Bearing system for a downhole motor

Details Bearing system for a downhole motor Bearing system for a downhole motor

1980-09-15

1986-03-25

Novosad, Stephen L.

Boring or penetrating the earth

With below-ground tool drive prime mover

Fluid rotary type

415502, E21B 402

Patent

active

045777047

ABSTRACT:
An improved bearing system for the driven shaft of a downhole motor is shown that provides a main thrust and radial bearing system having means for sealing the bearings in oil at equal or slight pressure above that of the drilling mud inside the drill pipe and insulating the fluid seals and bearings from all possibility of contact with cuttings and debris from the drilling operation. A durable seal having a restricted flow path permitting slow leakage is positioned below the main bearing system in such a relationship to the drilling fluid distribution path that the seals for the oil bath for the bearings are subjected to essentially the same pressure on all sides.

REFERENCES:
patent: 2990894 (1961-07-01), Mitchell et al.
patent: 3456746 (1969-07-01), Garrison et al.
patent: 3807513 (1974-04-01), Keva

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