The abyssal wells of any type (deeper than 10 meters) are bored with rotational driller with flushing, i.e. using delivered water and polymeric solution for the boring process. The water and the solution together with the force brought by the driller destroy the ground and form a boring hole.
The water wells are bored up to the end of a watery layer. The watery layer is determined by the composition of the soil extracted form underneath as well as by the resistance power created by the soil.
After the watery soil is detected and the boring hole is formed completely, the safety casing is inserted that consists of nutritive plastic tubes, and lattice or gap filters which the well is fed by water through. Later, the well filter and all the entire safety casing are covered by flushed gravel of 0,4 mm fraction; special material secures a clay span against the surface water, and well contamination. The last phase before the installation of the water lifting equipment is flushing of the well by the abyssal pump or compressor, and in some cases using both.
The wells for the geothermal heating systems are made the same way as the water wells. A closed circulation piping (collector) filled with nonfreezing liquid that extracts the heating energy and transfers it to the heating pump is laid into the well of the geothermal heating. The pump transforms the heating and distributes. After the collector is put in, the boring hole is covered by gravel and protected from external contamination.