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Method for allowing downhole tool to pass through water distributors back and forth and execution device

A technology of downhole tools and actuators, which is applied in the field of downhole tools traveling back and forth through water distributors, which can solve the problems of increased cost and high cost, and achieve the effects of reliable work, control of use costs, and low misoperation rate

Active Publication Date: 2011-04-27
贵州航天凯山石油仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of these methods require the installation of motors and control circuits, which are costly
Especially the way of cable power supply needs to increase the cost of more than 100,000 yuan

Method used

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  • Method for allowing downhole tool to pass through water distributors back and forth and execution device
  • Method for allowing downhole tool to pass through water distributors back and forth and execution device
  • Method for allowing downhole tool to pass through water distributors back and forth and execution device

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should not be used as any basis for limiting the present invention.

[0022] Embodiments of the present invention: A method for downhole tools to go back and forth through the water distributor of the present invention is to use independent actions as the pop-up signal of the bracket, use sequential compound actions as the retracting signal of the bracket, and control the work of the bracket through the executive device of the full mechanical structure State switching. The independent action is the action of lifting up the steel wire rope tied to the downhole tool. The sequential composite action is to lower the steel wire rope tied to the downhole tool first, and make the bracket support on the support surface of the central hole of the water distributor; then lift up the steel wire rope tied to the downhole tool. The working state of t...

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Abstract

The invention discloses a method for allowing a downhole tool to pass through water distributors back and forth and an execution device. In the method, independent action serves as a pop-up signal of a bracket; sequential composite action serves as a folding signal of the bracket; and the switching of the working states of the bracket is controlled by the execution device with a fully-mechanical structure. The bracket on the downhole tool is controlled by the fully-mechanical structure to be popped up and folded conveniently; and the downhole tool can descend to the well directly by using a steel wire without the control of a motor and a cable, so the using cost is effectively controlled. By the method, the defect that the bracket can be only controlled to be popped up and cannot be controlled to be folded is overcome; and the bracket is controlled to be popped up or folded by using different identification signals, so the error operation rate is low and the work is reliable. The working states of the bracket can be controlled accurately in time through the put-down and pull-up actions of the steel wire, so that the function of descending to the well repeatedly is realized.

Description

technical field [0001] The invention relates to a method and an execution device for an downhole tool to pass through a water distributor back and forth, and belongs to the technical field of downhole tools for water injection wells in oil fields. Background technique [0002] In order to test the water injection wells in the oil field, multiple water distributors are often arranged in the water injection wells. There is a central hole in the water distributor, and a section of the central hole has a larger diameter, forming an annular support surface outside the combination of the large diameter and the small diameter, and the support surface serves as a platform for supporting downhole tools. When the water distributor needs to be tested, the test instrument is placed in the downhole tool, and the downhole tool is placed from the wellhead to the central hole of the water distributor with a wire rope, and the downhole tool is provided with a support that can be ejected. Wh...

Claims

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Application Information

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IPC IPC(8): E21B23/00E21B43/20
Inventor 陈勇庞云伟李玲莉黄超军王文青
Owner 贵州航天凯山石油仪器有限公司
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