I just moved to "the country" and have a well. I want to pour a
concrete slab around the well, but worry about eventually having to
replace the pump. People tell me that the metal pipe has to be pulled
out to replace the pump and that I should avoid pouring up to the
casing and leave an access opening in any roof over the well to allow
the pipe to be pulled out. Is this true? How much clearance around
the well pipe should I leave? How much access in the roof is needed?

Thanks,

John