A submarine pipeline protection device with deflector

Abstract

The invention belongs to the technical field of submarine pipeline device laying and producing, and relates to a submarine pipeline protection device with a guide plate. The submarine pipeline protection device comprises the bottom guide plate (5), an upper protection shell (1) and at least one internal supporting structure, wherein the bottom guide plate (5) is arranged on the lower portion of a submarine pipeline (4) to be protected, a certain distance is formed between the upper portion of the upper protection shell (1) and the submarine pipeline (4), and the distance is protected in a supporting mode through the internal supporting structure. All the internal supporting structures are distributed in the axial direction of the submarine pipeline (4), each internal supporting structure is composed of an arc plate (3) tightly attached to the submarine pipeline (4) and a plurality of supporting radial bars (2), the lower end of each supporting radial bar (2) is fixed on the corresponding arc plate (3), and the upper end of each supporting radial bar (2) is fixed on the inner side of the upper protection shell (1). The submarine pipeline protection device is simple in structure, lowers cost, can effectively prevent seepage scour of the seabed under the pipeline, and can reduce the influence of falling article impact on the submarine pipeline.

Description

Technical field [0001] The invention belongs to the technical field in the process of laying and production of submarine pipeline facilities, and specifically relates to a device that can effectively prevent the submarine pipeline from being scoured and being impacted by falling objects to cause depression and leakage. Background technique [0002] Submarine oil and gas pipelines are the main means of production and transportation in offshore oil and gas development. As the marine environment of submarine pipelines is very complicated, the mutual influence of many uncertain factors makes the laying and operation of submarine pipelines more risky, and the damage caused by scouring suspended and falling objects impacts is endless. [0003] Due to differences in laying depth and seabed geology, changes in the size and direction of ocean currents and waves, and different requirements for the safe life of submarine pipelines, the laying methods of submarine pipelines in the seabed are a...

AI Technical Summary

Problems solved by technology

Buried pipelines are generally not directly affected by sea surface waves and ocean bottom ocean currents, and have high safety and reliability, but the laying costs are expensive and the construction is difficult. Only some oil pipelines with long service periods and high safety requirements Gas pipelines are laid in this way

Straight-laying pipelines are easy to construct and low in cost. They are currently the main laying method for deep-sea pipelines. However, they are directly exposed to seawater and are significantly affected by environmental loads such as ocean currents and waves. Sometimes, piping and suspension may even occur, causing the pipeline to lose stability. Under the long-term action of environmental loads, the suspended section is prone to failure due to floating or lateral buckling and vortex-induced vibration, causing damage such as fracture, resulting in huge economic losses and environmental damage. Pollution

[0004] At present, deepwater oil and gas development mostly adopts the development mode of underwater production system, and objects that may fall during operations such as superstructure hoisting pose great risks to the intricate submarine pipelines

Due to the general mass and volume of falling objects, once they fall into the sea and hit the submarine pipeline, the light one will cause the pipeline to sag, and the heavy one will cause puncture and oil and gas leakage, which will not only affect oil and gas development, pollute the marine environment, but also block and repair also very difficult

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