The failure rate, per se, is not extremely high, but the effects of a failure is greater than in many applications. Three were able to redrill and produce, one was not recoverable as to the strata. I have also seen a 12 well field that had only 2 failures. This range appears to be about the norm from others I know in the field. The type of platform makes a difference in how many systems are reachable.
Refineries are a mess.
The majority of the ones we have, have been jacked around and jury-rigged to comply with various EPA, etc. Note that these figures relate strangely well with the DOD continency guidelines. The way this question is worded leaves me at a loss. The concept that there exists some sort of association or way in which energy companies actually share information, technology, etc. As you know, systems do not operate by themselves.