EP 0330558 B1 19911113 - METHOD AND DEVICE FOR TRANSMITTING INFORMATION BY CABLE AND BY MUD WAVES
Title (en)
METHOD AND DEVICE FOR TRANSMITTING INFORMATION BY CABLE AND BY MUD WAVES
Publication
Application
Priority
FR 8802095 A 19880222
Abstract (en)
[origin: EP0330558A1] The present invention relates to a device and a method making it possible to transfer information between the bottom of a well and the surface. The method according to the invention is characterised in that the information is transferred by means of either a mud-wave generator or electromagnetic waves or a cable, simultaneously or in succession. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 47/12 (2012.01); E21B 47/18 (2012.01)
CPC (source: EP US)
E21B 47/12 (2013.01 - EP US); E21B 47/13 (2020.05 - EP US); E21B 47/18 (2013.01 - EP US); E21B 47/26 (2020.05 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0330558 A1 19890830; EP 0330558 B1 19911113; CA 1304073 C 19920623; DE 68900423 D1 19911219; FR 2627649 A1 19890825; FR 2627649 B1 19901026; NO 171574 B 19921221; NO 171574 C 19930331; NO 890709 D0 19890220; NO 890709 L 19890823; US 4945761 A 19900807
DOCDB simple family (application)
EP 89400472 A 19890221; CA 591813 A 19890222; DE 68900423 T 19890221; FR 8802095 A 19880222; NO 890709 A 19890220; US 31343789 A 19890222