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• The position of the tool joint at or below the closed UA prevented upward movement of the drill pipe. • The upper VBRs were closed and sealed on the drill pipe. • The fow of well fuids was uncontrolled from downhole of the upper VBRs. FIGURE 7 References 1 G.D. Kenny, B.A. Levett, N.G. Thompson, H. Bratfos, and P. Bjerager, "Forensic Examination of the Deepwater Horizon Blowout Preventer, Volume 1," Det Norske Veritas, Report No. EP030842, March 20, 2011. 2 "Forensic Examination of the Deepwater Horizon Blowout Preventer, Volume 2 Appendices," Det Norske Veritas, Report No. EP030842, March 20, 2011. SHANE R. FINNERAN is a project engineer and team leader for the Computer Aided Engineering (CAE) Group under the Pipeline & Facility Risk Management Section of DNV in Dublin, Ohio. He served as CAE team lead for the forensic investigation of the Deepwater Horizon blowout preventer, and was responsible for the 3D laser scanning of recovered evidence, digital forensic reconstruction, and fnite element simulations to analyze the failure scenarios developed throughout the forensic investigation. Finneran holds a B.S. degree in mechanical engineering from Kettering University. investigation of the blowout preventer recovered from the Deepwater Horizon drilling rig failure. He holds B.S. and M.S. degrees in engineering from the University of Alabama–Birmingham and a Ph.D. in materials science engineering from Vanderbilt University. Thompson is a NACE Fellow, NACE Past President, and current president of the NACE International Foundation. NEIL G. THOMPSON, Ph.D., FNACE, is vice president of DNV's Materials and Corrosion Technology Center (MCTC) located in Dublin, Ohio. He is senior advisor for the Forensic Investigation Section and served as project manager for the DOI and DHS JIT forensic BARBARA N. PADGETT, Ph.D., is a senior engineer at DNV's MCTC. She works in the Forensic Investigation Section and served as team lead for the DOI and DHS JIT forensic investigation of the blowout preventer recovered from the Deepwater Horizon drilling rig Final model deformation compared with recovered drill pipe laser scans. failure. She holds B.S., M.S., and Ph.D. degrees in materials science and engineering from The Ohio State University. BRANDON C. ROLLINS, P.E., is a senior engineer at DNV's MCTC. He works in the Forensic Investigation Section and served as a team lead for the DOI and DHS JIT forensic investigation of the blowout preventer recovered from the Deepwater Horizon drilling rig failure. He holds B.S. and M.S degrees in materials science and engineering from The Ohio State University. FIGURE 8 Alignment of scan models—2-in standoff between block. NACE International, Vol. 52, No. 12 December 2013 MATERIALS PERFORMANCE 35