As a client, there are two types of casings available, a plastic casing and a steel casing. Well drilling requires that the borehole uses one material and cannot mix the two materials.

Each has its advantages and their drawbacks. Plastic casing, while cheaper, lighter, and rust-proof is also brittle and can break; the casing is usually used for depths less than 100 meters.

On the other hand, steel is quite strong and rigid and can go for deeper depths however just like household piping, can rust over time, this should be noted that it takes a while for this to happen, roughly about 75 years.