NO893407L - APPARATUS FOR MICRO-INDUCTIVE EXAMINATION OF BASIC FORMATION. - Google Patents
APPARATUS FOR MICRO-INDUCTIVE EXAMINATION OF BASIC FORMATION.Info
- Publication number
- NO893407L NO893407L NO893407A NO893407A NO893407L NO 893407 L NO893407 L NO 893407L NO 893407 A NO893407 A NO 893407A NO 893407 A NO893407 A NO 893407A NO 893407 L NO893407 L NO 893407L
- Authority
- NO
- Norway
- Prior art keywords
- antenna
- inductive
- examination
- micro
- antenna element
- Prior art date
Links
Abstract
Et apparat av veggkontakt-typen for mikro-induktiv undersøkelse av en karakteristikk ved en grunnformasJon som gjennom- løpes av et borehull, omfatter et antennesett montert i et lang- strakt legeme anordnet for glidende kontakt med veggen i bore- hullet. Antennesettet omfatter et første antenne-element og andre og tredje antenne-elementer som har posisjoner og orien- teringer for å bringe dem i elektromagnetisk symmetri i forhold til det første antenne-element. Det er innbefattet anordninger for differensiell sammenkobling av det annet og det tredje antenne-element. Enten det første antenne-element eller de differensielt sammenkoblede andre og tredje antenne-elementer kan energiseres for å virke som en sender, mens de andre funk- sjonerer som en mottager for signaler som indikerer karakteri- stikken. Alternative variasjoner omfatter et .ledende legeme for fokusering av elektromagnetisk energi, et ledende bakplan son> muliggjør halvsløyfe-antenne-eleraenter og en elektro- kvasistacisk skjerm som forbedrer antennesettets ytelse.An apparatus of the wall contact type for micro-inductive examination of a characteristic of a basic formation traversed by a borehole comprises an antenna set mounted in an elongated body arranged for sliding contact with the wall of the borehole. The antenna set comprises a first antenna element and second and third antenna elements having positions and orientations to bring them in electromagnetic symmetry relative to the first antenna element. Devices for differential coupling of the second and third antenna elements are included. Either the first antenna element or the differentially interconnected second and third antenna elements can be energized to act as a transmitter, while the second functions as a receiver for signals indicating the characteristics. Alternative variations include a conductive body for focusing electromagnetic energy, a conductive backplane which enables half-loop antenna ele- rants, and an electro-quasi-static screen that improves antenna set performance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO893407A NO893407D0 (en) | 1984-05-31 | 1989-08-24 | APPARATUS FOR MICRO-INDUCTIVE EXAMINATION OF BASIC FORMATION. |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/616,327 US4780678A (en) | 1984-05-31 | 1984-05-31 | Apparatus for microinductive investigation of earth formations |
US06/616,325 US4845433A (en) | 1984-05-31 | 1984-05-31 | Apparatus for microinductive investigation of earth formations |
US06/616,323 US4712070A (en) | 1984-05-31 | 1984-05-31 | Apparatus for microinductive investigation of earth formations |
US06/616,326 US4739272A (en) | 1984-05-31 | 1984-05-31 | Apparatus for microinductive investigation of earth formations with improved electroquasistatic shielding |
NO851741A NO172086C (en) | 1984-05-31 | 1985-05-02 | APPARATUS FOR MICRO-INDUCTIVE EXAMINATION OF BASIC FORMATION |
NO893407A NO893407D0 (en) | 1984-05-31 | 1989-08-24 | APPARATUS FOR MICRO-INDUCTIVE EXAMINATION OF BASIC FORMATION. |
Publications (2)
Publication Number | Publication Date |
---|---|
NO893407L true NO893407L (en) | 1985-12-02 |
NO893407D0 NO893407D0 (en) | 1989-08-24 |
Family
ID=27555239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO893407A NO893407D0 (en) | 1984-05-31 | 1989-08-24 | APPARATUS FOR MICRO-INDUCTIVE EXAMINATION OF BASIC FORMATION. |
Country Status (1)
Country | Link |
---|---|
NO (1) | NO893407D0 (en) |
-
1989
- 1989-08-24 NO NO893407A patent/NO893407D0/en unknown
Also Published As
Publication number | Publication date |
---|---|
NO893407D0 (en) | 1989-08-24 |
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