EP 0058061 A3 19820901 - TOOLS FOR UNDERGROUND FORMATIONS
Title (en)
TOOLS FOR UNDERGROUND FORMATIONS
Publication
Application
Priority
- GB 8103820 A 19810207
- GB 8104537 A 19810213
Abstract (en)
[origin: EP0058061A2] A tool for an underground formation e.g. an eccentric hole opener, has an eccentric portion the end face of which has cutting elements, preferably poly-crystalline diamond compacts. According to the invention the elements are distributed about the end face in an arrangement to reduce the imbalance in horizontal cutting forces caused by the eccentricity of the tool.
IPC 1-7
IPC 8 full level
E21B 10/26 (2006.01); E21B 10/42 (2006.01); E21B 10/43 (2006.01); E21B 17/10 (2006.01)
CPC (source: EP US)
E21B 10/265 (2020.05 - EP US); E21B 10/43 (2013.01 - EP US); E21B 17/1092 (2013.01 - EP)
Citation (search report)
- [X] FR 1307849 A 19621026 - ATLANTIC REFINING CO
- [X] US 2074951 A 19370323 - ZUBLIN JOHN A
- [A] US 3871488 A 19750318 - SABRE DANIEL R
- [A] US 3851719 A 19741203 - THOMPSON C, et al
- [A] US 3237705 A 19660301 - WILLIAMS JR EDWARD B
- [A] US 4098363 A 19780704 - ROHDE HEINO J, et al
- [A] DE 115257 C
- [A] BE 513754 A
Designated contracting state (EPC)
BE CH DE FR GB LI NL
DOCDB simple family (publication)
EP 0058061 A2 19820818; EP 0058061 A3 19820901; NO 820347 L 19820809
DOCDB simple family (application)
EP 82300578 A 19820205; NO 820347 A 19820205