Centrifugal pump with thrust balance holes in diffuser
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United States of America Patent
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Aug 12, 2014
Grant Date -
Mar 10, 2011
app pub date -
Sep 9, 2010
filing date -
Sep 9, 2009
priority date (Note) -
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Abstract
A centrifugal pump has alternating impellers and diffusers. One or more vent holes extend through one or more vanes of one or more diffusers. In an upthrust condition, high pressure production fluid from an upper impeller is able to pass through the one or more vent holes, and thereby exert force on the preceding impeller. The force exerted on the preceding impeller offsets the upthrust force acting against the preceding impeller.
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