METHOD FOR CONTROLLING MULTIMACHINE COMPLEX OF RESERVOIR PRESSURE MAINTENANCE SYSTEM Russian patent published in 2013 - IPC E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: method implies drawing base head-capacity and energy curves for main and charging pumps and further on while in service by comparing continuously the head-capacity and energy curves to the reference for all the pumps of all the cluster pump stations (CPS) parallel-working for high-pressure water conduit system; that is followed by specifying an optimal number of simultaneous running main pumps with their head-capacity and energy curves to be matched within an optimal efficiency by changing a rotation frequency of their electric drives thereby avoiding throttle elements to be used. Additionally, an input and output pumpage temperature is measured, and a rotation frequency of the electric drives of the low-pressure charging pumps is adjusted herewith controlling specific energy consumption for all the main pumps. If the hydraulic and energy values appear to fall outside the limits of critical values for any main pump of all the parallel working CPS to be switched to a standby pump the technical characteristics of which enable matching the head-capacity curves of the main pumps within the optimal efficiency.

EFFECT: higher controllability of the technological pressure maintenance system, expanded range of the pump adjustment and more flexible reservoir stimulation, reduced specific energy consumption if it is necessary to maintain the energy curves of the pumps within the optimal efficiency.

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