Apparatus for manufacturing an insulated conductor in metal tubing

An apparatus for making an insulated electrical conductor in a metal tubing comprising;

• a generally longitudinally extending pipe generally vertically extending and having an inside and an upper and lower end,
• a length of metal tubing longitudinally extending in the inside of the pipe, said tubing having an outside of a size less than the size of the inside of the pipe, and having open upper and lower ends,
• an extension tube vertically positioned above the metal tubing, said extension tube having an internal diameter greater than the internal diameter of the tubing, and having upper and lower ends,
• a crossover connected to and positioned between the lower end of the extension tube and the upper end of the metal tubing, said crossover having an upper end having the same internal diameter as the extension tube and a lower end having the same internal diameter as the tubing and having a passageway therethrough tapering in size between the upper and lower ends of the crossover,
• a length of electrically conductive wire having an insulated cover thereon, said cover having an outside less than the size of the inside of the tubing,
• at least one piston pig connected to the wire for assisting in moving the pig downwardly through the inside of the extension tube, the crossover and through the inside of the tubing by gravity and by a differential fluid pressure, and
• fluid pressure means for applying fluid pressure to the pig.