show an interesting technique in which a series of progressively smaller casings
are used to overcome the friction that would result from a long hole in the
sand. First, a four inch casing is worked into the sand. Then a
three inch casing is extended beyond the depth of the four inch casing.
Then, an even longer 2 1/2 inch casing is inserted inside the three inch casing.
Each of the casings are worked into the soil/sand by bailing sand from the
bottom of the hole with a 1 1/4 inch bailer that will fit inside any of the
three casings. Finally, when sufficient depth is reached a well
screen is inserted and all three of the progressively sized casings are removed.
This is an excellent example of
using good old ingenuity to overcome a lack modern equipment.