Drag drill bit having improved arrangement of cutting elements

Details Drag drill bit having improved arrangement of cutting elements Drag drill bit having improved arrangement of cutting elements

1988-11-07

1989-07-18

Kisliuk, Bruce M.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175393, 175394, 175400, 175410, E21B 1060

Patent

active

048484890

ABSTRACT:
A drag type rotary bit (10) having a plurality of arcuate blades (24A-24E) each having a row of cutting elements (36A-36G) thereon. The cutting elements (36A-36G) are arranged on the arcuate blades (24A-24E) with around one-half of the length of the arcuate blades (24A-24B) being positioned adjacent the outer periphery (20) of the bit body (12) to provide a relatively long length mounting area or the cutting elements (36D-36G) at the gage (20). Deep grooves (26) are provided adjacent each of the blades (24A-24E) and provide a relatively large passage for the outwardly flow of drilling fluid and entrained cuttings.

REFERENCES:
patent: 2838284 (1958-06-01), Austin
patent: 3095935 (1963-07-01), Hildebrandt et al.
patent: 3181632 (1965-05-01), Raynal
patent: 3951220 (1976-04-01), Phillips, Jr. et al.
patent: 4350215 (1982-09-01), Radtke
patent: 4475606 (1984-10-01), Crow
patent: 4538690 (1985-09-01), Short, Jr.
patent: 4574895 (1986-03-01), Dolezal et al.
patent: 4682663 (1987-07-01), Daly et al.

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