Flexible Riser Monitoring

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Flexible risers

Features & Benefits

Detects armor wire rupture events
Detects anomalies that accelerate degradation
Provides essential data to infer that riser response follows predictions
Eliminates unnecessary maintenance and improves efficiency of inspection
Can detect progressive structural failure allowing preventative emergency shut-down

More Information

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The FLEXASSURE™ flexible riser monitoring system is used to confirm the integrity of the top section of flexible risers by detecting tension wire rupture, measuring top angle (tension) and motion.

System Description

On each riser, a diver installable INTEGRIpod™ is mounted below the bellmouth of the I-tube. The logger continuously measures motion, top angle and acoustic emission from armor wire rupture.

A second INTEGRIpod is mounted on the riser flange that is rigidly connected to the vessel structure measuring motion and acoustic emission.

This allows the difference in measurements across the bend stiffener to be determined. The two pods are hardwired to a topside data acquisition system.

The system can be interfaced to a global positioning system and satellite communication system. Software combines the signals from all the sensors and processes the data using algorithms developed by 2H to detect anomalies, armor wire rupture, VIV, excessive tension and presence of dangerous gases in the I-tube.

Options

Motion sensor to detect VIV
GPS positioning
Sensors installed to detect gas content in the I-tube and on the riser vent valve