Conduct pipe covered with electrically insulating material
US4785852A · kind A · utility
13Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1984 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Mar 21, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L25/01
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.