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Downhole safety valve

A safety valve and valve plate technology, which can be used in wellbore/well valve devices, wellbore/well components, sealing/packaging, etc. It is effectively guaranteed and other issues to achieve the effect of ingenious structural design, sensitive and fast action, high reliability and safety

Active Publication Date: 2021-10-26
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it takes a long time to open or close the valve plate through the rotation of the servo motor, and the safety and reliability during use cannot be effectively guaranteed.

Method used

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  • Downhole safety valve
  • Downhole safety valve
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Embodiment Construction

[0034] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

[0035] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar exp...

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Abstract

The invention discloses a downhole safety valve, comprising: a hollow shell, the shell includes an upper joint, a middle barrel and a lower joint connected in sequence, a lower fluid channel is formed inside the lower joint, and an electromagnet chamber is arranged in the upper joint , at least two electromagnets are arranged in the electromagnet chamber; the transmission positioning mechanism and the center pipe are arranged in the housing; the first reset member is arranged outside the center pipe; the valve plate seat can be sealedly arranged at the lower end of the center pipe , the second reset piece and the valve plate are fixed on the valve plate seat, the valve plate is provided with at least one balance hole, and a balance valve is installed in the balance hole; the pressure sensor installed on the valve plate seat; the control with the electromagnet and the pressure sensor device. The electromagnet-driven downhole safety valve provided in the present application can make the downhole safety valve no longer limited by the depth of entry, and has short response time, simple operation, reliability and safety.

Description

technical field [0001] The invention relates to the field of downhole tools, in particular to a downhole safety valve. Background technique [0002] The statements in this section only provide background information related to the present disclosure and may not constitute prior art. [0003] When oil and gas wells are performing downhole production operations, they often encounter the situation that the downhole fluid pressure and flow rate increase due to some reason. When encountering the above situation, it is necessary to close the fluid channel in time to avoid major safety accidents. [0004] The downhole safety valve is a downhole tool to prevent blowout and ensure production safety. There are many classification methods of downhole safety valves, which can be divided into hydraulic control drive, electric control magnetic coupling drive and so on according to the drive mode. Among them, hydraulic control drive is the most representative. However, this type of dow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/06E21B34/08
CPCE21B34/066E21B34/08
Inventor 郭岩宝戴金明王德国
Owner CHINA UNIV OF PETROLEUM (BEIJING)