Borewell cost near chennai

I am planning for a borewell (350 feet) in my farmland near chennai.  Any idea on how much it will cost.

The cost of digging charges will be in between 70/- to 80/- per ft depending upon the locality. There will be much diffarance in casing depth and the price will be between Rs 200/- to 400/- per ft. In some areas it is only 10 to 20 ft and in some areas it may even 350 ft total depending upon the soil structure.Pl enquire side by side farmers and it can be gathered from them, which is realistic value. g.p.rao, farmer

Thanks gp rao.  I will check with nearby farmers also.