1. Edit this text for your title Edit this text for your sub-title Presenter name, location, date etc. MEK 4450 Marine Operations Kværner ASA / DNV, UiO, Fall 2012

2. About ourselves Helge Johnsgard PhD applied Mathematics, UiO Kværner Jacket technology Elisabeth Gjølmesli Master of Science, Boulder, Colorado & UiO DNV Riser Section

3. Summary of the course Brief introduction to marine operations Examples taken from three fields Brief description of project challenges Some simple analytical models Brief introduction to main numerical tools

4. Summary of the course WEEK 1WEEK 2 1. LectureIntroduction to marine operations and project engineering Platform installation 2. LectureLaying of flexible pipes and cables Drag, added mass, Morisson equation Spring-mass 3. LectureSubsea module liftingHydrostatic model Frequency domain hydrodynamic Time domain analyses

5. Typical marine operations

6. OIL COMPANY OIL EPC contractor T&I contractor National regulations Insurance company Warranty surveyor 3. Party verification

7. Project phases Early phase Key personnel Familiarization Identify critical activities Main planning phase Production of documents and drawings Purchase and produce equipment and tools Marine operations Mobilization Load-out Transport Installation De- mobilization

8. Your responsibility Ensure proper margins for…. Motions Forces Stability Accessibility ….induced by Static configuration Operational actions Environmental forces Interface Operational planning Procurement Client

9. Motions & clearances Shackle  pad eyes, chain links Lifted object  deck modules Towing wire  corners of towed object Vessel  platform leg openings Deck layout, seafastening Production tolerances Pendulum motion in crane Vessel motions Guiding Openings Impact loads

10. Forces & structural capacity Forces in guiding systems Forces in lifting or tugging wires Loading of vessels and structures Local and global loads Bending and tension of cables Safety factors Material quality and sertificates

11. Stability & capacity Vertical Center of Buoyancy (VCB) Vertical Center of Gravity (VCG) Water plane area Slack tanks (partly filled) Contact forces (e.g. between vessels) Airfilled compartment (compression of air) Body interaction (e.g. crane/vessel) Checks: Sufficient load capacity? Capsizing?

12. Weather sensivity Given design => proper engineering => given operational condition Uncertain weather forecasts => Alpha factor Waiting on weather (Who’s paying? ) How to establish the actual weather conditions?

13. Typical challenges Contract loyalty & honesty Interpretation of rules and regulations Sufficient time and resources for analysis