Patent ID: 9385570
Filing Date: 2016-07-05
CPC Classification: H02K,Y10T

Claim Text:
1. An apparatus for pumping fluid from a well, the apparatus comprising: a pump adapted to pump production fluid from a wellbore; a motor assembly operably connected to the pump, the motor assembly comprising: a housing, a winding, the winding comprising a magnet wire having a plurality linear segments running generally parallel to the axis of the housing and a plurality of end turns proximate to an end of the housing and connecting each linear segment, the plurality of linear segments and end turns being positioned around an inner diameter of the housing to define a winding inner diameter therethrough; a rotor positioned concentrically within the winding inner diameter; a lubricant within the housing to lubricate the rotor; an annular coil packing ring, the coil packing ring being positioned proximate to the winding and at least a portion of the end turns of the winding to restrain movement of the end turns; and wherein the coil packing ring comprises a packing ring cylinder and a packing ring flange, at least a portion of the packing ring cylinder being positioned concentrically within the winding inner diameter and the packing ring flange being positioned proximate to the plurality of end turns.