Active and passive control synergistic stand pipe vibration abatement device and method

Abstract

The invention relates to an active and passive control synergistic stand pipe vibration abatement device and method. The active and passive control synergistic stand pipe vibration abatement device is composed of two symmetrical upper rotation component and lower rotation component, a short separating disc, a long separating disc, two control rods with left hand spiral ribs and two control rods with right hand spiral ribs. When seawater impacts the device, the four control rods with the spiral ribs can rotate around each own center shaft, energy is injected in a stand pipe streaming boundary layer, and the active control of the stand pipe vibration with no energy consumption is achieved. The short separating disc and the long separating disc split space of wake flow vortex development, the development of the wake flow vortex is further destroyed, and the passive control of the stand pipe vibration is achieved. The active and passive control synergistic stand pipe vibration abatement device overcomes the high energy consumption of the traditional active control and the oneness of the traditional passive control, the advantages of the active control and the advantages of the passive control are combined, and the stand pipe vibration can be effectively suppressed.

Description

technical field [0001] The invention belongs to the technical field of laying of marine riser facilities, and in particular relates to a riser vibration suppression device and method with active and passive control synergy. Background technique [0002] At present, my country's onshore oil and gas resources are in short supply, and the development of offshore oil and gas is not high enough, forcing the dependence on foreign oil and gas to increase steadily, and the energy crisis is highlighted. Therefore, vigorously developing offshore oil and gas, especially deep-sea oil and gas resources, is a key measure to reverse this situation. As the "life passage" of offshore platforms and underwater wellheads, whether the marine riser can work normally in the harsh marine environment is a key factor that determines the efficient and safe development of deep-sea oil and gas. When seawater flows through the riser, due to the separation of the boundary layer around the flow, alternate...

AI Technical Summary

Problems solved by technology

[0003] Existing marine riser vibration suppression devices are mainly divided into two types: active control and passive control. Among them, the active suppression device requires additional energy input, the connection is relatively complicated, and the working conditions are relatively harsh, but the suppression effect is obvious

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