EP 0033192 A1 19810805 - A system for the acoustic propagation of data along a borehole drilling string.
Title (en)
A system for the acoustic propagation of data along a borehole drilling string.
Title (de)
System zur akustischen Datenweiterleitung entlang einem Bohrloch-Gestängestrang.
Title (fr)
Système pour la propagation acoustique de données le long d'une tige de forage dans un puits de forage.
Publication
Application
Priority
- US 11403880 A 19800121
- US 11403980 A 19800121
- US 11404080 A 19800121
Abstract (en)
A preferred system has a piezoelectric transducer (67a) disposed in a bore (64a) in a cylinder (63) forming part of a down-well transmitter unit (37). The transducer (67a) operates in the relatively low loss acoustic propagation range of the well drilling string (35). The efficiently coupled transmitting transducer (67a) incorporates a mass-spring-piezoelectric transmitter combination permitting a resonant operation in the desired low frequency range.
IPC 1-7
IPC 8 full level
E21B 47/16 (2006.01)
CPC (source: EP)
E21B 47/16 (2013.01)
Citation (search report)
- US 3988896 A 19761102 - MATTHEWS HUGH B
- US 4139836 A 19790213 - CHANEY PRESTON E, et al
- US 4066995 A 19780103 - MATTHEWS HUGH B
- US 3930220 A 19751230 - SHAWHAN ELBERT N
- US 3845837 A 19741105 - MCEVERS W, et al
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 81300068 A 19810108