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Advances in Mooring Systems – Design, Monitoring, and Integrity Management

Wednesday, 6 May
Room 600
Technical Session
This session highlights groundbreaking developments in mooring technology, design optimization, and integrity management in the offshore industry. Presentations span the full lifecycle of mooring systems—from conceptual design and installation to real-time monitoring, inspection, and replacement. Presentations include industry’s first full mooring system replacement on a deepwater spar in the Gulf of Mexico, demonstrating innovative offshore execution and life-extension strategies; exploration of the next generation of FPSO hull and marine systems designed to enable remote or unmanned operations, supported by new hull concepts that minimize manual inspection and maintenance. Advancements in digital twins and data-driven modeling are highlighted through a hybrid digital twin approach for predicting mooring line fatigue, merging motion-based simulations with machine learning to improve cumulative damage estimation. Complementary studies examine extreme loads and fatigue mechanisms, including insights from scaled dynamic tank tests on out-of-plane (OPB) and in-plane (IPB) bending stresses, as well as the influence of biofouling on drag coefficients of mooring chains. The session also introduces innovative tools and methodologies—such as derivative-free optimization using surrogate modeling and an advanced ROV system for in-situ inspection and repair—to enhance mooring integrity, reliability, and operational safety in an increasingly digital and autonomous offshore environment.
Chairperson(s)
Manoj Jegannathan - Occidental Petroleum Corp.
Peter Leitch, Project Director - Aker Solutions
  • 0930-0948 36802
    Horn Mountain Mooring Replacement - An Industry 1st Full Mooring System Replacement On A Deepwater Spar Facility In Gulf Of America
    M. Jegannathan, S. Aragh, Occidental Petroleum Corp.; B. Thrift, Versabar Inc.; T. Laihomäki, Technip Energies; V. Gowda, Heerema Marine Contractors
  • 0950-1008 36935
    Enabling FPSO Hull & Marine Systems Design For Remote Operations
    G. Singhal, M.A. Danaczko, Wood Group USA Inc; A. Carre de Oliveira, G. Silva, R. Alkmin Freire, Petrobras; L. Garcia, John Wood Group PLC
  • 1010-1028 37025
    A New FPSO Hull Concept Supporting Unmanned Inspection And Maintenance
    M. Moczulski, ExxonMobil Upstream Company; A. Baquet, D. Debroeck, ExxonMobil Technology and Engineering Company; D. Lebreux, ExxonMobil Supply Chain
  • 1030-1048 36927
    Hybrid Digital Twin For Monitoring Of Mooring Line Fatigue Damage: Combining Motions-imposed Simulation With Machine Learning To Improve Cumulative Damage Prediction
    D. Kwon, J. Minnebo, A. Izadparast, J. Chen, SOFEC, Inc; M. Kim, Texas A&M University
  • 1050-1108 36939
    Extreme Loads And Fatique Damage During Installation And Retrieval Of Drag Anchors
    K. Nilsen, Delmar Systems, Inc.; M. Valen, Equinor ASA
  • 1110-1128 36932
    OPB And IPB Stress Effects On Mooring Chain Fatigue Life: Insights From Scaled Dynamic Tank Tests
    Y. Mizushima, The University of Tokyo; Y. Higuchi, M. Harada, ClassNK; M. Takaoka, R. Wada, The University of Tokyo
  • 1130-1148 37148
    Drag Coefficients Of A Mooring Chain Link Under Mussel Biofouling: Test Configurations And Uncertainties
    N. Emamdoost, K. Thiagarajan, Umass Amherst; F. Schoefs, University Of Nantes France; M. Hasan, Umass Amherst; F. Schoefs, University Of Nantes France
  • Alternate 37154
    The Effect Of Non-linear Pile-soil Interaction On Dynamic Wtg Fixed Foundation Analyses
    A. Gupta, WSP USA; G. McDonald, Bentley; A. Desai, S. Sarada, WSP USA
  • Alternate 36858
    Derivative-free Optimization Of Mooring Systems Using Surrogate Modelling Based On Equivalent Static Analyses
    G.R. Domingos, E. Lages, A. Ramos Jr, Federal University of Alagoas; R. Rossi, Petro Expertize; A.T. Oshiro, Petrobras Cenpes; M. Costa De Oliveira, Petrobras
  • Alternate 36968
    Enhancing Mooring Integrity With An Advanced Rov System For Inspection And Repair
    F.H. Costa Filho, Buyl Engineering

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