公开(公告)号：US07997358B2

公开(公告)日：2011-08-16

申请号：US12582212

申请日：2009-10-20

Applicant: Saul N Izaguirre ,  Thomas W. Oldham ,  Kumar T Kembaiyan ,  Gary Chunn ,  Anthony Griffo ,  Robert Denton ,  Brian A White

Inventor： Saul N Izaguirre ,  Thomas W. Oldham ,  Kumar T Kembaiyan ,  Gary Chunn ,  Anthony Griffo ,  Robert Denton ,  Brian A White

IPC: E21B10/46

CPC classification number: E21B10/567 ,  B22F7/06 ,  B22F7/062 ,  B22F2005/001

Abstract: A bit body formed of a mixture of matrix material and superabrasive powder and including pockets lined with superabrasive-free matrix material, and a method for forming the same, are provided. The pockets are shaped to receive cutting elements therein. The superabrasive-free matrix material enhances braze strength when a cutting element is brazed to surfaces of the pocket. The method for forming the drill bit body includes providing a mold and displacements. The displacements are coated with a mixture of superabrasive free matrix-material and an organic binder. The mold is packed with a mixture of matrix material and superabrasive powder and the arrangement heated to form a solid drill bit body. When the solid bit body is removed from the mold, pockets are formed by the displacements in the bit body and are lined with the layer of superabrasive-free matrix material. The superabrasive material may be diamond, polycrystalline cubic boron nitride, SiC or TiB2 in exemplary embodiments.

Abstract translation: 由基体材料和超级磨料粉末的混合物形成的一个体，并且包括衬有超无磨料基质材料的口袋及其形成方法。 口袋被成形为在其中容纳切割元件。 当将切割元件钎焊到袋的表面时，超无磨料基质材料增强了钎焊强度。 用于形成钻头体的方法包括提供模具和位移。 位移用超磨料自由基质材料和有机粘合剂的混合物涂覆。 模具中填充有基体材料和超级磨料粉末的混合物，并将该装置加热形成固体钻头体。 当固体钻头体从模具中取出时，通过钻头体中的位移形成凹坑，并且衬有超级无磨料基体材料层。 在示例性实施例中，超研磨材料可以是金刚石，多晶立方氮化硼，SiC或TiB 2。

公开(公告)号：US07389834B1

公开(公告)日：2008-06-24

申请号：US10952502

申请日：2004-09-28

Applicant: Kumar T Kembaiyan

Inventor： Kumar T Kembaiyan

IPC: E21B10/567

CPC classification number: E21B10/56 ,  B23K35/3006

Abstract: An improved braze alloy is microalloyed to include about 0.0005 wt % to about 0.5 wt % of at least one aggressively surface acting element selected from tellurium (Te), selenium (Se), antimony (Sb), bismuth (Bi), and gallium (Ga), or any combination thereof. The braze alloys may include at least about 30% by weight of at least one base metal selected from the group of silver (Ag), copper (Cu), gold (Au), nickel (Ni), or aluminum (Al). In one example, a silver braze alloy suitable for brazing a cutter to a drill bit body is microalloyed to improve a characteristic of the braze material.

Abstract translation: 改进的钎焊合金被微合金化以包括选自碲（Te），硒（Se），锑（Sb），铋（Bi）和镓（碲） Ga）或其任何组合。 钎焊合金可包括至少约30重量％的选自银（Ag），铜（Cu），金（Au），镍（Ni）或铝（Al）的至少一种贱金属。 在一个实例中，适合于将切割器钎焊到钻头体上的银钎焊合金被微合金化以改善钎焊材料的特性。