What is the rise insertion tool that was producing over 22,000 barrels per day before the top kill started?
That exceeds the 12,000 to 19,0000 barrels per day estimates per experts.
The riser is the pipe from the well head to the rig. They were able to get a tool into the broken off riser pipe and divert oil to the rig and into a tanker. So it looks like they are getting about half the oil picked up this way.