Drilling method and rotary drill bit crown

Details Drilling method and rotary drill bit crown Drilling method and rotary drill bit crown

1990-04-04

1991-06-25

Novosad, Stephen J.

Boring or penetrating the earth

Processes

175329, 175330, 175410, E21B 1002, E21B 1046, E21B 1048

Patent

active

050258710

ABSTRACT:
A rotatable crown for a rotary drill comprising a working end and an opposite end for engagement in a drill rod, stringer or adaptor coupling, the working end having a cutting face and a plurality of discrete, spaced, elongate cutting elements located in the cutting face, each cutting element:

REFERENCES:
patent: 3726351 (1973-04-01), Williams, Jr.
patent: 4162900 (1979-07-01), Judd
patent: 4190126 (1980-02-01), Kabashima
patent: 4373593 (1983-02-01), Phaal et al.
patent: 4440246 (1984-04-01), Jurgens
patent: 4499959 (1985-02-01), Grappendorf et al.
patent: 4602691 (1986-07-01), Weaver
Polykristalline Diamantverbundstoffe als Schneideinsatze fur Drehbohrwerkzeuge im Berghau, from Gluckauf Forschungshefte, vol. 48, No. 6, Dec. 6, 1987, pp. 289-297.

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