Conduct pipe covered with electrically insulating material
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKazuo Okahashi, Ichiro Takahashi
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Abstract
A conduct pipe produced by the process of: producing a metal conduct pipe; and attaching a powdery, tubular or filmy polyether ether ketone resin to the outside surface of the metal conduct pipe by means of pressure with fusing at a temperature of 350.degree.-400.degree. C. is disclosed. The conduct pipe is particularly useful in an electrode apparatus for collecting underground hydrocarbon resources by an electrically heating method.
Claims1
A hot water resistant conduct pipe useful in an electrode apparatus for collecting underground hydrocarbon resources by an electrically heating method, produced by the process comprising:
- (1) producing a metal conduct pipe;
- and
- (2) attaching a polyether ether ketone resin to the outside surface of the metal conduct pipe by means of pressure of 30-1000 g/cm.sup.2 with fusing at a temperature of 350.degree.-400.degree. C., wherein said polyether ether ketone resin is in the form of a powder, a tube or a film, wherein said conduct pipe has an electrode on an end thereof 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.