Torsional Vibration Assisted Rock Breaking Tool

Abstract

The invention discloses a torsional vibration auxiliary rock breaking tool. The bottom of the torsional vibration auxiliary rock breaking tool is connected with a drill bit; the torsion vibration auxiliary rock breaking tool comprises a measurement and control short section; the lower part of the measurement and control short section is connected with a vibration short section capable of torsionally vibrating; a vibration device is arranged at the interior of the vibration short section; the lower part of the vibration short section is connected with an acceleration speed measuring short section; the bottom of the acceleration speed measuring short section is connected with the drill bit. Through the torsional vibration auxiliary rock breaking tool, the problems that the cutting teeth of the drill bit are easy to damage and the piezoelectric materials are inappropriately used together with the conventional downhole tools in the prior art can be overcome; the drill bit can be used for applying high-frequency torsional vibration to the rock; the torsional vibration auxiliary rock breaking tool assists the drill bit to break the rock; the mechanic drilling speed can be improved; the service life of the drill bit can be prolonged.

Description

Technical field [0001] The invention relates to a downhole tool in the field of oil and gas exploration and development or geological drilling operations, in particular to a torsional vibration auxiliary rock breaking tool. Background technique [0002] Drilling is a process that connects the ground and the deep part of the formation by establishing a wellbore. The drill bit is the most important rock breaking tool in the drilling process. When drilling into hard rock formations, the ability of the drill bit to break the rock will be greatly reduced. As a result, the mechanical drilling speed will be greatly reduced, possibly from tens of meters per hour to one meter per hour or even lower. In order to increase the ROP, especially when drilling into hard rock formations, in recent years, based on the physical principle of resonance, researchers have proposed to induce partial rock fragmentation by generating resonance frequencies, thereby assisting the drill bit to break the roc...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a torsional vibration assisted rock breaking tool, which overcomes the problems in the prior art that the cutting teeth of the drill bit are easily damaged, and the piezoelectric material is not suitable for common use with conventional downhole tools. Vibration assists the drill bit in breaking rocks, increases the ROP and prolongs the service life of the drill bit

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