公开(公告)号：US09359824B2

公开(公告)日：2016-06-07

申请号：US14162501

申请日：2014-01-23

申请人： Varel Europe S.A.S.

发明人： Gary M. Thigpen ,  Federico Bellin ,  Marvin Windsor Amundsen ,  Olivier Ther ,  Alfazazi Dourfaye ,  Bruno Cuillier De Maindreville ,  Williams Gomez

IPC分类号： E21B10/54 ,  E21B10/42 ,  B22D19/06 ,  B22F7/08 ,  C22C29/08 ,  E21B10/00 ,  B22F5/00

CPC分类号： E21B10/42 ,  B22D19/06 ,  B22F7/08 ,  B22F2005/001 ,  C22C29/08 ,  E21B10/00

摘要： 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.

摘要翻译： 一种用于制造井下工具的装置和方法，其减少沿着围绕坯料耦合的胶结基体之间的粘合线发生的故障。 胶结基体材料由碳化钨粉末，肩状粉末和粘合剂材料形成，其中至少一种碳化钨粉末或肩状粉末不含任何游离钨。 任选地可以涂覆的坯件基本上是圆柱形的并且限定了从顶部延伸并穿过坯料的底部的通道。 来自碳化钨粉末或肩部粉末中的至少一种的游离钨的存在减少了来自坯料的铁的反应，从而允许控制和还原粘合层内的金属间化合物厚度。

公开(公告)号：US20170173717A1

公开(公告)日：2017-06-22

申请号：US15352763

申请日：2016-11-16

申请人： Varel Europe S.A.S.

发明人： Olivier Ther ,  Alfazazi Dourfaye ,  Bruno Cuillier ,  Williams Gomez ,  Yves Cazalas ,  Gilles Gallego

IPC分类号： B23K1/00 ,  E21B10/54 ,  B22D23/06 ,  B22D29/00 ,  B22D19/06 ,  B22C9/22

CPC分类号： B23K1/0008 ,  B22C9/22 ,  B22D19/06 ,  B22D19/14 ,  B22D23/06 ,  B22D27/04 ,  B22D29/00 ,  B22F3/004 ,  B22F3/26 ,  B22F7/08 ,  B23K2101/002 ,  B23K2103/52 ,  C22C1/1036 ,  C22C29/005 ,  C22C29/08 ,  E21B10/54

摘要： A method for manufacturing a matrix drill bit includes: placing a metallic blank within a casting assembly including a mold having an inner surface formed into a negative shape of facial features of the drill bit; loading powder into an annulus formed between the blank and the mold, the powder including at least one of: ceramic powder and cermet powder; placing a binder alloy into the casting assembly over the blank and the mold; protecting the binder alloy from oxidation; inserting the casting assembly, blank, powder, and binder alloy into a furnace; operating the furnace to heat the protected binder alloy to an infiltration temperature between solidus and liquidus temperatures thereof, thereby infiltrating the powder with the binder alloy and forming a bit body; removing the bit body from the furnace; and after removal, attaching cutters to blades of the bit body.