Well casing refers to the large diameter pipe that is inserted into the drill section of the bore well. The casing is held in place by cement or other materials between the casings and the wellbore. Well casing is considered a significant part of the well completion process. This supports the walls of the well and strengthens them. The device also prevents unwanted fluids and gases from entering the well, including surface water, groundwater, and others. Additionally, it protects the equipment such as pumps and rising main from damage.