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Natural gas blowout-control and flow-guiding device

A technology of natural gas and liquid inlet holes, which is applied to wellbore/well valve devices, wellbore/well components, earthwork drilling and production, etc., which can solve problems such as blowout and difficult high-pressure oil and gas lamination well operations, and avoid Well control disorder, reduce the probability of occurrence, reduce the effect of blowout

Inactive Publication Date: 2016-10-12
CHENGDU GUOGUANG ELECTRONICS INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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Embodiment 1

[0022] like Figure 1~3 As shown, this embodiment includes a body 1, a support plate 9, a sphere 5 and an upper ball seat 13, and a liquid inlet 3 is opened inside the body 1, and the support plate 9 is fixed on the lower part of the liquid inlet 3, and the upper The ball seat 13 is fixed on the upper part of the liquid inlet hole 3 and its inside is connected with the liquid inlet hole 3. A support shaft 8 is arranged in the middle part of the support plate 9. The spring 7 is sleeved on the support shaft 8. There are a plurality of The small hole 10, the top of the spring 7 is provided with a limit plate 16, and there is a gap between the bottom of the limit plate 16 and the top of the support shaft 8, the upper end of the support shaft 8 is provided with an elastic cone point 18, and the bottom surface of the limit plate 16 is embedded with The rubber block 17 facing the conical point 18, the lower ball seat 6 is fixed on the limit plate 16, a spherical blowout prevention ca...

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Abstract

The invention discloses a natural gas blowout-control and flow-guiding device which comprises a body, a supporting plate, a ball and an upper ball seat. A liquid inlet is formed in the body, the supporting plate is fixed to the lower portion of the liquid inlet, and the upper ball seat is fixed on the upper portion of the liquid inlet and internally communicates with the liquid inlet. A supporting shaft is arranged in the middle of the supporting plate and sleeved with a spring. The supporting plate is provided with a plurality of small holes, a limiting plate is arranged at the top end of the spring, and a clearance is reserved between the bottom of the limiting plate and the top end of the supporting shaft. An elastic conical tip is arranged at the upper end of the supporting shaft, and a rubber block right facing the conical tip is embedded in the bottom face of the limiting plate. A lower ball seat is fixed to the limiting plate. A through hole communicating with the liquid inlet is formed in the middle of the ball. A connecting shaft is rotatably arranged in a sleeve, and one end of the connecting shaft is connected with the upper portion of the ball. An adjusting mechanism is used for adjusting the size of a communication section of the liquid inlet, so that oil gas fleeing upwards is blocked, well mouth overflowing or expansion of a well kick accident caused by upward oil gas fleeing is prevented, and well control disorder is avoided.

Description

technical field [0001] The invention relates to the field of natural gas exploitation, in particular to a natural gas blowout prevention and diversion device. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/02E21B21/10
CPCE21B21/10E21B34/02E21B2200/04
Inventor 吕忠贵
Owner CHENGDU GUOGUANG ELECTRONICS INSTR
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