GB721115A - Improvements in or relating to induction well logging apparatus - Google Patents

Improvements in or relating to induction well logging apparatus

Info

Publication number
GB721115A
GB721115A GB21032/53A GB2103253A GB721115A GB 721115 A GB721115 A GB 721115A GB 21032/53 A GB21032/53 A GB 21032/53A GB 2103253 A GB2103253 A GB 2103253A GB 721115 A GB721115 A GB 721115A
Authority
GB
United Kingdom
Prior art keywords
bore
coils
hole
support
fins
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
GB21032/53A
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.)
Schlumberger Well Surveying Corp
Original Assignee
Schlumberger Well Surveying 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 Schlumberger Well Surveying Corp filed Critical Schlumberger Well Surveying Corp
Publication of GB721115A publication Critical patent/GB721115A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Earth Drilling (AREA)

Abstract

721,115. Electric well-logging apparatus. SCHLUMBERGER WELL SURVEYING CORPORATION. July 29,1953 [Aug. 5,1952], No. 21032/53. Class 37. Well-logging apparatus in which the earth formations surrounding the bore-hole are investigated by noting the signals in pick-up coils located in the bore-hole is characterized in that the apparatus in the bore-hole is supplied with a plurality of substantially vertical fins of insulating material, whereby eddy-currents in the conductive drilling liquid are reduced. As shown (Fig. 1), inside a bore-hole 11 containing inductive drilling liquid 12 is located a support 18 containing a series of coils 13-17 in slots on the support, coils 13, 15, 16 being fed in combination from an oscillator inside the support 18, and coils 14, 17 being connected in series opposition to indicating apparatus 31. Three longitudinal, insulating, flexible fins 23, 24, 25 are attached to the support 18, either tangentially or radially, thereby restricting the eddy currents in the conducting fluid 12. Each fin 23, 24, 25 may be discontinuous, comprising a section opposite at least each of the principal coils, with or without gaps between the sections, to facilitate passing the apparatus through irregular holes. The fins also help to maintain the apparatus central in the bore-hole.
GB21032/53A 1952-08-05 1953-07-29 Improvements in or relating to induction well logging apparatus Expired GB721115A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US721115XA 1952-08-05 1952-08-05

Publications (1)

Publication Number Publication Date
GB721115A true GB721115A (en) 1954-12-29

Family

ID=22105639

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21032/53A Expired GB721115A (en) 1952-08-05 1953-07-29 Improvements in or relating to induction well logging apparatus

Country Status (1)

Country Link
GB (1) GB721115A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146126A (en) * 1983-06-27 1985-04-11 Nl Industries Inc Drill stem logging system
GB2311139A (en) * 1996-03-14 1997-09-17 Western Atlas Int Inc Eddy current suppression in well logging
WO2005078481A1 (en) * 2004-02-04 2005-08-25 Baker Hughes Incorporated Method of eliminating conductive drill parasitic influence on the measurements of transient electromagnetic components in mwd tools
CN100419459C (en) * 2004-02-04 2008-09-17 贝克休斯公司 Method for eliminating the effluence of electricity-conductive drill autoeciousness when measuring mwd tool transient electromagnetic heft
EP3139200A1 (en) * 2015-09-01 2017-03-08 Sondex Wireline Limited Resistivity imager with reduced borehole loading

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146126A (en) * 1983-06-27 1985-04-11 Nl Industries Inc Drill stem logging system
GB2311139A (en) * 1996-03-14 1997-09-17 Western Atlas Int Inc Eddy current suppression in well logging
FR2752622A1 (en) * 1996-03-14 1998-02-27 Western Atlas Int Inc METHOD AND APPARATUS FOR SUPPRESSION OF FUEL CURRENTS IN PETROLEUM OPERATION
GB2311139B (en) * 1996-03-14 2000-09-13 Western Atlas Int Inc Eddy current suppression in well logging
WO2005078481A1 (en) * 2004-02-04 2005-08-25 Baker Hughes Incorporated Method of eliminating conductive drill parasitic influence on the measurements of transient electromagnetic components in mwd tools
GB2425609A (en) * 2004-02-04 2006-11-01 Baker Hughes Inc Method of eliminating conductive drill parasitic influence on the measurements of transient electromagnetic components in MWD tools
GB2425609B (en) * 2004-02-04 2008-07-23 Baker Hughes Inc Method of eliminating conductive drill parasitic influence on the measurements of transient electromagnetic components in MWD tools
CN100419459C (en) * 2004-02-04 2008-09-17 贝克休斯公司 Method for eliminating the effluence of electricity-conductive drill autoeciousness when measuring mwd tool transient electromagnetic heft
EP3139200A1 (en) * 2015-09-01 2017-03-08 Sondex Wireline Limited Resistivity imager with reduced borehole loading
CN106837316A (en) * 2015-09-01 2017-06-13 桑德克斯有线有限公司 Resistivity imaging device with the well load lowered
US10082592B2 (en) 2015-09-01 2018-09-25 Sondex Wireline Limited Resistivity imager with reduced borehole loading

Similar Documents

Publication Publication Date Title
US3305771A (en) Inductive resistivity guard logging apparatus including toroidal coils mounted on a conductive stem
US2790138A (en) Induction well logging
US2582314A (en) Electromagnetic well logging system
US2359894A (en) Well logging method and apparatus
US2712630A (en) Methods and apparatus for electrical logging of wells
ES400383A1 (en) Apparatus for determining the resistivity of a subsurface earth formation at different lateral distances from a bore hole wall
ES8502202A1 (en) Apparatus and method for logging wells while drilling.
Large et al. Radio transmission to and from underground coal mines-theory and measurement
GB1235656A (en) Improvements in or relating to earth drilling apparatus
US2669688A (en) Resistivity apparatus for obtaining indications of permeable formations traversed byboreholes
ES386865A1 (en) Induction logging methods and apparatus using more than one phase component of the received signal
US2190686A (en) Mineral exploration
US2357178A (en) Method and apparatus for investigating boreholes
GB721115A (en) Improvements in or relating to induction well logging apparatus
US2501953A (en) Electrical well logging system
US2376168A (en) Well logging
US2632795A (en) Retractable electrode for well casing measurements
US2761103A (en) Induction well logging apparatus
GB2019004A (en) Well Logging Methods and Apparatus
US2834421A (en) Low noise level acoustic logging system
US3748573A (en) Electrical logging system for use with a drill string
GB1016498A (en) Improvements on exploratory devices used in borings
US2948846A (en) Well logging systems
US2288876A (en) Magnetic logging
US2997645A (en) Induction well logging system