Marine pipelaying system and method for lowering and/ or raising an offshore pipeline and including one or more accessories thereto

A technology for submarine pipelines and accessories, applied in pipeline laying and maintenance, pipes/pipe joints/fittings, pipe laying ships, etc., which can solve problems such as unsatisfactory known technologies

Active Publication Date: 2017-08-01
ITREC BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This known technique for including accessories in the pipeline when laying a subsea pipeline or at the end of the pipeline is not satisfactory

Method used

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  • Marine pipelaying system and method for lowering and/ or raising an offshore pipeline and including one or more accessories thereto
  • Marine pipelaying system and method for lowering and/ or raising an offshore pipeline and including one or more accessories thereto
  • Marine pipelaying system and method for lowering and/ or raising an offshore pipeline and including one or more accessories thereto

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Embodiment Construction

[0135] exist figure 1 A possible embodiment of a marine pipeline laying system 1 according to the invention is shown in FIG. 3 .

[0136] exist figure 1 As seen in FIG. 1 , a marine pipeline laying system 1 for installing a subsea pipeline (not shown) including one or more accessories is installed on the deck 2 of a vessel 3 . In the drawing, a PLET (Pipe End Terminal Facility) 30 is shown. The vessel is preferably a dynamically positioned vessel capable of moving during pipelaying operations. The vessel moves forward while laying the pipeline on the sea floor. The vessel may be a monohull, but it is also conceivable that the vessel is semi-submersible or has a hull shape suitable for arctic conditions.

[0137] The marine pipeline laying system 1 comprises a pipeline water entry device 10 for launching a pipeline (and other objects to be explained below) in a working line 11 into the sea from a ship 3 along the seabed.

[0138] The marine pipeline laying system of the pr...

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Abstract

The present invention relates to a marine pipelaying system (1) and method for lowering and/ or raising an offshore pipeline and including one or more accessories (30) thereto, the system (1) comprising a pipeline launch device (10), a pipeline clamp (6a, 6b), an accessory connecting device and a controlled load hoisting device (19). An accessory handling device (20) is provided comprising an accessory transport track (21) and a cart (23) adapted to engage and support one of the one or more accessories, such that the accessory handling device (20) is adapted to engage said accessory at the engagement position, position said accessory in the pipeline connecting position in the firing line (11) above the pipeline clamp 6a, 6b), wherein the accessory can be connected to the pipeline and support and allow displacement of the accessory between the engagement position and the pipeline connection position.

Description

technical field [0001] The present invention relates to a marine pipeline laying system and method for lowering and / or raising a subsea pipeline and one or more accessories comprised by the subsea pipeline. Background technique [0002] In most subsea pipelines to be laid it is necessary to install accessories, also known as assemblies on the ends of the pipeline and / or at one or more intermediate positions along the pipeline. These attachments are often very large and heavy, and are generally designed to be welded to the pipe. Examples of such accessories are: primary assemblies, pipe end termination facilities (PLETs), branch pieces, inline SLED assemblies, inline manifolds, pipe valves, tee assemblies with support structures and anti-settling plates. [0003] Such pipe fittings should normally be welded in line with the pipe. The attachment typically has pipe connection parts at its opposite ends to connect subsea pipes to these pipe connection parts. However, it is al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/20F16L1/19B63B35/03
CPCB63B35/03F16L1/19F16L1/202F16L1/207F16L1/16F16L1/166F16L1/205
Inventor J·鲁登伯格T·W·A·韦赫梅伊吉
Owner ITREC BV
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