NO893407L - Apparat for mikro-induktiv undersoekelse av grunnformasjoner. - Google Patents

Apparat for mikro-induktiv undersoekelse av grunnformasjoner.

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
Application number
NO893407A
Other languages
English (en)
Other versions
NO893407D0 (no
Inventor
Robert L Kleinberg
Weng Cho Chew
Brian Clark
Douglas D Griffin
Donald G Dudley
Original Assignee
Schlumberger Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/616,327 external-priority patent/US4780678A/en
Priority claimed from US06/616,323 external-priority patent/US4712070A/en
Priority claimed from US06/616,326 external-priority patent/US4739272A/en
Priority claimed from US06/616,325 external-priority patent/US4845433A/en
Priority claimed from NO851741A external-priority patent/NO172086C/no
Publication of NO893407L publication Critical patent/NO893407L/no
Application filed by Schlumberger Ltd filed Critical Schlumberger Ltd
Priority to NO893407A priority Critical patent/NO893407D0/no
Publication of NO893407D0 publication Critical patent/NO893407D0/no

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  • Geophysics And Detection Of Objects (AREA)

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.
NO893407A 1984-05-31 1989-08-24 Apparat for mikro-induktiv undersoekelse av grunnformasjoner. NO893407D0 (no)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NO893407A NO893407D0 (no) 1984-05-31 1989-08-24 Apparat for mikro-induktiv undersoekelse av grunnformasjoner.

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
US06/616,323 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
US06/616,325 US4845433A (en) 1984-05-31 1984-05-31 Apparatus for microinductive investigation of earth formations
NO851741A NO172086C (no) 1984-05-31 1985-05-02 Apparat for mikro-induktiv undersoekelse av grunnformasjoner
NO893407A NO893407D0 (no) 1984-05-31 1989-08-24 Apparat for mikro-induktiv undersoekelse av grunnformasjoner.

Publications (2)

Publication Number Publication Date
NO893407L true NO893407L (no) 1985-12-02
NO893407D0 NO893407D0 (no) 1989-08-24

Family

ID=27555239

Family Applications (1)

Application Number Title Priority Date Filing Date
NO893407A NO893407D0 (no) 1984-05-31 1989-08-24 Apparat for mikro-induktiv undersoekelse av grunnformasjoner.

Country Status (1)

Country Link
NO (1) NO893407D0 (no)

Also Published As

Publication number Publication date
NO893407D0 (no) 1989-08-24

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