摘要:
A pipe-laying vessel includes an upwardly extending tower (14) assembly defining a path down which the pipe passes as a pipeline (40) is being laid by the vessel, and a lower guide arrangement for guiding the pipeline after it has passed down the tower, the lower guide arrangement (61) including a plurality of sets of guide rollers spaced apart along the path of the pipeline and defining the lateral limits of the path, the guide rollers being located such that they allow some bending of the pipeline as it passes through the lower guide arrangement.
摘要:
A pipe-laying vessel 10 for S-laying a pipeline 30 is provided, the vessel defining a pipe-laying path 20 extending along the vessel, the vessel comprising one or more track tensioners 200a, 200b, 200c disposed along the pipe-laying path, and a travelling clamp assembly 300, comprising a clamp 340 mounted for movement along a length of the pipe-laying path. The vessel may also comprise a fixed clamp assembly 100 located on the pipe-laying path for clamping the pipeline in a fixed position on the pipe-laying path. At least one of the clamp assemblies may comprise a load bearing structure 120, 320 and a clamp 130, 140, 340 wherein a downstream- facing portion of the clamp is in an abutting relationship with an upstream- facing portion of the load bearing structure such that a downstream force exerted, in use, by the pipeline on the clamp is transmitted to the load bearing structure.
摘要:
A lay ramp for an underwater-pipeline laying vessel has an inside ramp (9) hinged to the laying vessel (1); an outside ramp (10) hinged to the inside ramp (9); and an actuating device (11) having a first actuating assembly for rotating the inside ramp (9) with respect to the laying vessel (1), and a second actuating assembly (13) secured to the outside ramp (10) and to the first actuating assembly (12) to rotate the outside ramp (10) with respect to the inside ramp (9).
摘要:
A pipe-laying vessel comprises: means (2) for propelling the vessel during pipe-laying; means for assembling sections of pipe generally horizontally on the vessel to form longer lengths; a tower (14) at the bow of the vessel, with respect to an intended direction of movement, pivotally mounted so that it can be angled forwards towards the top; means (29) for raising a length of pipe fromthe deck to a position aligned with the tower; means (21, 23) for joining such a length of pipe to a pipeline being laid; tensioners (20) arranged to grip such a pipeline and to lower it into the water while maintaining a desired tension in the pipeline; one or more clamps (18) arranged to grip the pipeline below the tensioners; and a lower ramp (17) provided with rollers and arranged to guide the pipeline as it leaves the vessel.
摘要:
A pipe-laying vessel includes an upwardly extending tower (14) assembly defining a path down which the pipe passes as a pipeline (40) is being laid by the vessel, and a lower guide arrangement for guiding the pipeline after it has passed down the tower, the lower guide arrangement (61) including a plurality of sets of guide rollers spaced apart along the path of the pipeline and defining the lateral limits of the path, the guide rollers being located such that they allow some bending of the pipeline as it passes through the lower guide arrangement.
摘要:
A guide device (35), for supporting an underwater pipeline (2) along a feed path (Pl) as it is being laid, is fitted to a laying ramp (6), and has a cradle (36) housing the pipeline (2); a frame (37) fixed to the laying ramp (6); and a spacer mechanism (38) located between the frame (37) and the cradle (36) to selectively adjust the distance between the cradle (36) and the frame (37), and having a shock absorber (66) connected to the cradle (36).