HYDRO-RIFTING DEVICE Russian patent published in 2017 - IPC E21C37/10 

FIELD: mining.

SUBSTANCE: hydro-rifting device comprises a housing which is separable along its longitudinal axis with annular cavities at its ends, a mechanism for returning them to the inoperative position located inside the detachable body, an elastic chamber, and expanding inserts disposed between the parts of the detachable housing on the side of the plane of the connector and interacting with them and elastic chamber, end sealing clips with cylindrical flanges with a working agent connection into the elastic chamber and the displacement connection of air from this chamber, the working agent volume limiting located between the fittings, which has contact with the inner wall of the elastic chamber. One end of the working agent volume limiter is connected to the supply connection of the working agent and the opposite end of the limiter housing is freely located in the channel of the air outlet. The device is equipped with a wedging unit with a drive for its longitudinal movement fixed to one of the split housing parts. Bevels having contact with the reciprocating bevels on the wedging unit inner surface are made on the outer surface of one of the body parts. The split housing parts are offset relative to the expanding inserts symmetry plane, and the outer surface of the unit has a shape that allows the unit to enter the wellbore. The drive of the wedging unit longitudinal movement is made in the form of a mechanical nut-screw transmission, the nut is made in the unit end surface and the end part of the screw is provided with an annular cannelure, and at the end of one of the sealing rings, the gripper is rigidly fixed, on which the guide groove is coaxially aligned with the screw, the groove is designed to compensate the transverse displacement of the screw end part relative to the gripper.

EFFECT: device allows to increase the service life of the camera several times due to increasing the working stroke of the punch.

4 cl, 5 dwg