EP 0979922 A3 20010117 - Tube rod
Title (en)
Tube rod
Title (de)
Bohrgestänge mit Innenrohr
Title (fr)
Tige de forage avec conduit intérieur
Publication
Application
Priority
GB 9816494 A 19980730
Abstract (en)
[origin: EP0979922A2] A tube rod for rock drilling has a female threaded end (12) into which a male thread (either on a male connector or on the end of another tube rod) can be screwed to form part of a drill string. The female threaded end (12) is (a) of larger external diameter than the central section (10) of the rod and (b) has an annular groove (42%) with an asymmetrical profile, the flank of this groove nearest to the threaded end being steeper than the other flank. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 17/042 (2006.01)
CPC (source: EP)
E21B 17/042 (2013.01); E21B 17/0426 (2013.01)
Citation (search report)
- [YA] EP 0220147 A2 19870429 - SANTRADE LTD [CH]
- [Y] GB 2285645 A 19950719 - PRIDECO INC [US]
- [A] US 4601491 A 19860722 - BELL JR JAMES L [US], et al
- [YA] GB 912930 A 19621212 - AMERICAN IRON & MACHINE WORKS
- [A] US 5535837 A 19960716 - CARLIN FRANK J [US]
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)
EP 0979922 A2 20000216; EP 0979922 A3 20010117; EP 0979922 B1 20040128; AT E258645 T1 20040215; CA 2278987 A1 20000130; GB 2340148 A 20000216; GB 2340148 B 20021231; GB 9816494 D0 19980923
DOCDB simple family (application)
EP 99305930 A 19990726; AT 99305930 T 19990726; CA 2278987 A 19990727; GB 9816494 A 19980730