Impact-resistant screw drill tool

Abstract

The invention discloses an impact-resistant screw drill tool, comprising a screw drill outer shell, wherein the screw drill outer shell is internally and rotatably provided with a transmission shaft, the lower end of the transmission shaft stretches out of the screw drill outer shell, the lower end part of the transmission shaft is sheathed with a cushion collar provided with a drilling head, the transmission shaft and the cushion collar are in spline fit, the transmission shaft is provided with a cushion limiting device used for limiting the axial moving range of the cushion collar, an axial elastic cushioning device is arranged between the transmission shaft and the cushion collar, and the fit clearance of the transmission shaft and the cushion collar is provided with a sealing device. In the invention, the axial elastic cushioning device is arranged between the transmission shaft and the cushioning collar, which alleviates or eliminates bit jumping and impact shock generated when drilling is carried out at the bottom layer of bit jumping, reduces damages of the drill tool and the drilling head, protects the connection of a drill collar and the completeness of a well wall, prolongs the overall service life of the drill tool, and enhances the safety and the speed of well drilling.

Description

technical field [0001] The invention relates to the field of drilling equipment, in particular to a screw drilling tool. Background technique [0002] During drilling, the drilling tool and the drill bit are drilled under the condition of large drilling pressure and outputting a large torque through the drilling tool, especially the roller cone bit is drilled by continuously crushing the rock by the gear teeth. The moment the pressure shatters, there is a shock and shock. It tends to be particularly prominent in the gravel layer or the bottom layer with high hardness and poor stability, and even the phenomenon of drill jumping occurs. If there is drill jumping, it will produce a resonance effect, which can make drill pipes and drilling tools of thousands of meters jump together, which is extremely destructive to drill pipes, drilling tools and drill bits. Vibration will cause greater destructive force to the well wall, and collapse will occur quickly. The accumulation of ...

AI Technical Summary

Problems solved by technology

The impact damage suffered during work greatly affects the service life

[0004] Universal joints are also greatly damaged by impacts, which can easily cause damage to petals and steel balls, reducing the normal service life

Each connection button of the drilling tool is also prone to loosening and disconnection due to impact and vibration, resulting in a well-falling accident

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