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Unformatted text preview: ome combination thereof, led to elastic buckling of this pipe inthis location: 155 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. 156 XIV. Regulatory Findings This section addresses regulatory requirements that were in effect on April 20, 2010. 394 Under the Outer Continental Shelf Lands Act (“OCSLA”), the Secretary of the Interior is authorized to manage and regulate the leasing, exploration, development, and product...
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