Vortex-induced vibration preventing deep-sea vertical pipe for deep-sea resource development

Abstract

The invention provides a vortex-induced vibration preventing deep-sea stand pipe for deep-sea resource development, and relates to the technical field of deep-sea mining. The device comprises a vertical pipe, a plurality of flow guide components and a fitting component, each flow guide part comprises a flow guide block and a plurality of flow guide short plates, and the flow guide short plates are arranged on the periphery of the outer ring of the flow guide block at intervals; the inner ring of the flow guide block is rotatably connected to the periphery of the outer ring of the attaching component in a sleeving manner; the inner ring of the attaching component is elastically and fixedly connected with the periphery of the outer ring of the vertical pipe. Due to the fact that the flow guide block can rotate around the vertical pipe, the flow guide block can adapt to vibration of the vertical pipe caused by the flowing directions of ocean currents in different areas, and vortex-induced force borne in the ocean currents is subjected to self-adaptive rotating adjustment. The flow guide short plates and the flow guide blocks which are arranged at intervals are matched with each other, so that vortex-induced vibration generated when the vertical pipe resonates is well prevented.

Description

technical field [0001] The invention relates to the technical field of deep-sea mining, in particular to a deep-sea riser for preventing vortex-induced vibration for deep-sea resource development. Background technique [0002] Deepwater oil and gas exploitation inevitably suffers from the complex and changeable ocean wave flow hydrodynamic environment, and the marine riser exposed in deep water has a large slenderness ratio, which serves as a key channel connecting the wellhead and the upper offshore platform. The biggest enemy of the safe service of the riser in the wave current environment is the vortex-induced vibration, especially the resonance caused by the shedding frequency of the vortex formed by the seawater flow is close to the natural frequency of the marine riser, which accelerates the fatigue damage of the marine riser. [0003] At present, under the long-term action of environmental loads on the deep-sea risers used in deep-sea mining on the market, when the fr...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a deep-sea riser for preventing vortex-induced vibration for the development of deep-sea resources, which solves the technical problem that the existing deep-sea riser is prone to vortex-induced vibration

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