Rolling-cutter earth-boring bit having predominantly super-hard

Details Rolling-cutter earth-boring bit having predominantly super-hard Rolling-cutter earth-boring bit having predominantly super-hard

1997-02-14

1999-01-05

Tsay, Frank S.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175428, E21B 1046

Patent

active

058552472

ABSTRACT:
An earth-boring bit has a bit body. At least one cantilevered bearing shaft depends inwardly and downwardly from the bit body and a cutter is mounted for rotation on the bearing shaft. The cutter includes a plurality of cutting elements, at least one of which has a generally cylindrical element body of hard metal. A pair of flanks extend from the body and converge to define a crest. The crest defines at least one sharp cutting edge at its intersection with one of the flanks.

REFERENCES:
patent: 4150728 (1979-04-01), Garner et al.
patent: 4570726 (1986-02-01), Hall
patent: 4722405 (1988-02-01), Langford, Jr.
patent: 4832139 (1989-05-01), Minikus et al.
patent: 5323865 (1994-06-01), Isbell et al.
patent: 5346026 (1994-09-01), Pessier et al.
patent: 5353885 (1994-10-01), Hooper et al.
patent: 5592995 (1997-01-01), Scott et al.
patent: 5752573 (1998-05-01), Scott et al.
patent: 5758733 (1998-06-01), Scott et al.

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