Page 161 - test2

 Scenario 1: Flow from the well forced the section of drill pipe
located between the closed VBR and the closed upper annular up
into the closed upper annular to a point where a tool joint stopped
against the closed upper annular. Wellbore conditions produced
enough force to cause the pipe to elastically buckle in this area.

 Scenario 2: Flow from the well and weight of the unsupported 5,000
feet of 6 5/8 inch diameter drill pipe above the closed VBR forced
the section of drill pipe located between the upper VBR and the
upper annular into an elastically buckled state.

The forces described above, which led to the elastic buckling of the drill pipe,
constituted a possible contributing cause of the BOP failure.

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