Drilling bit

Details Drilling bit Drilling bit

1983-03-25

1985-07-09

Pate, III, William F.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175336, 175348, E21B 1004

Patent

active

045276447

ABSTRACT:
A drilling bit comprising a drill body formed from a base portion and a crown portion having a plurality of cutting elements; the base and crown portions are interengaged by a connection portion. An external opening in the crown portion communicates with a core-receiving section in the connecting portion. A core milling assembly, comprising a pair of rotatable, frustum-shaped rotary members, is supported in the connecting section. Each rotary member carries a plurality of cutting elements. During drilling, a core is received in the core-receiving section, where it is milled by the rotation of the rotary members.

REFERENCES:
patent: 1637594 (1927-08-01), Stewart
patent: 1996322 (1935-04-01), Carlson
patent: 2086751 (1937-07-01), Taylor
patent: 2297157 (1942-09-01), McClinton
patent: 2549420 (1951-04-01), Camp
patent: 2587429 (1952-02-01), Arutunoff
patent: 2667334 (1954-01-01), Ortloff
patent: 2738166 (1956-03-01), Koch
patent: 3418022 (1968-12-01), Peterson
patent: 3915246 (1975-07-01), Sheshtawy
patent: 4186628 (1980-11-01), Bonnice
patent: 4217966 (1980-08-01), Garrett
Cortes, "Core-Crusher Bit Drills Faster, Eliminates Nose Wear," Oil and Gas Journal, Jun. 23, 1980, at 111-15.

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