EP 0246789 A2 19871125 - Cutter for a rotary drill bit, rotary drill bit with such a cutter, and method of manufacturing such a cutter.
Title (en)
Cutter for a rotary drill bit, rotary drill bit with such a cutter, and method of manufacturing such a cutter.
Title (de)
Schneidelement für einen Drehbohrmeissel, Drehbohrmeissel mit derartigem Schneidelement und dessen Herstellungsverfahren.
Title (fr)
Elément de coupe pour un trépan rotatif, trépan rotatif avec un tel élément, et procédé de fabrication de cet élément.
Publication
Application
Priority
GB 8612012 A 19860516
Abstract (en)
A cutter, for use in a rotary drill bit, comprises a number of thermally stable polycrystalline diamond elements 21 at least partly embedded in a slug 20 of cemented tungsten carbide, the cemented tungsten carbide having been formed by hot pressing with cobalt. The thermally stable polycrystalline diamond may be of the kind in which the interstices between the diamond particles are substantially filled with silicon carbide, or of the kind in which metallic interstitial components have been leached out, and each element has been coated with a protective material, such as nickel.
IPC 1-7
IPC 8 full level
B22F 7/06 (2006.01); E21B 10/56 (2006.01); E21B 10/567 (2006.01)
CPC (source: EP)
B22F 7/06 (2013.01); E21B 10/5676 (2013.01)
Designated contracting state (EPC)
BE CH DE FR LI NL SE
DOCDB simple family (publication)
EP 0246789 A2 19871125; EP 0246789 A3 19881214; GB 2190412 A 19871118; GB 8612012 D0 19860625; GB 8710876 D0 19870610
DOCDB simple family (application)
EP 87304144 A 19870511; GB 8612012 A 19860516; GB 8710876 A 19870508