CA2114235A1 - Communications protocol for well-logging digital telemetry system - Google Patents

Communications protocol for well-logging digital telemetry system

Info

Publication number
CA2114235A1
CA2114235A1 CA002114235A CA2114235A CA2114235A1 CA 2114235 A1 CA2114235 A1 CA 2114235A1 CA 002114235 A CA002114235 A CA 002114235A CA 2114235 A CA2114235 A CA 2114235A CA 2114235 A1 CA2114235 A1 CA 2114235A1
Authority
CA
Canada
Prior art keywords
superpackets
uplink
digital
communications
nodes
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.)
Granted
Application number
CA002114235A
Other languages
French (fr)
Other versions
CA2114235C (en
Inventor
Michael A. Montgomery
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 Technology Corp
Original Assignee
Michael A. Montgomery
Schlumberger Technology Corporation
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 Michael A. Montgomery, Schlumberger Technology Corporation filed Critical Michael A. Montgomery
Publication of CA2114235A1 publication Critical patent/CA2114235A1/en
Application granted granted Critical
Publication of CA2114235C publication Critical patent/CA2114235C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

Abstract

The present invention relates to a communications proto-cot for a digital telemetry system which enables more efficient digital data transmission between a plurality of digital commu-nications nodes: The protocol is implemented using uplink and downlink packets and superpackets. Each node forms an up-link packet which contains node data and protocols. Those packets are packaged into uplink superpackets and transmitted to a control node. Downlink superpackets containing informa-tion signifying which of the uplink superpackets were received correctly are formed and transmitted to the individual nodes. In response, any uplink superpacket received incorrectly is retrans-mitted. Additionally, the communications protocol also time stamps messages received from the nodes to provide for digital communications time correlation.
CA002114235A 1991-09-05 1992-09-04 Communications protocol for well-logging digital telemetry system Expired - Lifetime CA2114235C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/755,301 US5191326A (en) 1991-09-05 1991-09-05 Communications protocol for digital telemetry system
US755,301 1991-09-05
PCT/US1992/007564 WO1993005600A1 (en) 1991-09-05 1992-09-04 Communications protocol for well-logging digital telemetry system

Publications (2)

Publication Number Publication Date
CA2114235A1 true CA2114235A1 (en) 1993-03-18
CA2114235C CA2114235C (en) 2003-05-27

Family

ID=25038578

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002114235A Expired - Lifetime CA2114235C (en) 1991-09-05 1992-09-04 Communications protocol for well-logging digital telemetry system

Country Status (6)

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

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Also Published As

Publication number Publication date
US5191326A (en) 1993-03-02
AU2587192A (en) 1993-04-05
WO1993005600A1 (en) 1993-03-18
CA2114235C (en) 2003-05-27
EP0793881A1 (en) 1997-09-10
EP0793881B1 (en) 1998-10-07
DK0793881T3 (en) 1999-06-21
US5331318A (en) 1994-07-19

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