offshore windmill installation
TRANSCRIPT
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Survey Support During Installation of Monopiles and Transition Pieces
Stian Waage, Business Development Manager
Kristoffer Amdal, R&D Manager
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• Statoil
• Conoco Phillips
• Subsea 7
• Technip
• Bibby offshore
• GMC Maritime AS
• ENI
• DeepOcean
• Seajacks
• Jan De Nul
• Boskalis
• Fertoing
• Kongsberg
• BP
• VARD
• Kleven Verft
• Aker Solutions
• National Oilwell Varco
• Saipem
• Ocean Installer
• TDW Offshore Services
• EMAS AMC AS
• DOF Subsea
• Aibel AS
• Lundin Norway AS
• MMT AB
• Maersk
• Petrobras
Client list
207.04.2016
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Dimensional Control Position Monitoring
System
Charting and marine
servicesSubsea Metrology
Vessel Sensor Verification
Windmill installation
survey support
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Services Provided
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64/7/2016
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What We DO
Data ProcessingData Acquisition
Reporting
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Survey Support offshore windmill installation
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• Javad GNSS antenna
• MRU 5
• Octans
• Totalstation
• PMS™ Software
• Radio Link system
• Personnel
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Survey Support offshore windmill installation
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• Survey Software
• Real-Time Monitoring
software
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Survey Support offshore windmill installation
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• Real time monitoring
• As installed report
• Final report
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Offshore wind mill installation - survey challenges
The challenges may be:
• Access
• Accuracy
• Position
• Inclination
• Orientation
• Automatic data transmitting
• Equipment
• Guiding
• Instant reporting
• Live / real-time monitoring
• Mobilization time
• Offshore surveying
• Safety
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Monopile Installation
• Positioning
• Global position (GPS)
• Verticality (Total station)
• Elevation (GPS)
• Crane monitoring during uplift (Two total stations online)
• On line monitoring during piling
• With ParkerPMS™
• Documentation
• Final report with position, elevation, roll and pitch
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Offshore windmill installation – TP - survey challenges
Our solution had to meet these specifications:
Heading / Orientation: Better than 2,5 degrees
Roll and pitch / Inclination: Better than 0,25 degrees
Jacking advice: To meet the specifications
Reporting: Immediate report after ”set down” plus final report
Logging: Store all data to enable post processing if required
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We decided to use:
• GPS / Glonass for heading
• Glonass option added due to obstructions and demand for 100% continuous monitoring
• High precision inclinometer for roll / pitch (Inclination) (and heave) – we used MRU 5• Heave option added for post processing if unexpected heave occurred
• Later we added Gyro with motion sensor
• 2,4 Ghz radio link• 2,4 Ghz does not require license
• ParkerPMS™ for data presentation and complete data logging
• In house software system adapted for the monitoring and reporting
Offshore windmill installation – TP - survey challenges
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Offshore windmill installation – TP - survey challenges
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• GPS equipment mounted onboard on top of TP before lifting
• Inclinometer aligned on top of TP flange before lifting
• Gyro and motion sensor aligned on top of TP flange before lifting
• Radio link mounted and communication to monitoring computer tested prior to lifting
Offshore windmill installation – TP - survey challenges
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• Lifting starts
• Setting of TP on to mono-pile starts
• Parker crew continuously advising to get the heading perfect
• Parker crew continuously advising the jacking operation to get the inclination perfect
• After TP has been ”locked” a verification survey was performed
• Final report issued
Offshore windmill installation – TP - survey challenges
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Achieved target
Heading / Orientation: Better than 0,5 degrees – (Better than 2,5 Degrees)
Roll and pitch / Inclination: Better than 0,05 degrees (Better than 0,25 degrees)
Reporting: Immediate report after ”set down” plus final report
Logging: Data stored. Post processing (heave check) required a few
times
Offshore windmill installation – TP - survey challenges
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Reporting & Real Time monitoring
Monitoring, jacking assistance and reporting:
Report example
VESSEL / COMPANY CLIENT
xxxxxx xxxxxxx
LOCATION OPERATION DATE
Transition Piece:
xxxxxxxxxXX.XX.XXXX
DESCRIPTION
Transition Piece Attitude
Transition Piece Heading
Actual TP heading 43.0º True
Target TP heading 42.6º True
Intended - Actual -0.4º
Transition Piece Inclination
TP Inclination 0.02º
TP Inclination Direction
(relative to local North)158.83º
TP Pitch (local North up
positive)0.02º
TP Roll (local East down
positive)0.01º
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Thank you !
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