Conduit tube of an electrode device for electrically heating und

Details Conduit tube of an electrode device for electrically heating und Conduit tube of an electrode device for electrically heating und

1984-04-17

1986-03-25

Bryant, III, James E.

Pipes and tubular conduits

Distinct layers

With intermediate insulation layer

138143, 138145, 138146, 138DIG6, 138DIG7, 138177, 174 47, 174110SR, 264280, F16L 914, B65H 8100

Patent

active

045776644

ABSTRACT:
A conduit tube of an electrode device for electrically heating underground hydrocarbon resources, which comprises: a metal conduit tube and an electrically insulative covering adhered on and around the outer peripheral surface of said metal conduit tube, said electrically insulative covering being formed by adhering polyether/ether/ketone resin in powder form having particle size of a range of from 10 to 100 .mu.m on and around said metal conduit tube which has been preheated to a temperature range of from 350.degree. C. to 450.degree. C. by the electrostatic coating method, and fusion-bonding the electrically insulative covering material thereon at said temperature range of the preheating.

REFERENCES:
patent: 3931836 (1976-01-01), Thiele
patent: 4213486 (1980-07-01), Samour et al.
patent: 4331798 (1982-05-01), Staniland
patent: 4435350 (1984-03-01), Fukushima et al.
patent: 4481239 (1984-11-01), Eckner
patent: 4500577 (1985-02-01), Satake et al.

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