Welded submarine pipeline buckling stopper with base

Abstract

The invention belongs to the technical field of laying of submarine pipelines, and relates to a welded submarine pipeline buckling stopper with a base. The bucking stopper comprises an upper section shell (1) and a lower section shell (2), wherein the upper section shell (1) and the lower section shell (2) are same in structure, and the inner diameter of the upper section shell (1) and the inner diameter of the lower section shell (2) are matched with the outer diameter of a submarine pipeline; the shells are mutually symmetrical in the axial direction, each shell comprises a middle axial supporting part (6) and hollow-out parts located on the two sides of the axial supporting part, an arched support (7) is arranged on each hollow-out part, and the top point of each arched support (7) is integrated with the axial supporting part. The buckling stopper further comprises the base (3), the base comprises a substrate, a groove (5) used for containing the submarine pipeline is formed in the middle of the substrate, and supports (4) inclined inwards are arranged on the periphery of the substrate. The buckling stopper is simple in structure, easy to machine and install, light in weight, low in cost and meanwhile capable of effectively controlling buckling spreading of the pipeline and reducing movement of the pipeline.

Description

technical field [0001] The invention belongs to the technical field of subsea pipeline laying, and relates to a welded subsea pipeline buckle arrester with a base. Background technique [0002] When the submarine pipeline is in operation, buckling and crushing may occur when the pipeline is corroded or the internal pressure of the pipeline is insufficient. When the pipeline is subjected to a third-party external force such as a broken anchor hitting the pipeline, seabed force, bending moment caused by seawater or other disturbance forces, the pipeline will also buckle and collapse. Under the action of external water pressure, the buckling along the pipeline axis spread, eventually leading to the destruction of the entire pipeline. Nowadays, the oil and gas development in all countries in the world is marching into the deep sea. The deep sea environment is complex, and various external forces are coupled to the pipeline. Once the pipeline buckles locally, the buckling will s...

AI Technical Summary

Problems solved by technology

[0004] The complex environmental load on the seabed acts on the pipeline, which will cause lateral displacement of the submarine pipeline, and the pipeline will be subjected to lateral bending moments, which will reduce the service life of the pipeline. Therefore, increasing the in-situ stability of the pipeline is also a concern in current projects

Generally, the in-situ stability of the pipeline can be increased by increasing the underwater weight of the pipeline or burying or covering the pipeline. The increase in the underwater weight of the pipeline is generally achieved by increasing the thickness of the concrete counterweight layer of the pipeline. Higher requirements will be placed on the pipe laying process; and if the pipe is buried or covered, it will require huge construction costs

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