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14" & 8" Riser Entanglement Incident – June 2025

📑 5 slides 👁 11 views 📅 2/19/2026
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Incident Overview

Rig move to WEB platform faced sea condition challenges, causing vessel mispositioning.

Incident Overview
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Wire Entanglement & Propeller Issue

  • Transfer to MV 212 resulted in wire wrapping around Aether’s propeller, creating six loops.
  • Approximately 105 meters of wire with an 85-ton shackle was involved in the incident.
  • Operations delayed until divers could cut the entangled lines from both sides.
Wire Entanglement & Propeller Issue
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Diver Findings & Riser Impact

  • Later dives revealed three spools of wire around the 14" riser flange.
  • Slack wire at 18m depth and vessel maneuvers likely caused the entanglement.
  • Unconfirmed note of a possible 4" line shift, with no underwater visual evidence.
Diver Findings & Riser Impact
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Corrective Actions Taken

  • Additional marker buoys installed to prevent future entanglement risks.
  • Wire cutting and release operations conducted to free the riser and vessel.
  • Enhanced protocols for wire handling and positioning during adverse weather.
Corrective Actions Taken
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Lessons Learned

  • Critical need for precise wire handling and vessel positioning in rough seas.
  • Weather constraints significantly impact diver availability and emergency response.
  • Proactive measures like marker buoys can mitigate similar incidents.
Lessons Learned
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