EP 0865613 A1 19980923 - COMPOSITE MATERIAL STRUCTURES HAVING REDUCED SIGNAL ATTENUATION
Title (en)
COMPOSITE MATERIAL STRUCTURES HAVING REDUCED SIGNAL ATTENUATION
Title (de)
STRUKTUREN AUS VERBUNDWERKSTOFFEN MIT REDUZIERTER SIGNALDÄMPFUNG
Title (fr)
STRUCTURES DE MATERIAUX COMPOSITES POSSEDANT UNE ATTENUATION DE SIGNAL REDUITE
Publication
Application
Priority
- CA 9600768 W 19961122
- US 56733795 A 19951205
- US 74066596 A 19961031
Abstract (en)
[origin: WO9721117A1] The present invention relates to composite material structures having reduced signal attenuation properties. In particular, the invention relates to composite drill string components with electromagnetic properties and acoustic properties that enable the use of electromagnetic, acoustic and nuclear sensing equipment to obtain data from a wellbore from within a drill pipe. In a specific embodiment, a composite tube is incorporated with end-fittings which enable its incorporation into a drill string thereby permitting the use of logging equipment from within the composite tube.
IPC 1-7
IPC 8 full level
E21B 17/00 (2006.01); E21B 17/10 (2006.01); E21B 47/01 (2012.01); E21B 47/08 (2012.01); E21B 47/12 (2012.01); G01V 1/40 (2006.01); G01V 3/18 (2006.01); G01V 5/04 (2006.01)
CPC (source: EP US)
E21B 17/00 (2013.01 - EP); E21B 17/003 (2013.01 - EP); E21B 17/10 (2013.01 - EP); E21B 47/01 (2013.01 - EP US); E21B 47/085 (2020.05 - EP); E21B 47/13 (2020.05 - EP); G01V 1/40 (2013.01 - EP); G01V 3/18 (2013.01 - EP); G01V 5/04 (2013.01 - EP)
Citation (search report)
See references of WO 9721117A1
Designated contracting state (EPC)
DE DK ES FR GB GR IE IT NL PT
DOCDB simple family (publication)
WO 9721117 A1 19970612; AU 7558996 A 19970627; CN 1203671 A 19981230; EP 0865613 A1 19980923; MX 9804443 A 19981231; NO 982427 D0 19980528; NO 982427 L 19980731
DOCDB simple family (application)
CA 9600768 W 19961122; AU 7558996 A 19961122; CN 96198793 A 19961122; EP 96937962 A 19961122; MX 9804443 A 19980604; NO 982427 A 19980528