Patent ID: 8358043

Claim:
A submersible pump assembly comprising: a submersible pump; an electrical motor filled with a dielectric lubricant; a seal section connected between the motor and the pump for reducing a pressure differential between the lubricant in the motor and well fluid on an exterior of the assembly; the motor comprising: a stator rigidly mounted within a housing, where a stator outer diameter and a housing inner diameter form an annular gap between the stator and the housing; a rotor located within a central cavity of the stator, the rotor capable of rotation relative to the stator and being immersed in the lubricant; and a high thermal conductivity material (HTCM) located in the gap between the stator outer diameter and the housing inner diameter, the HTCM having a different composition than the lubricant in the motor and being in fluid communication with the lubricant.