High Pressure Pumps

These are the pumps which take the fluid from the mix tank and transfer it to the accumulator bottles, under pressure, where it is stored ready for use by the system. Typically, three air powered and two electrically powered pumps are used. During normal operation the electric pumps are used to recharge the system. However if these cannot keep up with demand, or fail in some way, then the air powered pumps can assist or take over completely.

The electric pump assemblies consist of a heavy duty triplex reciprocating plunger pump with a chain and sprocket drive and powered by an explosion-proof motor. Pump capacity should be such that they can charge the system accumulators from their pre-charge condition to their maximum operating pressure in less than 15 minutes. See Section 9.1.4 below for calculations involving accumulator and charging pump capacities.

SECTION 9 : SUBSEA BOP CONTROL SYSTEMS & MARINE RISER SYSTEMS

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