Drilling techniques are methods used to create holes in various materials, such as soil, rock, or metal. Common techniques include rotary drilling, where a rotating drill bit cuts through the material, and percussive drilling, which uses repeated blows to break up hard surfaces. These methods are essential in industries like construction, mining, and oil extraction. Another important technique is core drilling, which involves removing a cylindrical core of material for analysis. This is often used in geological surveys to study subsurface conditions. Each technique is chosen based on the specific requirements of the project and the type of material being drilled.