Alert 03 – 51 Trapped Pressure in Annular Results in a Near Miss


While undertaking maintenance on a 13 5/8” 10K Annular Blowout Preventer, one of four pull down bolts had been removed and removal of the second was underway when the annular cap was suddenly ejected from the annular body a distance of 4 to 5 ft up from the assembly. The cap landed slightly off centre back on top of the annular. The three remaining pull down bolts were sheared when the cap was ejected. There were no injuries to personnel.

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