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FR2325250B1 - - Google Patents

Info

Publication number
FR2325250B1
FR2325250B1 FR7528377A FR7528377A FR2325250B1 FR 2325250 B1 FR2325250 B1 FR 2325250B1 FR 7528377 A FR7528377 A FR 7528377A FR 7528377 A FR7528377 A FR 7528377A FR 2325250 B1 FR2325250 B1 FR 2325250B1
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
FR7528377A
Other versions
FR2325250A1 (fr
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.)
Engie SA
Original Assignee
Gaz de France SA
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 Gaz de France SA filed Critical Gaz de France SA
Priority to FR7528377A priority Critical patent/FR2325250A1/fr
Priority to ES451552A priority patent/ES451552A1/es
Publication of FR2325250A1 publication Critical patent/FR2325250A1/fr
Application granted granted Critical
Publication of FR2325250B1 publication Critical patent/FR2325250B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
    • H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/125—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using earth as an electrical conductor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Dc Digital Transmission (AREA)
  • Noise Elimination (AREA)
FR7528377A 1975-09-16 1975-09-16 Procede et dispositif pour permettre la transmission d'un signal d'information malgre la presence d'un signal de bruit relativement plus eleve Granted FR2325250A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7528377A FR2325250A1 (fr) 1975-09-16 1975-09-16 Procede et dispositif pour permettre la transmission d'un signal d'information malgre la presence d'un signal de bruit relativement plus eleve
ES451552A ES451552A1 (es) 1975-09-16 1976-09-15 Procedimiento para permitir la transmision de una senal de informacion a pesar de la presencia de una senal de ruido relativamente mas elevada y dispositivo para su puesta en practica.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7528377A FR2325250A1 (fr) 1975-09-16 1975-09-16 Procede et dispositif pour permettre la transmission d'un signal d'information malgre la presence d'un signal de bruit relativement plus eleve

Publications (2)

Publication Number Publication Date
FR2325250A1 FR2325250A1 (fr) 1977-04-15
FR2325250B1 true FR2325250B1 (fr) 1979-03-23

Family

ID=9160041

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7528377A Granted FR2325250A1 (fr) 1975-09-16 1975-09-16 Procede et dispositif pour permettre la transmission d'un signal d'information malgre la presence d'un signal de bruit relativement plus eleve

Country Status (2)

Country Link
ES (1) ES451552A1 (fr)
FR (1) FR2325250A1 (fr)

Also Published As

Publication number Publication date
FR2325250A1 (fr) 1977-04-15
ES451552A1 (es) 1977-10-16

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Legal Events

Date Code Title Description
ST Notification of lapse