DEVICE FOR FORMATION OF WELLS IN GROUND Russian patent published in 2013 - IPC E21B7/00 E02F5/20 E02D3/46 

FIELD: mining.

SUBSTANCE: device includes a basic machine with an arm, a working element hinged to it and including a percussive compacting mechanism with a stamp and hydraulic cylinders. The working element includes a hollow tubular housing, in which there movably installed along the axis is a hollow cylindrical cover adjacent to the above tubular housing; the above cylindrical cover includes a percussive compacting mechanism movably installed in it along the axis, and is equipped on lower end projecting out of the housing and enclosing it on the outer side with a supporting flange, on a flat end surface of which, which faces the housing, there hinged by means of eye lugs are at least four hydraulic cylinders parallel to the housing axis and in-pair located in its two diametrical planes. The hydraulic cylinders constituting the first pair are arranged outside the tubular housing and hinged to the housing with ends of their stocks pushed inside the cylinders till stop by means of eye lugs on its external side surface. The hydraulic cylinders constituting the second pair are arranged on outer side of the cylindrical cover, but in internal plane of the housing in through slots that are parallel to its axis and made on its inner side surface, and with ends of their stocks extended to the outside till stop, they are hinged by means of eye lugs to the upper part of the compacting mechanism adjacent to the inner side surface of the cylindrical cover and installed in it so that length of the lower part of its stamp, which projects out of the cover, is basically equal to working travel of the above hydraulic cylinders and at the same time is half the full length of the stamp submerged in the ground.

EFFECT: improvement of production capacity of the device operation, its efficiency and reliability; reduction of its overall dimensions; improvement of working conditions and safety regulations.

2 cl, 7 dwg