F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/49
F16L 11/12 (2006.01) E21B 17/00 (2006.01) F16L 25/01 (2006.01)
Patent
CA 1224164
ABSTRACT: : An electrode supporting conduit tube for electrical heating of undergound hydrocarbon resources comprises a metal conduit tube and an insulating member adhered on and around the outer peripheral surface of the metal conduit tube. The insulating member is a laminated body of a web of glass fiber impregnated with water-dispersion varnish of a hot-water resistant and thermoplastic resin and a polyether/ether/ketone resin film, which is formed by first alternately winding the glass fiber web and the resin film on and around the outer peripheral surface of the metal conduit tube for a plurality of winding turns, and then subjecting both polyether/ether/ketone resin film and glass fiber web thus wound on and around the metal conduit tube to shaping under heat and pressure at a heating temperature of from 350°C to 450°C and under a pressure of from 10 kg/cm2 to 200 kg/cm2.
454157
Hayashi Osamu
Matsuda Sadamu
Okahashi Kazuo
Okamoto Goro
Takahashi Ichiro
Marks & Clerk
Mitsubishi Denki Kabushiki Kaisha
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