Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1997-06-19
1999-08-31
Neuder, William
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
384 93, E21B 1022
Patent
active
059441259
ABSTRACT:
A rotary cone drill bit includes a drill bit body having two or more support spindles extending inward and downward toward a vertical axis of the drill bit body. Each support spindle of the drill bit includes a base pin and further includes a pilot pin extending from the base pin along a longitudinal axis of the support spindle. A conical-shaped thrust face forms the transition from the base pin to the pilot pin. A cutting cone is rotatably mounted on each support spindle and includes a conical internal surface to run in contact with the conical thrust face of the support spindle. Rotation of the cutting cone carries lubricant from the non-load side of the spindle to the contact surfaces on the load side of the spindle.
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Neuder William
Varel International, Inc.
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