| 摘要 |
FIELD: mining.SUBSTANCE: group of inventions relates to downhole electromagnet telemetering systems and methods of insulating coatings application on telemetry antennae electromagnetic units elements. Electromagnetic telemetric systems core comprises elongated housing, having first and second ends, electrical insulation applied on, at least section of elongated housing and including binder coating applied on elongated housing outer cylindrical surface, and electrical insulation layer applied above binding coating, and first sealant layer applied on electric insulation layer. Binder coating includes material, which is selected from group consisting of nickel-chromium alloy, molybdenum, aluminium bronze and zinc-based alloys. Method of applying insulating coating on core consists in application of electrical insulation on core outer cylindrical surface.EFFECT: higher reliability of coating in unfavorable conditions of drilling.20 cl, 3 dwg |
