Joint R&D in JIPs


The offshore industry works closely together to share knowledge, experience and costs. Here an update on the latest Joint Industry Projects. Participants are welcome to join!


SplashMonster Splash Zone Lift Monitoring


Templates, pipe heads, ROVs and other structures going through the splash zone are critical in offshore installation projects. The loading by complex, 3-D waves in the vicinity of the vessel and the dynamic response of the structure suspended from the moving crane tip are difficult to predict reliably. Observing strict safety criteria leads to significant downtime and at many offshore fields, ‘Waiting on Weather’ is a major component of installation schedules and costs.


This JIP is aiming at a better understanding of the wave loading and response of complex structures passing the wave zone. To avoid scale effects, full- scale tests with large ‘smart dummy structures’ will be conducted from an offshore vessel in limiting sea conditions. Both loads and motions will be measured in combination with the 3-D waves and currents. Results will be compared against the current DNV rules, the WINDOS ‘building block’ software and present day CFD models such as COMFLOW and RANS.


Aims of this three-year JIP, which turns ‘SplashMonster into SplashMaster’, and starting now, include: - A practical computational tool for loads on complex structures in the splash zone


- Recommendations for rule development - Best Practice for Engineering & Workability assessment Contact: Henk van den Boom, h.v.d.boom@marin.nl


Offloading Operations Full-scale monitoring of side-by-side offloading


Offloading operations are successfully carried out around the world and are often studied in detail with numerical simulation tools and model tests but comparisons between ongoing operations and study work are limited. This makes it difficult to answer the question about how representative desktop and real- time bridge simulations are for the actual offloading operations. Even if the applied tools contain no errors and the experienced user got all the input right, are we actually calculating the right things?


The Offloading Operations JIP will help answer this question. This involves a comprehensive monitoring campaign on side-by-side offloading from the Sanha FSO. Combined with interviews from people involved in the operation, the project aims to provide feedback for the design and guidance into the operations. Results and findings of the monitoring campaign will be compared to real-time bridge simulations and fast time simulations. An increased understanding will help participants improve the uptime and safety of the operations, especially for new vessel types and sizes. Contact: Arjan Voogt, a.j.voogt@marin.nl


18 report


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