Bearings – Rotary bearing – Roller drill bit
Patent
1986-04-14
1988-02-02
Levy, Stuart S.
Bearings
Rotary bearing
Roller drill bit
384 94, 384 95, 175369, 175371, 277 95, 277206R, E21B 1032, E21B 1022, F16C 1710, F16J 908
Patent
active
047226153
ABSTRACT:
An underreamer including a body having a bore therethrough, an arm mounted at its upper end to the body, a conical cutter mounted for rotation on the lower end of each arm, a cup-shaped thrust bearing between the cutter and the arm, means extending through the arm to secure the cutter on the arm including pin elements that extend into a groove in the cutter to prevent rotation movement between the arm and the thrust bearing to lock the thrust bearing to the arm. The arms are pivotally mounted in slots in the body and means are provided for moving the arms to their cutting position with their lower ends positioned radially outward from the body.
REFERENCES:
patent: 1835523 (1931-12-01), Reed
patent: 2104819 (1938-01-01), Schlumpf et al.
patent: 2190365 (1940-02-01), Maxwell
patent: 2641447 (1953-06-01), Kammerer
patent: 3047344 (1962-07-01), Gros
patent: 4161343 (1979-07-01), Brashear
patent: 4181377 (1980-01-01), Oelke
patent: 4235295 (1980-11-01), Zyglewyz
patent: 4266622 (1981-05-01), Vezirian
patent: 4293167 (1981-10-01), Mayo et al.
patent: 4413918 (1983-11-01), Thomas
patent: 4444518 (1984-04-01), Schramm et al.
patent: 4478299 (1984-10-01), Dorosz
patent: 4533003 (1985-08-01), Bailey et al.
patent: 4600064 (1986-07-01), Scales et al.
Bailey Thomas F.
Campbell John
A-Z International Tool Company
Levy Stuart S.
Permut Steven L.
Sutherland Malcolm L.
Werner David
LandOfFree
Drilling apparatus and cutter therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drilling apparatus and cutter therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drilling apparatus and cutter therefor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1633850