EP 0446765 B1 19950426 - Drill bit cutting array having discontinuities therein.
Title (en)
Drill bit cutting array having discontinuities therein.
Title (de)
Schneidanordnung mit Unterbrechungen für Bohrmeissel.
Title (fr)
Rangée découpe avec discontinuités pour trépan de forage.
Publication
Application
Priority
US 49004190 A 19900306
Abstract (en)
[origin: EP0446765A1] The present invention comprises a cutting structure for earth boring drill bits and a bit including at least one such structure comprising a substantially planar array (16) of cutting elements arranged in substantially contiguous mutual proximity, the array incorporating at least one discontinuity (28) therein dividing it into a plurality of sub-arrays. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 10/48 (2006.01); E21B 10/54 (2006.01)
CPC (source: EP)
E21B 10/485 (2013.01); E21B 10/54 (2013.01)
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0446765 A1 19910918; EP 0446765 B1 19950426; AU 640749 B2 19930902; AU 7261791 A 19910912; CA 2037480 A1 19910907; DE 69109160 D1 19950601; DE 69109160 T2 19950831; NO 910866 D0 19910305; NO 910866 L 19910909
DOCDB simple family (application)
EP 91103334 A 19910305; AU 7261791 A 19910305; CA 2037480 A 19910304; DE 69109160 T 19910305; NO 910866 A 19910305