Rotating shaft seal and bearing lubricating apparatus

Details Rotating shaft seal and bearing lubricating apparatus Rotating shaft seal and bearing lubricating apparatus

1981-01-12

1985-10-22

Leppink, James A.

Boring or penetrating the earth

With below-ground tool drive prime mover

Fluid rotary type

175228, E21B 402

Patent

active

045482837

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a seal or bearing lubricating system adapted for use in a downhole tool such as a drilling motor includes chamber means packed with grease for lubricating said seal and/or bearing, and centrifugal separator means responsive to rotation of a shaft included in said tool for separating and trapping solid particles suspended in the well fluids to prevent contamination of the grease by such solid particles. Pressure equalization across a principal rotating shaft seal also is disclosed.

REFERENCES:
patent: 3659662 (1972-05-01), Dicky
patent: 4080115 (1978-03-01), Sims
patent: 4260031 (1981-04-01), Jackson
patent: 4260032 (1981-04-01), Fox
patent: 4260167 (1981-04-01), Fox
patent: 4324299 (1982-04-01), Nagel

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