PERFORATOR Russian patent published in 2018 - IPC E21B6/00 

FIELD: construction.

SUBSTANCE: invention relates to mining and construction industries and can be used to drill holes and wells in any multi-structure rocks with solid inclusions, for example apatite-nepheline ore. Perforator includes a housing with a rotating mechanism housed therein and a double hammer including a main and auxiliary pins, an air distributing system, an end bumper, a drill bit connected to the rod, a shank mounted at one end on the slide bearings in the housing, and the output end connected by a drill stem assembly with a drill bit. Rotary mechanism is made with a rotation drive including a hydraulic motor and a reducer. Auxiliary barrel is installed in the opening of the end box, with the possibility of moving along its longitudinal axis in it, and the end box is made with a permanent magnet installed in it. End box and auxiliary boa are made of ferromagnets, and the shank and the main striker are made of nonferromagnetic materials.

EFFECT: provides a reliable process of "bounce" auxiliary pincers between the main striker and the bar, as well as preventing the "sticking" auxiliary pincers between the main striker and the shank.

1 cl, 3 dwg