Cone drill bit

Details Cone drill bit Cone drill bit

1994-03-21

1996-01-23

Schoeppel, Roger J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175371, 384 95, 384108, E21B 1000

Patent

active

054858917

ABSTRACT:
A cone drill bit includes legs and attached to them trunnions with cones mounted thereon. A support unit for mounting the cones upon the trunnions includes a strengthened radial thrust ball bearing which transmits a load directed along a cone centerline. Strengthening the ball bearing in order to increase a bit wear resistance is attained by using the balls which diameter is appropriately related to the bit diameter as well as by strengthening a shoulder on the trunnion between the ball and peripheral roller bearings.

REFERENCES:
patent: 3303898 (1967-02-01), Bercaru
patent: 4359113 (1983-11-01), Morris
patent: 4448268 (1984-05-01), Fuller
patent: 4825964 (1989-05-01), Rives
patent: 5016719 (1991-05-01), White

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