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Erosion-resistant normally-open type inner blowout prevention valve

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

Active Publication Date: 2022-03-01
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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  • Erosion-resistant normally-open type inner blowout prevention valve
  • Erosion-resistant normally-open type inner blowout prevention valve
  • Erosion-resistant normally-open type inner blowout prevention valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Such as Figure 1 to 4 A normally open internal anti-spray valve shown, including a valve body 1, and a hover 2 fixed to the valve body 1, the lower valve seat 3, sliding in the upper valve seat 2 The sleeve 4 is fixed to the spool 5 below the slider 4, and the upper valve seat 2 is provided inside the lower valve seat 3 with an overflow channel, and the top of the top of the slider 4 is provided between the top surface of the upper side of the upper valve seat. A second elastic member 7 is disposed between the bottom of the spool 5 and the top of the lower valve seat 3, and a plurality of discharge passages 8 are opened in the sidewall of the slider 4, and the bottom portion of the upper portion of the upper seat 2 is provided with a first sealing surface 9, and the spool 5 is provided. The second sealing surface 10 that matches the first sealing surface 9, and the second sealing surface 10 is located below the discharge passage 8; the first sealing surface 9, the second se...

Embodiment 2

[0071] A normally open internal anti-spray valve, on the basis of Example 1, the spool 5 Figure 6 to 8 As shown, the convex portion 501, a connecting portion 502, and sealing portion 503 are included from the top and downward distribution.

[0072] The surface of the projection 501 is disposed to extend from the upper and downwardly extending surfaces;

[0073] The connecting portion 502 is used to securely connect with the slide 4;

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

[0075] Wherein, the outer thread 504 is provided with the outer thread 504, and the top surface of the sealing portion 503 is formed between the bottom surface of the connecting portion 502; the wall thickness of the slide 4 is less than or equal to the width of the annular step 505.

[0076] Such as Figure 9 and Figure 10 As shown, the inner wall of the slide 4 is provided with the first internal thread 506 that matches the first outer thread 504, and the firs...

Embodiment 3

[0080] A normally open internal anti-spray valve, based on any of the above embodiments,

[0081] Poard seat 2 Figure 11 and Figure 12 As shown, the top surface is arranged from the top-downwardly inclined first guide inclinement 201, and the upper side surface of the upper seat 2 is sequentially set up and downward, the second outer thread 203, the first sealing ring assembly Slot 204; the inner wall of the valve body 1 is provided with the second internal thread 101 that matches the second outer thread 203.

[0082] The lower valve seat 3 is Figure 13 As shown, on the top of the second guide bevel 301 inclined inwardly inwardly, the outer side surface of the lower valve seat 3 is sequentially set up, and the third outer thread 303; valve body 1 The inner wall is set to the third internal thread 102 that matches the third external thread 303.

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Abstract

The invention discloses an erosion-resistant normally-open type inner blowout prevention valve which comprises a valve body and further comprises an upper valve seat and a lower valve seat which are fixed in the valve body, a sliding sleeve arranged in the upper valve seat in a sliding fit mode and a valve element fixed to the lower portion of the sliding sleeve. A first elastic piece is arranged between the top of the sliding sleeve and the top face in the upper valve seat, a second elastic piece is arranged between the bottom of the valve element and the top of the lower valve seat, a plurality of drainage channels are formed in the side wall of the sliding sleeve, a first sealing face is arranged at the bottom of the inner side wall of the upper valve seat, and a second sealing face matched with the first sealing face is arranged on the outer wall of the valve element. The second sealing surface is positioned below the drainage channel; when no external force exists, the first sealing face does not make contact with the second sealing face. One of the technical problems solved by the invention is that the sealing surface of the existing inner blowout prevention valve is easy to damage and lose efficacy, and the aims of reducing the erosion degree of the sealing surface and prolonging the service life of the inner blowout prevention valve are fulfilled on the premise of ensuring the normally open work of the inner blowout prevention valve.

Description

Technical field [0001] The present invention relates to the field of petroleum engineering, and more particularly to a normally open internal anti-spray valve of aborgement resistance. Background technique [0002] The drill internal anti-spray valve is one of the common tools in the drilling process of oil and gas. Its main function is to prevent the inner fluid from returning to the accident treatment by the drill pipe passage when there is a dangerous working condition such as overflow, sleering, blowout. Difficulty intensifies. Conventional drill internal spray valve represents a normally closed float and arrow valve, but the normally closed internal anti-spray valve can cause excessive pressure difference between the air spray valve during the lower diamond process, increase the drilling resistance It causes the valve easy to be topped, and it needs to be seeded during the lower drill (the site is usually taken for 300m, which requires a sharp increase in the pressure differ...

Claims

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Application Information

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Patent Type & Authority Applications(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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