Borehole drill construction

Details Borehole drill construction Borehole drill construction

1987-04-22

1988-08-23

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Axially parallel side wall with transverse cuttings...

175321, 175393, E21B 414, E21B 17046, E21B 1707

Patent

active

047654180

ABSTRACT:
A borehole drill construction comprising a cylindrical casing, a chuck mounted on one end of the casing by means of a screw-thread and a cutter head carried by the chuck. The chuck has at least one axially projecting dog thereon which is received in a corresponding recess in the cutter head to provide a means to transmit torque from the casing to the cutter head via the chuck. The cutter head is retained on the bit by at least one plug projecting into a slot in the cutter head, which is permitted limited axial movement thereby.

REFERENCES:
patent: 2252912 (1941-08-01), Armentrout
patent: 3163244 (1964-12-01), Zimmerman
patent: 3299971 (1967-01-01), Lewis

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