UA67161A - Hydro-hammer drill line - Google Patents

Abstract

The hydro-hammer drill line has a rotatable drill pipe, this comprises the outer and the inner barrels with a shoe and core catcher, and hydro-hammer with inlet channel for connecting to pressure source and the channel for fluid discharge, this is connected to the gap between the barrels connected to the well. Over the hydro-hammer there is placed the distribution fitting where there is provided a chamber with openings connected to the pressure source, inlet channel of the hydro-hammer and with the gap between the barrels to which with possibility of displacement in long direction there is installed a piston with axial channel and saddle for the start valve. At that, the opening of the chamber connected to the inlet channel of the hydro-hammer is made with possibility of covering by the side surface of the piston. In the hydraulic line between the chamber and the gap between the barrels there is installed a blocking valve arranged with possibility of simultaneous separation of the chamber and the gap between the barrels and of connection to the space over the circular slider, cavity under this one is connected to the gap between the barrels. The cavity of the inner barrel is arranged with possibility of connection to the hydraulic line between the chamber and the gap between the barrels over the blocking slider, by means of openings and circular slider. The piston arranged withpossibility of connecting the opening of the chamber connected to the inlet channel of the hydro-hammer to the pressure source and of disconnecting the last one and the opening of the chamber connected to the gap between the barrels.