Downhole tool with pressure pulse for stable percussion action

Abstract

The invention discloses a downhole tool realizing the stable impact effect through pressure pulses. The downhole tool is suitable for the field of petroleum drilling. According to the technical scheme, an upper connector, an upper shell, a lower shell and an anvil block are sequentially connected through screw threads; an annular check ring is located between the upper connector and an inner cylinder and is axially located through the inner cylinder; the lower end of a belleville spring is adjacent to a hammer base and is axially located; a piston and the lower end of a splitting sleeve are connected through threads; the upper end of a folded spring is connected to a connection sleeve, and the lower end of the folded spring is adjacent to a locating sleeve and is axially located; a half-dividing ring is located in a groove of the anvil block, and an octagonal sleeve is fixed to the lower shell through threads and is clamped between the lower shell and the anvil block. According to the downhole tool, frictional resistance between lower drills of existing horizontal wells and extended reach wells and well walls can be effectively lowered, the backing pressure problem in the well drilling process can be solved, the well drilling efficiency can be improved, and downhole accidents such as jamming can be avoided.

Description

technical field [0001] The invention relates to a downhole tool used in the fields of oil drilling, mining, geological drilling and the like to achieve stable impact by pressure pulses. Background technique [0002] During drilling operations, the drilling tool needs to work not only in the vertical direction, but also in the horizontal or other directions. When the drilling tool is working in the vertical direction, the drill bit is on the same axis as the upper drill string, and the drill bit is connected to the lower end of the drill string to drill downward, and the drill bit can receive enough drilling pressure for drilling operations; and when the drilling tool needs to work in the horizontal direction or When working in other directions deviated from the vertical direction, the bottom end of the upper drill string needs to be bent at a corresponding angle. Due to the long horizontal section and poor purification effect at the bottom of the well, the frictional resist...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to design a pressure tool to overcome the problems of large drilling friction in existing horizontal wells and extended-reach wells, the lack of effective transmission of drilling pressure to the drill bit and the unsatisfactory use effect of existing axial vibration tools. Downhole tool with pulse for stable percussion action

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