GB1273649A - Magnetic susceptibility logging system - Google Patents

Magnetic susceptibility logging system

Info

Publication number
GB1273649A
GB1273649A GB5544370A GB5544370A GB1273649A GB 1273649 A GB1273649 A GB 1273649A GB 5544370 A GB5544370 A GB 5544370A GB 5544370 A GB5544370 A GB 5544370A GB 1273649 A GB1273649 A GB 1273649A
Authority
GB
United Kingdom
Prior art keywords
coils
receiver
magnetic susceptibility
null
transmitter
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
GB5544370A
Inventor
George Robert Atwood
Donald Joseph Dowling
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.)
Texaco Development Corp
Original Assignee
Texaco Development Corp
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 Texaco Development Corp filed Critical Texaco Development Corp
Priority to GB5544370A priority Critical patent/GB1273649A/en
Publication of GB1273649A publication Critical patent/GB1273649A/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
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/26—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
    • G01V3/28—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device using induction coils

Abstract

1,273,649. Magnetic susceptibility measurements in boreholes. TEXACO DEVELOPMENT CORP. Nov. 21, 1970, No. 55443/70. Heading G1N. A borehole logging tool 11-14 comprises transmitter and receiver search coils 19, 17 respectively and transmitter and receiver null coils 31, 32 respectively, the null coils being spaced along the tool from the search coils so as not to be magnetically coupled with them, the transmitter coils being connected in series-aiding and the receiver coils in series - opposing Fig. 3 (not shown) whereby the measurement of magnetic susceptibility of material surrounding the borehole is compensated for variations of ambient temperature or terrestrial magnetism. The null coils are pancake-shaped so as to be substantially unaffected by the susceptibility of the surrounding material. The coils are air-cored, and coaxial with the longitudinal axis of the tool of which the case 18 is of non-magnetic material.
GB5544370A 1970-11-21 1970-11-21 Magnetic susceptibility logging system Expired GB1273649A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5544370A GB1273649A (en) 1970-11-21 1970-11-21 Magnetic susceptibility logging system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5544370A GB1273649A (en) 1970-11-21 1970-11-21 Magnetic susceptibility logging system

Publications (1)

Publication Number Publication Date
GB1273649A true GB1273649A (en) 1972-05-10

Family

ID=10473919

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5544370A Expired GB1273649A (en) 1970-11-21 1970-11-21 Magnetic susceptibility logging system

Country Status (1)

Country Link
GB (1) GB1273649A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158245A (en) * 1984-05-04 1985-11-06 Nl Industries Inc System for determining the free point of pipe stuck in a borehole
FR2611054A1 (en) * 1987-02-16 1988-08-19 Veillon Jacques Method and device for measuring the dip of geological strata during drilling
US11377946B2 (en) 2018-03-13 2022-07-05 Halliburton Energy Services, Inc. Borehole imaging tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158245A (en) * 1984-05-04 1985-11-06 Nl Industries Inc System for determining the free point of pipe stuck in a borehole
FR2611054A1 (en) * 1987-02-16 1988-08-19 Veillon Jacques Method and device for measuring the dip of geological strata during drilling
US11377946B2 (en) 2018-03-13 2022-07-05 Halliburton Energy Services, Inc. Borehole imaging tool

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees