EP 1052367 A3 20001227 - Preform cutting elements for rotary drill bits
Title (en)
Preform cutting elements for rotary drill bits
Title (de)
Vorgeformte Elemente für Drehbohrmeissel
Title (fr)
Eléments préformés pour trépans de forage rotatif
Publication
Application
Priority
GB 9911139 A 19990514
Abstract (en)
[origin: EP1052367A2] A preform cutting element, for a rotary drag-type drill bit, includes a facing table 10 of superhard material having a front face and a rear surface bonded to the front surface of a substrate 12 which is less hard than the superhard material, the cutting element having a peripheral surface which includes at least one cutting apex 18 defined between two adjacent regions of the peripheral surface which are disposed at an angle to one another, and the rear surface of the facing table 10 being formed with at least one protuberance 20 which projects into a correspondingly shaped recess in the substrate 12. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 10/56 (2006.01); E21B 10/567 (2006.01); E21B 10/573 (2006.01)
CPC (source: EP US)
E21B 10/5673 (2013.01 - EP US); E21B 10/5735 (2013.01 - EP)
Citation (search report)
- [XY] GB 2323110 A 19980916 - BAKER HUGHES INC [US]
- [X] GB 2329405 A 19990324 - BAKER HUGHES INC [US]
- [X] EP 0687797 A1 19951220 - CAMCO DRILLING GROUP LTD [GB]
- [Y] EP 0688937 A1 19951227 - CAMCO DRILLING GROUP LTD [GB]
- [A] EP 0841463 A2 19980513 - CAMCO DRILLING GROUP LTD [GB]
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 1052367 A2 20001115; EP 1052367 A3 20001227; EP 1052367 B1 20050406; DE 60019189 D1 20050512; DE 60019189 T2 20060309; GB 0010226 D0 20000614; GB 2350381 A 20001129; GB 2350381 B 20030611; GB 9911139 D0 19990714
DOCDB simple family (application)
EP 00303645 A 20000428; DE 60019189 T 20000428; GB 0010226 A 20000428; GB 9911139 A 19990514