Well installation in which electrical current is supplied for a source at the wellhead to an electrically responsive device located a substantial distance below the wellhead
US4852648A · kind A · utility
97Cited by
8References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1987 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Dec 4, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S336/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
There is disclosed a well installation having an electrically responsive device a substantial distance beneath the wellhead and apparatus for supplying electrical current to the device from a source of alternating or time varying current outside the wellhead, which apparatus includes an electrical connector comprising a first coil on the outer side and a second coil on the inner side of a non-magnetic portion of a pressure containing wall of the well, whereby the supply of varying current from the source to the first coil forms an inductive coupling between it and the second coil of the connector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.