Section milling type casing pipe sidetracking windowing tool

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...

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 middle section milling window tool The working surface of the cutter body is fixed and cannot be retracted, which is not conducive to operation, the complex structure leads to control difficulties, and the cutter body is poor in strength. Segment milling type casing sidetracking window opening tool

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