Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – With fluid pressure-actuated feed means
Patent
1990-10-30
1992-08-11
Novosad, Stephen J.
Boring or penetrating the earth
With storage means for bit lubricant carried by bit or shaft
With fluid pressure-actuated feed means
175367, 175368, 175370, 175371, 384 93, 384 95, 384 96, E21B 1020, E21B 1022, E21B 1024
Patent
active
051370972
ABSTRACT:
A modular drill bit mounts legs within recesses in a body which are parallel to the central axis of the body using threaded studs with tapered outer portions, in conjunction with an attached pin having recesses therein receiving the upper ends of the legs. The lower ends of the legs terminate in spindles of open face configuration rotatably receiving cones thereon for rotation via a arrangement of bushings, roller bearings and thrust bearings, and a plurality of seals which slide and therefore rotate relative to both the leg spindle and the cone with the help of pressure compensating apparatus. A bushing disposed in the cone-leg spindle interface has oil-lubricated rubber rods disposed in apertures therein to prevent lock-up on an adjacent bearing surface. The cone is held in the leg spindle by a lock nut forming one end of a race for receiving rollers of a roller bearing, in conjunction with a ring-nut secured to an extended portion of the cone protecting the leg from wear and damage. The cone-leg spindle interface is lubricated by oil containing Teflon and molybdenum and which is pumped by a main thrust bearing for recirculation through radiator apparatus in the side of the leg. Such apparatus cools the oil in response to mud sprayed by an asymmetrical arrangement of adjustable ceramic nozzles mounted in a bottom surface of the body.
REFERENCES:
patent: 1305489 (1919-06-01), Patin
patent: 1729062 (1929-09-01), Bull
patent: 1858980 (1932-05-01), Behnke
patent: 2075997 (1937-04-01), Reed
patent: 2600321 (1952-06-01), Pyle
patent: 3199878 (1965-08-01), Cunningham et al.
patent: 3244459 (1966-04-01), Ortloff
patent: 3365247 (1968-01-01), Ferrand
patent: 3721307 (1973-03-01), Mayo
patent: 3847235 (1974-11-01), Goodfellow
patent: 3915246 (1975-10-01), Sheshtawy
patent: 3935911 (1976-02-01), McQueen
patent: 4172502 (1979-10-01), Nederveen
patent: 4263976 (1981-04-01), Lachonius
patent: 4298079 (1981-11-01), Norlander et al.
patent: 4367904 (1983-01-01), Olschewski et al.
patent: 4445791 (1984-05-01), Klima
patent: 4519614 (1985-05-01), Garner
patent: 4738322 (1988-04-01), Hall et al.
patent: 4765205 (1988-08-01), Higdon
patent: 4865137 (1989-09-01), Bailey et al.
patent: 4887675 (1989-12-01), Shotwell
Modular Engineering
Novosad Stephen J.
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