Roller cone bit with positive and negative offset and smooth run

Details Roller cone bit with positive and negative offset and smooth run Roller cone bit with positive and negative offset and smooth run

1995-01-26

1996-12-24

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175356, 175376, E21B 1008

Patent

active

055866123

ABSTRACT:
An earth-boring bit has a bit body and at least a pair of cantilevered bearing shafts depending downwardly and inwardly therefrom. A first cutter is mounted for rotation on one of the bearing shafts and has a region of contact with the sidewall of the borehole. A second cutter is mounted for rotation on another of the bearing shafts and has a region of contact with the sidewall of the borehole that is non-opposite that of the first cutter. Stabilization is provided by a stabilizer pad carried on the bit body and arranged to be opposite the contact regions of the first and second cutters.

REFERENCES:
patent: 1635592 (1927-07-01), Wadsworth
patent: 2147926 (1939-02-01), Scott
patent: 2148372 (1939-02-01), Garfield
patent: 4611673 (1986-09-01), Childers et al.
patent: 4657093 (1987-04-01), Schumacher
patent: 4953641 (1990-04-01), Pessier

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