Changes

[[Image:drilling icon.png|right]]

[[Image:Point and well screen.jpg|thumb|right|250px| Point and well screen]]

The driven well can only achieve a penetration of only 1-2 meters into the water table because of the compacting resistance of the sand. The depth can be increased to about 10 meters using an engine driven power tool. However, the type of formation (of the aquifer, permeable or not permeable) can not be determined at this depth because no soil samples can be taken. This may affect the well yield. It is not possible to install a gravel pack around the well screen.

[[Image:Self made point and well screen.jpg|thumb|right|250px| Self made point and well screen]]