An ultra-short radius suspended side drilling multi-lateral well drilling method and combined drilling tool

Abstract

The application relates to a kind of ultra-short radius suspended side drilling multi-branch drilling methods and combined drilling tools, relating to low-carbon oil drilling and production technical field.Guide hole is bent upwards in guide cylinder and is connected with oil pipe, high-pressure steel wire hose is installed in oil pipe and guide hole, and high-pressure steel wire hose is screwed into seat hole and is connected with combined drilling tool.The beneficial effects of the application are as follows: by installing combined drilling tool radially in guide cylinder, combined drilling tool is connected with flexible high-pressure steel wire hose as the source of power and propelling force, and oil pipe is used as the outer sleeve of high-pressure steel wire hose, so that the problem of insufficient propelling force of flexible high-pressure steel wire hose is solved, the problem that branch well cannot be drilled horizontally during drilling is solved, each branch well is in an oil reservoir, and recovery efficiency is improved;combined drilling tool is operated in cooperation with windowing drill bit and rock stratum drill bit, so that casing windowing and stratum horizontal drilling can be simultaneously completed, and cost is low.

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