Corrosion resistant metal pipe with electrode for oil wells

Details Corrosion resistant metal pipe with electrode for oil wells Corrosion resistant metal pipe with electrode for oil wells

1985-03-19

1987-05-12

Jordan, M.

Electric heating

Heating devices

Resistive element: igniter type

166 60, H05B 303, E21B 4324

Patent

active

046653058

ABSTRACT:
A corrosion-resistant metal pipe, and a process for producing the same, such as may be used in an electrode unit for electrically heating underground hydrocarbon resources or for conveying corrosive materials. The pipe may be produced in any desired length. In one embodiment, the corrosion-resistant pipe includes a base pipe element composed of at least two corrosion-resistant pipes joined by welding. The two pipes are stripped at adjacent ends of a first coat made of a glass-mica molded body formed on both inner and outer surfaces of the pipe. A plurality of communication holes are formed in the joint provided by welding the pipes. A second coat formed of a glass-mica molded body is then provided on both inner and outer surfaces of the joint with the second coat continuous with the first coat.

REFERENCES:
patent: Re15727 (1923-12-01), Crossley
patent: 1878178 (1932-09-01), Power
patent: 4412010 (1983-10-01), Ishii et al.
patent: 4412124 (1983-10-01), Kobayashi
patent: 4433724 (1984-02-01), Nagano et al.
patent: 4436955 (1984-03-01), Kyle
patent: 4567945 (1986-02-01), Segalman

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