may be integral with the coating.
Holding Back Elongate Elements During Subsea Operations
2018-12-13
Patent
Electronic Resource
English
METHOD OF HANGING-OFF FLEXIBLE ELONGATE ELEMENTS DURING SUBSEA OPERATIONS AND HANG-OFF INSERT
European Patent Office | 2020
|Transportation and Installation of Elongate Subsea Elements
European Patent Office | 2017
|