Water is essential for life and for many human activities, which is why today it is the most important resource. One of the methods to obtain water is by drilling water wells. In the drilling of a deep well, it is possible to go through several aquifers and different types of strata, so the experience of the technicians will be essential to address different situations. Different techniques can be used in drilling a water well. The well drilling system used will depend on the characteristics of the soils (particle size: gravel, sand, clay, silt, soils with a lot of organic matter), its plasticity and location of water tables. A fundamental aspect of a water well is depth. In a well drilling we can reach several aquifers (from more superficial to deeper). The deeper aquifers will have more stability in the water supply and less possibility of contamination.