Insert for a drilling tool bit and a method of drilling therewit

Details Insert for a drilling tool bit and a method of drilling therewit Insert for a drilling tool bit and a method of drilling therewit

1986-03-17

1987-09-29

Novosad, Stephen J.

Boring or penetrating the earth

Processes

175410, 428552, E21B 1046

Patent

active

046963529

ABSTRACT:
A coated insert for such drilling tool bits as mine tool roof bits or masonry drill bits. A hard, fracture resistant substrate is coated with one or more thin adherent layers of refractory coating material. The material of each layer is a carbide, nitride, or carbonitride of titanium, hafnium, vanadium, tantalum, or niobium, or an oxide of aluminum or zirconium or a mixture or solid solution of these compounds. Methods for drilling holes in a mine roof or other hard materials are also disclosed.

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