Cause & Consequence
- Uncontrolled release of a flammable gas or liquid
Specific Incident Equipment
- Due to the fact that pressure gauges indicated zero it was assumed that no gas would be in the fluids and therefore no hazard of hydrocarbon release was present.
- The procedure did not include the possibility of small quantities of gas being trapped and venting off.
- Communication was inadequate between those performing the task and site management. This resulted in the OIM manually imitating a process shutdown.
If applicable amend procedures for well slot recovery programmes to ensure they capture the requirement to open the through choke to the poorboy degasser prior to opening any closed BOP function.
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