High temperature radial bearing for electrical submersible pump assembly

摘要

A submersible pump assembly includes a rotary pump and an electrical motor operatively connected to the pump for driving the pump. A seal section is connected between the motor and the pump for reducing a pressure differential between lubricant in the motor and hydrostatic well fluid pressure. A shaft assembly extends from the motor through the seal section and the pump. A sleeve surrounds the shaft assembly. A carrier body has an inner diameter surface. An anti-rotation member is on an exterior of the carrier body in static engagement with an inner diameter surface of the pump assembly for preventing rotation of the carrier body. An annular metal radially deflectable spring is located between and in contact with an outer diameter surface of the sleeve and with the inner diameter surface of the carrier body. The spring is a wave spring with undulations.

主权项

1. A submersible pump assembly, comprising:
a rotary pump having a longitudinal axis; an electrical motor operatively connected to the pump for driving the pump; a seal section connected between the motor and the pump for reducing a pressure differential between lubricant in the motor and hydrostatic well fluid pressure; a shaft assembly extending from the motor through the seal section and the pump; a sleeve surrounding the shaft assembly; a carrier body having an inner diameter surface; an anti-rotation member on an exterior of the carrier body in static engagement with the inner diameter surface of the pump assembly for preventing rotation of the carrier body; and an annular metal radially deflectable spring located between and in contact with an outer diameter surface of the sleeve and with the inner diameter surface of the carrier body for preventing the sleeve from rotating; wherein: the spring comprises a wave spring having a circumscribed outer diameter that prior to insertion between the carrier body and the sleeve is initially greater than the inner diameter surface of the carrier body; and the wave spring has a circumscribed inner diameter that prior to insertion between the carrier body and the sleeve is initially smaller than the outer diameter surface of the sleeve.