Earth boring drill bit with snap ring cutter retention

Details Earth boring drill bit with snap ring cutter retention Earth boring drill bit with snap ring cutter retention

E - Fixed Constructions

21

B

255/77

E21B 10/00 (2006.01) E21B 10/20 (2006.01) E21B 10/24 (2006.01) E21B 17/00 (2006.01) F16C 43/02 (2006.01)

Patent

CA 1093065

Abstract of the Disclosure Disclosed herein is an earth boring bit having exclusively friction bearings and a snap ring cutter re- tainer. A lubrication system includes a compensator to control the pressure differential across the seal between the rotatable cutter and bearing shaft. This apparatus provides a bit of maximum bearing size and strength and simplifies construction for greater reliability. -2-

306830

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