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Subsea pipeline scouring protection device using flexible plate group

A technology for submarine pipelines and protection devices, which is applied in the direction of pipeline protection, pipeline damage/wear prevention, pipeline laying and maintenance, etc. It can solve the problems of large lodging and poor silt promoting effect of flexible protection technology, and achieves good silt promoting effect and low cost. Low, simple structure effect

Active Publication Date: 2016-06-29
ZHEJIANG INST OF HYDRAULICS & ESTUARY
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problems of excessive lodging and poor silt-promoting effect of the existing flexible protection technology, and provide a flexible plate group scour protection device for submarine pipelines. The device has a simple structure, low cost, and small lodging. Good silt-promoting effect, applicable to various water flow conditions

Method used

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  • Subsea pipeline scouring protection device using flexible plate group

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Embodiment approach

[0027] Firstly, the production of seabed backing board and flexible board is completed on land. The finished materials are transported to the construction site by the construction ship, and the flexible board is fixed on the seabed backing board with angle codes and screws. After fixing, use the lifting device to throw the seabed backing plate and flexible plate into the sea, and lay them on the upstream side of the pipeline. For the reciprocating current situation, a seabed backing plate and a flexible plate group need to be laid on both sides of the pipeline, and then underwater divers use underwater piling equipment to drive anchor piles into the seabed to fix the device.

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Abstract

The invention relates to a subsea pipeline scouring protection device using a flexible plate group and aims to provide a device which is simple in structure, low in cost, small in lodging and excellent in siltation promotion effect and is suitable for various water flow conditions. The technical solution adopted by the invention is as follows: a subsea pipeline scouring protection device using a flexible plate group comprises at least one seabed base plate which is horizontally paved beside a subsea pipeline; the subsea pipeline scouring protection device using the flexible plate group is characterized by further comprising a plurality of flexile plates arranged on the seabed base plate; an angle formed by the plane of the flexible plates and the axis of the subsea pipeline is smaller than plus-minus 15 degrees; and the seabed base plate is fixed at subsea by anchor piles.

Description

technical field [0001] The invention relates to a seabed pipeline scour protection device, in particular to a submarine pipeline scour protection device utilizing flexible board groups. Background technique [0002] The normal operation of submarine pipelines is an important guarantee for the safe production of offshore oil and gas fields. After the submarine pipeline is laid, the dynamic balance of the underwater flow field is broken, resulting in an increase in the local water flow velocity, forming a flow velocity gradient concentration area within a certain range, and forming a strong shearing effect on the seabed and a disturbance of a local large-scale vortex , which in turn causes the erosion of the local seabed of the submarine pipeline, resulting in the suspended span of the laid submarine pipeline. Fatigue damage causes pipeline fracture and oil and gas leakage. Therefore, the development of new, efficient and economical submarine pipeline scour protection technol...

Claims

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Application Information

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IPC IPC(8): F16L57/00F16L1/12
CPCF16L1/123F16L57/00
Inventor 张芝永杨元平吴修广曾剑王瑞锋邵杰
Owner ZHEJIANG INST OF HYDRAULICS & ESTUARY
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