A wellbore is a hole drilled into the ground to access natural resources, such as oil or gas. It serves as a pathway for extracting these resources from underground reservoirs. Wellbores can vary in depth and diameter, depending on the geological conditions and the specific resource being targeted. The construction of a wellbore involves several stages, including drilling, casing, and completion. Drilling is the process of creating the hole, while casing involves lining the wellbore with steel pipes to prevent collapse and protect groundwater. Finally, completion refers to the installation of equipment that allows for the safe extraction of resources.