REVERSIBLE IMPACT DEVICE FOR DRIVING WELLS IN GROUND Russian patent published in 2017 - IPC E02F5/18 

FIELD: construction.

SUBSTANCE: reversible impact device when driving wells in the ground contains a housing and a striker with an air distribution pipe having an axial channel, a radial window in the wall and a liner, a cage with two annular grooves freely mounted on the air distribution pipe above the liner. The air distribution pipe has an annular groove in the wall, connected to the axial channel by at least two radial windows, the cage being made diamagnetic and rigidly attached to the housing. The liner consists of at least two magnetic elements installed with the possibility to contact by their side surfaces with the side walls of the annular groove and with each other.

EFFECT: ensuring stable operation in the modes of forward and reverse strokes and simplifying the design with the device operation durability.

2 cl, 3 dwg