ELECTRIC CABLE Russian patent published in 2007 - IPC H01B7/08 

FIELD: cable engineering; cables for feeding submersible oil-extraction pump motors and other submersible units.

SUBSTANCE: proposed electric cable designed for use at depths exceeding 2000 m has cylindrical insulated current-carrying conductors disposed in same plane, sheath, and armor of shaped steel band; its three conductors are tightly fitted through their insulation to one another throughout their entire length and covered with their common sheath to form wedges of sheath material in-between; thickness of common sheath on flat sides ranges between 0.7 and 1.0 mm and on lateral sides, between 1.0 and 1.5 mm. This cable is characterized in that it retains its insulation integrity upon pre-connection splicing and during lifting-and-lowering operations in sloping wells, its intermediate conductor is not crushed at points of contact with two lateral conductors when used at high temperatures.

EFFECT: enhanced service life.

1 cl, 1 dwg