Rock bit with diamond reamer to maintain gage

Details Rock bit with diamond reamer to maintain gage Rock bit with diamond reamer to maintain gage

1977-06-06

1979-02-20

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175374, 175410, E21B 936

Patent

active

041401891

ABSTRACT:
A rock drill bit comprises a bit body and at least one rolling cone cutter mounted on the bit body, the rolling cone cutter comprising a plurality of tungsten carbide inserts including a plurality of gage inserts for drilling adjacent the peripheral wall of the hole being drilled. At least one diamond cutter protrudes from the bit body to provide a cutting edge substantially on the gage diameter of the rock bit so that such a diamond insert can engage the peripheral wall of the hole being drilled, thereby maintaining the hole gage. Each diamond cutter comprises a carbide slug inserted in the bit body and a diamond plate bonded to the slug. Such diamond cutters are on a peripheral portion of the bit body above the cutter cones.

REFERENCES:
patent: 2182562 (1939-12-01), Koebel
patent: 2419901 (1947-04-01), Lake
patent: 2708104 (1955-05-01), McAllister
patent: 3130801 (1964-04-01), Schumacher, Jr.
patent: 3134447 (1964-05-01), McElya
patent: 3344870 (1967-10-01), Morris
patent: 3513728 (1970-05-01), Hudson et al.
patent: 3628616 (1971-12-01), Neilson
patent: 3745623 (1973-07-01), Wentorf, Jr. et al.
patent: 4006788 (1977-02-01), Garner

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