METHOD OF PERCUSSION DRILLING Russian patent published in 2018 - IPC E21B1/00 E21B7/04 E21B7/28 E02F5/16 

FIELD: mining.

SUBSTANCE: invention relates to the field of mining equipment, to methods of drilling wells for rocks of medium and high fortress in mining and can be used in construction. Method of percussion drilling consists in the fact that the rock cutting tool with a convex downhole part is pressed to the bottom of the well, have a shock effect on it and carries out a reciprocating rotational movement in the longitudinal plane, and removes drilling fines from the well. Reciprocating movement of the rock-cutting tool is carried out by alternate impact on its side parts, at least two impact devices to slaughter.

EFFECT: provides the possibility of combining the impact of both the destruction of the rock, and to move the rock-cutting tool, limited only by the pressure of the drill; metal consumption decreases, the set of equipment becomes more mobile, which makes it possible to use it in hard-to-reach places.

4 cl, 3 dwg