The V-SLIM is the subsea deployed node in a V-IR System that identifies and locates electrical faults

Problem

With current subsea architectures, subsea power and communications are distributed from a single umbilical to many subsea control modules, each acting as a power consumer and communication node.  The electrical distribution network comprises many electrical cables and connectors all configured in a multi-drop layout with multiple 'spurs' or 'legs'.  

Currently there is no way of monitoring the electrical integrity of each of these cables and connectors individually, and if there is a failure then the only way of fault finding is through intensive intervention and part replacement until the fault disappears. Such an approach is very costly and is reactive only.

Solution

The V-SLIM enabled electrical flying leads are installed at strategic subsea locations, and any associated degradation of the subsea electrical distribution network can be measured and located with analytics. The patented V-SLIM measurement technology does not rely on any in-line electronics or switches. The lines being monitored pass straight through the unit.

Communication between units and to topside are accomplished using either:
• Viper V-NET line to earth interface
• SIIS level 3 Ethernet interface.

Host system communications are unaffected. When a fault occurs its location is evident without the need for diver or ROV operations.

An external diver deployed V-WAND is available as an alternative data recovery and firmware update option.

Key Benefits

  • Provides information to locate electrical faults without the need for an intervention
  • Compatible with existing subsea control systems
  • Minimises subsea intervention costs
  • Mitigates unplanned production loss

Key facts

  • Measure the total system insulation resistance and insulation resistance downstream of the unit
  • Additional measurements parametersn include voltage, current, power factor and insulation capacitance
  • Compatible with single phase AC or DC
  • Patented measurement technology allows wires to be routed directly through the V-SLIM with no in-line electronics or switches in-line
  • Compatible with existing topside IR verification testing activities
  • Adaptable with subsea connectors from various manufacturers