Stacked labyrinth chambers for use with an electrical submersible pump
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United States of America Patent
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Feb 4, 2014
Grant Date -
May 23, 2013
app pub date -
Nov 23, 2011
filing date -
Nov 23, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A labyrinth type seal section for use with an electrical submersible pump assembly having a guide tube with an axial bore to port wellbore fluid to a lower end of the seal section. Lubricating fluid fills substantially all of the seal section above an interface between the lubricating fluid and the wellbore fluid. The guide tube circumscribes a drive shaft that extends between a motor and a pump. The guide tube and shaft form an annulus filled with lubricating fluid that communicates to the well fluid and to the motor, so that pressure in the motor can be equalized to pressure of the ambient well fluid.
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