CPC E21B 43/128 (2013.01) [F04D 13/024 (2013.01); F04D 13/0606 (2013.01); F04D 13/086 (2013.01); F04D 13/10 (2013.01); F04D 29/061 (2013.01); H02K 7/14 (2013.01)] | 9 Claims |
1. A well tool comprising:
an electric machine configured to be positioned within a wellbore, the electric machine enclosed within a housing isolating the electric machine from fluids within the wellbore;
a first lubrication circuit comprising a lubrication reservoir within the housing, the lubrication reservoir fluidically connected to the electric machine, the first lubrication circuit comprising a downhole lubrication pump connected to the lubrication reservoir and configured to provide lubrication to a first bearing within the electric machine;
a fluid rotor configured to move or be moved by a fluid within the wellbore;
a magnetic coupling that couples the fluid rotor and a rotor of the electric machine to rotate in unison; and
a second lubrication circuit configured to provide lubrication to a second bearing supporting the fluid rotor.
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