Compression type packer

A technology of compression packer and seat seal, which is applied in the field of isolation devices for sealing off various oil layers or tubing and casing of oil and gas wells. Sensitive action, convenient processing, and the effect of reducing construction accidents

Inactive Publication Date: 2008-04-23
刘宜贵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of the above-mentioned compression packer, such as unsmooth unsealing, easy jamming, and inability to force unsealing during op

Method used

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  • Compression type packer
  • Compression type packer
  • Compression type packer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like Figures 1 to 3 As shown, the compression packer includes an upper joint 1 , a well flushing mechanism, a rubber cartridge sealing mechanism, a seat sealing mechanism and a lower joint 15 . The seat seal mechanism includes a lock sleeve 8, a lock ring 9, a wedge-shaped lock block 10, a lock ring seat 7, and a central tube 12. The outer cylindrical surface of the lower end of the lock ring seat 7 is provided with a ring groove, and the lock ring 9 is installed in the ring slot. The annular groove is provided with several waist holes communicating with the inner side, each waist hole is equipped with a lock block 10, the lock ring is 9 split rings, and the outer peripheral surface of the lock ring 9 is provided with one-way locking annular teeth, The lock sleeve 8 is provided with an annular tooth 11 that cooperates with the annular teeth of the lock ring 9, the lower end of the lock ring 9 is provided with an inner conical surface at the contact portion with the low...

Embodiment 2

[0031] Another solution of the present invention is as Figures 6 to 8 As shown, the same parts as those in Embodiment 1 will not be described here again. There is an annular boss 28 on the central tube 12 that matches the inner wall of the lock block 10 . The lower end of the boss 28 is provided with two upper and lower steps 25 and 26 that cooperate with the step 24 at the middle part of the inner side of the lock block 10 . Before and after the seat seal, the upper step 25 at the lower end of the boss 28 cooperates with the step 24 on the lock block 10, see Figure 8 and Figure 9 . When unsealing, lift the central tube, the lower step 26 at the lower end of the boss 28 cooperates with the step 24 on the lock block 10, see Figure 10 At this time, the lower end of the step 24 of the lock block is embedded in the annular groove 27 at the lower end of the central tube boss 28, the lock sleeve 8 compresses the lock ring 9 and shrinks to make the lock block 10 move radially ...

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Abstract

The compressed packer has one seat sealing mechanism comprising one locking sleeve, one locking ring, one locking ring seat and one central pipe. Inside the locking ring seat, there are wedged locking blocks with outer surface matching the inner conic surface of the locking ring, locking block support sleeve to hold the locking blocks inside the holes of the locking ring seat, return springs, and limit stops. The central pipe has steps for pushing the limit stops to shift upwards. The compressed packer has rigid wedged locking block to replace elastic support pawls, and possesses stable and reliable seat sealing, flexible smooth and reliable locking block desterilizing, and flushing path between the central pipe and the locking block support sleeve for flushing job.

Description

technical field [0001] The invention relates to a packing device for packing oil layers or tubing casings of oil and gas wells during the exploration and development of oil and gas fields, in particular to a compression packer which is stable in setting and unblocking completely. Background technique [0002] At present, there is a known compression packer, the seat sealing mechanism includes a lock sleeve, a lock ring, a lock ring seat, an elastic support claw, and a central tube. In the axial groove of the lock ring seat, there is a ring groove on the outer cylindrical surface of the lower end of the lock ring seat, and the lock ring is installed in its annular groove. The annular groove is provided with a waist hole communicating with the inner axial groove. The central tube and the elastic support The contact part of the claw is provided with an outwardly protruding annular boss, which presses the end of the elastic supporting claw into the waist hole of the lock ring se...

Claims

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Application Information

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IPC IPC(8): E21B33/128
Inventor 刘宜贵
Owner 刘宜贵
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