Earth boring bit with shear compression seal

Details Earth boring bit with shear compression seal Earth boring bit with shear compression seal

1985-12-27

1987-06-09

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

277 92, 384 94, E21B 1022

Patent

active

046713689

ABSTRACT:
An earth boring bit having a lubrication system that includes a pressure compensator and seals to confine lubricant within the bearings between rotatable cutters and shafts, the seals being of the asymmetrical shear/compression type, each half of which having a load deflection curve resulting from components satisfying the following criteria:

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