On May 31st, the Washington Post noted:
Sources at two companies involved with the well said that BP also discovered new damage inside the well below the seafloor and that, as a result, some of the drilling mud that was successfully forced into the well was going off to the side into rock formations.
"We discovered things that were broken in the sub-surface," said a BP official who spoke on the condition of anonymity. He said that mud was making it "out to the side, into the formation."
On June 2nd, Bloomberg pointed out:
Plugging the well is another challenge even after BP successfully intersects it, Robert Bea, a University of California Berkeley engineering professor, said. BP has said it believes the well bore to be damaged, which could hamper efforts to fill it with mud and set a concrete plug, Bea said.
Bea is an expert in offshore drilling and a high-level governmental adviser concerning disasters.
On the same day, the Wall Street Journal noted that there might be a leak in BP's well casing 1,000 feet beneath the sea floor:
BP PLC has concluded that its "top-kill" attempt last week to seal its broken well in the Gulf of Mexico may have failed due to a malfunctioning disk inside the well about 1,000 feet below the ocean floor.
***
The broken disk may have prevented the heavy drilling mud injected into the well last week from getting far enough down the well to overcome the pressure from the escaping oil and gas, people familiar with BP's findings said. They said much of the drilling mud may also have escaped from the well into the rock formation outside the wellbore.
Yesterday, Senator Bill Nelson told MSNBC that he's investigating reports of oil seeping up from additional leak points on the seafloor:
Senator Bill Nelson (D-FL): Andrea we’re looking into something new right now, that there’s reports of oil that’s seeping up from the seabed… which would indicate, if that’s true, that the well casing itself is actually pierced… underneath the seabed. So, you know, the problems could be just enormous with what we’re facing.
Andrea Mitchell, MSNBC: Now let me understand better what you’re saying. If that is true that it is coming up form that seabed, even the relief well won’t be the final solution to cap this thing. That means that we’ve got oil gushing up at disparate places along the ocean floor.
Sen. Nelson: That is possible, unless you get the plug down low enough, below where the pipe would be breached.
Indeed, loss of integrity in the well itself may explain why BP is drilling its relief wells more than ten thousand feet beneath the leaking pipes on the seafloor (and see this).
And Rob Cavnar, an oil industry expert, called directly on BP to be transparent about the explosions that caused top-kill to fail and address the reports of the massive subsurface leaks on the internet that have been by the underground blowout:
