Section milling type casing pipe sidetracking windowing tool

A casing and sidetracking technology, which is applied in the direction of earthwork drilling, wellbore/well components, etc., can solve the problems of inability to shrink the working surface of the cutter body, poor cutter body strength, and difficult control, so as to reduce the cost of sidetracking window opening , good effect, flexible and convenient operation

Inactive Publication Date: 2015-06-24
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a flexible and convenient operation, simple structure and good control, durable cutter body, can be opened or folded automatically, sidetracking window opening effect is good, and construction efficiency is high; to solve the existing midd

Method used

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  • Section milling type casing pipe sidetracking windowing tool
  • Section milling type casing pipe sidetracking windowing tool
  • Section milling type casing pipe sidetracking windowing tool

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Embodiment Construction

[0019] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings:

[0020] This section milling type casing side drilling window opening tool is composed of an upper joint 1, a tool body 2, a guide cone 3, a guide cone seat 5, a guide rod 14, and a piston assembly. The upper end of the tool body 2 is installed with a threaded connection. The upper joint 1 and the tool body 2 are equipped with a diversion cone seat 5 on the upper part of the cavity. The diversion cone seat 5 is installed with a diversion cone 3 through bolts and a sealing ring 13, and one end of the diversion rod 14 is made with a boss, and the guide rod 14 The boss is clamped to the lower part of the guide cone 3, a small spring 4 is installed at the connection between the guide cone 3 and the guide rod 14; the lower part of the guide cone seat 5 in the cavity of the tool body 2 is installed with a piston assembly; A tool holder 9 is installed at the lo...

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Abstract

The invention relates to a section milling type casing pipe sidetracking windowing tool, and belongs to the technical field of petroleum and gas well casing sidetracking windowing tools. The section milling type casing pipe sidetracking windowing tool is composed of an upper connector, a tool body, a flow guide cone, a flow guide cone seat, a flow guide rod, a piston assembly and the like, and is characterized in that the upper connector is arranged at the upper end of the tool body, the flow guide cone seat is arranged on the upper portion of a cavity of the tool body, and the flow guide rod and the flow guide cone are in clamped connection; a small spring is arranged at the connecting position of the flow guide cone and the flow guide rod, and the piston assembly is arranged at the position, on the lower portion of the flow guide cone seat, in the cavity of the tool body, and is composed of an upper piston body, a throttle pipe, a lower piston body, a spring, a limiting pressing plate, a supporting sleeve and a supporting nut; a knife rest is arranged on the lower portion of the tool body, and provided with knives through pin shafts; the lower piston body is provided with the supporting sleeve through the supporting nut, and the limiting pressing plate is arranged below the lower piston body. The stretching amount of the knives can be adjusted and controlled, and the knives can be automatically opened or contracted, and are solid and durable. Operation is convenient, the sidetracking windowing effect is good, and milling efficiency is high.

Description

Technical field [0001] The invention relates to a section milling type casing sidetracking window opening tool, belonging to the technical field of oil and gas drilling casing sidetracking window opening tools. Background technique [0002] At present, many oilfields at home and abroad have entered the middle and late stages of development. In order to improve the recovery rate and development efficiency of the wells that have been drilled, based on the principle of maintaining the integrity of the well pattern and saving costs, the developed wells are used to detect dead oil areas. Or deepening the horizon to obtain new deep oil and gas wells is the consensus and ongoing work of oil and gas exploration companies. To complete this work, it is a very effective means to carry out sidetracking and windowing of the well drilled. The sidetracking window opening can well cope with the complex terrain and complex well conditions of deep and ultra-deep wells, and effectively solve the d...

Claims

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Application Information

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IPC IPC(8): E21B29/06
CPCE21B29/06
Inventor 冯定孙巧雷夏成宇吕加华陈敏施雷钱利勤
Owner YANGTZE UNIVERSITY
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