Drill bit and cutter therefor

Details Drill bit and cutter therefor Drill bit and cutter therefor

1985-01-25

1987-06-02

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175410, E21B 1046

Patent

active

046695567

ABSTRACT:
An elongate cutter for a drag-type drill bit includes a stud defining one end thereof and a cutting formation comprising a cutting face generally adjacent the other end. Length extends from one end to the other, depth extends generally transverse to the cutting face as well as transverse to the length, and width extends transverse to both length and depth. The stud has a cross section transverse to its length such that the cross section cannot be circumscribed by a reference circle whose diameter is equal to the maximum width of the cross section. The cross section also has an assumed section modulus, in the direction of depth, greater than that of the reference circle. The leading side of the cutter comprises a first planar zone adjacent the one end and a second planar zone adjacent the other end, and on which the cutting formation is carried. The maximum lateral dimension of the leading side is generally greater than or equal to the maximum width of the cutter.

REFERENCES:
patent: 3106973 (1963-10-01), Christensen
patent: 3726351 (1973-04-01), Williams, Jr.
patent: 3999619 (1976-12-01), Watson
patent: 4128136 (1978-12-01), Generoux
patent: 4333540 (1982-06-01), Daniels et al.
patent: 4382477 (1983-05-01), Barr
patent: 4451093 (1984-05-01), Perez
patent: 4491188 (1985-01-01), Grappendorf
patent: 4498549 (1985-02-01), Jurgens
patent: 4533004 (1985-08-01), Ecer

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