Natural gas blowout control diverter valve

Abstract

The invention discloses a natural gas blowout control diverter valve. The natural gas blowout control diverter valve comprises a body, a supporting plate, a ball body and an upper ball seat, wherein a liquid inlet hole is formed in the body; the supporting plate is fixedly arranged at the lower part of the liquid inlet hole; the upper ball seat is fixedly arranged at the upper part of the liquid inlet hole, and the inner part of the upper ball seat is communicated with the liquid inlet hole; a supporting shaft is arranged at the middle part of the supporting plate; a spring is arranged on a spring sleeves the supporting shaft in a sleeving way; a plurality ofmultiple small holes are formed in the supporting plate; a limiting plate is arranged on the top end of the spring; a gap is reserved between the bottom part of the limiting plate and the top end of the supporting shaft; a lower ball seat is fixedly arranged on the limiting plate; a through hole which is communicated with the liquid inlet hole is formed in the middle part of the ball body; a connecting shaft is rotationally arranged in a sleeve; the end part of the connecting shaft is connected with the upper part of the ball body. The size of a communicating cross section of the liquid inlet hole can be regulated through a regulating mechanism, so that an oil gas flowing upwards can be blocked, an expansion of a wellhead overflow or well kick accident caused by upward flowing of oil gas flow can be prevented, and maladjusted well control is prevented from happening.

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...

AI Technical Summary

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.

Images