Sorry.. was doing more reading. It appears the well seal itself is what is fully exposed, and there isn't any cap covering it. So the well seal nuts are rusted to the bolts.
Considering there is a pipe coming out the top, with a cap on it, is it possible this is actually connected to the pipe coming off the top of the pitless adapter? I wouldn't think so otherwise how else would you pull the seal off?
Thanks for any help.