If we found a water well, how can we get the life time of a water well. Is it possible, I could not found the answer on internet search.
Since you are asking about a very old well in your comment , how long can a well last? There are water wells still in use today from biblical times. If they are deep enough and have not been contaminated by surface water or things being dumped in them the well will last as long as there is water. You would want to have a sample tested to make sure the water is safe to drink but if the water is good I would use it without question.
Make an appointment with a "water well" guy and have him ascertain the viability of the found well. He can check the pump, wiring, condition of the piping, capacity of the well and make recommendations for up-grading the well if that is what is needed.