Float barrel spiral strake vortex-induced vibration suppression device

Abstract

The invention discloses a buoy spiral strake vortex-induced vibration suppression device, and relates to the technical field of marine risers, the device comprises a spiral strake, an upper buoy, a lower buoy, a hinge and a fixing plate, the fin height of the spiral strake is 0.25 times of the diameter of the riser, and the screw pitch is 17.5 times of the diameter of the riser. And the section is triangular. The buoys are semi-cylindrical, are integrally formed with the spiral strake, are divided into an upper buoy and a lower buoy, are connected through a hinge, and can be freely opened and closed. And the fixing plates are respectively arranged on the float bowls and are fastened on the marine riser through matching of bolts and nuts. According to the novel vortex-induced vibration suppression device, the buoy and the spiral strake are combined to form the novel vortex-induced vibration suppression device, in the lazy wave-shaped marine riser, vortex-induced vibration can be well suppressed while the function of the buoy is achieved, the stability of the lazy wave-shaped marine riser is guaranteed, the service life of the riser is prolonged, and the economic effect of the lazy wave-shaped marine riser is improved. The device is simple in structure and convenient to install, the buoy can be freely opened and closed, the device can adapt to different installation environments, installation is easy and convenient, and manpower and material resources are saved to the maximum extent. And the detachable fixing plate is arranged, so that the maintenance is more convenient.

Description

technical field [0001] The invention relates to the technical field of marine risers, in particular to a vortex-induced vibration restraining device of a buoy helical strake with buoyancy and capable of effectively restraining vortex-induced vibration. Background technique [0002] Oil and natural gas are the lifeblood of a country, and the depletion of land and offshore oil and natural gas resources has become a key factor hindering my country's development. Deep-sea oil and gas resources account for more than 60% of the world's oil and gas reserves, and the development of offshore oil and gas resources has become a major national development strategy. The exploitation of deep-sea resources requires a large drilling platform, and the marine riser is the only channel connecting the platform and the oil and gas wellhead. The riser is directly in the complex and harsh environment of the ocean, and the vibration caused by ocean currents and waves induces the riser to produce vo...

AI Technical Summary

Problems solved by technology

However, the buoys are also cylindrical, and vortex-induced vibrations will also be generated in complex ocean environments, and adding buoys will increase the diameter of the riser itself, which will lead to enhanced vortex-induced vibrations at the buoys

At present, no device for suppressing vortex-induced vibration of buoys has been invented. With the widespread use of lazy wave risers in engineering, the problem of combining buoys with spiral strakes deserves attention

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