i know the difficulties of doing this aswell, ive drilled 2 of my own wells (only about 25ft) but still know how almost everything that can go wrong does and you cant plan for that. I was sticking in a new suction line into my first well, and a rock, sised the exact diameter of the pipe, got wedged in the casing (as its only about 1 inch wide) and stopped me from being able to lower the suction line down, this took me over a day to get out with a borescope camera right at the pipe joint, and several old bent coat hangers to form a hook