Well drilling is the process of creating a hole in the ground to access underground water or other resources. This is typically done using specialized equipment that can penetrate various types of soil and rock. The depth and diameter of the well depend on the specific needs and the geological conditions of the area. Once the hole is drilled, a casing is often installed to prevent the walls from collapsing and to protect the water from contamination. After the well is completed, it can be used for various purposes, such as providing drinking water for homes or irrigation for farms.