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A jet-type active drive device for vortex-induced vibration of standpipe

An active drive, vortex-induced vibration technology, applied in the direction of drill pipe, casing, pipe components, etc., can solve secondary disasters, huge economic losses, marine pollution and other problems

Active Publication Date: 2019-03-26
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Once the riser is damaged, it will cause huge economic losses and cause serious marine pollution and secondary disasters.

Method used

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  • A jet-type active drive device for vortex-induced vibration of standpipe

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Embodiment Construction

[0007] Such as figure 1 As shown, the perforated steel pipe 1 is connected to the standpipe 8 through the metal ferrule 6 arranged along the length, the perforated steel pipe 1 is in the direction of the incoming flow, the air injection holes 2 are all facing the direction of the incoming flow, and two groups are arranged along the upper part and the middle span of the standpipe The pressure sensor 4 is connected to the control computer 5, the control end of the high-pressure air pump 3 is connected to the control computer 5, and the output end is connected to the perforated steel pipe 1 through the booster valve 7. When there is ocean current or wave passing through the standpipe, the pressure sensor 4 transmits the signal to the control computer 5. When the pressure signal exceeds the set value, the control computer 5 automatically turns on the high-pressure air pump 3 and inputs the rated power according to the pressure signal value. Air pressure, the air pressure sprays hi...

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Abstract

The invention belongs to the technical field of marine engineering, and relates to a jet-type active driving device for vortex-induced vibration of a standpipe. The device includes a perforated steel pipe, a metal ferrule, a high-pressure air pump, a booster valve, a pressure sensor, and a control computer. The perforated steel pipe is connected to the standpipe through a metal ferrule and arranged parallel to the standpipe. The perforated steel pipe is installed on the standpipe to flow to one side. The top of the steel pipe is connected with a booster valve and a high-pressure air pump, and two sets of pressure sensors are arranged along the surface of the steel pipe, and the pressure sensor and the control end of the high-pressure air pump are respectively connected with the control computer. When ocean currents or waves pass through the standpipe, the pressure sensor transmits the signal to the control computer. When the pressure signal exceeds the set value, the control computer automatically turns on the high-pressure air pump, outputs high-pressure airflow and sprays it through the opening of the steel pipe, and the airflow can be effectively Disturb currents and waves, and reduce the amplitude of vortex-induced vibration of the riser.

Description

technical field [0001] The invention belongs to the field of vibration suppression of marine risers, and in particular relates to a jet-type active drive device for vortex-induced vibration of risers. Background technique [0002] The offshore riser is an important part of the deep-sea oil and gas field development system, and it is the connecting pipeline between the offshore platform and the subsea wellhead. The vortex-induced vibration generated under external environmental loads such as waves and ocean currents is the main cause of fatigue failure of risers. Once the riser is damaged, it will cause huge economic losses and lead to serious marine pollution and secondary disasters. Therefore, in the design of risers, how to reduce the amplitude of vortex-induced vibration and prolong the fatigue life of marine risers is a hot spot in the engineering circles of various countries. At present, the main method in the world is to add a vibration suppression device outside the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/01F16L55/04
CPCE21B17/01F16L55/041
Inventor 李朋张宪堂郑鸿飞王飞张永波
Owner SHANDONG UNIV OF SCI & TECH
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