EP 2899360 B1 20180110 - Method for reducing intermetallic compounds in matrix bit bondline
Title (en)
Method for reducing intermetallic compounds in matrix bit bondline
Title (de)
Verfahren zur Reduzierung intermetallischer Verbindungen in einer Matrixbit-Klebeschicht
Title (fr)
Procédé de réduction de composés inter-métalliques de collage de bits dans une matrice
Publication
Application
Priority
US 201414162501 A 20140123
Abstract (en)
[origin: EP2899360A2] An apparatus and method for manufacturing a downhole tool that reduces failures occurring along a bondline between a cemented matrix coupled around a blank. The cemented matrix material is formed from a tungsten carbide powder, a shoulder powder, and a binder material, wherein at least one of the tungsten carbide powder or the shoulder powder is absent of any free tungsten. The blank, which optionally may be coated, is substantially cylindrically shaped and defines a channel extending from a top portion and through a bottom portion of the blank. The absence of free tungsten from at least one of the tungsten carbide powder or the shoulder powder reduces the reaction with iron from the blank, thereby allowing the control and reduction of intermetallic compounds thickness within the bondline.
IPC 8 full level
E21B 10/00 (2006.01); B22D 19/06 (2006.01); C22C 29/08 (2006.01)
CPC (source: EP)
B22D 19/06 (2013.01); B22F 5/10 (2013.01); B22F 7/062 (2013.01); C22C 29/08 (2013.01); E21B 10/00 (2013.01); B22F 2005/001 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2899360 A2 20150729; EP 2899360 A3 20160427; EP 2899360 B1 20180110; CA 2878039 A1 20150723; RU 2015101974 A 20160820; RU 2015101974 A3 20180605
DOCDB simple family (application)
EP 15152253 A 20150123; CA 2878039 A 20150115; RU 2015101974 A 20150122