Earth boring bit with tilted hydrodynamic thrust bearing

Details Earth boring bit with tilted hydrodynamic thrust bearing Earth boring bit with tilted hydrodynamic thrust bearing

2005-10-12

2008-12-16

Charles, Marcus (Department: 3682)

Bearings

Rotary bearing

Roller drill bit

C384S093000, C384S096000, C175S327000, C175S372000

Reexamination Certificate

active

07465096

ABSTRACT:
An earth boring bit has thrust faces with one of the thrust faces being at least partially tilted relative to the other. The bit has a cone rotatably mounted to a bearing pin of the bit body. The thrust faces are in the cone and on an end of the bearing pin. One of the thrust faces is completely flat and perpendicular to the axis of the bearing pin. The other thrust face has a tilted portion that is at a skewed angle relative to the axis. The tilted portion creates converging and diverging zones between the thrust faces.

REFERENCES:
patent: 1801720 (1931-04-01), Bull
patent: 2654577 (1953-10-01), Green
patent: 2814465 (1957-11-01), Green
patent: 3361494 (1968-01-01), Galle
patent: 4187743 (1980-02-01), Thomas
patent: 4258806 (1981-03-01), Kunkel et al.
patent: 4491428 (1985-01-01), Burr et al.
patent: 4516641 (1985-05-01), Burr
patent: 4600064 (1986-07-01), Scales et al.
patent: 4875532 (1989-10-01), Langford, Jr.
patent: 5265964 (1993-11-01), Hooper
patent: 5307887 (1994-05-01), Welsh
patent: 5586611 (1996-12-01), Dorosz
patent: 5593231 (1997-01-01), Ippolito
patent: 5944125 (1999-08-01), Byrd
patent: 6220374 (2001-04-01), Crawford
patent: 6460635 (2002-10-01), Kaisi et al.
patent: 1137342 (1968-12-01), None
patent: 2117430 (1983-10-01), None
Fundamentals of Fluid Film Lubrication, McGraw-Hill, Inc. by Bernard J. Hamrock, pp. 172-174 and cover.

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