Borehole drilling is a process used to create deep holes in the ground to access underground resources, such as water, oil, or minerals. This technique involves using specialized drilling equipment to penetrate various soil and rock layers, allowing for the extraction of these resources. Boreholes can vary in depth and diameter, depending on the specific needs of the project. Once a borehole is drilled, it can be equipped with a casing to prevent collapse and contamination. The water or other resources extracted can be tested for quality and quantity. Borehole drilling is essential in fields like geology, hydrology, and mining.