Our firm has only one in the north-west of modern plant for drilling, to the best of Finnish firms. Installation of Atlas Copco (Sweden) based on the a / m Mercedes, as a rule, allows to drill a well for water depths up to 100m in one day, if deeper, then for two days.
The method of drilling - with simultaneous immersion hammer casing for loose rocks. Impassable rocks as loose and rocky, are ground into dust and blown to the surface of the compressor installation.
ROP when drilling with casing is 2 ÷ 6 meters / hour, depending on the nature of the soil during drilling without casing, open hole in the rock is 15 ÷ 25 meters / hour, depending on the hardness of the rocks.