Metalic or plastic pipe that is assembled and inserted into a recently drilled section of a borehole and typically held in place with cement.
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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