PNEUMO-STRIKER Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: device has cylinder, connected on one side to sub, having a wall with central aperture, on the other side - to head, having a chisel, piston with central channel, with thickened middle portion, striking portion and a tail piece. Striking portion enters axial channel and by a spring is pressed to chisel tail piece, tail piece enters central aperture of sub. On the end inside the tail piece a bushing is fixed with longitudinal closed slits, connected to radial apertures. In an axial channel of piston a spring-loaded tubular valve is placed with solid wall and side ports on both sides of wall and with ring-shaped clamp. In central channel of piston recesses are made on three levels. Closest one to sub and farther recesses by F-shaped channels are connected to each other and to hollow of cylinder, directed to head. Middle recess by L-shaped channels is connected to hollow of cylinder, directed to sub. During operation of striker valve ports are combined with recesses and provide for feeding of working agent in cylinder hollow for performing idle runs or working runs with output of all processed agent into well face without additional losses.

EFFECT: higher efficiency.

1 dwg