HOISTING METHOD AND ASSEMBLY FOR ABANDONING AND/OR RECOVERING AN UNDERWATER PIPELINE FROM A LAYING VESSEL, AND LAYING VESSEL EQUIPPED WITH SUCH A HOISTING ASSEMBLY

摘要

A method of abandoning or recovering an underwater pipeline (2) from a laying vessel (1), the method including the steps of looping a first rope (10) about a pulley (22) connected to the free end of the pipeline (2); end- locking the first rope (10), on one side, to the laying vessel (1); and winding or unwinding the first rope (10), on the other side, by means of a first winch (8) located on the laying vessel (1) and having a first hoisting capacity.