OG90
Course Contents
Module 1: Subsea Pipeline System Overview and Design Basis
Key Topics
- Subsea pipeline functions, products and offshore field layouts
- Rigid pipelines, flexible pipes, jumpers and riser interfaces
- Pipeline lifecycle from concept to decommissioning
- Key design codes, standards (such as DNV-ST-F101, ASME B31.8) and regulatory requirements
- Route selection, seabed topography data and geohazard screening
- Metocean, soil mechanics, water depth and environmental inputs
- Design basis, operating envelope and complex project interfaces
Module 2: Hydraulic, Thermal and Flow Assurance Design
Key Topics
- Pipeline sizing, pressure drop calculations and capacity assessment
- Steady-state and transient hydraulic behaviour modelling
- Temperature profiles, thermal heat loss and insulation needs
- Hydrate, wax, asphaltene and scale management strategies
- Slugging, liquid accumulation and restart challenges
- Chemical injection, operational pigging and operating strategies
- Flow assurance risks during system start-up and shutdown
Module 3: Mechanical Design, Materials and Corrosion Control
Key Topics
- Wall thickness, pressure containment and hydrostatic collapse checks
- On-bottom stability, free spans and vortex-induced vibration (VIV)
- Global buckling, pipeline walking and thermal expansion management
- Fatigue, fracture mechanics and strain-based design considerations
- Line pipe materials, metallurgy, welding and fabrication quality
- External coatings, cathodic protection (CP) systems and corrosion allowance
- Design reviews for constructability, transportability and operability
Module 4: Installation, Protection and Pre-Commissioning
Key Topics
- S-lay, J-lay, reel-lay and tow installation methods
- Shore crossings, landfalls and subsea tie-in operations
- Trenching, burial, rock dumping and concrete mattress protection
- Installation analysis, lay tension limits and vessel constraints
- Flooding, cleaning, gauging and hydrotesting activities
- Dewatering, drying, nitrogen purging and preservation techniques
- Installation risks, simultaneous operations (SIMOPS) and marine assurance
Module 5: Operation, Integrity, Repair and Decommissioning
Key Topics
- Operating procedures, surveillance and pipeline monitoring
- Maintenance pigging, leak detection systems and pressure management
- Inspection methods: ROV surveys, acoustic surveys, CP and in-line inspection (ILI)
- Defect assessment, anomaly ranking and remaining life calculations
- Emergency repair clamps, spool replacement and diving/ROV intervention
- Pipeline integrity management systems (PIMS), records and KPIs
- Decommissioning options, flushing, bypass and abandonment planning