Sea pipe distribution system and method of off-land pipeline with one or more fittings

A technology for pipelines and accessories, applied in the field of underwater layout of offshore pipelines, can solve problems such as unsatisfactory technology

Active Publication Date: 2008-04-02
ITREC BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] These known techniques of inserting an accessory into or at one end of a pipeline while laying out an offshore pipeline are unsatisfactory

Method used

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  • Sea pipe distribution system and method of off-land pipeline with one or more fittings
  • Sea pipe distribution system and method of off-land pipeline with one or more fittings
  • Sea pipe distribution system and method of off-land pipeline with one or more fittings

Examples

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Embodiment Construction

[0071] Figures 1a-g schematically illustrate a preferred offshore piping method for installing an offshore pipeline with accessories according to the present invention.

[0072] In these figures, 1a-g show the stern of the floating vessel 2 . The vessel 2 is provided with a tower 6 pivotally connected to the vessel 2 by means of a hinge member 8 defining a substantially horizontal pivot axis. The inclination of the tower 6 is adjustable and can be held by connecting arms 7 .

[0073] Near the top of the tower 6, a pipeline guide wheel 3 or other guiding structure is installed for guiding the pipeline from the storage reel (not shown here) to the trigger line 4 extending along the tower 6 . Reference numeral 1 c designates the line section coming from the storage reel and passing over the guide wheel 3 .

[0074] During normal pipe laying, a continuous pipeline runs from the guide wheel 3 in said trigger line 4 in direction A to the seabed (not shown). The deployed pipeline ...

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PUM

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Abstract

Marine pipelaying method and system for installing an offshore pipeline (1) that includes one or more accessories (10). The method includes the steps of providing a vessel (2), launching the pipeline (1) in a firing line from the vessel (2) in the direction of the seabed, engaging the pipeline (1) with a clamping device (5b) that is connected to the vessel (2) and adapted to support the weight of the previously launched pipeline (1), and moving the accessory (10) into the firing line to a position above the clamping device (5b). Then the accessory (10) is connected to the pipeline (1) above the clamping (5b) device while the pipeline (1) is held by the clamping device (5b) Follow that the accessory (10) and the launched pipeline (1) connected thereto and releasably secured to a controlled load hoisting device (5) and the weight of the accessory (10) and the launched pipeline (1) connected thereto are transferred from the clamping device (5b) to the controlled load hoisting device (5) while the accessory (10) and the launched pipeline (1) connected thereto remain in the firing line. Finally the clamping device (5b) is disengaged from the pipeline (1) and moved away from firing line. Then the accessory (10) and the launched pipeline (1) connected thereto are lowered along the firing line by the controlled load hoisting device (5).

Description

technical field [0001] The invention relates to the underwater arrangement of offshore pipelines. More specifically, the subject matter of the present invention relates to an offshore piping system and method for installing an offshore pipeline with one or more attachments. Background technique [0002] Subsea pipelines are mostly deployed on the ocean floor by being connected or welded on the deck of the ship, lowering the rear of the ship and then laying on the ocean floor. The offshore pipeline industry uses a variety of piping concepts. [0003] A generally known technique is called the S-arrangement technique. In the S-layout technique, sections of pipe are added to a pipeline that has previously been launched into the water in an assembly line, usually including one or more welding stations, that is deployed at or near the level of a pipe-laying vessel such as a lay barge. horizontal position. The pipeline is then bent over the stern by means of a ramp or guide fra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/14
CPCF16L1/23F16L1/14F16L1/19F16L1/207
Inventor 朱普·卢登伯格安妮·K·德格鲁特迪德里克·B·威吉宁
Owner ITREC BV
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