FIGURE 3-2 Sketch of intended nominal operation of BSR in the Macondo well. Source: DNV 2011a, I, p. 155. Reprinted with permission; copyright 2011, DNV.
FIGURE 3-3 Upper and lower shear blades crushing the drill pipe and beginning the shearing (or breaking) operation. Source: West Engineering Services, Inc. 2004, p. 2-2. Reprinted with permission; copyright 2004, West Engineering Services, Inc.
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3 Blowout Preventer System ."
Macondo Well Deepwater Horizon Blowout: Lessons for Improving Offshore Drilling Safety . Washington, DC: The National Academies Press,
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