Experimental Studies On The Effect Of The
Number Of Stages On The Performance Of
An Electrical Submersible Pump In Two-phase
Flow Conditions
Author(s)
E. Salehi, J. Gamboa & M. Prado
Abstract
The objective of this research is to study experimentally the effect of number of
stages on the overall performance of a multistage ESP. Therefore, a series of
experiments injecting gas at certain stage and monitoring the pressure increment
on stages downstream from the injection point are conducted at different inlet
pressure, and rotational speed. The experimental result reveals that two-phase
performance of a single stage does not directly represent the two-phase ESP
overall performance. However, a strong relationship between two-phase stage
performance, number of stages and the pump overall performance exists.
Results also show that increasing the number of stages extends the operating
region in which every stage equally contributes on the overall pump
performance. This region is bracketed by a critical gas quality that also varies
with the increase of the number of stages. Thus, the prediction of the number of
stage varies depending on the gas quality. At low gas quality the serial pump rule
is suitable for practical application purpose. But, this rule may underestimate the
number of stages at higher gas quality in which the serial pump rule is no longer
applicable.
Keywords: electrical submersible pump, homogeneous rules, surging initiation,
velocity triangle.
Keywords
electrical submersible pump, homogeneous rules, surging initiation,
velocity triangle.
Related Book
Other papers in this volume
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