Metalic or plastic pipe that is assembled and inserted into a recently drilled section of a borehole and typically held in place with cement.
Usually pulled down all the way from surface.
See also Casing @ Wikpedia
Metalic or plastic pipe that is assembled and inserted into a recently drilled section of a borehole and typically held in place with cement.
Usually pulled down all the way from surface.
See also Casing @ Wikpedia