This is an interesting and detailed animation of the sequence of events that
eventually led to the
failure of the Blow-Out Preventer (BOP) and subsequent flow of crude into the
Gulf... They include
pictures of the actual failed components which provided the clues to piece
together what happened.
The BOP is a 6-story tall, 300 ton assembly designed to handle pressures up to
15,000 psi. It has
redundant computer systems which did trigger and attempted to seal off the well
pipe after losing
comms with the surface drilling platform.
http://www.deepwater.com/fw/main/Blow-Out-Preventer-(BOP)-1079.html
-Mark N. Iverson
markiver...@charter.net