One of the threads at the Oil Drum touched on some of the intricacies involved with intersecting the target well ...the first Relief well is within 200 feet laterally...still need to drill several thousand feet at an angle to get where they need to be.
Then they start doing the mud action followed by the cement action...since they seem to be uncertain just what they might find.,...I would doubt anyone is going to give dates when it is stopped.
biff has some interesting insights into the process ... seems it’s not an exact science - more like an in-flux art...