Conduit tube of an electrode device for electrically heating underground hydrocarbon resources
US4577664A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1984 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Apr 17, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S138/07
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.