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

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 ...

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 the flow field is limited, and the development of active suppression technology is slow. Poor performance, it is difficult to adapt to the complex deep-sea marine environment

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