Variable speed drive units (VSD) designed specifically for use with electrical submersible pumps (ESP) have been available for several years. The ability to vary the operating speed of the ESP greatly expands the operating range of the unit. To take full advantage of the capabilities of an ESP operating on a VSD, it is necessary to understand the concepts of sizing and the operational limitations of the equipment.

Keywords:
speed performance curve, relation, submersible pump performance, limitation, useful range, artificial lift system, frequency, magnitude, esp, thrust point
Subjects:
Artificial Lift Systems, Electric submersible pumps
Copyright 1985, Society of Petroleum Engineers
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