Patent ID: 8772997
Filing Date: 2014-07-08
Classification: F04B,F04D,F05D,H01B,H01R,H02K

Abstract:
1. An electric submersible pumping system comprising: a pump; an electric motor coupled to the pump, the motor having a stator containing a plurality of slots; a plurality of magnet wires extending through the slots in a selected winding pattern, each of the magnet wires having at least one insulation layer, the magnet wires protruding past a lower end of the stator in loops positioned around an end bell area, the loops of magnet wire being grouped into three phases, each of the phases extending circumferentially around and being positioned at a different distance from a longitudinal axis of the motor; a dielectric lubricant contained in the motor; a slot insulation within each the slots, each of the slot insulations being in a cylindrical shape and surrounding all of the magnet wires located within each of the slots; a cylindrical end bell insulation extending around all of the loops; a phase-to-phase insulation formed as a cylinder and located between each of the phases of the loops, the end bell insulation surrounding each of the phase-to-phase insulations; each of the slot insulations, the end bell insulation, and the phase-to-phase insulations comprising a sheet of polyimide film sandwiched between inner and outer chemical barrier sheets, each of the chemical barrier sheets of the end slot insulations, the bell insulation, and the phase-to-phase insulations being a film selected to protect the polyimide film of the slot insulations, the end bell insulation and the phase-to-phase insulations from chemical attack from one or more chemicals in the dielectric lubricant, the chemical barrier sheets of the slot insulations, the end bell insulation, and the phase-to-phase insulation being selected from polyether ether ketone (PEEK) film and polytetrafluoroethylene (PTFE) film; and wherein the slot insulations, the end bell insulation, and the phase-to-phase insulations have temperature ratings in excess of 180 degrees C.