Method of abandoning an underwater pipeline on the bed of a body of water

摘要

A method of abandoning an underwater pipeline (2) on the bed (3) of a body of water (4) from a laying vessel (1) includes the steps of lowering the free end of the pipeline (2) into the body of water (4) and onto the bed (3) of the body of water (4) using a first and second rope (12, 13), both connected to the free end of the pipeline (2) and extending from the laying vessel (1) to the free end of the pipeline (2); disconnecting the first rope (12) from the free end of the pipeline (2), once the free end of the pipeline (2) is laid on the bed (3) of the body of water (4); and rewinding the first rope (12) onto the laying vessel (1), while the second rope (13) is still connected to the free end of the pipeline (2).