drilling & geotechnical
Erri Hendriawan
erri@geonusa.com
HP: +62 812 960 8187
Deep water wells are drilled using rotary drilling machine up to aquifer saturated with groundwater at specified quality. Water or bentonite mud is used as a circulation fluid to displace cutting from borehole and to cool and lubricate the drill bit. The well is cased with PVC or galvanized steel pipe and screen is installed in the aquifer zone. The annular space between the well screen, well casing and borehole wall is filled with gravel or coarse sand to prevent sand and fine sand particles moving from the aquifer formation into the well. The uppermost section of the annulus is sealed with a bentonite clay and cement grout to ensure that no water or contamination can enter the annulus from the surface. Our services include water quality testing, filter installation and pump & piping installation.