Offshore windmill installation

Survey Support During Installation of Monopiles and Transition Pieces

Stian Waage, Business Development Manager

Kristoffer Amdal, R&D Manager

• 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

Dimensional Control Position Monitoring

System

Charting and marine

servicesSubsea Metrology

Vessel Sensor Verification

Windmill installation

survey support

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Services Provided

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 Software

• Real-Time Monitoring

software


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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


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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


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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


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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


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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

Thank you !

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Offshore windmill installation

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