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Liner hanger and anti-abrasion sealing structure thereof

A liner hanger and sealing structure technology, which is applied in engine sealing, wellbore/well components, earthwork drilling and production, etc., can solve problems such as sealing box failure, construction accidents, and large impact on sealing parts, so as to prevent sealing failure accidents, enhance sealing reliability, and improve the effect of temperature and pressure bearing capacity

Active Publication Date: 2021-01-22
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experiments have shown that under ultra-high temperature conditions, the rotation of metal parts in contact with the seal has a great impact on the seal, which can easily cause damage to the seal, invalidate the seal box, and cause construction accidents

Method used

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  • Liner hanger and anti-abrasion sealing structure thereof
  • Liner hanger and anti-abrasion sealing structure thereof
  • Liner hanger and anti-abrasion sealing structure thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 A structural schematic diagram showing the anti-wear sealing structure of the liner hanger according to an exemplary embodiment of the present invention, figure 2 show figure 1 A partial enlarged view of the positioning mechanism in , image 3 show figure 1 A partial enlarged view of the sealing mechanism in .

[0025] In an exemplary embodiment of the present invention, as figure 1 , figure 2 and image 3 As shown, the anti-wear sealing structure of the liner hanger includes a positioning mechanism 1 and a sealing mechanism 2 . The positioning mechanism 1 includes a shrapnel screw 1a, a positioning claw screw 1b, a shrapnel 1c, and a positioning claw 1d; the sealing mechanism 2 includes a first inner seal 2a, a first sealing box body 2b, a first outer seal 2c, and a variable diameter sealing tube 2d , the second inner seal 2e, the second sealed box body 2f and the second outer seal 2g.

[0026] Wherein, the positioning mechanism 1 is arranged on the ...

Embodiment 2

[0036] In another exemplary embodiment of the present invention, on the basis of the anti-wear sealing structure of the liner hanger including the structures of the above exemplary embodiments, the first sealing box and the second sealing box can also be combined to form a third Sealed box. That is to say, the first sealed box and the second sealed box can be integrally processed and manufactured into a new longer sealed box, that is, the third sealed box. The outer seal of the third hermetic box may be any one of the first outer seal of the first hermetic box or the second outer seal of the second hermetic box. In an assembled state, a part of the third sealing box is located in the first annular space, and another part is located in the second annular space. That is to say, a part of the third sealing box is located in the annular space between the upper section with the smaller outer diameter of the variable diameter sealing tube and the inner wall of the hanger body, and ...

Embodiment 3

[0039] In yet another exemplary embodiment of the present invention, the interior of the liner hanger includes the anti-wear sealing structure described in any one of the above exemplary embodiments. The liner hanger has good sealing effect and good temperature and pressure resistance (for example, temperature resistance of 150° C. and pressure resistance of 70 MPa), and can be used in both high temperature and low temperature environments.

[0040] In summary, the present invention can achieve different sealing purposes. Before the hanger is lost, the second sealing box plays a sealing role. After hand, both the first sealing box and the second sealing box can play a sealing role, even if the second sealing box is damaged due to rotational friction, the sealing function of the hanger will not be affected. The invention can protect the sealing box of the liner hanger, improve the temperature resistance and pressure bearing capacity (for example, temperature resistance 150°C, p...

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Abstract

The invention provides a liner hanger and an anti-abrasion sealing structure thereof, the anti-abrasion sealing structure comprises a positioning mechanism located at the upper end of a hanger feedingtool and a sealing mechanism located at the lower end of the hanger feeding tool, the positioning mechanism is provided with an expanding part capable of expanding in the radial direction of the feeding tool after moving upwards to exceed a horn upper end opening, the radial size of the expanded positioning mechanism is greater than that of the horn upper end opening, the sealing mechanism comprises a reducing sealing pipe, a first sealing box and a second sealing box, the outer diameter of the upper section of the reducing sealing pipe is smaller than that of the lower section, in the assembling state, the first sealing box is located in a first annular space between the upper section and a hanger body, the second sealing box is located in a second annular space between the lower sectionand the hanger body, the second sealing box can seal the second annular space. and when the positioning mechanism moves upwards to the horn upper opening, the first sealing box can seal the second annular space. According to the liner hanger and the anti-abrasion sealing structure thereof, the sealing boxes of the liner hanger can be protected, sealing pieces are prevented from being abraded by rotation, and the sealing reliability of the liner hanger is enhanced.

Description

technical field [0001] The invention relates to the technical field of liner suspension equipment for oil and gas field drilling operations, in particular to a liner hanger and an anti-wear sealing structure thereof. Background technique [0002] The seals of the ultra-high temperature liner hanger are faced with an extremely harsh working environment, and all seals are required to withstand the high temperature, high pressure, and corrosive working fluid environment containing tiny solid particles in the downhole of oil and gas wells. The seal box used to seal the annulus between the hanger running tool and the hanger body also needs to withstand rotational wear of the seal location metal parts under high temperature conditions. Experiments have shown that under ultra-high temperature conditions, the rotation of metal parts in contact with the seal has a great impact on the seal, which can easily cause damage to the seal, invalidate the seal box, and cause construction acci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B23/01F16J15/16
CPCE21B23/01F16J15/16
Inventor 刘运楼唐欣张毅超刘世彬杨凯凌王娟李定夏
Owner BC P INC CHINA NAT PETROLEUM CORP