抄録
BOP control has been worked without major trouble before this blowout incident. But finally BOP could not be shut in well even though blind shear ram has been activated when blow out occurred. Blind shear ram failed to close completely and seal the well due to elastic buckling between the upper annular and the upper VBR by pushing drill pipe by upward pressure of hydrocarbon flow. This buckling led to loss of well control. This presentation will explain the lessons and countermeasures learned from analysis of sub sea BOP system and well shut in operations of this incident.
