Vibration suppression device and method for discharging and sucking seawater by pressure difference of fluctuation of waves

A technology of wave undulation and suppression device, applied in the direction of earthwork drilling, drilling equipment, drill pipe, etc., can solve the problem of only targeting and can only work within a specific flow rate range, etc., and achieve the effect of strong structural symmetry

Inactive Publication Date: 2018-09-28
SOUTHWEST PETROLEUM UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the face of complex marine environments, existing control measures still have certain limitations, such as only targeting specific flow directions and working within specific flow velocity ranges, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Vibration suppression device and method for discharging and sucking seawater by pressure difference of fluctuation of waves
  • Vibration suppression device and method for discharging and sucking seawater by pressure difference of fluctuation of waves
  • Vibration suppression device and method for discharging and sucking seawater by pressure difference of fluctuation of waves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] Such as figure 1 As shown, when installing the device of the present invention, first install the bracket, use bolts to fix the inner collar 2 on the marine riser 1; Through the socket 9 on the outer ring 3, the side with the seawater suction hole 5 is located at the upper part, and the side of the gas chamber is located at the lower part; the connecting rod 8 of the inner outer ring is passed through the threaded through hole 10 on the outer ring 3 and Load onto nut 12 on the threaded side for fixing.

[0027]After the installation is completed, the ocean riser 1 equipped with the device is placed vertically in the ocean current. On the one hand, the wave undulation directly causes the rise and fall of the sea surface water level, which in turn leads to the change of the hydrostatic column pressure acting on the piston 7 in the subsidiary circular tube 4: (1) When the sea surface water level rises by Δh, due to the height of the piston 7 and the sea surface water leve...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a vortex-induced vibration suppression device and method for discharging and sucking seawater by pressure difference of fluctuation of waves. The vortex-induced vibration suppression device is composed of a bracket and a seawater sucking system. The bracket is used for fixing the seawater sucking system on a marine riser. The seawater sucking system is composed of eight auxiliary circular pipes evenly distributed in the circumferential direction of the marine riser. Seawater discharging and sucking holes distributed in a staggered mode are formed in the upper parts ofthe auxiliary circular pipes, gas chambers are formed in the lower parts of the auxiliary circular pipes, the chambers are filled with compressible gas, disc-shaped pistons and limit rings are sequentially arranged on the upper part of the chambers, and the pistons can freely move up and down in the lower spaces of the limit rings. The vortex-induced vibration suppression device utilizes the pressure difference of the fluctuation of the waves to induce seawater to be continuously sucked and discharged from the auxiliary circular pipes, the boundary layer separation and vortex shedding of the marine riser are disturbed under the combined actions of the constant adjustment of the flow and momentum and the interference of a flow field of the auxiliary circular pipes, and thus the vortex-induced vibration suppression is realized without energy consumption.

Description

technical field [0001] The invention belongs to the technical field of laying of marine riser facilities, and in particular relates to a vortex-induced vibration suppression device and method for absorbing seawater by using wave undulation pressure difference. Background technique [0002] Offshore risers are necessary equipment for the development of offshore oil and natural gas, and are the key channel connecting underwater wellheads and offshore platforms. Once the offshore riser is damaged and fails, it will not only waste oil and gas resources, but also cause great damage to the environment. . In the form of failure of marine risers, vortex-induced vibration has always been a factor that cannot be ignored: on the one hand, vortex-induced vibration will cause fatigue damage to marine risers and shorten service life; on the other hand, marine risers required for deep-water offshore oil and gas development The ratio of length to diameter is getting larger and larger, and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/01E21B17/10F15D1/00
CPCE21B17/01E21B17/1078F15D1/008
Inventor 朱红钧唐涛王珂楠李国民胡昊
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap