Abstract: The disclosure herein includes an electric submersible pump assembly for pumping fluids from a wellbore, which electric submersible pump assembly may include: a pump; a housing coupled to the pump; a body disposed in the housing, wherein the body may have a central aperture, an outer surface, and a flow path disposed in the outer surface; and a shaft assembly disposed in the central aperture of the body, wherein the shaft assembly may have a central flow path disposed therethrough and a port in fluid communication with the central flow path, the central aperture of the body, and the flow path disposed in the outer surface of the body.

Abstract: The disclosure herein includes an electric submersible pump assembly for pumping fluids from a wellbore, which electric submersible pump assembly may include: a pump; a housing coupled to the pump; a body disposed in the housing, wherein the body has a central aperture, an outer surface, and a flow path disposed in the outer surface; and a shaft assembly disposed in the central aperture of the body, wherein the shaft assembly has a central flow path and a port.

Abstract: The disclosure herein includes an electric submersible pump assembly for pumping fluids from a wellbore, which electric submersible pump assembly may include: a pump; and a motor assembly coupled to the pump, the motor assembly including: a housing; a stator disposed within the housing, wherein the stator has an inner surface having a diameter; a rotor disposed in the stator, wherein the rotor has an outer surface and a magnet; a first bearing assembly disposed around the rotor; and a second bearing assembly disposed around the rotor; wherein the rotor has a length separating the first bearing assembly from the second bearing assembly; and the length divided by the diameter of the inner surface of the stator yields a ratio from 7.00 to 13.00.