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Blowout prevention packer

A packer and blowout prevention technology, which is applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., to reduce the risk of pipe string slippage, prevent blowout hazards, and realize the effect of ultra-high pressure blowout sealing

Inactive Publication Date: 2017-07-11
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a blowout prevention packer in order to solve the problems of oil and gas production layer isolation and downhole blowout prevention

Method used

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Experimental program
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Effect test

Embodiment Construction

[0011] Such as figure 1 , figure 2 and image 3 As shown, a blowout prevention packer of the present invention is composed of an upper joint 1, a locking cylinder 2, a locking mandrel 3, a locking steel ball 4, a sliding pin 5, a locking spring 6, a pushing cylinder 7, an upper spacer ring 8, Connecting cylinder 9, oil seal mandrel 10, sealing rubber cylinder 11, lower spacer ring 12, anchor claw 13, cover plate 14, anchor cylinder 15, booster piston 16, return spring 17, sealing mandrel 18, sealing steel ball 19 , The ball seat 20 and the lower joint 21 are formed; its structural features are: the upper end of the upper joint 1 is connected with the upper pipe string screw, and the lower end of the lower joint 21 is connected with the lower drill string screw; the lower part of the outer circle of the upper joint 1 is set as a stepped shaft; The upper part of the locking cylinder 2 is evenly provided with three flow holes in the circumferential direction, the middle part o...

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Abstract

The invention relates to a blowout prevention packer applied to oil production engineering of petroleum and nature gas industry and solves the problems of packing of oil-gas production layer and downhole blowout prevention. The technical scheme adopted by the invention is as follows: a sliding pin is fixed in a pin hole in the lower part of a locking cylinder; locking steel balls are mounted in three through holes in the middle part of the locking cylinder; the upper end of a connection cylinder is in screwed connection with the lower end of the locking cylinder; the lower end of the connection cylinder is in screwed connection with the upper end of an anchoring cylinder; an upper spacer ring, a sealing adhesive cylinder and a lower spacer ring are integrally sleeve the outer circle of the connection cylinder; anchoring claws are mounted in three groups of step through holes in the upper part of the anchoring cylinder; the upper end of a sealing core shaft is in screwed connection with the lower end of an oil sealing core shaft; the lower end of the sealing core shaft is in screwed connection with a ball seat; the ball seat is mounted on the raised step surface at the lower part of an inner cavity of a lower joint; a sealing steel ball is mounted on the ball surface in the center of the upper end surface of the ball seat. The blowout prevention packer is capable of sealing and unsealing by using a manner of injecting liquid into tube pillars, is convenient and simple to control, and is also capable of automatically achieving downhole high-pressure sealing in a case of blowout and ensuring safety in production.

Description

technical field [0001] The invention relates to a blowout prevention packer used in oil production engineering in the petroleum and natural gas industry. Background technique [0002] In the oil and gas industry, the packer is an indispensable downhole tool for oil testing, oil production, water injection and reservoir stimulation. In oil production engineering, the packer is used for production stratification. The inside of the packer is designed with an oil production channel, and the outside has a packing element, mainly a sealing rubber cartridge. The packer has the functions of setting and unsealing. Usually, the packer is designed with a sealing pressure within a certain parameter range in order to adapt to different downhole working conditions. However, in the process of oil production, the downhole situation is complex and changeable. Especially in oil production methods such as water flooding, the pressure in the water well is generally higher than Oil wells are pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/12E21B33/1295E21B33/128E21B33/126
CPCE21B33/1216E21B33/1265E21B33/1285E21B33/1295
Inventor 李陵陈波张旭伟叶哲伟彭艳芳兰图张海波冷超霞钟梦颖
Owner SOUTHWEST PETROLEUM UNIV
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