This sounds illinformed to
This sounds illinformed to people in the drilling industry. It almost sounds like some sort of marketing ploy by SLB. Firstly, a CBL (cement bonding log) would not have been run on this type of job - the CBL needs to run through / past the cementation (on the casing exterior) - not able to do so when an internal cement plug has been set (solid throughbore). Secondly, Schlumberger wireline crews have no knowledge of wellcontrol - it is not an operation on their radar. Thus, they have no IWCF well control exams/certification and is thus unlikely that they would be giving instructions out on a topic that they are complete laymen. Thirdly, the means of killing the well is wrong - you would shut in the well first, then kill it in a controlled manner with kill weight fluid (not 'dumping'). Unfortunately this whole issue has snowballed drastically because the people to deal with this issue have been pushed out of the way by office people, scientists & others who have no knowledge of the equipment and op's - this goes for the scaremongerers & the idiotic engineers at BP.
Harris told Upstream BP
Harris told Upstream BP released the Schlumberger crew on the morning of 20 April. They left the rig, in Mississippi Canyon Block 252, on board a regularly scheduled helicopter transfer at 11am, local time, that day.
http://www.upstreamonline.com/live/article215308.ece