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View Diary: 1 June 2010: BP Liveblog ROV Diary 27 - LRMP Continued (345 comments)

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  •  pressure when riser is cut. (0+ / 0-)

    Probably be around 400PSI.   There is a huge pressure drop across the BOP and a much smaller one across the riser which will be lost when it's cut.   So the pressure at the top of the BOP will go down.   The pressure in the jets coming up from the BOP will be lower than the pressure coming out of the crimp and the flow will be perhaps 20% higher than the combined flow of the leaks at the crimp and the leak out the old open end of the rise.

    400PSI was the pressure measured somewhere in the riser a while back.

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