Sieve hole air-jetting vortex-induced vibration suppression device and method

A technology of vortex-induced vibration and suppression device, which is applied in earthwork drilling, fluid flow, drilling equipment and other directions, can solve the problems of limited effect of passive suppression and control of flow field, difficulty in adapting to deep-sea marine environment, slow development of active suppression technology, etc. The effect of suppressing vortex-induced vibration, prolonging life, and being less prone to corrosion and damage

Inactive Publication Date: 2014-06-25
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because changing the surface shape and structure of the riser will increase the difficulty of pipeline processing technology, and the effect of passive suppression to control

Method used

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  • Sieve hole air-jetting vortex-induced vibration suppression device and method
  • Sieve hole air-jetting vortex-induced vibration suppression device and method
  • Sieve hole air-jetting vortex-induced vibration suppression device and method

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Experimental program
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specific Embodiment

[0025] According to the perennial statistical information of local ocean waves and currents and the water depth of the riser 2, calculate the water pressure to be borne by the bottom exhaust screen 6, and determine the bottom exhaust screen 6, exhaust screen 7, and top exhaust screen The wall thickness of pipe 8 and the gas injection pressure of gas injection pipe 3.

[0026] When the device is installed, first, the bottom exhaust screen 6 is set outside the riser 2; under the bottom exhaust hole 9 of the bottom exhaust screen 6, it is embedded between the bottom exhaust screen 6 and the riser 2 Air distribution plate 10; then, install the bottom plate 5 at the bottom of the riser 2; pass the gas injection pipe 3 through the bottom plate 5, and connect with the U-shaped diversion elbow 4; the other end of the U-shaped diversion elbow 4 passes through the bottom plate 5 to extend into the annular space between the riser 2 and the bottom exhaust screen 6, and there is a gap betw...

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Abstract

The invention relates to a sieve hole air-jetting vortex-induced vibration suppression device and method. The sieve hole air-jetting vortex-induced vibration suppression device is characterized by comprising an air injection pipe, a U-shaped flow guide bent pipe, a bottom air exhaust sieve pipe, an air exhaust sieve pipe, a top air exhaust sieve pipe, an air distribution plate, a base plate and a top plate, wherein the air exhaust sieve pipe is arranged outside a water isolation pipe in a sleeved mode, the air injection pipe leads high-pressure air flow into an annular space between the air exhaust sieve pipe and the water isolation pipe through the U-shaped flow guide bent pipe, the air flow flows out from air exhaust holes in the air exhaust sieve pipe, a seawater streaming boundary layer on the surface of a pipeline is damaged, formation of vortexes of the tail of the pipeline is interfered, and vortex-induced vibration is effectively suppressed. The sieve hole air-jetting vortex-induced vibration suppression device and method can deal with flow in different directions, is not corroded or damaged easily, is put in along with the water isolation pipe in the on-site construction process, does not affect the normal construction process, can be recycled after construction, and saves cost.

Description

technical field [0001] The invention belongs to the technical field of marine riser facilities laying, and in particular relates to a sieve-hole jet-type vortex-induced vibration suppression device and method. Background technique [0002] Onshore oil and gas resources are increasingly depleted, and people have to intensify the development of offshore oil and gas, especially deep sea oil and gas. The marine riser is a key component connecting the underwater wellhead and the offshore platform, and undertakes the task of safely transporting drilling fluid and production fluid. When waves and ocean currents flow through the riser, irregular vortices will be generated on the back of the riser, and the shedding of the vortex will cause the riser to vibrate and form vortex-induced vibration. Once the vortex shedding frequency is equal to the natural frequency of the riser, it will cause resonance, which will cause accidents such as breakage and failure of the riser, resulting in ...

Claims

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Application Information

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IPC IPC(8): E21B17/10F15D1/00
Inventor 朱红钧林元华巴彬赵洪南李薛姚杰韩青华马成学
Owner SOUTHWEST PETROLEUM UNIV
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