US 12,291,950 B2
Downhole lubrication system
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, LLC, Cerritos, CA (US)
Filed on Dec. 29, 2023, as Appl. No. 18/400,558.
Application 18/400,558 is a division of application No. 16/913,642, filed on Jun. 26, 2020, granted, now 11,859,474.
Claims priority of provisional application 62/991,452, filed on Mar. 18, 2020.
Prior Publication US 2024/0133278 A1, Apr. 25, 2024
Int. Cl. E21B 43/12 (2006.01); F04D 13/02 (2006.01); F04D 13/06 (2006.01); F04D 13/08 (2006.01); F04D 13/10 (2006.01); F04D 29/06 (2006.01); H02K 7/14 (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)] 7 Claims
OG exemplary drawing
 
1. A method of providing lubrication to a downhole tool, the method comprising:
flowing a first lubricant, by a first lubrication circuit, to a first set of bearings within an electric machine of the downhole tool, the electric machine comprising an electric rotor and an electric stator, the first set of bearings supporting the electric rotor within the electric stator;
isolating the electric machine and the first set of bearings, by a pressure-sealed housing, from a wellbore;
flowing a second lubricant, by a second lubrication circuit, to a second set of bearings within a fluid end, the fluid end comprising a fluid rotor and a fluid stator, the second set of bearings supporting the fluid rotor within the fluid stator while the second set of bearings are exposed to fluids from the wellbore;
receiving electricity by an electric motor, the electric motor being different from the electric machine, the electric motor being within the downhole tool; and
driving a downhole lubrication pump by the electric motor.