US 11,859,474 B2
Lubricating downhole rotating machine
David Biddick, Houston, TX (US); Patrick McMullen, Yorba Linda, CA (US); Christopher Matthew Sellers, Fullerton, CA (US); and Herman Artinian, Huntington Beach, CA (US)
Assigned to Upwing Energy, LLC, Cerritos, CA (US)
Filed by Upwing Energy, Inc., Cerritos, CA (US)
Filed on Jun. 26, 2020, as Appl. No. 16/913,642.
Claims priority of provisional application 62/991,452, filed on Mar. 18, 2020.
Prior Publication US 2021/0293124 A1, Sep. 23, 2021
Int. Cl. E21B 43/12 (2006.01); F04D 13/06 (2006.01); F04D 13/08 (2006.01); F04D 29/06 (2006.01); H02K 7/14 (2006.01); F04D 13/02 (2006.01); F04D 13/10 (2006.01)
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
OG exemplary drawing
 
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.