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    • 56. 发明授权
    • Methods of forming earth-boring rotary drill bits
    • 形成钻孔旋转钻头的方法
    • US07802495B2
    • 2010-09-28
    • US11271153
    • 2005-11-10
    • James A. OxfordJimmy W. EasonRedd H. SmithJohn H. StevensNicholas J. Lyons
    • James A. OxfordJimmy W. EasonRedd H. SmithJohn H. StevensNicholas J. Lyons
    • B21K5/04E21B10/54
    • E21B10/00B22F7/062B22F7/08B22F2003/245B22F2005/001B22F2005/002B22F2998/10C22C29/08E21B10/62B22F3/1021B22F3/162
    • Methods of forming earth-boring rotary drill bits include providing a bit body, providing a shank that is configured for attachment to a drill string, and attaching the shank to the bit body. Providing a bit body includes providing a green powder component having a first region having a first composition and a second region having a second, different composition, and at least partially sintering the green powder component. Other methods include providing a powder mixture, pressing the powder mixture to form a green component, and sintering the green component to a final density. A shank is provided that includes an aperture, and a feature is machined in a surface of the bit body. The aperture is aligned with the feature, and a retaining member is inserted through the aperture. An earth-boring bit includes a bit body comprising a particle-matrix composite material including a plurality of hard particles dispersed throughout a matrix material. A shank is attached to the bit body using a retaining member.
    • 形成钻孔旋转钻头的方法包括提供钻头体,提供构造成用于附接到钻柱的柄,以及将柄连接到钻头体上。 提供有点体包括提供具有第一组分的第一区域和具有第二不同组成的第二区域并且至少部分地烧结绿色粉末组分的绿色粉末组分。 其他方法包括提供粉末混合物,挤压粉末混合物以形成绿色组分,并将绿色组分烧结至最终密度。 提供了一种柄,其包括孔,并且特征被加工在钻头体的表面中。 孔与该特征对准,并且保持构件插入穿过该孔。 一种钻孔钻头包括一个包括一颗粒基复合材料的钻头体,该复合材料包括分散在基体材料中的多个硬颗粒。 使用保持构件将柄连接到钻头体上。
    • 59. 发明申请
    • METHODS OF FORMING EARTH-BORING TOOLS INCLUDING SINTERBONDED COMPONENTS AND TOOLS FORMED BY SUCH METHODS
    • 形成接地工具的方法,包括通过这种方法形成的烧结构件和工具
    • US20090301789A1
    • 2009-12-10
    • US12136703
    • 2008-06-10
    • Redd H. SmithNicholas J. Lyons
    • Redd H. SmithNicholas J. Lyons
    • E21B10/00B22F7/00
    • B24D3/007B22F3/10B22F3/1017B22F3/16B22F7/06B22F7/062B22F2005/002B22F2999/00B24D3/06B24D3/20B24D18/0009E21B10/00E21B10/42E21B10/54E21B10/55E21B10/602B22F2207/17
    • Methods of forming earth-boring rotary drill bits by forming and joining two less than fully sintered components, by forming and joining a first fully sintered component with a first shrink rate and forming a second less than fully sintered component with a second sinter-shrink rate greater that that of the first shrink rate of the first fully sintered component, by forming and joining a first less than fully sintered component with a first sinter-shrink rate and by forming and joining at least a second less than fully sintered component with a second sinter-shrink rate less than the first sinter-shrink rate. The methods include co-sintering a first less than fully sintered component and a second less than fully sintered component to a desired final density to form at least a portion of an earth-boring rotary drill bit which may either cause the first less than fully sintered component and the second less than fully sintered component to join or may cause one of the first less than fully sintered component and the second less than fully sintered component to shrink around and at least partially capture the other less than fully sintered component. Earth-boring rotary drill bits are formed using such methods.
    • 通过形成和接合两个小于完全烧结的部件来形成钻孔旋转钻头的方法,通过以第一收缩率形成和接合第一完全烧结的部件并形成具有第二烧结收缩率的第二小于完全烧结的部件 通过以第一烧结收缩率形成和接合第一少于完全烧结的部件并且通过形成和接合至少第二小于完全烧结的部件与第二烧结收缩速率的第二小于完全烧结部件的第一收缩率, 烧结收缩率小于第一次烧结收缩率。 所述方法包括将第一少于完全烧结的部件和第二小于完全烧结的部件共烧结至所需的最终密度,以形成至少一部分钻地旋转钻头,其可能导致第一小于完全烧结 并且第二小于完全烧结的部件连接或者可以导致第一小于完全烧结的部件中的一个,而第二个小于完全烧结的部件之一收缩并且至少部分地捕获另一个小于完全烧结的部件。 使用这种方法形成钻孔旋转钻头。