Hydraulic impact-preventive screw drill

Abstract

The invention discloses a hydraulic impact-preventive screw drill. The hydraulic impact-preventive screw drill comprises a transmission shaft; a liquid hole is axially formed at the inner part of the transmission shaft; an upper limiting sleeve pipe is arranged in match with the outer side of the transmission shaft by a sleeving manner; a shaft end sleeve barrel which sleeves the outside of the transmission shaft through a spline is connected to the upper limiting sleeve pipe; a sealing sleeve pipe and an elastic buffering sleeve ring, which are tightly arranged at the outside of the transmission shaft by the sleeving manner, are arranged below the shaft end sleeve barrel; an elastic peripheral edge sleeve, which is mounted at the outside of the lower limiting sleeve pipe by the sleeving manner, is integrally connected with the peripheral side of the elastic buffering sleeve ring; a buffering sleeve pipe is connected in match with the lower end of the shaft end sleeve barrel; a hydraulic buffering cavity is axially formed in the upper part of the buffering sleeve pipe. According to the hydraulic impact-preventive screw drill, the liquid-based buffering and guide mode is adopted, which can effectively reduce or remove bit bouncing and impact vibration, the protection effect dynamically acts all the times, and therefore, the damage to a drill and a drill bit can be reduced, the connection of a drill collar and the completeness of the well wall are protected, and the service life of the whole drill is prolonged; in addition, the well drilling safety is improved.

Description

technical field [0001] The invention relates to a 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, collapse and fall of blocks will occur, and the accumulation of a...

AI Technical Summary

Problems solved by technology

The impact damage suffered during work greatly affects the service life

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

Images