Patent ID: 9719523
Date: 2017-08-01
CPC Classifications: F04D

Claim:
1. An electric submersible pump (ESP) assembly comprising: a single shroud coupled to a bottom side of an impeller, wherein a top side of the impeller is open to a diffuser with a fluid homogenizing clearance gap between the impeller and the diffuser between about 0.060 inches and about 0.180 inches wide; at least two untruncated vanes extending substantially upstream from the single shroud and helically along an axially extending hub of the impeller, wherein each of the at least two untruncated vanes has an untruncated vane chord length; at least two truncated vanes extending substantially upstream from the single shroud and helically along the axially extending hub of the impeller, wherein each truncated vane sits at a mid-pitch location between two of the at least two untruncated vanes; and wherein the at least two truncated vanes extend from an outer circumference of the single shroud and each truncated vane has a truncated vane chord length greater than 50% and less than about 75% of the untruncated vane chord length as measured from the axially extending hub of the impeller.