摘要:
An offshore S-lay pipelaying vessel (300) for laying a pipeline on the seabed, said vessel comprising an elongated stinger (310) being adapted to support the pipeline to be laid from the vessel, wherein the stinger (310) comprises a stinger frame which is composed of at least two rigid stinger frame sections (311, 312): a hull section (311) and a distal section (312), which are connected to each other via at least one connection assembly (340) suitable to fixate the stinger frame sections in at least two different orientations, the connection assembly comprising at least two overlapping connection elements (345, 346), which are each pivotably connected to the respective stinger frame sections and pivotably connected to each other, and which may be fixed to each other in at least two different orientations, such that the orientation of the stinger frame sections can be varied without disconnection of the connection elements.
摘要:
An offshore S-lay pipelaying vessel (300) for laying a pipeline on the seabed, said vessel comprising an elongated stinger (310) being adapted to support the pipeline to be laid from the vessel, wherein the stinger (310) comprises a stinger frame which is composed of at least two rigid stinger frame sections (311, 312): a hull section (311) and a distal section (312), which are connected to each other via at least one connection assembly (340) suitable to fixate the stinger frame sections in at least two different orientations, the connection assembly comprising at least two overlapping connection elements (345, 346), which are each pivotably connected to the respective stinger frame sections and pivotably connected to each other, and which may be fixed to each other in at least two different orientations, such that the orientation of the stinger frame sections can be varied without disconnection of the connection elements.
摘要:
A method for installing a pipeline on the seabed from a marine pipelaying vessel, comprising initiation, pipelaying, and abandonment of the pipeline. An embodiment of the abandonment of the pipeline comprises: • - halting pipelaying and engaging a hang-off clamp (30) with the pipeline at a position below one or more tensioners, • - transferring the weight onto the hang-off clamp and holding the seagoing pipeline in the firing line, • - severing the pipeline, • - connecting the initiation cable (41) to the lower end of the pipeline held by the one or more tensioners, • - transferring pipeline tension onto the initiation cable, • - releasing the one or more tensioners, so that a section of the pipeline is held in the firing line between the pipeline diverter (17) and the initiation cable, • - vacating the firing line by at least displacing both the pipeline diverter and the initiation cable sheave and thereby displacing said section of the pipeline from the firing line, • - arranging the A&R cable (51) in the firing line, • - connecting the A&R cable to the upper end of the seagoing pipeline held in the firing line, • - releasing the hang-off clamp, • - operating the A&R winch and thereby lowering the pipeline onto the seabed.
摘要:
An electronic control system for controlling a variable- configuration lay ramp of a pipeline laying vessel, to lay a pipeline on the bed of a body of water, is configured to : acquire data including data related to the configuration of the lay ramp (5), data related to the laying vessel (1), and data related to the forces transmitted by the lay ramp (5) and the laying vessel to the pipeline (2); generate a plurality of step sequences to change the configuration of the lay ramp (5) from a first to a second work configuration; and select a best step sequence as a function of the plurality of step sequences and the acquired data, so as to minimize the stress induced in the pipeline (2) at each intermediate configuration between the first and second work configuration.
摘要:
A method of laying conduit at sea from a reel vessel includes the steps of laying conduit, for example pipeline or umbilical, from a first reel which rotates about a first substantially vertical axis. Conduit is laid from a second reel of conduit rotating about a second substantially vertical axis spaced apart from the first axis. A portion of the route travelled by the conduit during the step of laying conduit from the first reel of conduit is substantially the same as a portion of the route travelled by the conduit during the step of laying conduit from the second reel of conduit, for example, the conduit from the second reel may pass around a part of the periphery of the first reel and then follow substantially the same path as previously travelled by the conduit laid from the first reel.
摘要:
A vessel for laying a pipeline includes a plurality of workstations (12) disposed along a pipelaying path that includes an upstream portion away from a first end of the vessel and a plurality of ramps (21, 22) in the region of the first end of the vessel. The plurality of ramps (21, 22) includes a first ramp (21) which is disposed along the pipelaying path, whose inclination is adjustable and which has a first upstream end and a second downstream end, and a second ramp (22) which is disposed along the pipelaying path downstream of the first ramp (21), whose inclination is adjustable and which has a first upstream end and a second downstream end. The downstream end of the first ramp is positioned inboard of the first end of the vessel and above the bottom of the vessel and the upstream end of the second ramp is positioned inboard of the first end of the vessel and above the bottom of the vessel. An external ramp assembly (66) is provided, including ramps (68) and (69) that can be pivoted relative to one another and locked in a selected position by a locking arrangement (88).
摘要:
A vessel for laying a pipeline includes a plurality of workstations (12) disposed along a pipelaying path that includes an upstream portion away from a first end of the vessel and a plurality of ramps (21, 22) in the region of the first end of the vessel. The plurality of ramps (21, 22) includes a first ramp (21) which is disposed along the pipelaying path, whose inclination is adjustable and which has a first upstream end and a second downstream end, and a second ramp (22) which is disposed along the pipelaying path downstream of the first ramp (21), whose inclination is adjustable and which has a first upstream end and a second downstream end. The downstream end of the first ramp is positioned inboard of the first end of the vessel and above the bottom of the vessel and the upstream end of the second ramp is positioned inboard of the first end of the vessel and above the bottom of the vessel. An external ramp assembly (66) is provided, including ramps (68) and (69) that can be pivoted relative to one another and locked in a selected position by a locking arrangement (88).
摘要:
A pipe-laying vessel has a bow, a stern and a weather deck therebetween, with a moonpool passing through the weather deck. The vessel includes an S-lay pipe deployment facility located below the weather deck, having a main firing line extending along a centerline of the vessel and a pipe assembly factory for assembling single lengths of pipe to form pipe assemblies and introduce them into the firing line for deployment from the vessel. The vessel further includes a J-lay pipe deployment facility for deploying pipe through the moonpool, the J-lay pipe deployment facility including a tower located above the moon pool and pipe handling equipment for delivering pipe assemblies from the firing line to the tower. The moonpool is located to one side of the firing line. By virtue of this configuration a relatively compact structure can be achieved whereby minimal length and width dimensions for the vessel are achievable.
摘要:
The invention provides improvements to the tensioner pads which engage with the surface of elongate articles in tensioners such as used on offshore pipelaying and construction vessels to deploy products such as pipelines, cables and umbilicals. Tensioner pad assemblies according to the invention may include; two or more tensioner pads and present a first tensioner pad to the product when in a first configuration and present a second tensioner pad to the product when in a second configuration; a split tensioner pad with a means for controlling the separation between the portions of the pad; and combinations thereof. The invention allows a tensioner to accommodate products of different shapes, sizes and materials without having to swap tensioner pad assemblies.