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1. (WO2018106225) POWER SEQUENCING FOR PUMPING SYSTEMS

Pub. No.:    WO/2018/106225    International Application No.:    PCT/US2016/065343
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Thu Dec 08 00:59:59 CET 2016
IPC: F04D 13/12
F04D 13/06
F04B 23/04
F04B 15/02
F04B 47/00
E21B 43/12
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: REID, John, Carl
CHRETIEN, Alexander, Simon
Title: POWER SEQUENCING FOR PUMPING SYSTEMS
Abstract:
A pumping system pumps material or fluid, for example, downhole to perform a stimulation operation. A pumping system may comprise multiple pumps that must be powered-up in a sequence that does not overload a power source. A variable frequency drive may be coupled to a pump via a motor and may adjust the speed of the motor to control the rate of pumping of fluid from the pump. A soft-starter may be coupled to a pump via a motor to provide a constant pumping rate of fluid from the pump. A power-up sequence may be determined that provides power to the variable frequency pump and the soft-starter to power-up the corresponding motors such that the power source is not strained or overloaded. Mixing variable frequency drive driven pumps with pumps driven by a soft-starter may provide an efficient use of available power, conserve space, allow for control over a pumping rate of fluid and reduce costs.