Method for fixing seabed pipeline and preventing buckle propagation

A submarine pipeline and anti-bending technology, applied in pipeline laying and maintenance, pipeline supports, pipes/pipe joints/fittings, etc., can solve problems such as large vertical uplift or lateral displacement, achieve convenient operation, reduce manufacturing costs, avoid The effect of structural damage

Active Publication Date: 2011-02-02
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, traditional buckling arrest methods, such as outsourcing steel or expanding section reinforcement, can only control the local deformation of the part, but are powerless against the overall buckling
Even if the subsea pipeline installed with buckling arrestors is under complex loads, there is still the risk of large vertical uplift or lateral displacement. At present, there is no device that can prevent local buckling propagation and overall buckling.

Method used

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  • Method for fixing seabed pipeline and preventing buckle propagation
  • Method for fixing seabed pipeline and preventing buckle propagation
  • Method for fixing seabed pipeline and preventing buckle propagation

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Embodiment Construction

[0017] The invention is used to fix the submarine pipeline and prevent buckling propagation through the method of installing anti-bending fixers at intervals on the submarine pipeline. The main steps are as follows:

[0018] According to the outer diameter and wall thickness of the submarine pipeline to be protected, an inverted U-shaped shell with the same inner diameter and tangent outer edge can be manufactured, and the upper shell and the lower base can be mass-produced through two molds.

[0019] First, wrap a layer of rubber on the outer surface of the pipe, attach the upper shell to the rubber layer on the surface of the pipe, and connect it to the lower base according to the position of the eye plate, and then pass through the eye plate through 4 sets of matching bolts and nuts. Two housings are fixed to the pipe.

[0020] During the pipe laying operation, the barrel structure is inserted into the seabed soil by negative pressure sinking. Adjust the position of the p...

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Abstract

The invention belongs to the technical field of seabed pipeline laying and particularly relates to a method for fixing a seabed pipeline and preventing buckle propagation. The method comprises: manufacturing a plurality of pairs of reversed U-shaped shells of which the inside diameters are the same and the outer edges are tangent according to the outside diameter and wall thickness specification of the seabed pipeline, wherein the upper parts of the shells are in semi-annular shapes and the lower parts of the shells have semi-cylindrical hollow cuboid bases; connecting the surfaces of the bases with barrel structures to form buckle preventing fixers; and mounting the fixers on the seabed pipeline at intervals along a radial direction. The method adopts a reasonable mounting process, and can simplify operation, reduce cost, effectively fix the seabed pipeline and prevent buckle propagation, and ensure the safe and stable operation of the seabed pipeline.

Description

technical field [0001] The invention belongs to the technical field of laying submarine pipeline facilities, and in particular relates to a method capable of fixing submarine pipelines and preventing buckling propagation. Background technique [0002] Submarine pipelines are the lifeblood of modern offshore oil and gas development and transportation, known as the "marine lifeline". With the development of deep-sea oil and gas fields, most of the pipelines will operate in sea areas with a water depth of 2000-3000 meters. Deep-sea pipelines are usually placed bare on the seabed. Submarine pipelines not only bear the functions of self-weight, external hydrostatic pressure, internal pressure, medium temperature, prestress, force of pipeline accessories, force of covering and seabed, force caused by pigging operation, etc. Moreover, it is affected by environmental loads such as wind, waves, currents and earthquakes, and also faces the challenges of extreme sea conditions, ship c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L3/10F16L1/16F16L1/20
Inventor 杜尊峰
Owner TIANJIN UNIV
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