Electrode supporting conduit tube for electrical heating or unde

Details Electrode supporting conduit tube for electrical heating or unde Electrode supporting conduit tube for electrical heating or unde

1987-01-14

1988-12-27

Kittle, John E.

Stock material or miscellaneous articles

Composite

Of metal

428 345, 138145, B32B 1508, F16L 914

Patent

active

047940492

ABSTRACT:
An electrode supporting conduit tube for electrical heating of underground hydrocarbon resources comprises a metal conduit tube; and an insulative covering adhered on and around the outer peripheral surface of the metal conduit tube, the insulative covering being a laminated body of polyether/ether/ketone resin and glass fiber, which is obtained by confining both polyether/ether/ketone resin and glass fiber wound on and around the metal conduit tube within a metal mold and subjecting the laminated materials to shaping under heat and pressure at a heating temperature of from 350.degree. C. to 450.degree. C. and a pressure of from 10 to 200 kg/cm.sup.2.

REFERENCES:
patent: 3946809 (1976-03-01), Hagedorn
patent: 4192697 (1980-03-01), Becker et al.
patent: 4320224 (1982-03-01), Rose et al.
patent: 4360630 (1982-11-01), Smith
patent: 4394417 (1983-07-01), Hilker
patent: 4421588 (1983-12-01), Davies
patent: 4577664 (1986-03-01), Takahashi et al.
Modern Plastics Encyclopedia, 1983-1984, pp. 54 and 489.

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