real time monitoring for oil production and drilling
TRANSCRIPT
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Real time monitoring for oil production and drilling
By Tor Inge Waag, Dr. IngSensorlink AS
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About Sensorlink
• Sensorlink is a Hi-Tech company
– concentrating on real time monitoring
of important data for oil production and
drilling.
• Our products can be accessed in real
time from offshore and onshore locations
– enabling field and office teams to
share data and make joint decisions
quickly.
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About Sensorlink
• Established in 1997– Trondheim, Stavanger, and Houston
• High level of technical competence and experience– Electronics, physics, acoustics, IT,
signal processing, mathematical modelling, materials and production (corrosion)
• Cooperation with NTNU, thesis work(good place for recruitment !)– Master students– PhD students
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Sensorlink technology
• ELF (electromagnetic
Extremely Low Frequency)
system for through steel wall
communication
– Spin-off: Pistontrack,
an accumulator monitoring
system on floating rigs
• Ultramonit, multichannel
ultrasound for monitoring
purposes
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UltramonitTM – what is it used for
• Real time corrosion and erosion monitoring
• Benchmarking of results from other inspection methods
• Monitoring of found defects• Effects of corrosion inhibitors• High resolution
– detects corrosion rates of 0.1 mm per year or better
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Ultrasound
• Sound waves with frequencies higher than 20kHz
• Applications: – Medicine (ultrasound imaging,
intravascular flow measurement, tissue characterization)
– NDT (thickness measurement, flaw detection, imaging)
– Flow measurements– etc...
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Ultrasound at Sensorlink
• Direct wall thickness
measurements
• Multiple (hundreds of)
ultrasonic transducers are built into a clamp, shaped to fit the pipe
• New pipes or retrofit
• Real time monitoring
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In-house developed electronics for ultrasound
• Designed for high pressure, marine operations
• Extremely good signal to noise ratio
• Low power consumption
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Datalogger
• The datalogger includes – a mini PC– memory card– batteries
It controls the clamp, records data and provides real time communication
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Transducer design
transducer
Cross section of pipe wall with defect
defect
Wave propagation computed by 2D numerical model
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Ultrasound pulse - echo waveform
thickness = t*c/2
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Data logger Internet
Salt water or added acidNeutral fluid
Steel test sample
Ultrasonic transducer
Plastic sleeve
Ultrasoundinstrumentation
On-line long term laboratory testing
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Three weeks of data, showing the effect on corrosion rate of changing pH
http://www.sensorlink.no
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Pilot installation, onshore gas processing plant
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CO2 corrosion in pipeline bend
7,0
7,5
8,0
8,5
9,0
9,5
10,0
des 6
jan
3
jan
31
feb
28
mar
28
ap
r 25
mai
23
jun
20
jul
18
au
g 1
5
sep
12
Date
Wall
thic
kness [m
m]
Position 0° (upwards)
Position 90° (inwards)
Long term field measurements at processing plant
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Results from the gas plant installation:
• Results in excellent agreement with other NDT methods
• Corrosion was consistently detected, and the pipe was replaced earlier than planned
• The high resolution gives very rapid estimation of corrosion rates, at an accuracy of 0.1 mm/year or better
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Real oil field installation
• The clamp is installed by a Remote Operated Vehicle
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Ultramonit Clamp for a 34” export pipeline
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A whole lot of equipment goes to sea
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Installation completed
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Latest installation, on a 14” water injection riser
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Movie taken by ROV during installation