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 10/22 (2006.01) F16C 43/02 (2006.01)

Patent

CA 1096851

Abstract of the Disclosure Disclosed herein is an earth boring bit of other- wise conventional construction except for the bearing and cutter retention. A snap ring is used to retain the cutter, the grooves that receive the ring and the ring construction being such that the ring is forced into the retainer groove when the cone is thrust inward. The ring cannot therefore accident- ally return to its assembly position to permit cutter loss. This enables the use of exclusively frictional bearings and retainer means of exceptional strength and reliability. -2-

304706

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