Global Patent Index - EP 1076155 A1

EP 1076155 A1 2001-02-14 - Coding system for use in a wellbore

Title (en)

Coding system for use in a wellbore

Title (de)

Kodierungssystem zur Verwendung in einem Bohrloch

Title (fr)

Système de codage pour utilisation dans un trou de forage

Publication

EP 1076155 A1 (EN)

Application

EP 99306279 A

Priority

EP 99306279 A

Abstract (en)

A coding system for use in a wellbore formed in an earth formation is provided. The system comprises a tubular conduit (3) extending in the wellbore and being provided with at least one transmitter array, each transmitter array being arranged at a selected wellbore location and including at least one transmitter arranged in a selected pattern representative for said location. Each transmitter induces a field selected from a magnetic field and an electromagnetic field into the interior of the conduit. Further is provided a sensor (30) suitable to be lowered through the conduit and to interact with each field, and means for generating a signal representative of the interaction of the sensor with each field. <IMAGE>

IPC 1-7 (main, further and additional classification)

E21B 47/09; E21B 47/024

IPC 8 full level (invention and additional information)

E21B 43/30 (2006.01); E21B 47/024 (2006.01); E21B 47/09 (2012.01)

CPC (invention and additional information)

E21B 47/0905 (2013.01); E21B 43/305 (2013.01); E21B 47/024 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1076155 A1 20010214

INPADOC legal status


2002-07-04 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

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2002-05-29 [18D] DEEMED TO BE WITHDRAWN

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- Effective date: 20010815

2001-10-31 [AKX] PAYMENT OF DESIGNATION FEES

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2001-02-14 [AK] DESIGNATED CONTRACTING STATES:

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- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-02-14 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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