I'm trying to track down more information about this through contacts inside these companies. Hopefully someone will tell me something.
I am very curious if the reason for the ban (if it existed) was because someone viewed knives as weapons or if they were included in an all-over "no foreign metals whatsoever on the rig" policy due to explosion hazard.
The "explosive hazard"/spark causing angle was my first thought/question.
I actually doubt that, considering a) there always seems to be some sort of welding going on somewhere on the rig and b) a huge inventory of tools are needed to keep the rig running and I doubt any company would pay the cost of having them all non-sparking.
No luck yet in getting any info from my friends at BP and TransOcean. Seems they don't want to talk about it...
-Blast