Combined strengthening type bulking-preventing device capable of preventing submarine pipeline from bulking-propagation

Abstract

The invention belongs to the technical field of submarine pipeline paving and relates to a combined strengthening type bulking-preventing device capable of preventing a submarine pipeline from bulking-propagation. The combined strengthening type bulking-preventing device capable of preventing the submarine pipeline from bulking-propagation is fixed on the exterior of the submarine pipeline which is needed to be protected. The combined strengthening type bulking-preventing device capable of preventing the submarine pipeline from bulking-propagation comprises at least two arc-shaped long-striped steel plates and at least two steel rings. A cross section of every arc-shaped long-striped steel plate is a section of a circular arc. The inner radius of the circular arc is equal to the outer radius of the submarine pipeline. A plurality of arc-shaped grooves are arranged inside of the steel rings. The inner diameters of the steel rings are equal to the outer diameter of the submarine pipeline. The number of the arc-shaped grooves is not less than the number of the arc-shaped long-striped steel plates. The width of the grooves is equal to the width of the arc-shaped long-striped. Each arc-shaped long-striped steel plate is uniformly distributed on the exterior of the submarine pipeline along the axial direction of the pipeline. Each arc-shaped long-striped steel plate is fit with the submarine pipeline and is embedded in an arc-shaped groove of each steel ring. The combined strengthening type bulking-preventing device capable of preventing a submarine pipeline from bulking-propagation is light in weight, easy to install and capable of having high efficiency at the same time.

Description

technical field [0001] The invention belongs to the technical field of submarine pipeline laying, and relates to a buckling arresting device. Background technique [0002] Submarine pipeline is an important way of oil and gas transportation in offshore oil engineering, and its safe operation is the key to ensure the smooth progress of offshore oil and gas production. The pipe is in an empty state during laying, there is no internal pressure to balance the external water pressure, in addition, the pipe tensioner will give the pipe pre-tension stress, so the pipe will be stretched, resulting in a reduction in the pipe wall thickness, these factors make the pipe in the external water It is easy to crush under pressure. Buckling and crushing will also occur when the pipeline is in-situ and in operation due to corrosion or external forces such as ship unanchoring and impacting the pipeline, seabed force, bending moment caused by seawater, or other disturbances. Under the action...

AI Technical Summary

Problems solved by technology

[0004] In terms of anti-bending performance, the integral anti-bending device has the best anti-bending effect, but due to its large thickness and length, it is heavy, which brings inconvenience to installation and transportation, and has extremely high requirements on welding quality and water tightness. complex and expensive

The snap-in buckle arrester has a simple structure and is easy to manufacture, but its buckle arrest efficiency is low, and it is prone to bolt punching and shear damage, so it is not suitable for deep water pipelines

Welding the snap-in buckle arrester and the pipe at their connection can form a welded buckle arrester, but because the welding position is limited to the place where the edge of the buckle arrester contacts the pipe, the welding area is relatively small. The buckle arrester and the pipe cannot form an effective whole, so the efficiency of the buckle arrester is not greatly improved

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