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Safety valve for downhole oil well pump

A technology for oil well pumps and safety valves, which is applied to wellbore/well valve devices, pump components, wellbore/well parts, etc., which can solve problems such as hidden safety hazards and inconvenient implementation of process measures, so as to improve safety and solve production problems. Effects of potential safety hazards and inconvenient implementation of technological measures

Active Publication Date: 2021-12-14
CNOOC ENERGY TECH & SERVICES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is mainly to provide a downhole oil pump safety valve for the existing downhole oil pump type thick oil thermal recovery injection-production integrated pipe string in the production process of potential safety hazards and inconvenient implementation of technological measures.

Method used

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  • Safety valve for downhole oil well pump
  • Safety valve for downhole oil well pump
  • Safety valve for downhole oil well pump

Examples

Experimental program
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Effect test

Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Such as Figure 1 to Figure 4 As shown, the safety valve of the downhole oil pump of the present invention is mainly composed of an upper cylinder 1, a liner 2, a guide hook 3, a middle cylinder 4, a lower cylinder 5, a valve seat 6, a lower joint 7, a butt joint 8, an upper Core tube 9, spring A10, guide screw 11, lower core tube 12, spring B13, fixing screw 14, push ring 15, torsion spring 16, pin shaft 17 and valve plate 18 etc. are composed.

[0029] The upper cylinder body 1 , the middle cylinder body 4 , the lower cylinder body 5 and the lower joint 7 are fixed and sealed sequentially from top to bottom. The liner 2 and the guide hook 3 are fixedly arranged inside the upper cylinder 1 and the middle cylinder 4 respectively, and the lower end surface of the liner 2 is in contact with the upper end surface of the guide hook 3 . A valve seat 6 is arranged o...

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Abstract

The invention discloses a safety valve for an downhole oil well pump, which comprises an upper cylinder body, a middle cylinder body, a lower cylinder body and a lower joint connected in sequence, a liner and a guide hook are arranged in the upper cylinder body and the middle cylinder body respectively; A valve seat is arranged on the inner side, and a pin shaft, a valve plate and a torsion spring are arranged at the lower part of the valve seat; in the integral interior formed by the liner, the guide hook, the middle cylinder, the lower cylinder and the valve seat, there is an upper core with axial telescopic fit. tube and the lower core tube, the butt nipple is set inside the lower core tube; the guide screw is axially limited between the lower core tube and the guide hook; A spring A is provided in the annular space formed by the upper core tube and the lower core tube; a spring B acting between the lower end surface of the middle cylinder body and the upper end surface of the push ring is arranged between the lower cylinder body and the lower core tube. The invention is applicable to the downhole oil pump type heavy oil thermal recovery injection-production integrated pipe string.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, and more specifically relates to a safety valve of an oil well pump. Background technique [0002] The downhole well pump is a rod-type plunger pump, which is widely used in various oil fields due to its low manufacturing cost; especially because of its simple internal structure and can be made of all metal, it can It has also been widely used in injection-production integrated strings. [0003] The downhole safety valve is used to control the opening and closing of the internal passage of the downhole pipe string, and is one of the indispensable components in the downhole safety control system. [0004] However, in the downhole well pump type heavy oil thermal recovery injection-production integrated pipe string, because the pipe string is equipped with a sucker rod for driving the injection plug in the pump, when the conventional downhole safety valve is installed on the pump, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/12F04B53/10
CPCE21B34/12F04B53/102
Inventor 刘志龙邓建明刘阳刘敏马英文范白涛张彬奇马长亮刘海英
Owner CNOOC ENERGY TECH & SERVICES
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