Page 31: of Offshore Engineer Magazine (Mar/Apr 2017)

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Tightly packed: inApril’s node system.

Walker thinks perma-

SUBSEA nent systems will be an inef? cient use of a capital asset.

Retrievable systems, compared to permanent systems, offer more ? exibility and scalabil- ity, Steen-Hansen says. “You can have ? exibil- ity in survey design, if you want it bigger

Light packaging: inApril’s node and or smaller, depending node system. Photos from inApril.

on how the reservoir

MASS en-MASS Flying nodes develops and scale it accordingly,” he

As part of a joint development project There are also systems in development says. “You’re also not locking yourself with Shell, Magseis is working on a that wouldn’t need any type of vehicle or into one technology for a long period of system to deploy MASS technology cable for deployment – so-called ? ying time.” in ultra-deepwater with positioning nodes. OE covered Autonomous Robotics Either way, OBN technology seems accuracy for 4D work, using a towed Ltd’s (ARL) ? ying nodes concept last year here to stay. “The future is on the sea-

OE subsea vehicle, from which the nodes ( : February 2016). The concept stage ? oor,” Walker says. “I joke that, when are automatically deployed. A full-scale for ARL’s system is complete and a teth- people join seismic vessels in the future, pilot test in >1200m water depth was ered version of the ? rst prototype ? ying people will say to them ‘you know they completed in Q3 in a Norwegian fjord. node will start in water testing during used to tow sensors.’”

Steen-Hansen says that ? rst commercial 1H 2017. Seabed Geosolutions is working operations are planned for 2018. on a similar product, dubbed spicerack

FURTHER READING “We recognize that for deepwater and nodes, with Saudi Aramco.

Making nodes ? y certain types of deployment, ROV could Another alternative is using nodes for

OE [ : February 2016] be a good solution,” Steen-Hansen says. long-term, or permanent reservoir moni- http://bit.ly/2kJvKwM “But, if we really want a step change, toring. However, with the increased ef? - something else is needed.” ciency of today’s node laying operations,

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