Natural gas blowout-prevention flow guide valve

Abstract

The invention discloses a natural gas blowout prevention diverter valve, which comprises a body, a support plate, a sphere and an upper ball seat, a liquid inlet hole is opened inside the body, the support plate is fixed at the lower part of the liquid inlet hole, and the upper ball seat is fixed at the liquid inlet hole The upper part and its interior are connected with the liquid inlet hole. A support shaft is set in the middle of the support plate. The spring is sleeved on the support shaft. There are many small holes on the support plate. There is a gap with the top of the support shaft, the lower ball seat is fixed on the limit plate, and a through hole connected with the liquid inlet hole is opened in the middle of the sphere; the connecting shaft is rotated and set in the sleeve, and the end of the connecting shaft is connected to the upper part of the sphere . By adjusting the size of the connecting section of the liquid inlet hole through the adjustment mechanism, the oil and gas flowing upwards are blocked, preventing wellhead overflow or expansion of well kick accidents caused by the upward movement of oil and gas flow, and avoiding the occurrence of well control disorders.

Description

technical field [0001] The invention relates to the field of natural gas exploitation, in particular to a natural gas blowout prevention diversion valve. Background technique [0002] During the drilling operation of natural gas well production, formation fluid (oil, gas and water) inevitably enters the wellbore. Generally, the formation fluid entering the wellbore is pressed into the well by heavy mud through the kill manifold. When drilling into an oil and gas formation with abnormal high pressure, the oil flow in the high pressure oil and gas formation moves upwards under the pressure and drives the mud to the wellhead together. The upward movement of the oil flow causes drilling failure. Otherwise, the well control will be out of control. Usually, it is easy to cause a blowout accident, and the well killing operation of the high-pressure oil and gas layer is not easy to carry out, which disturbs the normal operation of drilling and production operations. Contents of th...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a natural gas blowout prevention diversion valve, which solves the problems in the prior art that easily cause blowout and difficult to carry out well killing operations of high pressure oil and gas formations when drilling into abnormally high pressure oil and gas formations.

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