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Bubble-column vortex-induced vibration suppression device of stand pipe under marine environment

A suppression device and marine environment technology, applied in the direction of underwater drilling, production fluid, wellbore/well components, etc., can solve the problems of not considering countermeasures, dispersing and reducing the force of incoming flow on the riser, etc., to achieve The installation method is flexible, the cost is low, and the effect of manufacturing is simple

Inactive Publication Date: 2013-03-20
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A common feature of these devices is the use of rigid bodies in contact with the incoming flow, without considering the dispersion and reduction of the force of the incoming flow on the standpipe, and without considering the countermeasures under the vortex-induced force

Method used

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  • Bubble-column vortex-induced vibration suppression device of stand pipe under marine environment
  • Bubble-column vortex-induced vibration suppression device of stand pipe under marine environment
  • Bubble-column vortex-induced vibration suppression device of stand pipe under marine environment

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Embodiment Construction

[0027] The device of the present invention is a device for suppressing vortex-induced vibration of a standpipe foam column in a marine environment. The foam-shaped column is used to suppress vortex-induced vibration, and it has various implementation modes. The unit body of the foam column eddy vibration suppression device in each mode is basically always composed of two parts: the bracket and the foam column (such as figure 1 As shown), the scaffold is composed of the matrix 3 and the control body 4, and the bubble column is composed of the response surface 5 and the response body 6. Because the foam column is the core of vortex-induced vibration suppression, this device can be called a foam column vortex vibration suppression device. The outer radius of the riser is set to R, the radius of the base is set to r, the thickness of the base is set to d, the thickness of the responding volume is set to D, and the height of the control volume is set to h.

[0028] ●Method 1

[0...

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Abstract

The invention provides a bubble-column vortex-induced vibration suppression device of a stand pipe under a marine environment. The whole bubble-column vortex-induced vibration suppression device is composed of one or more bubble-column vortex-induced vibration suppression units (units for short), wherein the units are unequal in height and thickness. Each unit is a gas-filled (liquid-filled) column body and consists of a bracket and a bubble-column, wherein the bracket is used for connecting the bubble-column with the stand pipe and is composed of a base body and a control body, the bubble-column is used for realizing vortex-induced vibration suppression and is composed of a response surface and a response body, wherein the response surface is made of a material capable of bending and deforming along with the stress, and the response body is gas (liquid). The bubble-column vortex-induced vibration suppression device is flexible to manufacture and mount, can be directly sleeved on the stand pipe and can be also machined into a whole together with the stand pipe. The bubble-column vortex-induced vibration suppression device disclosed by the invention has the advantages of suppressing the occurrence of vortex by responding incoming flow and dispersing and eliminating the acting force to the stand pipe, which is formed by movement of flow field near the stand pipe by using the response surfaces and the response bodies.

Description

technical field [0001] The invention belongs to the technical field of offshore oil drilling equipment, and relates to a vortex-induced vibration suppression device. Background technique [0002] In the process of offshore oil drilling and exploitation, the riser is an important connection structure connecting the offshore platform and the submarine device. When the oceanic fluid flows through the riser, under a certain fluid motion state, vortices will be alternately generated and released on both sides of the riser. When the vortex falls off, it will alternately generate a drag force on the standpipe, so the riser will vibrate in the direction perpendicular to the ocean current; the vibration of the standpipe will react on the flow field and strengthen the vortex. When the vortex shedding frequency is consistent with or close enough to the natural vibration frequency of the riser in the ocean current field, the riser vibration and vortex shedding are "locked", and the for...

Claims

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Application Information

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IPC IPC(8): E21B43/01E21B7/12
Inventor 邱全锋谢祥俊林元华钟莉
Owner SOUTHWEST PETROLEUM UNIV
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