This is a method somewhat similar to the Baptist
Method. A hand pump
is used to force water down the pipe while the cuttings come up in the annular
space around the pipe. This series of two videos also shows the
installation of a hand pump. Particularly interesting in the second
video is the demonstration of how the pump valves work. This video is
posted by Akvofoundation on YouTube.
EMAS WELL DRILLING PART 1
A derrick is constructed and a pulley is mounted. A mud pit is
dug with a trench connecting the hole and the pit. A hand pump is
used to pump water from the mud pit into the drill pipe. The drill
pipe consists of a metal pipe with a fabricated drillbit on the end.
The drillbit is constructed so water can flow out of the bottom of the
pipe. Bentonite is added to the drilling water to prevent
the collapse of the hole during drilling.
Drilling is accomplished by a team of men. One pushes the pipe
down and turns the pipe. A second man pulls the pipe back up using
the pully. A third man pumps drilling fluid from the mud pit into
a hose running into the drill pipe.
As drilling progresses additional pieces of pipe are added to the
drill pipe. A lever is substituted for the pulley when the hole
gets deep enough the pipe becomes harder to lift. The drilling
fluid is changed as well. When water bearing sand is
encountered the drilling is stopped and the drill pipe removed.
A well screen is cut with a hacksaw. A
sock is slipped over the screen and secured to keep out fine sand
particles. The well screen and well casing are installed in the
well. The well is developed by pumping water into the well.
The annular space around the well casing is sealed with bentonite.
A valve is attached to a temporary pipe and
this apparatus is used to develop the well or pump it until the water
runs clear.
A hand operated pump is installed. The
pump uses a two ball valve. The operation of the double ball valve
pump is demonstrated with a cutaway demonstration model. A
base is constructed for the pump. Local villagers are show easily
operating the pump
EMAS WELL DRILLING PART 2
Here is the hard way to do it. Not
recommended but interesting to watch. Note the layers this guy digs
through.
