| 摘要 |
A method of abandoning a pipeline (2) being laid by a vessel (1) having an A/R (abandonment and recovery) system, wherein a sealine (2, 11, 13) is initially held by a pipe laying and tensioning arrangement. The method includes a step of reducing the tension at sea level of the sealine (2, 11, 13), by connecting one or more light buoyant elongate members (13) to the end of the pipeline (2). The elongate members (13) are then lowered into the sea, using a line (16) from a winch on the vessel (1). At least one elongate member (13) is connected to the pipeline (2) through a connection (12) which allows pivoting of the elongate member (13) so that the end of the elongate member (13) at the end of the pipeline (2) projects upwardly from the seabed (3). The connection of the winch line (16) to the sealine (2, 11, 13) may be cut off by remote actuation of a locking mechanism.
|
