Screw rod type circumferential direction percussion drilling tool

Abstract

The invention provides a screw rod type circumferential direction percussion drilling tool. The stick-slip vibration phenomenon generated by a drill bit in the process of drilling is reduced. According to the technical scheme, the screw rod type circumferential direction percussion drilling tool is composed of a power assembly, a cardan shaft assembly, a drive assembly and an impact assembly, theupper portion of the power assembly is connected with a drilling rod, the lower portion of the power assembly is connected with the cardan shaft assembly, the drive assembly and the impact assembly insequence, and the lower portion of the power assembly is connected with the drill bit. When working, drilling fluid enters from the upper joint to a drive screw rod to rotate, contiguous screw rod transmission shafts and gear driving shafts are driven to rotate in sequence, and thus gears are driven to rotate. Through gear meshing, a percussion hammer is driven to rotate by a driven gear to crashand impact a shell body to generate an impact effect, and torsional vibration generated by the collision is transferred to the lower joint, finally is transferred to the drill bit to break up rocks.The screw rod type circumferential direction percussion drilling tool can generates torsional impact vibration continuously, the rock breaking efficiency of the drill bit is improved, the phenomenonsof sticking of tool and stick slipping generated are effectively reduced or even avoided, torque is balanced, the drill bit is protected, the service life of the drill bit is prolonged, and the drilling speed is increased.

Description

technical field [0001] The invention relates to a screw type circumferential percussion drilling tool 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 fo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to simplify the structure of the torsion impactor and provide a screw type circumferential percussion drilling in order to solve the problems of drill bit sticking and stick-slip of the drill string during the drilling process, resulting in failure of the drilling tool and low ROP. Tool to overcome deficiencies of existing technologies and increase drilling speed

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