EP 0312487 B1 19930929 - EARTH BORING DRILL BIT WITH MATRIX DISPLACING MATERIAL
Title (en)
EARTH BORING DRILL BIT WITH MATRIX DISPLACING MATERIAL
Publication
Application
Priority
US 10794587 A 19871013
Abstract (en)
[origin: EP0312487A1] A rotary drill bit for drilling earth formations is provided and includes a bit shank, a hard metal matrix (14) secured to a blank (10) and cutting elements (21, 22) on the exterior face thereof. The matrix includes a displacement material (D) having a different composition than the matrix material within the matrix. The displacement material is preferably less expensive than the matrix material and also has different material properties. The resulting bit may be custom-engineered for toughness, ductility, and impact resistance.
IPC 1-7
IPC 8 full level
B22F 7/06 (2006.01); E21B 10/46 (2006.01)
CPC (source: EP)
B22F 7/06 (2013.01); E21B 10/46 (2013.01)
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0312487 A1 19890419; EP 0312487 B1 19930929; CA 1311234 C 19921208; DE 3884548 D1 19931104; DE 3884548 T2 19940428
DOCDB simple family (application)
EP 88710036 A 19881012; CA 579888 A 19881012; DE 3884548 T 19881012