ELECTRIC CABLE Russian patent published in 2007 - IPC H01B7/02 

FIELD: cable engineering; feeding submersible power systems of oil-extracting pump motors.

SUBSTANCE: proposed cable designed for use at depth of up to 3000 m, stratal liquid temperature of 140 to 210 °C, gas factor over 300 m³/t, and pressure of up to 30 MPa^{has current-carrying conductors insulated by radiation-modified polyethylene, sheath, pad, and armor, as well as additional sheath made of thermoelastic plastic layer, 0.2 to 0.7 mm thick, that covers insulation of each current-carrying conductor, surface layer of double-layer insulation being plasma pre-treated.}

EFFECT: enhanced service life of cable.

1 cl, 1 dwg