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Anti-corrosion diversion structure

A technology of diversion holes and blowout prevention, which is applied in wellbore/well components, earthwork drilling, construction, etc. It can solve problems such as difficult high-pressure oil and gas formation well operations, so as to avoid well control imbalance, reduce impact, and reduce impact. The effect of load strength

Inactive Publication Date: 2016-08-10
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 an anti-corrosion diversion structure, which solves the problems in the prior art that easily cause blowout and difficult to kill wells 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

[0023] Such as 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...

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Abstract

The invention discloses an anti-corrosion diversion structure which comprises a body, a support plate, a spherical body and an upper spherical base, wherein a liquid inlet is formed in the body; the support plate is fixed at the lower part of the liquid inlet; the upper spherical base is fixed at the upper part of the liquid inlet and the interior of the upper spherical base is communicated with the liquid inlet; the middle of the support plate is provided with a support shaft; a spring sleeves the support shaft; the support plate is provided with multiplea plurality of small holes; the top end of the spring is provided with a limit plate; a clearance gag gap is reserved between the bottom of the limit plate and the top end of the support shaft; a lower spherical base is fixed to the limit plate; the middle of the spherical body is provided with a through hole communicated with the liquid inlet; a connecting shaft is rotatably arranged in a sleeve; the end part of the connecting shaft is connected with the upper part of the spherical body. The communication section size of the liquid inlet is adjusted by virtue of an adjustment mechanism, ascending oil gas is blocked, so that an extensification of a wellhead overflow or well kick accident caused by oil gas ascending is prevented, and the occurrence of well control maladjustment is avoided.

Description

technical field [0001] The invention relates to the field of natural gas exploitation, in particular to an anti-corrosion diversion structure. 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 the invention...

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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