EP 1194678 B1 20050406 - DATA TRANSMISSION IN PIPELINE SYSTEMS
Title (en)
DATA TRANSMISSION IN PIPELINE SYSTEMS
Title (de)
DATENÜBERTRAGUNG IN EINEM ROHRSYSTEM
Title (fr)
TRANSMISSION DE DONNEES DANS DES SYSTEMES DE PIPELINES
Publication
Application
Priority
- GB 0002538 W 20000630
- GB 9915968 A 19990707
- GB 9924027 A 19991011
Abstract (en)
[origin: WO0104461A1] A first set of apparatus is arranged for transmitting data from a point in a cased section of a well (1, 3) to a remote location. The apparatus may be used as a relay station (6) to increase operational depth. Signals are applied to and received from the string (1) at the relay station (6) and a selected length of the string (1) is provided with insulating spacer means (9) on either side of the relay station to ensure that the string (1) and casing (3) are effectively isolated for a selected minimum distance. This enables potential differences to be both applied to and detected from the string (1), thus allowing data transmission and reception. A second set of apparatus (figure 8) is arranged for transmitting from an internal unit (408) inside a cased section of the well (401, 403) to the immediate surrounding area outside the casing (403). The internal unit (408) injects current into the string (401). A toroid (415) which surrounds the casing (403) is provided to pick up signals. Spaced connections between the string (401) and casing (403) are provided by conductive packers (411). A mismatch in the current flowing in the string (401) and casing (403) is generated so that a non-zero flux is seen by the toroid and hence a signal can be received.
IPC 1-7
IPC 8 full level
E21B 47/12 (2012.01); F17D 5/06 (2006.01); H04B 3/00 (2006.01)
CPC (source: EP)
E21B 47/13 (2020.05); F17D 5/06 (2013.01)
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)
WO 0104461 A1 20010118; AP 2001002381 A0 20011231; AT E292743 T1 20050415; AU 5694500 A 20010130; BR 0012635 A 20020402; CA 2378329 A1 20010118; CA 2378329 C 20070918; CN 1372615 A 20021002; DE 60019290 D1 20050512; EA 200101247 A1 20020829; EP 1194678 A1 20020410; EP 1194678 B1 20050406; JP 2003504543 A 20030204; KR 20020030075 A 20020422; MX PA02000007 A 20030721; NO 20020041 D0 20020104; NO 20020041 L 20020307; NO 320860 B1 20060206; OA 11986 A 20060418
DOCDB simple family (application)
GB 0002538 W 20000630; AP 2001002381 A 20000630; AT 00942241 T 20000630; AU 5694500 A 20000630; BR 0012635 A 20000630; CA 2378329 A 20000630; CN 00812514 A 20000630; DE 60019290 T 20000630; EA 200101247 A 20000630; EP 00942241 A 20000630; JP 2001509845 A 20000630; KR 20027000178 A 20020107; MX PA02000007 A 20000630; NO 20020041 A 20020104; OA 1200200006 A 20000630