Chuck and wrench assembly for raise drill apparatus

Details Chuck and wrench assembly for raise drill apparatus Chuck and wrench assembly for raise drill apparatus

1979-05-14

1981-11-03

Feldbaum, Ronald

Tool driving or impacting

Means to drive tool about an axis

Means to hold and relatively rotate sections of tool shaft

E21B 300, E21B 722, E21B 1916, E21B 1918

Patent

active

042980763

ABSTRACT:
A chuck mechanism for a raise drill includes a rotatable drive shaft, drill pipe and a chuck for engaging the drill pipe co-axial with the drive shaft and transmitting torque from the drive shaft to the drill pipe. The drive shaft is rotatably coupled to the chuck with relative axial movement allowed. First spaced apart cooperating contact surfaces between the drive shaft and the chuck can be brought together for transmitting axial force from the drive shaft to the chuck in the downward drilling direction. Second spaced apart cooperating contact surfaces between the drive shaft and chuck can be brought together for transmitting axial force from the drive shaft to the chuck in the upward raise drilling direction. The drive shaft and chuck move axially relative to each other when contact is switched from the first to second contact surfaces or vice-versa. The second pair of contact surfaces are shaped and dimensioned for allowing relative angular movement therebetween when the drill pipe is deflected laterally. An outer support is connected to a non-rotatable portion of the raise drill in the path of movement of the chuck for absorbing any moment load exerted by the drill pipe when it is angularly deflected.

REFERENCES:
patent: 3454114 (1969-07-01), Poage
patent: 3490546 (1970-01-01), Hattrup et al.
patent: 3736993 (1973-06-01), West
patent: 3741318 (1973-06-01), Klien et al.
patent: 3768529 (1973-10-01), Klien
patent: 3800887 (1974-04-01), West

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