Heidrun FSU

Wärtsilä will supply inert gas systems, deepwell pumps and fire water packages to a permanent FSU to serve the Heidrun Oil & Gas Field.

Wärtsilä Moss inert gas systems will also be supplied to two shuttle tankers that will support the FSU. Crude oil output of the field will be loaded to the FSU vessel through subsea pipeline and underwater hoses. The oil will be lifted from the FSU vessel to shuttle tankers through offloading hose-strings.

Wärtsilä Moss inert gas systems prevent the gas mixture in the FSU’s cargo tanks or bunkers from reaching a range where explosions could occur. Inert gas maintains the oxygen content of the tank atmosphere below 8%, thus making the air and hydrocarbon gas mixture in the tank too lean to ignite. 

The electric driven Deepwell Cargo Pumps offer a reliable, safe and energy-saving solution. The pumps are controlled and monitored by a tailor-made, low-voltage switchboard configuration consisting of step-down transformers, redundancy switchboard, frequency converters and a main PLC control panel which provides interface to the overall control system. The Wärtsilä electrical driven deepwell cargo offloading system for the Heidrun FSU offers a configuration that has been optimized for offloading flexibility and reliability as well as for footprint and system efficiency, thus ensuring low carbon footprint
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