Sand prevention water injection packer

A packer and sand control technology, applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve problems such as well stuck accidents, packer damage, and large well washing resistance

Inactive Publication Date: 2009-03-25
胡振明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of sand sticking in the existing water injection packer, well jamming accidents when unsealing, water injection string peristalsis caused by changes in water injection pressure, and damage to the packer due to small well washing channels and large well washing resistance Insufficient, the present inve

Method used

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  • Sand prevention water injection packer

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0011] In the embodiment shown in FIG. 1 , the central pipe 2 has external threads at both ends and the middle and lower parts, and has pressure transmission holes Φ4 and round holes at the middle and lower parts. Slip telescoping sleeve 4 is that one end internal diameter is small and has internal thread, and the middle internal diameter is big, and the internal diameter of the other end is less than the internal diameter of the middle part, and its transition section is the bell mouth of internal cone surface, and the end is external conical surface. The main body of the anchor 5 has internal threads at both ends, and the outer circle of the middle part is vertically symmetrical with two sides being straight faces, and the two ends are trapezoidal grooves with an outer conical inclined plane. Slips 6 are planes on both sides, with clamping teeth on th...

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PUM

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Abstract

The invention relates to a sand-prevention water-injection packer for injecting water into a petroleum extracting well. The technical proposal is that the packer consists of an upper joint, a central tube, a pressure cap, a slip telescopic sleeve, an anchor body, a slip, a slip shrink sleeve, a sand blocking cap, a reducer union, a tubing assembly, a sleeve, an O-shaped ring, a flushing valve, a piston, a cylinder, a self-locking tube, a self-locking sleeve, a shear pin and a lower joint which are connected in sequence. The sand blocking cap, a fluke compulsory contraction mechanism, a large flushing channel and a flushing switch are arranged in the sand-prevention water injection packer to block sand which deposits on the upper part of the packer, thereby preventing the sand from entering a cavity inside the packer, avoiding the occurrence of accidents that the water-injection packer is occasionally subjected to sand blocking and well blocking during deblocking so as to reduce accident loss. The packer can fulfill the requirements of normal water injection of a separated injection well and large-discharge reversely flushing. When disanchoring and deblocking are required, a pipe column is lifted to cut off the shear pin, a contracting claw of the slip is compulsorily pulled, pressed and contracted by the slip telescopic sleeve and the slip shrink sleeve to smoothly realize deanchoring, meanwhile, the tubing assembly of the packer is contracted and deblocked.

Description

technical field [0001] The invention relates to a downhole tool used for water injection in an oil production well, in particular to a sand control water injection packer capable of preventing sand and jamming and having a large well washing channel. Background technique [0002] In order to solve the problem of layered water injection and well flushing of water injection wells in oil production, scientific and technical personnel in the oil production industry have successively developed lift-and-set water injection packers and hydraulic-set water injection packers, and developed different types of water injection packers. Unpack the washable water injection packer. Although these water injection packers have played the role of layered water injection and unblocking and flushing of wells, due to their own structure and function limitations, coupled with pressure changes, water injection strings creep, sand production in wells, and water quality corrosion sometimes occur. T...

Claims

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Application Information

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IPC IPC(8): E21B33/127
Inventor 胡振明温哲豪欧连贵
Owner 胡振明
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