Factoid: If you assume that there is over 5,000 psi of downhole pressure at the BOP—and everything I have heard indicates it is probably substantially higher than that—then a 1/4 inch diameter hole is large enough to “leak” 5,000 barrels a day. That “leak” would probably cut off your arm if you passed it in front of it.
http://www.theoildrum.com/node/6444 This has been posted some where..great article...Looks like the BOP may have closed except for a small leak..if it did not close oil would becoming out the drillhole? they we have the riser that bent to the sea floor? Let the engineers figure it out!!! Way beyond me...