ULTRASONIC INTELLIGENT SENSORS

ClampOn Subsea3D Vibration MonitorDIGITAL SIGNAL PROCESSING

ULTRASONIC INTELLIGENT SENSORS

ADVANTAGES

• On board processing anddata storage

• Flexible and quick installationand retrieval

• 3 axis broad range measure-ments

BACKGROUND

In order to minimize risk of fatigue failureof pipes and other structural components,a subsea condition monitoring or inspec-tion tool may be required to keep pro-duction at a safe level. The ClampOn DSPVibration Monitor 3D allows for accuratemonitoring of vibration subsea, both ontemporary or permanent basis. Typical

sources of vibration include vortex indu-ced low frequency vibration (VIV), flowinduced Vibration (FIV), flow inducedpulsation (FIP/FLIP), slugging and more.In combination with advanced compu-ter simulations for flow and structuremodeling, subsea vibration monitoringhas become a valuable tool to monitorthe state of subsea pipework and struc-tures. In several cases the applicationhas enabled the operator to safelyincrease production as the measuredlevel of vibration has been less thanconservative models predict.

OPERATING PRINCIPLE

The ClampOn Subsea 3D Vibration Moni-tor is a flexible tool, designed for tempo-rary or permanent installation on an area

or pipe that should be monitored forvibration. The instrument takes use of3-axis accelerometers, so that any minoror major movement, at high or low fre-quency, will easily be detected andreported to the operator. Data can betransferred in real time, or stored locallyin the instrument for post-processingand analysis.

Short term stand alone kit.

Flow induced vibration on spool piece.

ULTRASONIC INTELLIGENT SENSORS

NORWAY: ClampOn AS, Vaagsgaten 10, NO-5160 Laksevaag, Bergen, Norway, Phone: +47 5594 8850, Fax: +47 5594 8855, e-mail: mail@clampon.com - USA: ClampOn, Inc., 15720 Park Row, Ste. 300 (77084), PO Box 219206 (77218-9206), Houston, TX, USA,

Phone: +1 281 492 9805, Fax: +1 281 492 9810, e-mail: infoinc@clampon.com – WEB: www.clampon.com

INSPECTION MONITORING (SHORT TERM):

• Stand alone or wired to topside• Battery and data logging option• Easy installation and retrieval

KEY SPECIFICATIONS

• Manner of operation• Measurement principle• Design depth• Frequency range• ADC resolution• Antialiasing• Sampling frequency• Noise density• Acceleration range• Max sensitivity drift• Internal Data storage• TRL Level• Data format

Real-time measurement3-axis MEMS accelerometer3048 m ( 10.000 ft)0 Hz to 1000Hz12 bits (1.25 mg /LSB / 3.75 mg /LSB)Digital oversamplingConfigurable, up to 2000 Hz50µg/√Hz2.5 g (default) or 7.5 g (configurable)0.01 %/°C64 GB (maximum)7Continuous raw data from all axes in 16-bit wav formatAveraged FFT spectra with up to 800 lines of resolution andconfigurable upper and lower frequency limits

Magnetic fixture for Valve buckets. Permanently installed.

Phase Relationship.

PHASE RELATIONSHIP

For more advanced monitoring of i.e. apipe section, it is often required to usemore than one instrument to measurethe phase relation between two or morelocations. This will provide detailed in-formation of the movement/displace-ment of the section. To achieve this allthe instruments are time synced.

INSTALLATION

Multiple solutions for installation havebeen developed: For permanent moni-toring the instrument is normally boltedto the pipe or fixture. On temporary inspection type set-up the instrumentcan be installed in brackets containingpowerful neodymium permanent mag-nets, or by ROV Clamps. The optionsare many depending on depth, accessand requirements.

PERMANENT MONITORING(30-YEAR DESIGN)

• Interface to control system• Optional retrievable data logger• Optional wireless communication• Optional long term battery

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All specifiations are subject to change without notice