Hard rock film coating dill bit

Abstract

The invention discloses a hard rock film coating dill bit. The hard rock film coating dill bit comprises two bit tools and a drill bit body, the bit tools are symmetrically arranged on the drill bit body, and the bit tools are wear-resisting reinforced bit tools. Body protecting alloys distributed peripherally are located at the positions, located at the lower ends of the bit tools, of the drill bit body, water through holes are formed in the drill bit body, drill bit retreating blades are symmetrically arranged at the positions, located at the lower ends of the bit tools, of the drill bit body, and the drill bit retreating blades are installed on the drill bit body through rotating shafts. Connecting rods which are movably installed are arranged on the drill bit body, the connecting rodsare of a round structure and water through holes are arranged in the center positions of the connecting rods, a fixing block used for preventing the mutual rotation of the connecting rods and the drill bit body is arranged at the upper ends of the connecting rods, the fixed block can move up and down along a sliding groove formed in the drill bit body, and a spring is arranged between the lower end of the fixing block and the drill bit body. The hard rock film coating dill bit can realize the rapid drilling of a mine, and at the same time, during drill bit retreating, the drill bit can be retreated quickly through the drill bit retreating blades to prevent the drill bit from sticking when the drill bit is retreated.

Description

technical field [0001] The invention relates to the technical fields of mining and geological drilling, in particular to a hard rock coated drill bit. Background technique [0002] The drill bit is a tool that directly contacts the rock during the drilling process and breaks the rock through cutting and punching. The drill bits widely used in modern drilling engineering mainly include roller cone bits and PDC bits (Polycrystalline Diamond Compact Bits polycrystalline diamond compact bits). Today, both the roller cone bit and the PDC bit have been developed to a fairly high level, but there are still some insurmountable problems. One is fear of reaming and reaming, which will damage the roller cone bit of the sealed bearing, especially the PDC bit; the other is that the movement of the center rock at the bottom of the well is small, the function is insufficient, and the center rock is not easy to break, which affects the ROP of the drill bit. Roller cone bits and PDC bits h...

AI Technical Summary

Problems solved by technology

[0003] Due to the development of cracks in the surrounding rock of the roadway, the hole wall often collapses after drilling, and even the large-scale hole collapse in the drilling area makes it difficult for the drill bit and drill pipe to exit

When the hole depth is large, the number of drill pipes in the drilled hole is large, and it cannot be taken out after the hole collapses, resulting in serious loss of drills and rods, resulting in serious waste

The drill pipes and drill bits buried in the coal rock mass will cause great safety hazards to the safe production of coal mines, especially the production of the working face.

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