Drill bit and improved cutting element

Details Drill bit and improved cutting element Drill bit and improved cutting element

1983-02-18

1988-02-16

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175410, E21B 1046

Patent

active

047249137

ABSTRACT:
A drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein having polycrystalline diamond cutting elements mounted on said inserts. The diamond cutting elements have a novel cutting shape facilitating drilling through hard formations with a minimum of applied weight on the bit. The cutting elements are in the shape of a relatively large disc shaped cutter commonly used for medium and soft formations but have the sides shaped into a cutting edge of substantially smaller radius. The cutting element has the strength and resistance to breakdown of the larger disc but the cutting capacity in hard formations of a smaller diameter cutter. The cutting elements are also disclosed as novel components of the drill.

REFERENCES:
patent: 4073354 (1978-02-01), Rowley et al.
patent: 4098363 (1978-07-01), Rohde et al.
patent: 4108260 (1978-08-01), Bozarth
patent: 4156329 (1979-05-01), Daniels et al.
patent: 4253533 (1981-03-01), Baker, III
patent: 4359112 (1982-11-01), Garner et al.
patent: 4359335 (1982-11-01), Garner

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