Drag bit

Details Drag bit Drag bit

1982-08-09

1984-10-09

Suchfield, George A.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

E21B 1046

Patent

active

044756062

ABSTRACT:
A design for a drill bit (10) is provided. The design permits placement of a plurality of cutters (14) in a pattern approaching an ideal equal volume cutting arrangement while minimizing the mathematical steps necessary to calculate the desired positions. The design positions the cutters so that the annular area between radially adjacent cutters is a constant. Certain groups of cutters can also be positioned to prevent a central core in the material drilled and to provide a desired kerf overlap.

REFERENCES:
patent: 2264617 (1941-12-01), Carpenter et al.
patent: 3106973 (1963-10-01), Christensen
patent: 3158216 (1964-11-01), Baron et al.
patent: 3871488 (1975-03-01), Sabre
patent: 3885638 (1975-05-01), Skidmore
patent: 4051912 (1977-10-01), White
patent: 4073354 (1978-02-01), Rowley et al.
patent: 4248314 (1981-02-01), Cunningham
patent: 4253533 (1981-03-01), Baker
Sandia Laboratories, "Stratapax.TM. Computer Program", (SAND77-1994), Apr. 1978, by Richard F. Ashmore, Dr. K. W. Chase and D. L. Mahlum.
"Optimisation of Radial Distribution of Stratapax .sup.(T1) Cutters in Rock Drilling Bits", Feb. 1, 1980, by J. D. Barr.

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