Drilling bit fluid-cooled friction bearing

Details Drilling bit fluid-cooled friction bearing Drilling bit fluid-cooled friction bearing

1977-04-27

1980-03-18

Pate, III, William

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175340, 175371, E21B 910

Patent

active

041934636

ABSTRACT:
In a drilling bit, a cone shaped cutter is rotatably mounted on a spindle on anti-friction bearings and on a friction bearing in the nose of the spindle. A passage is formed in the exterior cylindrical surface of the spindle nose in the load bearing zone. This passage is connected to a radial passage on the end or thrust bearing surface of the spindle, and the center of the thrust bearing surface communicates with a weep hole in the nose of the cutter. Cooling fluid is ducted through the spindle and through these passages to provide cooling directly in the area where the generated heat is the greatest and fluid flow a minimum in previous constructions.

REFERENCES:
patent: 1816203 (1931-07-01), Behnke
patent: 2025260 (1935-12-01), Zublin
patent: 2025261 (1935-12-01), Zublin
patent: 2044303 (1936-06-01), Howard
patent: 3720274 (1973-03-01), McCallum
patent: 3921735 (1975-11-01), Bysart
patent: 3923108 (1975-12-01), Williams, Jr.
patent: 3923398 (1975-12-01), Peck

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