ELECTRIC CABLE FOR FEEDING SUBMERSIBLE OIL-EXTRACTION PUMP MOTORS Russian patent published in 2007 - IPC H01B7/08 

FIELD: oil well subsurface equipment; feeding submersible oil pump motors.

SUBSTANCE: novelty is that proposed electric cable designed for operation in oil wells in direct contact with well liquid to feed electric motors of submersible oil-extraction pumps has parallel conductors covered with polymeric insulating material and additional crosswise corrugated oil-tight nonmagnetic metal sheath overall; corrugations have bulges directed away from conductor and disposed throughout cable length at intervals smaller than corrugation longitudinal size; corrugations of one sheath are disposed opposite those of adjacent conductor sheath.

EFFECT: enhanced service life of cable operating in direct contact with oil well liquid.

1 cl, 2 dwg