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Method for suppressing vortex-induced vibration of marine oil pipeline

An oil pipeline, vortex-induced vibration technology, applied in the direction of pipeline laying and maintenance, pipe components, pipe/pipe joints/pipe fittings, etc., can solve the problems of high design, manufacturing and installation costs, dynamic instability, increased main pipe drag force, etc. , to simplify the manufacturing process, reduce construction costs, and improve work efficiency.

Inactive Publication Date: 2012-02-15
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most suppression measures with simple structures have unidirectional characteristics, and omnidirectional suppression measures with complex structures have better performance, but the design, manufacture and installation costs are high, and often cause the increase of the drag force of the main pipe, and there is also dynamic instability. And other issues

Method used

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  • Method for suppressing vortex-induced vibration of marine oil pipeline
  • Method for suppressing vortex-induced vibration of marine oil pipeline
  • Method for suppressing vortex-induced vibration of marine oil pipeline

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Embodiment Construction

[0014] The invention suppresses the vortex-induced vibration of the ocean oil pipeline by installing a sleeve with a spiral groove at a certain distance on the ocean oil pipeline. The main steps are as follows:

[0015] (1) According to the outer diameter and wall thickness of the ocean oil pipeline to be protected, two semi-circular shells with the same size are made, which can be mass-produced through moulds.

[0016] (2) Place the first shell close to one side of the pipeline surface, and connect the other shell with the shell already in place through the position of the eye plate and the rotation direction of the spiral groove.

[0017] (3) The two shells are fixed by 6 bolts. Bolts pass through the eye plate to connect the two shells to form a sleeve fixed on the outer surface of the pipeline.

[0018] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] Front view of a section of mari...

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Abstract

The invention belongs to the technical field of pavement of marine oil pipeline facilities, and relates to a method for suppressing vortex-induced vibration of a marine oil pipeline. In the method, multiple pairs of semicircular shells which are of the same size and are provided with spiral grooves on the outer surfaces are made according to the outer diameter and the wall thickness of the marine oil pipeline; outwardly extending eye plates are arranged; after a pair of shells is connected into an annular post, the spiral grooves on the shells are matched with each other to form the same spiral structure for constituting a sleeve; and sleeves are arranged in the radial direction of the marine oil pipeline at a certain interval according to the method. Due to the adoption of the method, the vortex-induced vibration of the marine oil pipeline is controlled effectively, and unity of economic efficiency and safety is realized.

Description

technical field [0001] The invention belongs to the technical field of laying marine oil pipeline facilities, and in particular relates to a method capable of suppressing vortex-induced vibration of marine oil pipelines. Background technique [0002] During the offshore laying of marine oil pipelines (riser pipes and submarine pipelines, etc.), there is usually a rather long suspension span between the pipe-laying ship and the seabed. In addition, even if the pipeline is laid on the seabed, under the joint action of ocean currents, tides and other factors, the pipeline is exposed to the seabed soil to form a suspended section. Under the long-term action of environmental load, vortex-induced vibration is prone to occur in the suspended section and cause fatigue failure, leading to serious consequences such as facility damage or even shutdown, which brings huge economic losses to the development of offshore oil and natural gas. Engineering is of great significance. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/04F16L1/16
Inventor 李彦苍索娟娟周书敬杜尊峰恒北北
Owner HEBEI UNIV OF ENG
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