An erosion-resistant normally open internal blowout preventer

A normally open, internal blowout prevention technology, applied in wellbore/well valve devices, wellbore/well components, buildings, etc., can solve problems such as damage to the sealing surface and reduce the degree of erosion of the sealing surface Achieve the effect of prolonging the service life, preventing direct erosion, and ensuring the service life

Active Publication Date: 2022-07-22
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an erosion-resistant normally open internal blowout preventer, one of the technical problems to be solved is that the sealing surface of the existing internal blowout preventer is easily damaged and invalidated, so as to ensure the normally open operation of the internal blowout preventer Under the premise of reducing the erosion degree of the sealing surface and prolonging the service life of the inner blowout preventer

Method used

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  • An erosion-resistant normally open internal blowout preventer
  • An erosion-resistant normally open internal blowout preventer
  • An erosion-resistant normally open internal blowout preventer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] like Figure 1 to Figure 4 The shown erosion-resistant normally-open internal blowout preventer includes a valve body 1, an upper valve seat 2, a lower valve seat 3 fixed in the valve body 1, and a sliding valve slidably fitted in the upper valve seat 2. Sleeve 4, the valve core 5 fixed under the sliding sleeve 4, the upper valve seat 2 and the lower valve seat 3 both have overflow passages, and a first elastic member 6, A second elastic member 7 is arranged between the bottom of the valve core 5 and the top of the lower valve seat 3, a number of leakage channels 8 are provided on the side wall of the sliding sleeve 4, a first sealing surface 9 is provided at the bottom of the inner side wall of the upper valve seat 2, and the outer wall of the valve core 5 is provided The second sealing surface 10 is matched with the first sealing surface 9, and the second sealing surface 10 is located below the leakage channel 8; the first sealing surface 9 and the second sealing surf...

Embodiment 2

[0071] A corrosion-resistant normally open internal blowout preventer, on the basis of Example 1, the valve core 5 is as follows: Figure 6 to Figure 8 As shown, it includes a raised portion 501, a connecting portion 502, and a sealing portion 503 distributed in sequence from top to bottom;

[0072] The surface of the raised portion 501 is set as a curved surface extending outward from top to bottom;

[0073] The connecting portion 502 is used for fixed connection with the sliding sleeve 4;

[0074] The outer surface of the sealing portion 503 is the second sealing surface 10 .

[0075] The outer wall of the connecting portion 502 is provided with a first external thread 504, an annular step 505 is formed between the top surface of the sealing portion 503 and the bottom surface of the connecting portion 502;

[0076] like Figure 9 and Figure 10 As shown, the inner wall of the sliding sleeve 4 is provided with a first inner thread 506 matching the first outer thread 504 ,...

Embodiment 3

[0080] An erosion-resistant normally open internal blowout preventer, on the basis of any of the above-mentioned embodiments,

[0081] Upper seat 2 such as Figure 11 and Figure 12 As shown, the top surface is provided with a first guide slope 201 inclined inward from top to bottom, and the outer surface of the upper valve seat 2 is sequentially provided with a drag reduction notch 202, a second external thread 203, and a first sealing ring assembly from top to bottom. The groove 204; the inner wall of the valve body 1 is provided with a second internal thread 101 matching the second external thread 203.

[0082] Lower seat 3 such as Figure 13 As shown, the top surface is provided with a second guide slope 301 inclined inward from top to bottom, and the outer side of the lower valve seat 3 is sequentially provided with a second sealing ring assembly groove 302 and a third external thread 303 from top to bottom; the valve body 1. The inner wall is provided with a third inn...

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PUM

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Abstract

The invention discloses an erosion-resistant normally open internal blowout prevention valve, comprising a valve body, an upper valve seat and a lower valve seat fixed in the valve body, a sliding sleeve slidingly fitted in the upper valve seat, and a sliding sleeve fixed in the upper valve seat. The valve core under the sliding sleeve, the upper valve seat and the lower valve seat both have flow passages, a first elastic piece is arranged between the top of the sliding sleeve and the inner top surface of the upper valve seat, and a first elastic piece is arranged between the bottom of the valve core and the top of the lower valve seat The second elastic member, the side wall of the sliding sleeve is provided with a number of leakage channels, the bottom of the inner side wall of the upper valve seat is provided with a first sealing surface, the outer wall of the valve core is provided with a second sealing surface matching the first sealing surface, and the second sealing surface is located in the drain Below the flow channel; when there is no external force, the first sealing surface is not in contact with the second sealing surface. One of the technical problems solved by the present invention is that the sealing surface of the existing inner blowout preventer is easily damaged and fails, so that the erosion degree of the sealing surface can be reduced and the inner blowout preventer can be extended under the premise of ensuring the normally open operation of the inner blowout preventer. purpose of service life.

Description

technical field [0001] The invention relates to the field of petroleum engineering, in particular to an erosion-resistant normally open internal blowout prevention valve. Background technique [0002] The blowout preventer in the drilling tool is one of the commonly used tools in the drilling process of oil and gas development. Its main function is to prevent the fluid in the well from returning through the drill pipe channel and cause accidents when overflow, kick, blowout and other dangerous conditions occur. Difficulty intensifies. The traditional blowout preventer in drilling tools is represented by normally closed float valve and arrow valve. However, the normally closed inner blowout preventer will cause the pressure difference between the two ends of the blowout preventer to be too large during the drilling process, increasing the drilling resistance. , resulting in the valve being easily damaged. For this reason, regular grouting is required during the drilling proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/08
CPCE21B34/08E21B2200/06E21B2200/02
Inventor 胡刚徐简繁王国荣廖红林敬佳佳吴文勇钟林
Owner SOUTHWEST PETROLEUM UNIV
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