EMAS manual well drilling is a method for drilling small-diameter tube wells by hand. This movie shows the materials needed for the EMAS technique. The main movie showing the process is available .
The drilling method is a hybrid between washboring, percussion and rotary drilling. It permits to drill through all kinds of loose soils, as well as consolidated materials and light rock. It will not, however, penetrate hard original rock or boulders (e.g. ancient river beds underground). The usual diameter of the tube well is 37 mm.
Movie made by Wolfgang Buchner, EMAS. More information on http://www.akvo.org/wiki/index.php/EMAS_well_drilling and http://www.emas-international.de/english/index_e.htm