Patent ID: 8100200
Filing Date: 2012-01-24
Classification: E21B,Y10T

Abstract:
1. A chuck assembly for an earth-boring drill assembly, the drill assembly including a casing having a central axis, and an earth-boring bit, the chuck assembly comprising: a chuck connectable to the casing and operable to support the earth-boring bit, the chuck having an outer surface with a radially-outwardly extending chuck shoulder; and an annular sleeve positionable on the chuck, the sleeve having an inner surface with a radially-inwardly extending sleeve shoulder engageable with the chuck shoulder to limit axial movement of the sleeve relative to the chuck; one of the chuck and the sleeve defining an axially-extending slot, the other of the chuck and the sleeve having a lug, the lug being positionable in the slot to limit relative rotational movement between the sleeve and the chuck.