Differential torsion impactor based on screw and gear

Abstract

The invention provides a differential torsion impactor based on a screw and a gear, which solves the sticky-slip and vibration phenomenon produced by a drill bit in the drilling process. The differential torsion impactor based on the screw and the gear is characterized in that the differential torsion impactor consists of a power assembly, an universal shaft assembly, a drive assembly and an impact assembly, wherein the upper portion of the power assembly is connected with a drill stem, the lower portion is successively connected with the universal shaft assembly, the drive assembly and the impact assembly, and the power assembly drives a flange driving shaft to rotate; and on one hand, the flange drive shaft drives an eccentric impact hammer to rotate at a high speed by virtue of a driveshaft and a drive pin, on the other hand, an outer gear is driven to rotate and engage with an inner gear shell, a lower rotation speed is transferred to the inner gear shell to drive the impact driveshaft to rotate at a lower rotation speed, so that the drive shaft forms a rotation speed difference with an eccentric impact block to generate an impact effect, and the torsion vibration generated by the collision is transferred to a lower connector by virtue of the impact drive shaft. The differential torsion impactor can continuously produce torsion impact vibration, so that the rock breakingefficiency of the drill bit can be increased, and the jamming of drill tool and sticky-slip phenomenon can be effectively avoided.

Description

technical field [0001] The invention relates to a screw and gear-based differential torsion impactor 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 abrasive for...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a differential torsion impactor based on a screw and a gear in order to solve the problems of drill bit sticking and stick-slip of the drill string leading to drilling tool failure and low ROP in the drilling process. Overcome the defects of the existing technology and increase the drilling speed

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