Boring or penetrating the earth
With storage means for bit lubricant carried by bit or shaft
With fluid pressure-actuated feed means
Inventor
active
Composite earth boring bit seal
Dual-seal drill bit pressure communication system
Dual-seal drill bit pressure communication system
Dual-seal drill bit pressure communication system
Dual-seal drill bit pressure communication system
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Profile ID: LFUS-PAI-P-191512