Borehole construction Casing

Borehole construction Casing

The casing serves as a housing for the pumping equipment, holds the borehole walls from colapsing and as a vertical conduit for water flowing upward from the aquifer to the pump intake. Selection of casing material is based on water quality, well depth, cost, borehole diameter, and the drilling procedure. Steel is used most commonly, but thermoplastic materials can be used especially in areas where groundwater is highly corrosive and the depth of the well is less than 200 meters.