DK0793881T3 - Fremgangsmåde til at tidsstemple en meddelelse med angivelse af tidspunktet for meddelelsens dannelse - Google Patents

Fremgangsmåde til at tidsstemple en meddelelse med angivelse af tidspunktet for meddelelsens dannelse

Info

Publication number
DK0793881T3
DK0793881T3 DK92919939T DK92919939T DK0793881T3 DK 0793881 T3 DK0793881 T3 DK 0793881T3 DK 92919939 T DK92919939 T DK 92919939T DK 92919939 T DK92919939 T DK 92919939T DK 0793881 T3 DK0793881 T3 DK 0793881T3
Authority
DK
Denmark
Prior art keywords
message
timestamping
time
formation
message indicating
Prior art date
Application number
DK92919939T
Other languages
Danish (da)
English (en)
Inventor
Michael A Montgomery
Original Assignee
Schlumberger Technology 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 Technology Corp filed Critical Schlumberger Technology Corp
Application granted granted Critical
Publication of DK0793881T3 publication Critical patent/DK0793881T3/da

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Classifications

    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/22—Transmitting seismic signals to recording or processing apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
    • G01V11/002—Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Geophysics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Computer Security & Cryptography (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Communication Control (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
DK92919939T 1991-09-05 1992-09-04 Fremgangsmåde til at tidsstemple en meddelelse med angivelse af tidspunktet for meddelelsens dannelse DK0793881T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/755,301 US5191326A (en) 1991-09-05 1991-09-05 Communications protocol for digital telemetry system
PCT/US1992/007564 WO1993005600A1 (fr) 1991-09-05 1992-09-04 Protocole de communication pour systeme de telemetrie numerique utilise en diagraphie

Publications (1)

Publication Number Publication Date
DK0793881T3 true DK0793881T3 (da) 1999-06-21

Family

ID=25038578

Family Applications (1)

Application Number Title Priority Date Filing Date
DK92919939T DK0793881T3 (da) 1991-09-05 1992-09-04 Fremgangsmåde til at tidsstemple en meddelelse med angivelse af tidspunktet for meddelelsens dannelse

Country Status (6)

Country Link
US (2) US5191326A (fr)
EP (1) EP0793881B1 (fr)
AU (1) AU2587192A (fr)
CA (1) CA2114235C (fr)
DK (1) DK0793881T3 (fr)
WO (1) WO1993005600A1 (fr)

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WO1993005600A1 (fr) 1993-03-18
CA2114235A1 (fr) 1993-03-18
CA2114235C (fr) 2003-05-27
AU2587192A (en) 1993-04-05
EP0793881A1 (fr) 1997-09-10
US5191326A (en) 1993-03-02
US5331318A (en) 1994-07-19
EP0793881B1 (fr) 1998-10-07

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