EP 0878602 A3 19990825 - Cutting elements faced with superhard material
Title (en)
Cutting elements faced with superhard material
Title (de)
Schneidelement mit einer Oberfläche aus superhartem Werkstoff
Title (fr)
Elément de coupe avec une surface en matériaux extra-dur
Publication
Application
Priority
GB 9709861 A 19970516
Abstract (en)
[origin: EP0878602A2] A preform element, such as may be used as a cutting element in a drag-type rotary drill bit, comprises a polycrystalline diamond facing table bonded to a tungsten carbide substrate. The rear face of the facing table is formed with a series of elongate ribs and grooves, and the front face of the substrate is formed with a series of elongate ribs and grooves which interengage the grooves and ribs respectively in the facing table. The ribs and grooves on each surface include ribs which are spaced from adjacent grooves so that the part ofthe surface which extends from the bottom of a groove to the apex ofthe adjacent rib is non-linear and discontinuous. The discontinuity between each rib and groove may be an intervening surface portion which is flat, inclined, curved or otherwise shaped. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 10/56 (2006.01); E21B 10/573 (2006.01)
CPC (source: EP)
E21B 10/5735 (2013.01)
Citation (search report)
- [A] GB 2283772 A 19950517 - CAMCO DRILLING GROUP LTD [GB]
- [A] EP 0133386 A2 19850220 - MEGADIAMOND IND INC [US]
- [A] GB 2270493 A 19940316 - GEN ELECTRIC [US]
- [A] EP 0733777 A2 19960925 - CAMCO DRILLING GROUP LTD [GB]
- [AD] US 5120327 A 19920609 - DENNIS MAHLON D [US]
- [AD] US 4784023 A 19881115 - DENNIS MAHLON D [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 0878602 A2 19981118; EP 0878602 A3 19990825; GB 2325481 A 19981125; GB 2325481 B 20011212; GB 9709861 D0 19970709; GB 9810215 D0 19980708; ZA 984058 B 19981125
DOCDB simple family (application)
EP 98303775 A 19980514; GB 9709861 A 19970516; GB 9810215 A 19980514; ZA 984058 A 19980514