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Multi-stage heavy-duty swivel liner hanger

A liner hanger, heavy-duty technology, used in wellbore/well components, sealing/packaging, earth-moving drilling, etc., can solve problems such as high height, block recovery sealing box off-hand sealing failure, affecting sealing performance, etc. , to achieve the effect of improving cementing quality and improving displacement efficiency

Active Publication Date: 2015-08-19
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

In the currently used structure, the block directly acts on the sealing tube of the running tool. When sealing high pressure, the block is easy to press out a pit on the sealing tube of the running tool, which affects the sealing performance.
When judging the release of the hanger, the height of the lifting and feeding tool is too large, which will easily cause the block recovery seal box to fail to seal, resulting in failure of construction

Method used

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  • Multi-stage heavy-duty swivel liner hanger
  • Multi-stage heavy-duty swivel liner hanger
  • Multi-stage heavy-duty swivel liner hanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] As a preferred embodiment of the present invention, the present invention mainly includes a drill pipe 1 (here may be a short drill pipe), an upper joint 2, a torque cylinder 3, a double male joint 4, a claw block 5, a sealing box, a lower Joint 6, male and female joint 7, throw away mechanism, hollow rubber plug 18 and two carrying mechanisms. Wherein, the airtight box and the hand-losing mechanism can adopt the airtight box and the hand-losing mechanism in the prior art.

[0061] The first carrying mechanism includes a first heavy-duty bearing 8 , a first conjoined double cone 9 , a first conjoined double slip 10 , a first seated suspension cylinder 11 and a first center pipe 12 . The second carrying mechanism includes a second heavy-duty bearing 13 , a second conjoined double cone 14 , a second conjoined double slip 15 , a second seat suspension cylinder 16 and a second center pipe 17 .

[0062] The upper joint 2 is engaged with the meshing teeth on the upper end of...

Embodiment 2

[0066]As the best embodiment of the present invention: the present invention mainly includes a drill pipe 1 (short drill pipe), an upper joint 2, a torque cylinder 3, a double male joint 4, a claw block 5, a lower joint 6, and a male and female joint 7 , the first heavy-duty bearing 8, the first conjoined double cone 9, the first conjoined double slips 10, the first sitting and hanging liquid cylinder 11, the first central tube 12, the second heavy-duty bearing 13, the second connecting Body double cone 14, second conjoined double slips 15, second sitting and hanging liquid cylinder 16, second center pipe 17 and hollow rubber plug 18. The upper end of the short drill pipe 1 is provided with a drill pipe female thread to realize the connection with the drill pipe, and the lower end of the hanger is provided with a casing male thread to realize the connection with the liner. The claw block 5 is supported and stuck in the inner groove of the male and female joints 7 through the t...

Embodiment 3

[0071] As a preferred embodiment of the sealing box of the present invention, it includes a sealing box body 19 , a block 20 , a supporting inner sleeve 21 , a release control pin 22 and a protection joint 25 . The clamping block 20 is embedded in the lower part of the sealing box body 19, the support inner sleeve 21 is arranged inside the clamping block 20 and the sealing box body 19, and a release control pin 22 and a protection joint 25 are arranged between the sealing box body 19 and the supporting inner sleeve It is arranged at the lower end of the sealed box body 19 . The outer edge of the circumferential boss of the clamping block 20 is clamped in the inner groove of the joint between the male and female joints 7 and the first central pipe 12 . The sealing tube 27 of the running tool passes through the inside of the sealing box body 19 , and the lower end of the sealing tube 27 of the running tool is provided with a second lower joint 28 .

[0072] Such a structural fo...

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PUM

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Abstract

The invention discloses a multi-level heavy-load rotating tail pipe suspender. The multi-level heavy-load rotating tail pipe suspender comprises a drill stem, an upper joint, a sealing pipe, a sealing box, a double-male joint, a male and female joint, a lower joint and at least two levels of bearing mechanisms, wherein the drill stem, the upper joint, the double-male joint and the lower joint are sequentially connected through screw threads; the bearing mechanisms are mutually connected; each bearing mechanism comprises a seat hung hydraulic cylinder, two connected slips, two connected conical bodies, a heavy-load bearing and a central pipe; the seat hung hydraulic cylinder, the two connected slips, the two connected conical bodies and the heavy-load bearing of each bearing mechanism are sequentially arranged on a central pipe; the central pipe of the bearing mechanism adjacent to the male and female joint is connected with the lower end of the male and female joint; and the heavy-load bearing of the bearing mechanism adjacent to the male and female joint is positioned between the male and female joint and the two connected conical bodies. A tail pipe can be rotated when a pipe post downwards enters, and after a seat hanger of the suspender is separated from a releasing hand, the function that the heavy-load tail pipe rotates to fix a well can be realized due to the load bearing of the multi-level bearing.

Description

technical field [0001] The invention relates to a multi-stage heavy-duty rotary liner hanger, which belongs to the technical field of downhole tool manufacturing for oil and gas well cementing operations in oil and gas development. Background technique [0002] When performing liner cementing in the drilling process of complex wells such as deep wells, ultra-deep wells, highly deviated wells, horizontal wells and low-pressure leakage wells, dredge and stabilize the well to ensure that the casing runs smoothly to the designed position However, a large amount of well drilling, observation and mud treatment are often required, and a large amount of drilling time and cost are required. Even through careful well preparation and careful casing running measures, sometimes the liner string encounters midway. The card is blocked and cannot be lowered to the designed position. During cementing construction, for deep and ultra-deep wells, the pipe string has high frictional resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/01E21B33/10
Inventor 唐欣刘运楼周正李斌叶登胜
Owner BC P INC CHINA NAT PETROLEUM CORP