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1 - Classification: Internal 2010-09-02
TORDIS SSBI
Acoustic Condition Monitoring
Trond Bertmand
Leading Advisor Subsea Production Control System
2 - Classification: Internal 2010-09-02
Remote Condition Monitoring by use of Acoustic and Electrical field sensors
3 - Classification: Internal 2010-09-02
Tordis IOR Monitoring Module
6 x Underwater Electromagnetic Field Sensor
17 x Acoustic Sensor
4 - Classification: Internal 2010-09-02 Slide 4 of 31
Concept – Remote Sensing
• No Cabling to monitored objects
• No structure mounting of sensors
• Large area and numerous objects monitored with an
array of centrally positioned sensors
• No direct interface to monitored object
• Monitoring system can be replaced without intervention
on monitored objects
5 - Classification: Internal 2010-09-02
6 - Classification: Internal 2010-09-02
Tordis Muliphase Pump,
Measurements
ACOUSTIC SIGNATURE
ELECTRIC FIELD SIGNATURE
7 - Classification: Internal 2010-09-02
Mechanical imbalance and errors
• Different types of errors, appears at known bands of frequency orders for groups of equipment;
8 - Classification: Internal 2010-09-02
Supplier independent CM
9 - Classification: Internal 2010-09-02
120
110
112
113
115
117
118
135
45
60
75
90
105
120
411
1.5
-1.5
-1.0
-0.5
0.0
0.5
1.0
02:000:00
160
150
140
160
150
140
SPL[dB rel uPa]
Naxys AS - Naval Technology
Elapsed time (min:sec)
|SPL|[dB rel uPa]
Bearing[Degrees]
1 2 3 4 5 6
0:16 02:08
CM can be more than single point measurements • Sequence of events during pump shut in
CM can be more than single point
measurements
Summary monitoring experience
− Topside Server Software is ‘prototype’ delivered by Naxys
− Lacking read only acsess
− HMI on new systems is important to ensure utilisation
− As long pumps operate as expected, operators do not interfere (or learn)
• Operation related information is available elswhere
• Current status: not in use
• More focus on Naxys expected in 2012 when replacing pipelines and
rerouting production from field
− Regarded as valuable supplement to basic pump/motor monitoring,
especially with respect to fault finding and potentially preventive maintenance
− High speed communication interface is an absolute requirement
10 - Classification: Internal 2010-09-02
11 - Classification: Internal 2010-09-02
Glenn Harveland
www.statoil.com
Thank you
