That idea that they learned is a joke. here is a quote from a news site comparing the BP blow out to an earlier one.
79 Mexico oil spill
Attempted Fixes
# They attempted to put a cone over the top, calling it operation Sombrero (as oppose to Top-Hat)
# They attempted to plug up the leak by pumping rocks, mud and seawater into it
Pemex pumped cement and salt water into Ixtoc for months before finally bringing the runaway well under control and sealing it with cement plugs.
Pemex's scramble to come up with other solutions while the relief wells were being drilled will sound familiar to those who have followed BP's efforts to stop the oil gushing out of its ruptured well.
Divers tried to manually operate the blowout preventer but this effort was unsuccessful and over the next several months Pemex tried a variety of solutions, including a plan to force metal spheres into the well to cut the flow of oil and lowering a steel structure over the spill to capture the crude.
BP is trying similar schemes but the huge water depth it is operating at is vastly complicating its efforts.
Does any of that sound like BP learned anything from an almost exact issue as theirs?
In both cases natural gas flowed unnoticed into the well being drilled, causing an explosion. In both cases a critical piece of fail-safe equipment -- the blowout preventer -- failed. And in both cases the operators struggled to quickly staunch the flow of oil into the Gulf of Mexico.
Here are some links.
http://www.reuters.com/article/idUSTRE64N57U20100524
http://caps.fool.com/Blogs/an-identical-oil-spill/399603