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CSB report on Deepwater Horizon BOP

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Course Credit: 0.15 CEU, 1.5 PDH

On June 5, 2014, the U.S. Chemical Safety Board (CSB) released its report on the Deepwater Horizon blowout preventer. Failures in this last physical barrier preceded the Macondo explosion, fire, and ensuing oil spill. This webinar will discuss analyses contained within the technical appendices that accompanied the CSB report whereby the CSB had access to all three phases of the BOP failure analysis data. Most of the major reports, except Transocean’s, were either published before the final third phase was completed or did not have access or address the full set of data. Details that emerged in the third phase of testing are imperative to understand the failure of the BOP to seal the well.

The webinar discussion will include how the incident unfolded, causes, contributing factors, and lessons to be learned. Additional organizational and operational failures were identified by the CSB and included in the main CSB report (, but are not topics addressed in this webinar.
Presented by Stan Christman.
Following are the particular subjects:

• Dynamic flow simulation results and a comparison with real time data (drill pipe pressure, returns flow, hookload)
• Well integrity failure during the initial displacement for the negative pressure test
• Negative pressure test interpretation
• Development of well flow during the final displacement
• BOP actuations by the crew; failure of the annular and sealing by a pipe ram
• Buckling of the drill pipe and effective compression technology
• How off-center buckled pipe prevented the blind shear ram from sealing
• BOP deadman system problems and likely actuation
• Possible impacts of friction from a closed pipe ram
• Blind shear ram shearing capability
• Use of BOP pressure sensors
• BOP accumulator capacity

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Course Chapters

  • 1CSB report on Deepwater Horizon BOP - Chapter 1
    Media Type: Video


Earn credits by completing this course0.15 CEU credit1.5 PDH credits


Stan Christman