Conduct pipe covered with electrically insulating material
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKazuo Okahashi, Ichiro Takahashi
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Abstract
A conduct pipe covered with an electrical insulating material, which is obtained by a process comprising winding a polyether ether ketone resin film around the outside of a metal conduct pipe, carrying out impregnation treatment in vacuum under pressure with using an impregnant resin comprising an ether bonding epoxy resin, and thereafter hardening by heating, is disclosed. The conduct pipe is particularly useful in an electrode apparatus for collecting underground hydrocarbon resources by an electrically heating method.
Claims5
A hot water resistant conduct pipe produced by the process comprising:
- (1) winding a polyether ether ketone resin film around the outside of a metal conduct pipe,
- (2) carrying out impregnation treatment in a vacuum and then under pressure using an impregnant resin obtained by blending a mixture of:
- (a) an epoxy resin,
- (b) a reactive diluting agent, and
- (c) a catalyst capable of forming a three-dimensional network structure by forming ether bonds between the molecules of the epoxy resin, wherein said epoxy resin is selected from the group consisting of bisphenol epoxy resin, alicyclic epoxy resin, glycidyl ester epoxy resin, novalak epoxy resin and cresol novalak epoxy resin and wherein said catalyst is selected from the group consisting of a metal salt of dialkyldithiocarbamic acid, a metal salt of carboxylic acid, imidazole compounds, triethanolamine titanatetriphenyl borate complex, boron trifluoride-amine complex, trimethoxy-boroxine and boric acid anhydride, and thereafter
- (3) hardening by heating,
- wherein said conduct pipe has an electrode on an end thereof, wherein said conduct pipe is useful in an electrode apparatus for collecting underground hydrocarbon resources by an electrically heating method and, wherein said electrically heating method is conducted by applying a high electric potential to both electrodes attached to a pair of said conduct pipes situated on an oil sand layer.
A hot water resistant conduct pipe produced by the process comprising:
- (1) winding a polyether ether ketone resin film around the outside of a metal conduct pipe,
- (2) carrying out impregnation treatment in a vacuum and then under pressure using an impregnant resin obtained by blending a mixture of:
- (a) an epoxy resin,
- (b) a heat resisting thermoplastic resin selected from at least one member of the group consisting of polysulfone resin, polyether sulfone resin, polyphenylene sulfide resin and polytetrafluoroethylene resin, and
- (c) a catalyst capable of forming a three-dimensional network structure by forming ether bonds between molecules of the epoxy resin, wherein said epoxy resin is selected from the group consisting of bisphenol epoxy resin, alicyclic epoxy resin, glycidyl ester epoxy resin, novolak epoxy resin and cresol novolak epoxy resin, and wherein said catalyst is selected from the group consisting of a metal salt of dialkyldithiocarbamic acid, a metal salt of carboxylic acid, imidazole compounds, triethanolamine titanatetriphenyl borate complex, boron trifluoride-amine complex, trimethoxy-boroxine and boric acid anhydride, and thereafter
- (3) hardening by heating,
- wherein said conduct pipe has an electrode on an end thereof, wherein said conduct pipe is useful in an electrode apparatus for collecting underground hydrocarbon resources by an electrically heating method, and wherein said electrically heating method is conducted by applying a high electrical potential to both electrodes attached to a pair of said conduct pipes situated on an oil sand layer.
Dependencies are inferred from the claim text.