| 摘要 |
FIELD: electrical engineering; cables for feeding underground equipment of oil wells such as submersible oil pump motors and other pieces of equipment. ^ SUBSTANCE: novelty is that proposed electric cable has at least two parallel polymeric material insulated current-carrying conductors, each conductor being also covered with metal band sheath coated on two sides with crosswise corrugated polymeric material longitudinally placed on insulation with its edges overlapping; conductors covered with mentioned sheath have common external armor of spirally arranged metal bands. Mentioned sheath provided with longitudinally disposed corrugated metal band having integral polymeric weld provides for desired tightness of insulation and for its reliable protection. Compared with prior art, proposed cable is characterized in its suitability for use in oil wells in direct contact with well liquids. ^ EFFECT: enhanced resistance to environmental impacts, enlarged service life of cable. ^ 1 cl, 4 dwg |
