Torsional vibration tool based on impeller and spring

Abstract

The invention provides a torsional vibration tool based on an impeller and a spring. The torsional vibration tool is constituted by an upper joint, a power assembly, a transmission shaft, a lower joint and an impact assembly. The upper portion of the upper joint is connected with a drill rod, and the lower portion of the upper joint is connected with the power assembly. The power assembly rotatesat a high speed under the impact effect of drilling fluid and then sequentially drives the transmission shaft and a hammer fixing cavity to rotate, the hammer fixing cavity drives impact hammers to rotate, and the impact hammers rotate to collide with the lower joint to generate impact torsional vibration. According to the torsional vibration tool, the impact hammers are symmetrically placed withrespect to the axis of the hammer fixing cavity, the torsional vibration impact effect can be provided twice when the impact hammers rotate once, and under the effect of spring force, the impact hammers periodically collide with the lower joint in the circumferential direction continuously. Rotation and impact generated through the tool are transmitted to a drill bit through the lower joint to provide power for the drill bit and enable the drill bit to generate high-frequency one-way circumferential vibration, the phenomena of drill jamming and stick slip can be effectively avoided, and accordingly the drilling efficiency is improved.

Description

technical field [0001] The invention relates to a torsional vibration tool based on an impeller and a spring used in the fields of petroleum and natural gas shale gas drilling, mining, geological drilling and the like. Background technique [0002] In recent years, with the country's increasing demand for oil and natural gas, the exploitation of shale gas is also a hot spot and a challenge. Because during the drilling process, due to the driller’s technical and experience problems, the driller’s technical and experience problems often cause the drill to be sent too late or too fast, or because of the friction of the well wall, the drilling pressure applied to the drill bit is unstable, which affects the rock breaking efficiency. It is even possible to damage the drill bit, crack the cutting teeth of the drill bit, etc. due to the sudden increase of the drilling pressure, which will affect the drilling speed. On the other hand, when the PDC drill bit is drilling hard or abra...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a torsional vibration tool based on an impeller and a spring to overcome the problems of drill bit sticking and stick-slip of the drill string leading to drilling tool failure and low ROP during the drilling process. There are technical flaws to increase the drilling speed

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