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Subsea pipeline floating ball type flexible washing protection device

A technology for submarine pipelines and protective devices, which is used in pipeline protection, pipeline damage/wear prevention, pipeline laying and maintenance, etc., can solve problems such as high cost and poor reliability, and achieve low overall cost, easy construction and maintenance, and low cost. Effect

Inactive Publication Date: 2015-07-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention provides a floating ball type flexible scouring protection device for submarine pipelines, which solves the poor reliability of the practical effect and the equipment cost and construction process cost of various protection schemes for the scouring protection technology of the submarine pipeline in the prior art. expensive problem

Method used

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  • Subsea pipeline floating ball type flexible washing protection device
  • Subsea pipeline floating ball type flexible washing protection device
  • Subsea pipeline floating ball type flexible washing protection device

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Embodiment Construction

[0023] specific implementation

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] The technical principle of the present invention is: use a series of floating balls arranged along the pipeline to form a porous medium barrier to the water flow, reduce the flow velocity of the near-bottom water flow, and push the high-speed water flow upward to reduce the sediment start near the pipeline, It forms an effect similar to that of an onshore windproof pseudo-dust net; in addition, the water flowing through the floating ball will form a vortex around the floating ball, which will cause the vortex-induced vibration or swing of the floating ball, which can effectively dissipate the energy of the water flow and achieve the purpose of reducing local erosion of the pipeline.

[0026] The device of the present invention is composed of three or more floating ball protection units, and each floating ball protection unit is m...

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Abstract

The invention discloses a subsea pipeline floating ball type flexible washing protection device. The subsea pipeline floating ball type flexible washing protection device is composed of three or more floating ball protection units, wherein each floating ball protection unit comprises a ballasting block body and a floating small ball; the ballasting block bodies and the floating small balls, and the floating small balls are connected by connection ropes; the floating ball protection units are distributed at the periphery of a subsea pipeline to form a protection layer similar with a porous screen plate. The device has lower construction cost and is very convenient to construct; the whole protection device can be directly thrown into water to construct after being positioned under the conditions that the water flow speed is smaller and the water depth is moderate; the volumes of the small balls are slowly expanded and become large under the water under the condition that the water flow speed or the water depth is larger, so that the offset distance of the whole device is reduced; the mounting precision is improved or the construction can be carried out at the position which has a certain distance from a mounting position; the positioned construction is realized under the action of water flow. The method can be used for effectively reducing the water flow speed at the periphery of silt, accelerating the starting speed of the silt, and improving the anti-washing capability of the silt at the periphery.

Description

technical field [0001] The invention belongs to the technical field of submarine pipeline construction and operation, and in particular relates to a partial scour protection device for a submarine pipeline under the action of water flow. Background technique [0002] Submarine pipeline is an important facility for transporting oil and gas resources on the seabed, and its structural safety is an important issue in the development of offshore oil and gas resources. Pipelines laid bare on the seabed often change the local flow field structure at the bottom of the seabed, resulting in three-dimensional eddies and increased water flow turbulence. Such hydrodynamic structures further drive the movement of seabed sediment near the pipeline, especially in sandy and silty seabed, strong sediment movement will quickly form local scour pits around the pipeline. After scour pits distributed unevenly along the pipeline are formed, the pipeline hangs over. When the length of the suspens...

Claims

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Application Information

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IPC IPC(8): F16L57/00F16L1/12
CPCF16L1/123
Inventor 许栋徐彬黄雄合宛鹏刘堃苏俐珊杨璐璐及春宁
Owner TIANJIN UNIV
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