Hydraulic drive percussion primary-secondary drilling bit

Abstract

The invention relates to the technical field of underground power tools, particularly to a hydraulic drive percussion primary-secondary drilling bit. The hydraulic drive percussion primary-secondary drilling bit comprises a drilling bit body and teeth which are arranged on the end face of the drilling bit body; the end face of the drilling bit body is in a ladder separation type; an orthographic projection is in a three-plate fan blade type; the end face comprises the end face of a central circle which is in an integral structure and fan-blade-shaped three end faces; the fan-blade-shaped three end faces are uniformly distributed on an external ring of the end face of the central circle; an arc-shaped chip removal groove is formed in the root portion of every fan-blade-shaped end face; the three arc-shaped chip removal grooves are closely attached to the external ring of the end face of the central ring; three bidirectional arc chip removal grooves which are in mutual non-intersection are uniformly formed inside the end face of the central circle; the three bidirectional arc chip removal grooves are corresponding to the three arc-shaped chip removal grooves one to one; and arc-shaped openings of the bidirectional arc chip removal grooves are opposite to arc-shaped openings of the arc chip removal grooves. The hydraulic drive percussion primary-secondary drilling bit has the advantages of enabling rock debris to be convenient to enter into flow channels, enabling repeat crush to be avoided, reducing rate of the rock debris returning to the bottom of a well, preventing fall off of edge teeth and improving rock cleaning efficiency and service life.

Description

technical field [0001] The invention relates to the technical field of downhole power tools, in particular to a hydraulic percussion and spinner drill bit. Background technique [0002] Percussive drilling technology is a drilling method that combines percussion drilling and rotary drilling. Its principle is to add an impactor on the basis of ordinary rotary drilling. The impactor relies on high-pressure gas or drilling fluid to push its piston. The up and down movement hits the rotary drill bit at the lower end, and the rotary drill bit breaks the rock under the combined action of impact dynamic load and static pressure rotation. The percussion and rotary drilling technology has the advantages of fast drilling speed, low drilling cost, large cuttings, low drilling pressure and light well deviation when drilling hard formations. At present, the rotary drilling technology has been widely used in mining, quarrying, geological exploration, hydrological water wells, oil drillin...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in order to solve the problems of poor chip removal, repeated crushing of cuttin

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