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    Bit leg outer surface hardfacing on earth-boring bit
    1.
    发明授权
    Bit leg outer surface hardfacing on earth-boring bit 有权
    位腿外表面硬化地面钻孔

    公开(公告)号：US07484577B2

    公开(公告)日：2009-02-03

    申请号：US11709439

    申请日：2007-02-22

    申请人： James L. Overstreet ,  Robert J. Buske ,  John F. Bradford, III ,  Caleb A. Rickabaugh

    发明人： James L. Overstreet ,  Robert J. Buske ,  John F. Bradford, III ,  Caleb A. Rickabaugh

    IPC分类号： E21B10/50

    CPC分类号： E21B10/08

    摘要： An earth-boring bit has bit legs having hardfacing covering the majority of the outer surface. The hardfacing may have gaps at an area surrounding the ball plug and an area around a fixture dimple. The hardfacing may be multi-layer, with the layers differing in composition. Recesses may be located at the leading and trailing edges of the supporting metal so as to provide a thicker area of hardfacing at these corners. The supporting metal of the outer surface of the bit leg may also have an upper cylindrical section and a lower tapered section. The hardfacing has a constant outer diameter but will taper in thickness in the lower tapered section. The thickness of the hardfacing may also vary in a circumferential direction with a greater thickness over at least one of the corners.

    摘要翻译： 钻孔钻头具有覆盖大部分外表面的耐磨面。 表面硬化在球塞周围的区域和夹具凹坑周围的区域可能具有间隙。 表面硬化可以是多层，组合不同。 凹部可以位于支撑金属的前缘和后缘，以便在这些拐角处提供较厚的表面硬化面积。 钻头腿的外表面的支撑金属也可以具有上圆柱形部分和下锥形部分。 表面硬化具有恒定的外径，但在下锥形部分中的厚度将逐渐变细。 表面硬化的厚度也可以在圆周方向上变化，并且在至少一个拐角上具有更大的厚度。

    Earth boring drill bits made from a low-carbon, high-molybdenum alloy
    4.
    发明授权
    Earth boring drill bits made from a low-carbon, high-molybdenum alloy 有权
    地球钻头由低碳高钼合金制成

    公开(公告)号：US07905301B2

    公开(公告)日：2011-03-15

    申请号：US12166954

    申请日：2008-07-02

    申请人： Carmel Z. El Hakam ,  Eric C. Sullivan ,  John F. Bradford, III ,  Don Q. Nguyen

    发明人： Carmel Z. El Hakam ,  Eric C. Sullivan ,  John F. Bradford, III ,  Don Q. Nguyen

    IPC分类号： E21B10/46

    CPC分类号： C22C38/04 ,  C21D9/22 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44

    摘要： An earth boring bit formed from an alloy comprising a low carbon content and high molybdenum content is disclosed herein. The molybdenum content is greater than about 0.8% to about 1.15% by weight of the alloy. The carbon content may range up to about 0.16% by weight of the alloy. The alloy may further comprise alloy further comprises manganese, phosphorus, sulfur, silicon, nickel, chromium, copper, aluminum, vanadium, and calcium; with the balance being iron. The alloy experiences a relatively flattened hardenability curve and low martinsite formation.

    摘要翻译： 本文公开了由包含低碳含量和高钼含量的合金形成的钻孔钻头。 钼含量大于合金重量的约0.8％至约1.15％。 碳含量可以高达合金重量的约0.16％。 合金还可以包含锰，磷，硫，硅，镍，铬，铜，铝，钒和钙; 平衡是铁。 该合金经历相对扁平的淬透性曲线和低的马氏体组成。

    Earth Boring Drill Bits Made From A Low-Carbon, High-Molybdenum Alloy
    5.
    发明申请
    Earth Boring Drill Bits Made From A Low-Carbon, High-Molybdenum Alloy 有权
    低碳，高钼合金地球钻孔钻头

    公开(公告)号：US20090008154A1

    公开(公告)日：2009-01-08

    申请号：US12166954

    申请日：2008-07-02

    申请人： Carmel Z. El Hakam ,  Eric Sullivan ,  John F. Bradford, III ,  Don Q. Nguyen

    发明人： Carmel Z. El Hakam ,  Eric Sullivan ,  John F. Bradford, III ,  Don Q. Nguyen

    IPC分类号： E21B10/00 ,  C22C1/10

    CPC分类号： C22C38/04 ,  C21D9/22 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44

    摘要： An earth boring bit formed from an alloy comprising a low carbon content and high molybdenum content is disclosed herein. The molybdenum content is greater than about 0.8% to about 1.15% by weight of the alloy. The carbon content may range up to about 0.16% by weight of the alloy. The alloy may further comprise alloy further comprises manganese, phosphorus, sulfur, silicon, nickel, chromium, copper, aluminum, vanadium, and calcium; with the balance being iron. The alloy experiences a relatively flattened hardenability curve and low martinsite formation.

    摘要翻译： 本文公开了由包含低碳含量和高钼含量的合金形成的钻孔钻头。 钼含量大于合金重量的约0.8％至约1.15％。 碳含量可以高达合金重量的约0.16％。 合金还可以包含锰，磷，硫，硅，镍，铬，铜，铝，钒和钙; 平衡是铁。 该合金经历相对扁平的淬透性曲线和低的马氏体组成。