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1. (WO2017155667) LABYRINTH CHAMBER FOR HORIZONTAL SUBMERSIBLE WELL PUMP ASSEMBLY

Pub. No.:    WO/2017/155667    International Application No.:    PCT/US2017/017497
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Feb 11 00:59:59 CET 2017
IPC: F04D 13/10
F04D 29/08
F04D 29/06
E21B 43/12
Applicants: BAKER HUGHES INCORPORATED
Inventors: PYRON, Steven W.
HILL, Jason
TANNER, David
SEMPLE, Ryan
MARTINEZ, Ignacio
Title: LABYRINTH CHAMBER FOR HORIZONTAL SUBMERSIBLE WELL PUMP ASSEMBLY
Abstract:
A submersible well pump assembly (11) has a pump (15), a motor (17), and a tubular pressure equalizer housing (23) located between the pump and the motor. A rotatable drive shaft (31) extends within the housing on the axis (32) for driving the pump. A guide tube (29) surrounds the drive shaft, defining an inner annulus (33) between the drive shaft and the guide tube and an outer annulus (35) between the housing and the guide tube. A well fluid inlet path (26) admits well fluid into the outer annulus. A hub assembly (39) is pivotally mounted to the guide tube. The hub assembly has a communication passage (55) with having at least one lateral portion (57) extending away the axis and a communication passage opening (62) spaced from the axis and in fluid communication with the outer annulus. The hub assembly has a counterweight (63) that rotates the communication passage opening to a point above the axis while the axis is horizontal.