Abstract: The apparatus for removing the production pipe (10) in the borehole is mechanically connected by means of BHA to an electrical power supply (12), coolant supply (13), data cable (14) and control unit (15). The equipment (X) is placed in a contactless manner inside the production pipe (10) and comprises a liquid precursor supply (11) which enters the generator (5) of the plasma-forming medium connected to the nozzle system inlet (6) connected to the nozzle system (7).

Abstract: A generating electric arc is disclosed herein, which thermally and mechanically acts on a material in such a manner that the electrical arc is shaped and guided by the action of a magnetic field and hydro-mechanical forces on the electrical arc. Generally, a substantial part of the electric arc acts directly and areally on a conductive and/or non-conductive material to be disrupted, a substantial part of the electric arc's heat flow is directed into the material to be disrupted, both electric arc roots move on the electrodes of a generator, and the electric arc has preferably a shape of a spiral. A device is also provided herein for generating an electric arc with thermal and mechanic action on a material containing axially symmetrical electrodes, i.e. an anode (4) and a cathode (6), a spark gap (7), nozzles (5) for the working medium flow, cooling media inlet and outlet (12), electric power supply (14), and ring-shaped magnets (9) whose section has the shape of a triangle.

Abstract: A formation of a borehole casing by application of material layers is achieved by means of kinetic sputtering. Specifically, the formation is achieved by additive kinetic sputtering of metallic, non-metallic and composite materials using acceleration and heating of material powder particles and subsequent plastic deformation of deformable powder fraction upon the impact onto the surface. The accelerated and heated particles of material in the form of powder impinge onto the surface of a borehole wall and/or on a mould and/or onto the surface of a previous layer of the casing in such manner that they form the layered composite casing on the inside wall of the borehole and/or on the mould, particularly in a liquid medium.

Abstract: Generating electric arc, which thermally and mechanically acts on material in such manner that the electrical arc is shaped and guided by the action of magnetic field and hydro-mechanical forces on the electrical arc, wherein: —the substantial part of the electric arc acts directly and areally on conductive and/or non-conductive material to be disrupted, —the substantial part of the electric arc's heat flow is directed into the material to be disrupted, —wherein both electric arc roots move on the electrodes of the generator and the electric arc has preferably a shape of a spiral. A device for generating an electric arc with thermal and mechanic action on material containing axially symmetrical electrodes, i.e.