CA2201541A1 - Signal recognition system for wellbore telemetry - Google Patents

Signal recognition system for wellbore telemetry

Info

Publication number
CA2201541A1
CA2201541A1 CA002201541A CA2201541A CA2201541A1 CA 2201541 A1 CA2201541 A1 CA 2201541A1 CA 002201541 A CA002201541 A CA 002201541A CA 2201541 A CA2201541 A CA 2201541A CA 2201541 A1 CA2201541 A1 CA 2201541A1
Authority
CA
Canada
Prior art keywords
signal
telemetry
received
signals
probability
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
CA002201541A
Other languages
French (fr)
Other versions
CA2201541C (en
Inventor
Benjamin Peter Jeffryes
Timothy Tristram Jervis
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 Canada Ltd
Original Assignee
Schlumberger Canada 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 Schlumberger Canada Ltd filed Critical Schlumberger Canada Ltd
Priority claimed from US08/838,557 external-priority patent/US5955966A/en
Publication of CA2201541A1 publication Critical patent/CA2201541A1/en
Application granted granted Critical
Publication of CA2201541C publication Critical patent/CA2201541C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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  • Arrangements For Transmission Of Measured Signals (AREA)
  • Selective Calling Equipment (AREA)

Abstract

Methods and apparatus are described for recognizing wellbore telemetry signals, wherein a received analog telemetry signal is compared to a number of possible analog signals. The probability of representing the received signal is determined for each of the possible analog signals. By selecting the signal with the highest probability, the received signal is demodulated. For calculating the probability, Bayes' method or any equivalent thereof is used. In variants, this probabilistic method is used to determine the synchronization point of the telemetry signal and for controlling the noise removal therefrom. The method and apparatus show increased accuracy in recognizing and demodulating the received signals.
CA002201541A 1996-04-09 1997-04-02 Signal recognition system for wellbore telemetry Expired - Fee Related CA2201541C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9607299.6A GB9607299D0 (en) 1996-04-09 1996-04-09 Signal recognition system for wellbore telemetry
GB9607299.6 1996-04-09
US08/838,557 US5955966A (en) 1996-04-09 1997-04-09 Signal recognition system for wellbore telemetry

Publications (2)

Publication Number Publication Date
CA2201541A1 true CA2201541A1 (en) 1997-10-09
CA2201541C CA2201541C (en) 2005-08-09

Family

ID=26309078

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002201541A Expired - Fee Related CA2201541C (en) 1996-04-09 1997-04-02 Signal recognition system for wellbore telemetry

Country Status (3)

Country Link
CA (1) CA2201541C (en)
GB (1) GB9607299D0 (en)
NO (1) NO317491B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6023658A (en) * 1996-04-09 2000-02-08 Schlumberger Technology Corporation Noise detection and suppression system and method for wellbore telemetry
GB2413662A (en) * 2004-04-26 2005-11-02 Schlumberger Holdings Multimodal decomposition of well bore data

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0914510B1 (en) 2008-10-14 2019-07-16 Prad Research And Development Limited METHODS TO AUTOMATE OR PARTIALLY AUTOMATE OPTIMIZATION OF AN AUTOMATED OR PARTIALLY AUTOMATED DRILLING OPERATION, SYSTEM TO AUTOMATE AUTOMATICALLY TO PRODUCT PERFORMANCE, AUTOMATED PROCESSING PERFORMANCE DRILLING CONTROL
CN121410765B (en) * 2025-12-25 2026-04-03 西安奥华电子仪器股份有限公司 Neutron detector pulse signal intelligent screening method and system based on deep learning

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6023658A (en) * 1996-04-09 2000-02-08 Schlumberger Technology Corporation Noise detection and suppression system and method for wellbore telemetry
GB2413662A (en) * 2004-04-26 2005-11-02 Schlumberger Holdings Multimodal decomposition of well bore data
GB2413662B (en) * 2004-04-26 2006-10-11 Schlumberger Holdings Multimodal decomposition

Also Published As

Publication number Publication date
NO971610L (en) 1997-10-10
NO317491B1 (en) 2004-11-08
CA2201541C (en) 2005-08-09
GB9607299D0 (en) 1996-06-12
NO971610D0 (en) 1997-04-08

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Effective date: 20130402