FR2244125B1 - - Google Patents

Info

Publication number
FR2244125B1
FR2244125B1 FR7430054A FR7430054A FR2244125B1 FR 2244125 B1 FR2244125 B1 FR 2244125B1 FR 7430054 A FR7430054 A FR 7430054A FR 7430054 A FR7430054 A FR 7430054A FR 2244125 B1 FR2244125 B1 FR 2244125B1
Authority
FR
France
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
FR7430054A
Other languages
French (fr)
Other versions
FR2244125A1 (en
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.)
Trans Canada Pipelines Ltd
TransCanada Pipelines Ltd
Original Assignee
Trans Canada Pipelines Ltd
TransCanada Pipelines 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 Trans Canada Pipelines Ltd, TransCanada Pipelines Ltd filed Critical Trans Canada Pipelines Ltd
Publication of FR2244125A1 publication Critical patent/FR2244125A1/fr
Application granted granted Critical
Publication of FR2244125B1 publication Critical patent/FR2244125B1/fr
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
    • G01V3/10—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 using induction coils
    • G01V3/104—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 using induction coils using several coupled or uncoupled coils
    • G01V3/108—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 using induction coils using several coupled or uncoupled coils the emitter and the receiver coils or loops being uncoupled by positioning them perpendicularly to each other

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)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
FR7430054A 1973-09-19 1974-09-04 Expired FR2244125B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA181,449A CA980422A (en) 1973-09-19 1973-09-19 Pipeline signalling system and techniques

Publications (2)

Publication Number Publication Date
FR2244125A1 FR2244125A1 (en) 1975-04-11
FR2244125B1 true FR2244125B1 (en) 1977-11-04

Family

ID=4097847

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7430054A Expired FR2244125B1 (en) 1973-09-19 1974-09-04

Country Status (5)

Country Link
AU (1) AU474592B2 (en)
CA (1) CA980422A (en)
FR (1) FR2244125B1 (en)
GB (1) GB1475538A (en)
NL (1) NL158931B (en)

Also Published As

Publication number Publication date
CA980422A (en) 1975-12-23
AU474592B2 (en) 1976-07-29
NL158931B (en) 1978-12-15
FR2244125A1 (en) 1975-04-11
NL7410156A (en) 1975-03-21
GB1475538A (en) 1977-06-01
AU7108874A (en) 1976-01-15

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Legal Events

Date Code Title Description
ST Notification of lapse