EP 0955446 A3 20000816 - Preform cutting element
Title (en)
Preform cutting element
Title (de)
Vorgeformtes Schneidelement
Title (fr)
Elément de coupe préformé
Publication
Application
Priority
GB 9809690 A 19980508
Abstract (en)
[origin: EP0955446A2] A preform cutting element, for use in a drag-type drill bit, includes a facing table (10) of polycrystalline diamond having a front face (12), a peripheral surface (13), and a rear surface (14) bonded to the front face of a tungsten carbide substrate (11). The rear face (14) ofthe diamond facing table is integrally formed with a single protuberance (19), adjacent the periphery ofthe element, which extends into a correspondingly shaped recess in the substrate (11). <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)
E21B 10/5676 (2013.01); E21B 10/5735 (2013.01)
Citation (search report)
- [XY] EP 0692607 A2 19960117 - DE BEERS IND DIAMOND [ZA]
- [X] US 5435403 A 19950725 - TIBBITTS GORDON A [US]
- [X] US 5706906 A 19980113 - JUREWICZ STEPHEN R [US], et al
- [Y] US 4811801 A 19890314 - SALESKY WILLIAM J [US], et al
- [PX] US 5887580 A 19990330 - EYRE RONALD K [US]
- [PXPA] EP 0857537 A1 19980812 - DE BEERS IND DIAMOND [ZA]
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 0955446 A2 19991110; EP 0955446 A3 20000816; EP 0955446 B1 20040728; DE 69918891 D1 20040902; DE 69918891 T2 20050804; GB 2337063 A 19991110; GB 9809690 D0 19980701; GB 9910223 D0 19990630
DOCDB simple family (application)
EP 99303483 A 19990504; DE 69918891 T 19990504; GB 9809690 A 19980508; GB 9910223 A 19990505