3 May 2019
BMT’s subsea Riser Monitoring System successfully supports Equinor’s Aasta Hansteen Spar
BMT is proud to announce a partnership with Sonardyne to deliver to Subsea 7 its proven ‘Riser Monitoring System’ (RMS). This industry-leading subsea integrity monitoring solution has been adopted by the world’s largest spar platform, Aasta Hansteen. The Aasta Hansteen Spar platform is operated and owned by Equinor ASA, the Norwegian multinational energy company.
Located 300 kilometres west of Sandnessjøen on the Norwegian Continental Shelf (NCS) in water depths of up to 1,300m, the deepest field development on the NCS, the Aasta Hansteen Spar is installed in a harsh environment utilising highly robust deepwater Steel Catenary Risers (SCR).
Neil Charles, Operations Director for Offshore at BMT North America commented:
“We are very pleased with the confidence that our client Subsea 7 has shown in our primary expertise related to subsea integrity monitoring. Teaming with Sonardyne on RMS has allowed us to help revolutionise the integrity management processes, and deliver superior reliability and accuracy, for Equinor’s major Norwegian Sea gas field.
“With the installation of SCRs, advanced sensing technologies for use in offshore oil and gas applications, this new RMS will greatly assist the Aasta Hansteen Spar platform with precision planning of maintenance activities and deliver real potential for safe asset life extension. It combines rapid data processing and high-fidelity output with proven analysis expertise, to offer our client’s float-on operation a leading-edge solution to integrity management and drives our innovation in this field.” added Neil Charles.
The BMT integrated RMS includes an innovative suite of strain, motion and position sensors deployed by underwater remotely operated vehicles (ROVs) to monitor the SCR response in the Touch Down Zone (TDZ) and riser interaction with the Spar FPSO pull tube. The computationally intensive data collated by the RMS is used to validate and bring efficiencies to the Spar and SCR design.
With extensive experience in complex SCR Riser Monitoring Systems and proprietary ROV-deployed strain gauge assemblies, BMT has developed a unique underwater ROV installed RMS to monitor the integrity of the riser. This development was thanks to collaboration with Sonardyne who provided an innovative underwater acoustic positioning system that supported the subsea riser monitoring solution.
Photo: credited to Roar Lindefjeld/Bo B
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