E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
26/155, 166/38
E21B 43/24 (2006.01) E21B 17/00 (2006.01) E21B 36/04 (2006.01)
Patent
CA 1239089
ABSTRACT OF THE DISCLOSURE 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.
476904
Inoue Takeo
Shirazawa Takashi
Mitsubishi Denki Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
LandOfFree
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