Subsea inspection of vibration and acoustic noise brattebo... · •Subsea inspection of vibration...
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ULTRASONIC INTELLIGENT SENSORS • Subsea inspection of vibration and acoustic noise • Subsea Expo 2017 Baard Brattebø – ClampOn
Transcript of Subsea inspection of vibration and acoustic noise brattebo... · •Subsea inspection of vibration...
ULTRASONIC INTELLIGENT SENSORS
• Subsea inspection of vibration and acoustic noise
• Subsea Expo 2017Baard Brattebø – ClampOn
ULTRASONIC INTELLIGENT SENSORS
FIV (Flow induced Vibration)
o Multiphase flow causing vibration to flow lines, flex loops, etc.
o Medium frequency, typically 2-50Hz
o Vortex shedding
o Slugging
o Turbulence
o Fluttering / Galloping
ULTRASONIC INTELLIGENT SENSORS
FLIP (Flow Line Induced Pulsation)
o Flexible risers or flexible connectors
o High frequency, typically 50-1000hz
Source:
ULTRASONIC INTELLIGENT SENSORS
VIV (Vortex induced Vibration)
o Ocean current causing low frequency vibration to structures, flow lines, jumpers, risers etc.
o Low frequency, 0,01 – 2Hz
ULTRASONIC INTELLIGENT SENSORS
Structural and CFD modellingo Structural and CFD Modeling
o Identify areas of criticality
o Design to minimize risk of vibration
o Calculate vibration force and fatigue rate
o Calculate safe operational window
ULTRASONIC INTELLIGENT SENSORS
Monitoring
o Actual monitoring combined with CFD.
o Monitor in areas of criticality
o Verify vibration force at different operational conditions
o Data from one location -> CFD = Knowledge of complete sections.
o Calibrate models
Vibration monitor
ULTRASONIC INTELLIGENT SENSORS
Microelectromechanical systems
Mite on top of MEMS mechanic
o Accurate
o Sensitive
o Power friendly
o Very Small
ULTRASONIC INTELLIGENT SENSORS
o Real-time data
o Instant alarm
o Always present
o Data from 0-day
o Fatigue estimate
o No running costs
o SIIS L2 and 3
Permanent/Integrated solution
Monitor installed on 2” injection line
ULTRASONIC INTELLIGENT SENSORS
Temporary / inspection
• Stand-alone
• No integration
• Internal battery
• Up to 6 month operation per charge
• Local indication
• Light weight
• Mechanical and magnetic fixtures
• No bandwidth restrictions
• Continuous raw data logging
ULTRASONIC INTELLIGENT SENSORS
Phase relationship
ULTRASONIC INTELLIGENT SENSORS
ULTRASONIC INTELLIGENT SENSORS
LPHP (Pure vibration monitor)
ULTRASONIC INTELLIGENT SENSORS
ULTRASONIC INTELLIGENT SENSORS
Field Case – Statoil – Oseberg DIIPotential risk of singing flexible
Risk of resonance on 2” injection line on P template
3 weeks delivery time
Permanent installed
30 years design life
TR requirements
Installed on template 30th May
Template mobilization date 1 June
ULTRASONIC INTELLIGENT SENSORS
Field Case – Statoil – Oseberg DIIVibration monitor location
ULTRASONIC INTELLIGENT SENSORS
Permanently installed on flow lines 2”
Material instrument: Titanium gr2
Material fixture: Titanium gr2, peek sleeve
Isolated from CP
Oil filled harness docking station
Field Case – Statoil – Oseberg DII
ULTRASONIC INTELLIGENT SENSORS
Field Case – Statoil – Oseberg DII
Instrument installation
ULTRASONIC INTELLIGENT SENSORS
Field Case – Statoil – Oseberg DII
Docking/interface installation
ULTRASONIC INTELLIGENT SENSORS
Conclusion
• Important tool for verification of actual vibration forces
• Ideal for permanent monitoring on critical components
• Reliable
• Rapid installation and retrieval
ULTRASONIC INTELLIGENT SENSORS
Thank you for your attention!
Any questions?
Baard BrattebøClampOn
www.clampon.com
