Global Patent Index - EP 1052367 A2

EP 1052367 A2 2000-11-15 - 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

EP 1052367 A2 (EN)

Application

EP 00303645 A

Priority

GB 9911139 A

Abstract (en)

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 (main, further and additional classification)

E21B 10/56

IPC 8 full level (invention and additional information)

E21B 10/56 (2006.01); E21B 10/567 (2006.01); E21B 10/573 (2006.01)

CPC (invention and additional information)

E21B 10/5673 (2013.01); E21B 10/5735 (2013.01)

Designated contracting state (EPC)

BE DE FR IE

EPO simple patent family

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

INPADOC legal status


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