Electric dipole surface antenna configurations for electromagnetic wellbore instrument telemetry
US11073013B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2015 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Oct 15, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for detecting an electromagnetic signal originating in a wellbore includes an antenna comprising a pair of spaced apart electrodes in the ground spaced apart by a first distance having a midpoint at a second distance from the wellbore. The system includes at least one of a shielded electrical cable connecting each electrode to an input of a detector circuit, wherein the shielding is connected to produce common mode noise rejection; b) a second spaced apart electrode pair antenna spaced apart by one half the first distance and having a midpoint spaced √2/2 times the second distance from the surface of the wellbore, c) a second electrode pair antenna having a common midpoint with and being orthogonal to the at least one electric dipole antenna; and d) wherein the at least one electric dipole antenna is disposed in a second wellbore, the second wellbore having substantially no electrically conductive pipe therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.