GB843448A - Apparatus for geophysical prospecting - Google Patents

Apparatus for geophysical prospecting

Info

Publication number
GB843448A
GB843448A GB2855056A GB2855056A GB843448A GB 843448 A GB843448 A GB 843448A GB 2855056 A GB2855056 A GB 2855056A GB 2855056 A GB2855056 A GB 2855056A GB 843448 A GB843448 A GB 843448A
Authority
GB
United Kingdom
Prior art keywords
coil
coils
deposits
magnetic
linometer
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB2855056A
Inventor
George Harrison Mclaughlin
William Oliver Cartier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NUCOM Ltd
Original Assignee
NUCOM 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
Application filed by NUCOM Ltd filed Critical NUCOM Ltd
Priority to GB2855056A priority Critical patent/GB843448A/en
Publication of GB843448A publication Critical patent/GB843448A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/082—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices operating with fields produced by spontaneous potentials, e.g. electrochemical or produced by telluric currents

Landscapes

  • Remote Sensing (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

843,448. Electric tests. NUCOM Ltd. Sept. 18, 1956, No. 28550/56. Class 37. The presence of magnetic or conductive deposits is determined by a pair of magnetically cored coil fixed relatively angularly and feeding amplifying and filtering circuits so as to respond transient magnetic field variations. The Specification indicates that in the absence of such deposits the transient magnetic fields are horizontally polarised and that the presence of such deposits introduces some degree of vertical polarisation. Accordingly on " A" coil and a " B " coil, both in two parts are mounted at right angles to each other on a rotatable axis 4. Each coil is mounted on a former consisting of iron laminations 2 and wooden spacers 3. The coils are tuned to frequencies of 450 and 500 cycles/sec respectively by condensers 7 in order to avoid coupling and each coil feeds an amplifier 8a, attenuator 9a, further amplifier 10a, filter 11a, rectifier 12a and integrator 13a and the outputs of the two amplifiers are compared in a differential unit 14 and indicated on a meter 15. A linometer 23 is mounted between the coils. In use, if no conductive or magnetic deposits are present the difference output of the two coils will be zero when they are in the position shown. A distorting deposit will mean that a minimum output from the coils will occur in a different position as indicated by the linometer. Specification 825,046 is referred to.
GB2855056A 1956-09-18 1956-09-18 Apparatus for geophysical prospecting Expired GB843448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2855056A GB843448A (en) 1956-09-18 1956-09-18 Apparatus for geophysical prospecting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2855056A GB843448A (en) 1956-09-18 1956-09-18 Apparatus for geophysical prospecting

Publications (1)

Publication Number Publication Date
GB843448A true GB843448A (en) 1960-08-04

Family

ID=10277400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2855056A Expired GB843448A (en) 1956-09-18 1956-09-18 Apparatus for geophysical prospecting

Country Status (1)

Country Link
GB (1) GB843448A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556846A1 (en) * 1983-12-19 1985-06-21 Exxon Production Research Co APPARATUS FOR MEASURING THE ANGLE OF THE VECTOR OF THE TOTAL ELECTRO-MAGNETIC FIELD OF THE EARTH IN RELATION TO THE HORIZONTAL

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556846A1 (en) * 1983-12-19 1985-06-21 Exxon Production Research Co APPARATUS FOR MEASURING THE ANGLE OF THE VECTOR OF THE TOTAL ELECTRO-MAGNETIC FIELD OF THE EARTH IN RELATION TO THE HORIZONTAL

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