Can anyone help me on a geothermal open loop?

Looking to install a well and attached the geothermal unit to it. Then use the water to pre-heat my domestic water, with the excess for irrigation followed by the remaining unused water back to the well- I read about doing it this way but haven't found anyone is real life who have actually set there system up this way. Any ideas? Sites I can visit? Or personal experience would be very helpful. Thanks.