Cooled journal bearing

Details Cooled journal bearing Cooled journal bearing

1981-02-25

1983-06-07

Purser, Ernest R.

Boring or penetrating the earth

With heating or cooling drilling fluid

175227, 384 94, E21B 1018, E21B 1022

Patent

active

043866638

ABSTRACT:
An earth boring bit has a friction or journal bearing with features that allow cooling fluid to be circulated near the bearing. The bit is of the type having rotatable cutters carried by depending bearing pins. A bushing is stationarily mounted on the bearing pin, with the bushing's inner surface in contact with the outer surface of the bearing pin. One of the surfaces has a plurality of grooves that extend at least partially around the bearing pin. Passages are formed in the bearing pin and bit for circulating cooling fluid through the grooves. The cutter is mounted on the bushing in rotating and sliding contact to form a journal bearing.

REFERENCES:
patent: 2037967 (1936-04-01), DeCosta
patent: 3374039 (1968-03-01), Voorhies
patent: 3695721 (1972-10-01), Jungel
patent: 3720274 (1973-03-01), McCallum
patent: 4035039 (1977-07-01), Johansson et al.
patent: 4136748 (1979-01-01), Dickerhoff
patent: 4167219 (1979-09-01), McQueen
patent: 4206952 (1980-06-01), Olschewski
patent: 4287957 (1981-09-01), Evans

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