Rock bit cone retention system

Details Rock bit cone retention system Rock bit cone retention system

E - Fixed Constructions

21

B

E21B 10/08 (2006.01)

Patent

CA 2312151

A roller cone drill bit includes a bit body adapted to be rotated about a longitudinal axis. At least one leg depends from the bit body, and a journal is cantilevered from the leg. A roller cone is rotatably mounted on the journal. A cone retention member is disposed between a first slot in the journal and a corresponding second slot in the roller cone. An access hole runs through the journal to the first slot, penetrating the first slot at a location away from the top dead center of the first slot.

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