Diffuser vanes with pockets for submersible well pump
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United States of America Patent
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Oct 10, 2017
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N/A
app pub date -
Jun 6, 2014
filing date -
Jun 6, 2014
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Abstract
A submersible pump assembly has a centrifugal pump with a number of stages, each of the stages having a rotatable impeller and a non rotating diffuser. The diffuser has vanes, each of the vanes curving radially inward from an outer end to an inner end. The vanes define vane passages between adjacent ones of the vanes through which well fluid flows. The vanes have thicknesses between inner and outer sides of each of the vanes that gradually increase from the outer ends toward the inner ends. At least one pocket is formed in each of the inner sides of each of the vanes. The pockets are open cavities to receive a portion of the well fluid flowing from the vane passages to the diffuser outlet.
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