Bearing section for a downhole motor

Details Bearing section for a downhole motor Bearing section for a downhole motor

1994-04-29

1995-01-31

Hannon, Thomas R.

Bearings

Rotary bearing

Water lubricated propellor shaft or well shaft

175107, E21B 402

Patent

active

053854071

ABSTRACT:
A bearing section for a downhole motor that is coupled to a drill pipe string and that has a power section, a bearing section and a drill bit section. The improved bearing section includes a first drilling fluid lubricated bearing assembly being located between inner and outer cylindrical members, a second fluid sealed bearing assembly above said first drilling fluid lubricated bearing assembly between the inner and outer cylindrical members to prevent drilling fluid from the power section from directly reaching the first drilling fluid lubricated bearing assembly from within the inner and outer cylindrical members, and at least two orifices in the outer cylindrical member in the vicinity of the first bearing assembly for allowing drilling fluid exiting from said drill bit to enter therein and exit therefrom to lubricate the first bearing assembly.

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