Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1985-02-26
1987-05-26
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175410, 125 20, 51206R, E21B 1048
Patent
active
046677550
ABSTRACT:
A drill bit, hvaing heavy-duty cutting elements, is proposed which is intended for rotary, air-cooled application. So that the drill bit can be operated with a relatively low thrust pressure, PCD cutting elements (14) are provided which only slightly overlap the thin-walled cylinder (11, 12) to produce an air gap for cooling and for conveying the drilling dust.
REFERENCES:
patent: 1506119 (1924-08-01), Hansen
patent: 2081302 (1937-05-01), Jarvis
patent: 2996061 (1961-08-01), Miller
patent: 3176675 (1965-04-01), Bomba
patent: 3430526 (1969-03-01), Valenziano
patent: 3494348 (1970-02-01), Lindblad
patent: 3763601 (1973-10-01), Schwarzkopf et al.
patent: 3898772 (1975-08-01), Sawluck
patent: 4056152 (1977-11-01), Lacey
patent: 4098362 (1978-07-01), Bonnice
patent: 4208154 (1980-06-01), Gundy
Geoset* Drill Diamond "Application and Design Guidelines" Brochure Sep., 1981.
M/u/ ller Norbert
Scheuch Anton
Bagnell David J.
Hawera Probst GmbH & Co.
Novosad Stephen J.
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