Abstract: A pumping system includes a plurality of pumps, each having an inlet and an outlet. The inlet is fluidly coupled to a hydraulic fluid reservoir. The outlet is fluidly coupled to a control pod having a valve and a pair of sensors monitoring upstream and downstream pressures of the valve. The control pod is fluidly coupled to a subsea blowout preventer. A first motor is coupled to a first pump of the plurality of pumps and sets the first pump at a first predetermined pressure. A controller is coupled to and configured to control the first motor, thereby controlling the first pump. The pumping system is configured to: engage and disengage each pump independently; and de-stroke each pump to limit pressure to the valve, when a predetermined pressure for each pump is attained, thereby reducing fluid hammer at the control pod.

Abstract: This disclosure includes BOP control and/or power and/or data communication systems and related methods. Some systems use or include a plurality of controllers, each in communication with a BOP control network and configured to transmit information associated with the BOP, and a signal conditioning circuit in electrical communication with and configured to provide a power signal and a data signal to at least one of the plurality of controllers, the signal conditioning circuit including a signal coupler, a subsea signal decoupler, an amplifier, and/or a frequency converter, where each controller is in communication with one or more processors and is configured to transmit at least a portion of the information through the BOP control network during a respective time interval.