EP 1076155 A1 20010214 - 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
Application
Priority
EP 99306279 A 19990809
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
IPC 8 full level
E21B 43/30 (2006.01); E21B 47/024 (2006.01); E21B 47/09 (2012.01)
CPC (source: EP)
E21B 43/305 (2013.01); E21B 47/024 (2013.01); E21B 47/092 (2020.05)
Citation (search report)
- [X] US 3105548 A 19631001 - OWNBY WARREN G
- [XY] US 4244424 A 19810113 - TALBOT KENNETH J
- [Y] US 5666050 A 19970909 - BOULDIN BRETT [US], et al
- [X] US 4121657 A 19781024 - MCCLURE TOMMY L
- [X] US 3513912 A 19700526 - BOOP GENE T
- [X] EP 0301671 A2 19890201 - SHELL INT RESEARCH [NL]
- [X] US 5351755 A 19941004 - HOWLETT DONALD L [US]
- [X] US 5394950 A 19950307 - GARDES ROBERT A [US]
- [A] US 5720344 A 19980224 - NEWMAN FREDERIC M [US]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 99306279 A 19990809