Spotlight on New Technology
Schlumberger
Booth # 4331
subC-racs
The subC-racs riser annulus condition surveillance system, a joint development from Schlumberger and Total is an automated system for the monitoring of flexible riser integrity and of vented emissions. The main functions of the system are to measure free (dry) volume of the annulus, and gas and water vapor flow rates. The system provides continuous surveillance of the vent flow and is readily installed in-line with topsides vent systems.
The composition of trapped gas and water vapor can be tested to further support integrity and operational assessments. Trends in the measured free volume, flow rates and compositions provide vital data for integrity assessment of various failure drivers of the riser system. These drivers include high concentrations of dissolved CO2 or H2S, condensation trapped within the annulus, increased flow rates due to a harsh operating temperature or degradation of the pressure sheath, and ingress of seawater through the outer sheath. The subC-racs system provides comprehensive and continuous monitoring and quickly identifies emerging trends in the riser annulus system, before fatigue damage is otherwise suspected.
