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Annulus safety device applied to electric submersible pump producing well

A safety device and technology for oil production wells, which are used in earth-moving drilling, wellbore/well components, sealing/packing, etc., can solve problems such as unusable safety valves, prevent blowout accidents, and achieve the effect of remote control

Inactive Publication Date: 2015-06-17
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problem that conventional safety valves cannot be used when other pipe strings need to be inserted into the production pipe string, and provides an annulus safety device used in electric submersible pump production wells to prevent blowout accidents

Method used

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  • Annulus safety device applied to electric submersible pump producing well
  • Annulus safety device applied to electric submersible pump producing well
  • Annulus safety device applied to electric submersible pump producing well

Examples

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Embodiment Construction

[0046] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0047] This embodiment discloses an annulus safety device used in electric submersible pump production wells, and the crossing form of the inserted pipe string 23 does not affect the opening and closing of the production oil circuit. Such as figure 1 with figure 2 As shown, the annular safety device is mainly composed of an insertion tube sealing part, a hydraulic control part, a spring control part, a passage control part and a self-balancing mechanism.

[0048] The function of the sealing part of the insertion tube is to introduce and seal the introduced insertion string 23 , which is mainly composed of a guide head 22 and a guide cylinder 21 .

[0049] The upper end of the guide head 22 is trumpet-shaped, and the lower end is connected ...

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PUM

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Abstract

The invention discloses an annulus safety device applied to an electric submersible pump producing well. The device comprises an inserting pipe sealing part, a hydraulic control part, a spring control part, a path control part and a self-balancing mechanism. Opening and closing of the annulus safety device can be remotely controlled by replacing a safety valve with a valve plate structure in a well, where other pipe columns are inserted into a production pipe column, and through control of a ground hydraulic system, so that the safety problems of an electric heating well and a same-well injection-extraction well are solved and the blowout accident is avoided. The annulus safety device has a pressure self-balancing function and solves the problem that the annulus safety device cannot be opened under overhigh downhole pressure caused when the well is closed for a long time.

Description

technical field [0001] The present invention relates to the equipment for extracting oil, gas, water, soluble or meltable substances or mineral mud from the well, in particular, it relates to the equipment used for sealing between the inserted pipe string and the production pipe string in the electric submersible pump oil production string The safety device of the inter-annulus. Background technique [0002] When the electric submersible pump is used for oil production, for safety reasons, the production string of some production wells is connected with a safety valve with a valve plate structure, a cable packer, and an air release valve. The opening and closing of the safety valve and the air release valve are controlled by It is controlled by the hydraulic pressure in the hydraulic control pipeline connected to the ground, and the depth of the safety valve is relatively shallow, about 200m. When a blowout occurs in the downhole fluid production, it is necessary to cut off...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/10
Inventor 刘鹏王尧葛春晓张春升罗建伟赵仲浩
Owner CHINA NAT OFFSHORE OIL CORP
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