Free-rotation impeller device for inhibiting eddy induced vibration of marine riser

Abstract

The invention relates to a free-rotation impeller device for inhibiting eddy induced vibration of a marine riser. The free-rotation impeller device consists of a plurality of basic elements, wherein the basic elements are serially connected along the axis direction of the marine riser, each basic element comprises two rotary modules and an impeller module, each rotary module consists of an inner circle, a cylindrical roller and an outer circle, the impeller module is a whole body consisting of a sleeve and impeller blades and is processed by a plastic die, the upper end and lower end of the impeller module are respectively provided with one rotary module, the impeller module is sheathed on the outer circle of each rotary module, the inner circle of each rotary module and the marine riser are tightened and connected by a bolt, and the impeller module freely rotates around the marine riser by the rotary modules. The free-rotation impeller device has the advantages that the structure is simple, the performance is reliable, the on-site installation is convenient, the free rotation is realized, the eddy induced vibration caused by flows from any direction can be effectively inhibited, and the influence on the fatigue life of the marine riser is reduced.

Description

technical field [0001] The invention belongs to the technical field of laying marine riser facilities, and in particular relates to a freely rotatable impeller device for suppressing vortex-induced vibration of marine riser pipes. Background technique [0002] With the rapid development of the national economy, the demand for oil is becoming more and more significant. With the gradual depletion of onshore oil and gas, it has become an inevitable demand to vigorously exploit and develop offshore oil and gas. Ocean risers are an important part of offshore oil and gas drilling and production. As an important part of the subsea production system, its reliability in service is of great significance to the safe operation of oil and gas drilling and production. The environmental conditions of marine risers are harsh and the forces are complex. Especially when waves and currents flow through the standpipe, a vortex will be formed behind the standpipe. The formation and shedding of ...

AI Technical Summary

Problems solved by technology

At present, there are only publicity period patents CN 102071883 A (Vortex-induced vibration suppression device for underwater riser with rotatable fairing) and patent CN 102134972 A (Vortex-induced vibration device for underwater riser imitating fishtail fairing). The obtained device can realize the rotation around the standpipe, but it is still limited by the angle of the incoming flow, and cannot fully cope with the incoming flow at any angle.

Images