Underground horizontal drilling combined drilling tool of oil well drilling platform

Abstract

The invention relates to oil underground drilling equipment, in particular to an underground horizontal drilling combined drilling tool of an oil well drilling platform for completing the tapping of the steel sleeve wall as well as the cement and the lithosphere through descending into a well for once. An execution mechanism of the underground horizontal drilling combined drilling tool is divided into an inner layer, a middle layer and an outer layer; the underground horizontal drilling combined drilling tool comprises a drilling tool for drilling the steel sleeve wall and a guide apparatus for tapping the cement and the lithosphere, wherein the drilling tool and the guide apparatus are driven by a location hydraulic cylinder to perform reciprocating motion, so as to complete the horizontal drilling of the steel sleeve wall as well as the cement and the lithosphere through descending into the well for once and greatly improve the underground horizontal tapping efficiency; a drill in the drilling tool is flexible; the feeding direction of a feeding hydraulic cylinder is the axial direction of the shell of the execution mechanism, therefore, the occupancy space of the drilling tool is decreased and the size of the execution mechanism is reduced; a power source provides power for the execution mechanism through an oil pipe which has good sealing with a sealing connector so that special sealing for a motor and a battery as well as a wire is not needed. The equipment of the invention has the advantages of simple structure, convenient operation and low cost.

Description

technical field [0001] The invention relates to downhole drilling equipment for oil wells, in particular to a combined drilling tool for downhole horizontal drilling of an oil drilling platform that can complete the opening of steel casing walls, cement and rock layers by one trip down the well. Background technique [0002] In order to meet the requirements of oil extraction technology, it is necessary to drill horizontal holes at different depths on the downhole casing wall. When opening a hole, it is necessary to use a drill bit to drill a hole on the wall of the steel casing, and then use a high-pressure nozzle to spray the hole on the cement layer and rock layer. At present, the existing drilling process is to first fix the guide at the desired drilling position, then lower a set of drilling tools to drill holes on the steel casing wall, lift the drilling tools after drilling, and then lower the high-pressure nozzle Drill holes in cement and rock. Since the drilling d...

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