EP 0501447 A1 19920902 - Improved rock bit and compact inserts and method of manufacture.
Title (en)
Improved rock bit and compact inserts and method of manufacture.
Title (de)
Verbesserter Bohrmeissel, Schneideinsätze und Herstellungsmethode.
Title (fr)
Trépan de forage perfectionné et insertions compactes et procédé de fabrication.
Publication
Application
Priority
- US 66326691 A 19910301
- US 66344391 A 19910301
Abstract (en)
Apparatus and a method are shown for manufacturing a diamond filled compact (11, 23, 29, 31, 41, 43, 53, 55) of the type used as a cutting insert which is received in a cutting insert pocket in a drill bit face. Also shown is a fixed cutter earth boring drill bit (84) using the compact. The compact includes a hard metal jacket (13) having an open end and an open interior. The open interior is substantially filled with diamond (19). The diamond filled jacket is subjected to a temperature and a pressure sufficient to sinter the diamond and integrally form a diamond core within the hard metal jacket. The outer dimensions of the hard metal jacket are then reduced to a size selected to conform to a cutting insert pocket provided on the face of a drill bit. The compact is mounted over the cutting surfaces of the one-piece fixed cutter drill bit. <IMAGE>
IPC 1-7
IPC 8 full level
B22F 7/06 (2006.01); E21B 10/52 (2006.01); E21B 10/56 (2006.01); E21B 10/567 (2006.01)
CPC (source: EP)
B22F 7/06 (2013.01); E21B 10/52 (2013.01); E21B 10/56 (2013.01); E21B 10/5676 (2013.01)
Citation (search report)
[X] EP 0029535 A1 19810603 - GEN ELECTRIC [US]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 92103262 A 19920226