Offshore Installation EquipmentDesign, fabrication and testing of float-over installation systems
Dockwise Yacht Transport
New super vessel; Dockwise Vanguard
Technical details of the new vessel A■ Overall length: 275 m■ Deck width: 70 m■ Hull Depth: 15.5 m■ Water above the deck: 16 m■ Draft: 11 m■ Max. carrying capacity: 117.000 metric tons (DWT)■ Power: 27 MW (diesel electric)■ Propulsion configuration: 2 Main propellers (controllable pitch in HR Nozzle) 2 Retractable Azimuth thrusters■ Speed : 14 knots
Target market A■ Floating production structures: TLP (integrated with topside) Semi’s (integrated with topside) Spar hulls■ Gravity based production structures■ Semi-submersible rigs■ FPSO’s■ FLNG■ Semi-submersible crane vessels■ Vessel dry docking
Why Modularization ? Reducing Risk and Interfaces , while optimizing cost (control )Global Sourcing; More quality More competitionBetter controlled fabricationresults in tighter tolerancesImproved site infrastructure
Optimizing Transport design■ Stowage forms■ Vessel strength■ Load out issues■ Stability■ Motions■ Ballast capacity
Example modular transports -piggyback■ Quick load / discharge of barges■ HTV not tied up for lengthy operations■ Barges can go into shallow ports and rivers
Example modular transports – direct stowage on deck■ Modules trailered or skidded on/off■ Quayheight / waterdepth are critical during loadout
Loadout analysis - skid on Critical parameters: ■ Waterdepth at quay ■ Quay height above water ■ Load spreading in HTV
Load out analysis - roll on Critical parameters: ■ Waterdepth at quay ■ Quay height above water ■ Load spreading in HTV
Waterdepth and quay height
Quay height and tide■ If the quay is to high the vessel can not keep the deck in line with the quay.■ The vessel must ballast fast enough to keep up with the tide.
Seafastening / Structural analysis■ Accelerations during transit are important design factor■ HTV motions much better than tug / barge■ Designing for the right transport vessel can safe a lot of steel in the module
Advantages of Heavy Transport Vessels■ Carrying capacity■ Sailing speed – reduced transit time■ Cargo Safety■ Better motion behavior → smaller accelerations / steel
Safety at sea OCTOPUS Onboard - SPOS with Motion Monitoring■ Voyage Calculations Design Sea-state Loads on Cargo■ Safety limits/margins Statistical data Probability of Exceedence■ What will be encountered in reality?■ How will your vessels respond to waves?
Method – System description■ System description sensor box: sensor:
Purpose and Principles (1)■ Decision Support - provide Master with: expected motion response real-time measurement of accelerations■ Motion Monitoring provide client with actual motion data provide Engineering with data for: validation of engineering tools validation of long term statistics
Purpose and Principles (2)■ Safety increase more decision information for Master more insight in engineering calculation accuracy■ Design improvements reduced design wave? generally accelerations are 50% or more below design values■ Operational costs reduce weather delays
Dockwise Logistical Management Door-2-Door Solutions1. Load-out fabrication yard 2. Heavy Marine Transport 3. Load Off and Land Transport 4. Installation and Site-Assembly
Dockwise Logistical ManagementBenefits Traditional Project Dockwise Logistical Logistics Management Multiple charter parties Single logistical management partner Time chartered vessels Dedicated project vessels including management and engineering Separate onshore/offshore heavy Complete lumpsum D2D haul service agreements transportation solutions Full schedule risk with Owner Manages schedule risk
Why Dockwise ? Reducing Risk and Interfaces , while optimizing cost (control ) Risk Interfaces Cost (control)Decades of track record Manages interfaces with Lumpsum full scope onshore transportation contractingMost experienced PM & Manages third party Economy of scaleEngineering vesselsSelf propelled vessels Accepts full schedule riskAccepts full schedule risk 29
Conclusions and Recommendations■ Early Concept Selection and Transporter Involvement■ Designing Logistics into the Project■ Think BIG Reduce interfaces What limits the size of the modules you can get to site?■ Transport is critical part of the design !!!! Dimensions – which vessels are available ? Check load out facility – can we get in ? Piggyback or direct stowage on deck ? Float on, skid on or roll on ?