Concave drag bit cutter device and method

Details Concave drag bit cutter device and method Concave drag bit cutter device and method

1990-07-16

1992-01-07

Melius, Terry L.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

299 86, 299 91, E21B 1046

Patent

active

050782193

ABSTRACT:
A concave drag bit cutter device and cutting method using such a concave cutter bit are provided which provide substantially increased efficiencies over conventional point attack bits. A number of different cutter bit shapes employing a concave cutting face can be used. The cutter bits are intended to replace the conventional point attack cutter bits and can be used in continuous mining machines, saw blades, auger drills, longwall shearers and the like, in cutting and mining operations.

REFERENCES:
patent: 3856359 (1974-12-01), Krekeler
patent: 4593777 (1986-06-01), Barr
patent: 4678237 (1987-07-01), Collin
patent: 4783123 (1988-11-01), Ottestad
patent: 4906294 (1990-03-01), von Haas et al.
patent: 4911254 (1990-03-01), Keith

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