Case Study: Subsea pump Pump Condition Monitoring
Transcript of Case Study: Subsea pump Pump Condition Monitoring
Pioneering Innovation in Optical Fiber Sensing Pioneering Optical Fibre Sensing
Case Study: Subsea pump Pump Condition
Monitoring 2007-2010
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Partners: Smart Fibres, Flowserve, SKF, Teledyne ODI Project Sponsor: Shell Upstream Americas – Deepwater Platform: Subsea twin-screw pump and motor Objective: Develop fibre optic condition monitoring Why fibre: Harsh environment, no subsea electronics
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18 motor temperature sensors
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Pump lube oil pressure & temperature
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Bearing housing tri-axis acceleration
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Bearing condition monitoring (with SKF)
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Bearing loads match FE model within 5%
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10 kHz raw data. Odd signal on one roller
Enveloping shows defect. Time period = cage speed
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Enveloping of FFT
Healthy bearing
Damage bearing
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Data analysis predicted: 3.0 mm scratch length, minimal scratch depth
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Inspection found… 3mm scratch length, and 2 micron scratch depth
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Image c/o Shell
on a bearing inside here
visible on an instrument here
A 2 micron scratch here
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