Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1980-12-01
1982-10-05
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175394, 175404, 175410, E21B 1048, E21B 1054, E21B 1056
Patent
active
043524001
ABSTRACT:
A drill bit (10) comprises a cast body (12) with full length wide overlapping integral spiral stabilizer lands (14) between intervening spiral grooves (16), integral short, strong, stubby spiral fingers (18) reinforced by additional web portions (12a) angularly spaced about a short core receiving bore (b) and the longitudinal axis of the body (21).
An inclined core ejection passage (P) extends radially outwardly from a spherical inlet end thereof connected to the core receiving bore (b) and at which an inclined hard core cutter breaker inserted within a pocket is situated. The leading sides of the fingers have support surfaces (18a) and shoulders (18b) for supporting engagement with composite abrasive compact cutters comprised of a carbide backing (30a) bonded to the support surfaces (18a) and layers of bonded polycrystalline abrasive particles at opposite cutting sides (30b) inclined at a negative rake angle.
The body is also provided with flushing fluid passages (24) and a central bore at its drive end adapted with means (22) to connect drive means, with a flushing fluid passage therein to drive the drill bit (10).
REFERENCES:
patent: 1172139 (1916-02-01), Jenkins
patent: 1485444 (1924-03-01), Twogood
patent: 1977845 (1934-10-01), Emmons
patent: 2109613 (1938-03-01), Cook
patent: 3241624 (1966-03-01), Rassieur
patent: 4091884 (1978-05-01), Thomas
patent: 4098362 (1978-07-01), Bonnice
patent: 4248313 (1981-02-01), Bonca
Christensen Dgw. 20-268-033 and Photos 1-3 of Prior New and Used, Worn, Bent and Broken "STRATAPAX" Drag Bits.
Davis John S.
Grappendorf Richard H.
Sirrine Gordon G.
Christensen Inc.
Falk Joseph
Fred Walter
Novosad Stephen J.
LandOfFree
Drill bit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill bit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-419908