Withdrawn from 01.07.2014
1.1 The general term "Drill Rig" covers several differing types of machines for use in the construction industry, water well drilling industry, mining and quarrying, for use above ground as well as underground and for tunnel construction. The differing tasks determine the choice of drilling method and type of machine. For this reason there are many possible ways to separate drill rigs into different groups, e.g. in accordance with: - The task; - The drilling method used; - The cutting removal method; - The type of construction work. The methods used for drilling can be basically differentiated in percussive and rotary drilling principles.