US 12,264,679 B2
Downhole transmission with wellbore fluid flow passage
Donn J. Brown, Tulsa, OK (US); Trevor Alan Kopecky, Tulsa, OK (US); and Ketankumar Kantilal Sheth, Tulsa, OK (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Oct. 28, 2022, as Appl. No. 17/976,356.
Prior Publication US 2024/0141903 A1, May 2, 2024
Int. Cl. F04D 13/10 (2006.01); E21B 43/12 (2006.01); E21B 43/38 (2006.01); E21B 47/008 (2012.01); F04D 13/02 (2006.01); F04D 13/08 (2006.01); F04D 15/00 (2006.01); F04D 29/62 (2006.01)
CPC F04D 13/10 (2013.01) [E21B 43/121 (2013.01); E21B 43/128 (2013.01); E21B 47/008 (2020.05); F04D 13/02 (2013.01); F04D 13/021 (2013.01); F04D 13/028 (2013.01); F04D 13/086 (2013.01); F04D 15/0066 (2013.01); F04D 29/628 (2013.01); E21B 43/38 (2013.01)] 28 Claims
OG exemplary drawing
 
1. An electric submersible pump (ESP) assembly, comprising:
an electric motor comprising a first drive shaft;
a seal section disposed uphole of the electric motor comprising a second drive shaft coupled to the first drive shaft;
a gas separator disposed uphole of the seal section comprising a third drive shaft coupled directly or indirectly to the second drive shaft, wherein the gas separator is fluidically coupled to an exterior of the electric submersible pump assembly and wherein the gas separator comprises a fluid mover and a gas flow path and liquid flow path separator having a gas phase discharge port open to an exterior of the gas separator and a liquid phase discharge port;
a first downhole transmission assembly disposed uphole of the gas separator, comprising a flow passage fluidically coupled to the liquid phase discharge port of the gas separator, a fourth drive shaft coupled to the third drive shaft of the gas separator, a fifth drive shaft, and a transmission that mechanically couples the fourth drive shaft to the fifth drive shaft, wherein the transmission is configured to turn the fifth drive shaft at a different angular speed than the angular speed of the fourth drive shaft; and
a centrifugal pump assembly disposed uphole of the first downhole transmission assembly,
wherein the centrifugal pump assembly comprises an inlet that is fluidically coupled to the flow passage of the first downhole transmission assembly, a sixth drive shaft that is coupled to the fifth drive shaft, and a plurality of pump stages,
wherein each pump stage comprises an impeller coupled to the sixth drive shaft drive shaft and a diffuser retained by a housing of the centrifugal pump assembly.