Method of converting a cable in the ground into a closed guiding track for insertion of new conductors

Abstract

Method of removal of the interior parts of cables in the ground, preferably coaxial (1) and telecommunication (2) cables, for the insertion of new conductors. The insulation material (3,4) may be dissolved or broken down by means of chemical influence of e.g. xylene or copper ethylene diamine for coaxial cable (1) and telecommunication cable (2) respectively, whereby the solution serves as a sliding agent by the withdrawal of the conductor/conductors (5,6). The insulation washers (3) of a coaxial cable (1) may be melted by insertion of a heating element (8) or by means of heat from electrical resistance in the parts (5,7,9) of the cable. The insulation washers (3) in a coaxial cable (1) and the conductors (6) with the insulation material (4) in a telecommunication cable (2) may be milled and removed. By applying electro-magnetic pressurized oscillations the insulation washers (3) of a coaxial cable (1) may be destructed. The insulation material (3) and the conductor (5) of a coaxial cable (1) may be removed by introducing an oscillating pressurized fluid with a simultaneous tension in the center conductor (5).

Dependencies are inferred from the claim text.