IWOCS Refurbishment

About Project


TEK-Ocean refurbished and modified an intervention workover control system (IWOCS) to suit the requirements for a subsea plug and abandonment campaign.

About Project


  • Refurbish IWOCS hydraulic power unit (HPU).
  • Modify HPU to work at lower specified working pressures.
  • Refurbish IWOCS umbilical reeler and repurpose a 24-core umbilical for a suitable water depth.
About Project


  • HPU:
    • Install new LP/MP and HP accumulators and pre-charge with nitrogen.
    • Change out all filters and strainers.
    • Reset all pressure relief valves to new set pressure.
    • Re-instate coating, rigging, and offshore certification.
  • Reeler:
    • Spool on repurposed 24-core hydraulic umbilical and terminate ends.
    • Extend reeler panel to accommodate additional hydraulic lines.
    • Change out multi quick connect (MQC) stab plate for project specific MQC.
    • Flush and pressure test umbilical in accordance with API.

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