Safety Alert
MODU Unlatched from Well
MODU Unlatched from Well
- IADC
- Safety Alert
- IADC Alert 24-3
- Marine OperationsVessel and Mooring
- Loss of station keeping
- Mooring operations
- Mooring lines
- Evacuation, escape and rescue
- Upstream oil and gas
- Offshore installation
Summary
A moored semi-submersible drilling unit without dynamic positioning assist disconnected from its well and moved towards survival draft as storm conditions increased. Over three days, it lost four of eight mooring lines and drifted approximately 800 metres. Non-essential personnel were removed after the fourth line was lost.
Classifications: Loss of station keeping; drive-off; drift-off.
Classifications: Mooring operations; berthing; unmooring.
Classifications: Mooring lines; mooring rope; mooring wire.
Classifications: Evacuation, escape and rescue; EER; escape and rescue.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.
Summary
The alert concerns a mobile offshore drilling unit becoming unlatched from its well.
IADC Alert 24-3. Themes: marine operations, vessel and mooring.