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Large-drift-diameter packer used for oil well

A packer and large-diameter technology, which is applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve the problem of rubber tubes prone to shoulders, unstable slip anchoring, complex mechanical structures, etc. problems, to achieve the effect of improving the sealing, anchoring and sealing actions are simple, coherent and easy to achieve

Inactive Publication Date: 2013-08-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many deficiencies in the existing packer research. The diameter of the central tube is too small, the mechanical structure is relatively complicated, the seal is not complete, the rubber tube is prone to shoulder protrusion after the force is applied, and the anchoring of the slips is unstable.

Method used

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  • Large-drift-diameter packer used for oil well
  • Large-drift-diameter packer used for oil well
  • Large-drift-diameter packer used for oil well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see figure 1 , a large-bore packer for oil wells, including a drop-off module 101 , a pack-off module 102 , an anchor module 103 and a lower joint module 104 . It is characterized in that: before the packer is set and anchored, the upper end of the drop-off module 101 is connected to the ground downhole device through pipe threads, and the lower end of the drop-off module 101 is connected to the lower joint through the isolation module 102 and the anchor module 103 in sequence. Modules 104 are connected in one piece.

Embodiment 2

[0034] see Figure 2~Figure 5 , the present embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0035] The hands-free module 101 includes a hands-free joint 1, a hands-free lock sleeve 2, a lock block 3 and a hands-free shear nail 4; the upper end of the hands-free joint 1 passes through 2 7 / 8The TBG pipe thread is connected with the surface downhole device, the locking sleeve 2 is covered with the locking joint 1, and is connected with the locking sleeve 2 in the middle through the locking block 3 and the locking shear nail 4, and the packer is set and sealed Continue to pressurize afterward, make the shear nail 4 be cut off, the lock sleeve 2 rises, the lock block 3 slides, the upper structure of the hand is proposed with the oil pipe, and the lower joint is connected with the central pipe 9.

[0036] The isolation module 102 includes a liquid cylinder 5, an upper inner ferrule 6, a locking ring sleeve 7, an upper locking ring 8, ...

Embodiment 3

[0044] see Figure 1~Figure 5 , a large diameter packer used for oil wells, the main parts of the isolation module include hydraulic cylinder 5, upper inner ferrule 6, lock ring sleeve 7, upper lock ring 8, center pipe 9, rubber sleeve thrust sleeve 10, setting seal Shear nail 11, limiting rubber tube 12, rubber tube spacer ring 13, rubber tube sliding sleeve 14, working rubber tube 15; the main parts of the anchor module include rubber tube seat 16, lower inner ferrule 17, lower locking ring 18, upper vertebra Body 19, slip tube 20, leaf spring 21, slips 22, lower vertebral body 23, limit sleeve 24.

[0045] In this embodiment, the packer is used in conjunction with a hollow oil well pump. When working, the lower joint of the packer and the upper joint of the pump barrel are connected through a 3-inch flat tubing buckle, and the seal is reliable. Connect the isolation anchor device with the oil well pump on the ground, and after lowering the isolation anchor device and the ...

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Abstract

The invention discloses a large-drift-diameter packer used for an oil well. The large-drift-diameter packer used for the oil well comprises a releasing module, a packing module, an anchoring module and a lower connector module. The releasing module is mainly formed by a releasing connector, a releasing lock sleeve, a locking piece and a releasing shear pin, after setting by the packer, pressurization is continued to shear off the releasing shear pin, a releasing sliding sleeve rises, the releasing locking piece slides off, and a releasing upper structure is lifted out along with an oil pipe. The packing module is mainly formed by a locking ring, a rubber barrel thrust sleeve, a rubber barrel, a rubber barrel lantern ring, a rubber barrel sliding sleeve, a rubber barrel base and other parts. The anchoring module is mainly formed by an upper cone, a lower inner cutting sleeve, a cava locking ring, a cava barrel, a cava, a leaf spring, a stop collar and a lower cone. The lower connector module mainly comprises a lower connecting sleeve, a deblocking shear pin and a lower connector. Compared with a traditional packer, the large-drift-diameter packer is combined with a large-stroke oil well pump for use, good in sealing performance and high in anchoring reliability.

Description

technical field [0001] The invention relates to a large-diameter packer for oil wells with double-rubber cartridges, which is suitable for relatively large-diameter oil wells and belongs to the technical field of petroleum machinery. Background technique [0002] The rise and development of the petroleum industry has led to the development of petroleum machinery and equipment. As the main tool in petroleum exploration and development, packers are also widely used in various fields of petroleum exploration technology, and their working performance directly affects the production cost. Therefore, it is of great significance to study packers with good sealing performance and reliable anchoring. [0003] A packer refers to a downhole tool that has elastic sealing elements to seal off the annular space and isolate the production layer to control the production fluid column and protect the casing. With the increasingly complex oil and gas production conditions and the continuous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/122
Inventor 周晓君段志明王剑刘吉成刘树林翟宇毅乔春德
Owner SHANGHAI UNIV
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