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cable in daisy chain to power the subsea control of this system could not have written to enable a battery solution, he wells at Johan Castberg (OE: August been done with electro-hydraulic actu- adds. 2016), reducing cost and complexity. ated valves, due to the high complexity Another more practical piece to the and valves,” he adds. “It also re- and valves,” he adds. “It also re- puzzle is chemical supply for injection.

Electric enabler duced umbilical and topside cost.” duced umbilical and topside cost.” Taking away the hydraulic umbilical

SUBSEA

However, it isn’t just about lower- However, it isn’t just about lower- is one thing, but you would still need ing cost, Eidesen says. DC ? ber ing cost, Eidesen says. DC ? ber chemical lines. However, a number of

Changing the mindsetChanging the mindset

But, there’s still the mindset optic, for example, is a lean optic, for example, is a lean But, there’s still the mindset people are working on subsea chemi- challenge. “To me the big, system that can enable tie- system that can enable tie- challenge. “To me the big, cal storage and injection, Curran says, important question is that back distances of 300km or back distances of 300km or important question is that including Total. it’s not the technology [that more, he says, and is inde- more, he says, and is inde- it’s not the technology [that “We need to break the paradigm of hinders development], it’s pendent of subsea produc- pendent of subsea produc- hinders development], it’s everything being connected together by the choice of philosophy tion system supplier because tion system supplier because the choice of philosophy cables,” Curran says. “With the advent and accepting new phi- it offers an open channel. it offers an open channel. and accepting new phi- of wireless systems and long battery life losophies,” Søgård “It provides the power “It provides the power losophies,” Søgård of up to 10 years, it is now much easier necessary to power necessary to power says, to add sensors later and gain the mea- electric actuated which surements you need.” valves and even can often Achieving the all-electric tree could small chemical be driven open up new possibilities, he says. injection pumps,” by just “Suddenly you step across this line and one individual in an Eidesen says. “It one individual in an there are so many things possible that organization. can power AUV (autonomous can power AUV (autonomous organization. weren’t possible before or were near to “Sometimes conserva- underwater vehicle) systems, underwater vehicle) systems, “Sometimes conserva- possible. tism can get in the way,” seismic cable grids or environ- seismic cable grids or environ- tism can get in the way,” “It’s about how to make subsea cost ef-

Eidesen says. The industry mental monitoring systems. mental monitoring systems. Eidesen says. The industry ? cient at $50/bbl, breaking the conven- should take care not to There’s a lot to it apart from There’s a lot to it apart from should take care not to tion of having to have dual ? owlines. It’s standardize too much so powering. And it is proven in powering. And it is proven in standardize too much so also life of ? eld extension, the ability to that all-electric is hin- telecommunications. telecommunications. that all-electric is hin- wirelessly recharge AUVs without hav-

A high voltage subsea “In the case of Åsgard sub- dered, he warns. Failsafe ing to dock to connectors, which WFS electrical actuator, sea compression, the process standards should also be can achieve.” from Aker Solutions.

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