Sea Technology

FEB 2018

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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44 ST | February 2018 www.sea-technology.com Subsea Power Systems Testing The first full-scale prototype of a subsea variable speed drive has been successfully tested in a shel- tered harbor in Vaasa, Finland, taking the vision of an all-electric subsea processing facility one step closer to reality. A variable speed drive is needed to boost the produc- tivity of oil and gas processes and improve energy efficiency while providing the highest reliability. The test is the latest in a five-year joint industry project (JIP) between Statoil, Total, Chevron and ABB that aims to develop transmission, distribution and power conversion systems for subsea pumps and gas compressors operating at depths of 3,000 m and over vast distances. By providing the large power needs closer to the reservoir, production improves due to the increased flow and pressure of the stream. The sub- sea variable speed drive designed for subsea gas compression was operated over three weeks in 2017, in a back-to-back configuration di- rectly with the grid, without motor loads. This "power-in-the loop" test means that only a few hundred kilo- watts of losses need to be supplied from the grid. Following the success of the test, the JIP is now preparing for a 3,000- hour shallow-water test of a subsea power system with two variable speed drives in parallel, combined with subsea switchgear and con- trols, to start late 2018. The first in- stallation of the new subsea power systems in offshore production sites is expected to begin in 2020. Push to Digitalize Offshore Supply Chain Kongsberg Digital is purchas- ing a 34 percent ownership share in NSG Digital, a subsidiary of the supply base and logistics company NorSea Group, which is controlled by Wilhelmsen and is joining forces with Kongsberg Digital to digitalize the supply chain in the oil and gas and offshore wind industries. Kongsberg Digital and NSG Digital have collaborated since the beginning of 2017 on developing a new logistics system called NSG E2E. NSG E2E (end-to-end) is offered as a part of Kongsberg Digital's ap- plication platform, Kognifai, and is a solution that improves logistics management through increasing in- formation sharing and collaboration in the supply chain. Wireless Diver Body Temp Monitoring System WFS Technologies Ltd. of Ed- inburgh, Scotland, has partnered with EERS Global Technologies Inc. of Montreal, Canada, to develop Seatooth, the world's first under- water wireless ear-based core body temperature monitoring system for divers. Seatooth comprises a cus- tom earpiece with integrated tem- marine electronics

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