Part of temporary well dewatering involves installing the well casing or pipe into the ground to the depth required and below.

Homesteaders with a shallow water table and sandy soil can save thousands of dollars by installing a sand-point driven well themselves for a secondary or primary water source.

BP chose to use an oil well casing that the company knew was not as safe as a second approach but was considered the better "economic" option, according to a BP document given to The New York ...

The cement and steel casings of old shale gas wells will inevitably deteriorate and fail over time, resulting in the upward migration of fracking fluids to ground water zones ...

The problems involved the well casing and the blowout preventer, which are considered critical pieces in the chain of events that led to the disaster on the rig.