| CPC E21B 43/26 (2013.01) [E21B 7/022 (2013.01); E21B 41/0085 (2013.01); F04B 47/02 (2013.01); H02J 3/381 (2013.01); E21B 43/162 (2013.01); H02J 3/14 (2013.01)] | 2 Claims | 

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               1. A system comprising: 
            a power system operationally configured to supply hydraulic power and electric power; 
                one or more fluid conduit assemblies; 
                one or more electric power delivery systems; 
                one or more first banks of frac pumps in closed loop fluid communication with the power system via the one or more fluid conduit assemblies; 
                one or more second banks of frac pumps, each frac pump of the one or more second banks of frac pumps having an internal combustion engine with an electric starter in electric communication with the power system via the one or more electric power delivery systems; 
                wherein the one or more fluid conduit assemblies include a number of isolation valves for controlling flow of pressurized hydraulic oil from the power system to each frac pump of the one or more first banks of frac pumps; and 
                wherein the one or more electric power delivery systems include a number of conducting path controls for controlling the supply of the electric power to each electric starter of each frac pump of the one or more second banks of frac pumps. 
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