EP 0565141 A2 19931013 - Acoustic data transmission through a drill string.
Title (en)
Acoustic data transmission through a drill string.
Title (de)
Akustische Datenübertragung über ein Bohrgestänge.
Title (fr)
Transmission de données acoustiques au travers d'un cordon de tube de forage.
Publication
Application
Priority
- EP 93111079 A 19890421
- US 18432688 A 19880421
Abstract (en)
Acoustical signals are transmitted through a drill string by canceling upward moving acoustical noise and by preconditioning the data in recognition of the comb filter impedance characteristics of the drill string. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 47/16 (2006.01)
CPC (source: EP)
E21B 47/16 (2013.01)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 93111079 A 19890421