Quote:
Originally Posted by fotze
Was that the stuff from the roustabout? Thats the janitor. That could be true, but there is more to it than that.
There are certain times when things are more risky than others, like when pulling drill pipe, sounding like that is when it happened, you can 'suction' the well up like pulling a plunger when pulling out, but you hopefully have heavy enough fluid in the well to be greater than the bottomhole pressure. There would have had to have been a series of mistakes/failures.
i.e. bottomhole pressure greater than the fluid column, meaning they fataed up. Some sort of thief zone that took the fluid and then it starts to kick. But then they would have had to fata up the bops, the annular first, some sort of stabbing valve for the drill string and ultimately the shear ram would have had to also fail. Maybe they waited to long for the shear ram, maybe the casing was undersized and it blew after the bops were set, which would be a major unforgiveable fata up.
There are many, many things that could have went wrong, the roustabout would likely not have a clue.
I would bet that BP already has a really good idea what happened.
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The one report I saw said they had a bunch of rubber bits come back up, which they suspected might have been damage to the annular.
This would make all of their pressure tests junk data and would render all of their mud weight calculations useless, leading to not having enough mud weight when pulling the pipe.