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Unformatted text preview: elastic buckling, DNV concluded that, based upon the physical evidence of the drill pipe, wellbore, and the BSR blocks, the drill pipe became trapped between the BSR faces, which prevented the BSR from fully closing. 343 See Figure 12 below. DNV found that these conditions likely occurred “from the moment the well began flowing and would have remained until either the end conditions changed (change in Upper Annular or Upper VBR state) or the deflected drill pipe was physically altered (sheared).” 344 Testimony of Daun Winslow, Joint Investigation Hearing, August 23, 2010, at 452. Addendum to Final Report for United States Department of the Interior – Bureau of Ocean Energy Management, Regulation and Enforcement – Forensic Examination of the Deepwater Horizon Blowout Preventer (April 30, 2011) (“Addendum to DNV Report”) at 11. 344 DNV Report, Vol. 1 at 4. 342 343 140 Figure 12 – Off‐center drill pipe (Source: DNV) 2. Activation of the Casing Shear Rams During intervention efforts, on April 29, the dri...
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This note was uploaded on 01/18/2014 for the course BEPP 305 taught by Professor Nini during the Fall '11 term at UPenn.

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