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2022 2nd Alert FAT#2&3 Ejection of tubing hanger with its running tool resulted in 2 fatalities.
During a well operation to restore Well Integrity of a gas production well, the Tubing Hanger ejected up through an open Blow Out Preventer (BOP) together with the a well plug followed by a large release of gas. Above the BOP, two individuals were struck by the combination of ejected equipment combined with the force of gas being released resulting in their loss of life. The well was immediately secured by closing the open BOP and Side Outlet Valves.
All Well Barriers shall be formally qualified Single Barrier Operations shall be only accepted under an Approved Deviation (Management of Change MOC) All variations (Management of Change MOC) to a program shall be reported in writing and formally approved. Having no pressure above a plug (well barrier) alone does not necessarily indicate the barrier is fully verified. All Well Barriers shall be independent & Identified, Verified & Monitored. Well Risk shall be captured within the handover from one team to another.
The plug was set too shallow and assumed to have set correctly due to the fact that it had sealed pressure for a long period of time. Part of the considered Secondary Barrier envelope (BOP) was open to prepare to remove the Tubing Hanger, hence considering it as part of a Barrier at this point in time was not valid until it is closed.
Category:
Second Alerts
Document Type:
Safety
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pptx<br/>
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