Earth boring bit with labyrinth seal protector

Details Earth boring bit with labyrinth seal protector Earth boring bit with labyrinth seal protector

E - Fixed Constructions

21

B

255/78

E21B 10/22 (2006.01)

Patent

CA 1253484

ABSTRACT OF THE DISCLOSURE An earth boring bit with sealed and lubricated bearings and rotatable cutters, the seals being isolated from detritus in the borehole by a seal protector ring and groove The ring, generally L shaped in cross-section, has radial and axial clearances from the registering groove to maintain a labyrinth path with selected values, irrespective of cone movement during drilling.

510054

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