offshore platform

key advantages

  • Demonstrate that structures are safe
  • Implement best practice in structural integrity management
  • Extend the useful life of aging structures
  • Defer the costs and disruption of decomissioning

The Solution

ROSEN offers a full range of structural integrity management services ranging from management systems to detailed non-linear structural analysis to inspection, maintenance and repair strategies.

Structural Integrity Management (SIM)

  • SIM for fixed and floating offshore platforms, and onshore liquefied natural gas structures
  • Life extension of facilities
  • Development and implementation of SIM processes
  • SIM audit, benchmarking and validation support
  • Root cause analysis (RCA)
  • Technical authority and owners engineering support
  • Development of standard operating procedures (SOP), performance standards, operational excellent management systems (OEMS)
  • Risk assessment and ALARP studies


Analysis & Design

  • In-place, pre-service (lifting, loadout, transportation), dynamic, fatigue and seismic finite element analyses (FEA) using SACS, SESAM, USFOS, Ansys and ABAQUS
  • Pushover based ultimate strength assessment including “wave in deck” assessment and structural reliability assessment
  • Structural retrograde analysis and C.I.T.E. (SIM triad strategies)
  • Wellhead, production and LQ platform topsides and jacket strengthening
  • RBI based “fit-for-purpose” engineering
  • Online monitoring (OLM) integrated multi-modal analysis for accurate platform load and stiffness estimation
  • Structural response analysis and vibration monitoring and assessment
  • Conductor stabilization (swaying/sinking/well growth) assessment
  • Structural support to pipeline stability under internal and external pressures under different loading scenarios
  • Platform rigging/de-rigging studies


Inspection, Maintenance and Repair (IMR)

  • Preparation and implementation of structural topsides and substructure IMR strategies and work-packs
  • Predictive and preventative maintenance
  • Troubleshooting and anomaly management
  • Condition-based monitoring of offshore platforms and onshore LNG plants
  • Risk-based inspection (RBI) and FFS assessment



  • Development and delivery of technical training modules
  • Coaching and mentoring of facilities engineers
  • Competency assessment and assurance



Technology / Know how

Our industry-recognized engineering team has more than 150 years of combined expertise in structure integrity management and in cross disciplines such as metocean studies, geophysics, geotechnics, geomechanics and geomatics as well as structural dynamics monitoring, drilling, grouting and vibrations.

Analysis capabilities:

  • OLM based multi-modal SIA
  • Structural escalation study
  • Staged pushover assessment
  • Gravity pushover
  • Shakedown analysis
  • FEA (Ansys, ABAQUS)
  • WELLCAT analysis
  • Cost-benefit-analysis (ALARP, ICAF, NPV, DPI)

Monitoring/measurement capabilities:

  • Wave radar, current meters
  • Accelerometers, data loggers
  • Strain gauges
  • Load cells
  • GPS tools
  • Geophysical tools