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Deepwater pipeline buckle arrestor reinforcing method

A technology for deep-water pipelines and buckling stoppers, which is used in pipeline laying and maintenance, pipes/pipe joints/fittings, machinery and equipment, etc., can solve the problem of poor buckling stopper effect, difficult replacement and installation of snap-in buckling stoppers, and difficulties in reinforcement. and other problems, to achieve the effect of cost reduction, stability and safety, and common structure.

Inactive Publication Date: 2017-11-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the deformation of the pipeline, it is difficult to replace and install the snap-in buckle arrester, which brings certain difficulties to the reinforcement
Although the wrapping arrester is more flexible, the effect of arresting the bend is worse than that of the snap-in arrester

Method used

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  • Deepwater pipeline buckle arrestor reinforcing method
  • Deepwater pipeline buckle arrestor reinforcing method
  • Deepwater pipeline buckle arrestor reinforcing method

Examples

Experimental program
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Embodiment Construction

[0022] The present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 As shown, the present invention includes a snap-in buckle arrester 2 , a wrap-around buckle arrester 3 and a subsea pipeline 1 . The material of the buckle arrester is API 5L X65 or higher grade steel that is the same material as the subsea pipeline 1. The function of the winding-type buckle arrester 3 is to reinforce and maintain the structure of the submarine pipeline 1 and the snap-in buckle arrester 2 that are likely to be deformed or have already been deformed by using the flexible installation method of the buckle arrester 3 during winding, so as to The local hoop stiffness of the submarine pipeline 1 is improved, buckling propagation of the submarine pipeline 1 is prevented, and stability and safety are improved.

[0024] Such as figure 1 with figure 2 As shown, the snap-in buckle arrester 2 is a cylindrical shell structure, ...

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Abstract

The invention relates to a deepwater pipeline buckle arrestor reinforcing method. Firstly, a slip-on arrestor is adopted as the primary buckle arrestor for buckle arresting of a pipeline, and the buckle arrestor is fixed to the outside of the submarine pipeline. The method is characterized in that the submarine pipeline which has the high probability for deformation or is deformed already and the slip-on arrestor are reinforced and maintained. The method comprises the step that a spiral arrestor is further fixed to the outside of the slip-on arrestor, the maximum diameter of the section of the spiral arrestor is 1-2 times of the wall thickness of the slip-on arrestor, and the diameter of the section of a steel bar used by the spiral arrestor is consistent with that of the section of the spiral arrestor.

Description

technical field [0001] The invention belongs to the technical field of submarine pipeline laying, and in particular relates to a method for reinforcing a buckle arrester. Background technique [0002] my country is rich in marine resources and a solid industrial foundation, and has great potential for industrialization of marine development. For my country, offshore oil and gas is the strategic focus of my country's energy industry development, and the task of developing the ocean is becoming more and more important and urgent. The medium for oil and gas transportation is the submarine pipeline, which ensures the normal operation of the entire system, and its stability and safety are extremely important for offshore oil and gas development. [0003] Submarine pipelines may buckle and collapse under the action of external water pressure. The pipeline is a cylindrical shell structure, and its buckling strength mainly depends on factors such as the diameter-thickness ratio of...

Claims

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Application Information

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IPC IPC(8): F16L1/20
CPCF16L1/20
Inventor 余建星安思宇余杨段晶辉韩梦雪
Owner TIANJIN UNIV
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