Thick-oil thermal recovery device in oil fieldSelf-sealing type thermal recovery packer.

A packer and thermal recovery technology, which is applied in the directions of sealing/isolation, earthwork drilling, wellbore/well parts, etc., can solve problems such as troublesome operation, complex structure, well stuck accidents, etc., and achieve safe and reliable use and excellent operation Simple, short setting time results

Inactive Publication Date: 2013-03-06
CNPC BOHAI EQUIP MFG
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  • Abstract
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AI Technical Summary

Problems solved by technology

It overcomes the disadvantages of existing packers such as complex structure, long size, troublesome operation, and prone to well jamming accidents

Method used

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  • Thick-oil thermal recovery device in oil fieldSelf-sealing type thermal recovery packer.

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Embodiment Construction

[0009] As shown in the attached figure, a self-sealing thermal recovery packer includes an upper joint 1, a central pipe 6 and a lower joint 9; the upper joint 1, the central pipe 6 and the lower joint 9 are connected sequentially from top to bottom, and the cylinder liner 5 is set on the central tube 6 and fixed by pin connection. The interior of the cylinder liner 5 is filled with expansion liquid. The lower end of the cylinder liner 5 is sealed by the sealing head 7 and the double pressure cap 8. The assembly 3 is installed on the outer side of the sliding locking device 4 and the inner side of the lower end of the support ring 2 . The outer sealing assembly 3 adopts a leather cup structure.

[0010] The present invention adopts a hydraulic power-assisted setting seal. When the temperature rises to 200°C, the expansion liquid in the cylinder liner 5 expands and gasifies, pushing the cylinder liner 5 upward to cut off the control pin, and prompting the movable slider in the ...

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Abstract

The invention relates to a thick-oil thermal recovery device in an oil field, in particular to a self-sealing type thermal recovery packer. The thick-oil thermal recovery deviceself-sealing type thermal recovery packer. is characterized in that an upper joint, a central pipe and a lower joint are connected in sequence from top to bottom; a cylinder sleeve is sheathed on the central pipe and is fixedly connected with the central pipe by a pin; expanding liquid is filled in the cylinder sleeve; the lower end of the cylinder sleeve is sealed by a sealing head and a double-pressing cap; the upper end of the cylinder sleeve is provided with a sliding and locking device; and an outer sealing assembly is arranged at the outer side of the sliding and locking device and the inner side of the lower end of a supporting ring. The thick-oil thermal recovery deviceself-sealing type thermal recovery packer. has the advantages that automatic setting is realized, the setting time is short, the setting is durable, the structure is compact, the sealing is excellent, the unsealtting is smooth, the production and operation cost is reduced, and the defects of complex structure, longer size, troublesome operation and easy well blocking in the existing packer are overcome.

Description

Technical field: [0001] The invention relates to an oil field heavy oil thermal recovery device, in particular to a self-sealing thermal recovery packer. Background technique: [0002] In the steam injection production of heavy oil, thermal recovery packers are widely used. At present, there are mainly two kinds of compression type and expansion type. The compression type is mainly fixed by single slip or double slip, with complex structure and long size. The well conditions and casing requirements are strict, the rotary setting is complicated, the setting force and telescoping distance are difficult to control, the cost of hydraulic setting operation increases, and the time is long. The expansion type adopts a heat-sensitive structure. The main principle is to use the different thermal expansion coefficients of bimetals. When the downhole temperature reaches 200°C, a deflection and deformation will occur to expand the rubber sleeve to seal the oil casing annulus. Well stic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/12
Inventor 刘文科雷广财郭利王玉才朱进礼魏永捷
Owner CNPC BOHAI EQUIP MFG
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