Flexible hose for bellows pressure equalizer of electrical submersible well pump
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United States of America Patent
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Nov 13, 2018
Grant Date -
Oct 27, 2016
app pub date -
Apr 11, 2016
filing date -
Apr 23, 2015
priority date (Note) -
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Abstract
A well pump assembly includes a pump and a motor that contains a dielectric motor lubricant and a pressure equalizer containing a bellows. The bellows has an interior in fluid communication with the motor lubricant and an exterior immersed in well fluid. The bellows is axially extendable and contractible in response to a pressure differential between the well fluid and the motor lubricant. A tube has a lower end secured to a tube port in the pressure equalizer housing and an upper end secured to a lower end of the bellows. The tube has a center line that makes at least one curved flexible bend between the tube upper end and the tube lower end to enable the tube to flex as the bellows extends and contracts.
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