Key words:

  • Gulf of Mexico
  • Subsea
  • Blowout Preventer
  • Reliability
  • Well Kick


2010 blowout and subsequent spill from the Transocean Deepwater Horizon Mobile Offshore Drilling Unit(MODU) in the US Gulf of Mexico Outer Continental Shelf (OCS))

Deepwater Blowout Preventer (BOP) Reliability & Well Kicks

Since 1983, Sintef & Exprosoft have documented results from a number of detailed reliability studies of Blowout Preventer Systems (BOP). The objectives of this study was to:

  • Ensure that the deepwater drilling business keep up the focus on the importance of BOP reliability and kick prevention
  • Establish an overview of BOP stack layout for the various rigs, and further to highlight differences.
  • Establish an overview of the various emergency control systems
  • Present the deepwater BOP reliability time dependent trends.
  • Highlight the impact of new equipment on the BOP reliability

«The quality of work performed by contractor was very high, illustrating strong knowledge of the subject matter, through analysis , and clear reporting of findings and result»

BSEE, 2012

Project Outcome:

  • Updated reliability overview of deepwater subsea BOPs world wide.
  • Quantification of the deepwater well kick frequencies
  • Important parameters contributing to the deepwater kick frequency

Estimated value:


Defined improvement potential of 4% drilling downtime due to BOP failure