What if they hit water?
They don’t seem to like to hit water although they did on our wells at about 100 feet down. The well then filled up with water while they were drilling. This made things more of a mess but didn’t seem to slow the drilling any. On the second day of drilling, they brought a special truck to capture the water and mess. The well was sealed and capped so there isn’t a fountain in the yard. They also took care to prevent any groundwater contamination.