On 6/18/2010 7:14 AM, Maxwell Lol wrote:
Zz writes:

6. To save time/$, they displaced the drilling mud in the riser (above
the BOP up to the drill rig on the surface) with sea water before the
inferior cement had completely set, and without the normal plug in the
casing below the BOP. This would drastically reduce the pressure head
on the formation, and allow formation fluids to enter the borehole.



7. To save time/$ - they did not use an acoustic switch as a backup
system to shut off the valve.

What part of "valve is broken" are you having trouble with? You can put
a billion switches on a light and if the bulb is burnt out none of them
are going to make it turn on.

The problem with the valve is not that it did not get the signal to
close, the problem is that something is preventing it from closing.

This safety mechanism is required by
law in other countries (e.g. Norway, Brazil). It is not a requirement
in the US.

http://online.wsj.com/article/SB1000...417936798.html

Irrelevant. The thing that the switch is supposed to control is broken.
More switches aren't going to make any difference.