Earth-boring bit with improved cutting structure

Details Earth-boring bit with improved cutting structure Earth-boring bit with improved cutting structure

1996-08-06

1998-10-13

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175374, E21B 1016

Patent

active

058198610

ABSTRACT:
An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a cutter shell surface including a gage surface and a heel surface. A plurality of cutting elements inserts are arranged in generally circumferential rows on the cutter. At least one scraper cutting element is secured at least partially to the heel surface of the cutter. The scraper cutting element includes an outermost surface, generally aligned with the gage surface of the cutter, that defines a plow edge or point for shearing engagement with the sidewall of the borehole while redirecting cuttings up the borehole.

REFERENCES:
patent: 3452831 (1969-07-01), Beyer
patent: 5201376 (1993-04-01), Williams
patent: 5287936 (1994-02-01), Grimes et al.
patent: 5351768 (1994-10-01), Scott et al.
patent: 5353885 (1994-10-01), Hooper et al.
patent: 5479997 (1996-01-01), Scott et al.
patent: 5542485 (1996-08-01), Pessier et al.
patent: 5544713 (1996-08-01), Dennis

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