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    KERFING HYBRID DRILL BIT AND OTHER DOWNHOLE CUTTING TOOLS
    4.
    发明申请
    KERFING HYBRID DRILL BIT AND OTHER DOWNHOLE CUTTING TOOLS 有权
    KERFING混合钻头和其他卧式切割工具

    公开(公告)号：US20120205163A1

    公开(公告)日：2012-08-16

    申请号：US13370734

    申请日：2012-02-10

    申请人： Michael G. Azar ,  Bala Durairajan ,  Madapusi K. Keshavan

    发明人： Michael G. Azar ,  Bala Durairajan ,  Madapusi K. Keshavan

    IPC分类号： E21B10/36

    CPC分类号： E21B10/62 ,  E21B10/26 ,  E21B10/42 ,  E21B10/43 ,  E21B10/46 ,  E21B10/54 ,  E21B10/55 ,  E21B10/56 ,  E21B10/567 ,  E21B10/5673 ,  E21B10/627 ,  E21B10/633 ,  E21B2010/425 ,  E21B2010/545 ,  E21B2010/561 ,  E21B2010/562 ,  E21B2010/622 ,  E21B2010/624

    摘要： A drill bit for drilling a borehole in earth formations may include a bit body having a bit axis and a bit face; a plurality of blades extending radially along the bit face; and a plurality of cutting elements disposed on the plurality of blades, the plurality of cutting elements comprising: at least one cutter comprising a substrate and a diamond table having a substantially planar cutting face; and at least two conical cutting elements comprising a substrate and a diamond layer having a conical cutting end, wherein in a rotated view of the plurality of cutting elements into a single plane, the at least one cutter is located a radial position from the bit axis that is intermediate the radial positions of the at least two conical cutting elements.

    摘要翻译： 用于在地层中钻孔的钻头可以包括具有钻头轴线和钻头面的钻头体; 沿着钻头面径向延伸的多个刀片; 以及设置在所述多个刀片上的多个切割元件，所述多个切割元件包括：至少一个切割器，包括基底和具有基本上平面的切割面的金刚石台; 以及至少两个锥形切割元件，其包括基底和具有锥形切割端的金刚石层，其中在所述多个切割元件的旋转视图中成为单个平面，所述至少一个切割器位于距钻头轴线的径向位置 其位于所述至少两个锥形切割元件的径向位置的中间。

    Drill bit cutting structure and methods to maximize depth-of-cut for weight on bit applied
    5.
    发明授权
    Drill bit cutting structure and methods to maximize depth-of-cut for weight on bit applied 有权
    钻头切割结构和方法，以最大限度地提高加工深度

    公开(公告)号：US09016407B2

    公开(公告)日：2015-04-28

    申请号：US12329163

    申请日：2008-12-05

    申请人： Bala Durairajan ,  Carl M. Hoffmaster ,  Michael G. Azar

    发明人： Bala Durairajan ,  Carl M. Hoffmaster ,  Michael G. Azar

    IPC分类号： E21B10/00 ,  E21B10/58 ,  E21B10/43 ,  E21B10/55

    CPC分类号： E21B10/43 ,  E21B10/55

    摘要： A drill bit for drilling a borehole in earthen formations comprises a bit body including a cone region, a shoulder region, and a gage region. In addition the bit comprises a first primary blade and a second primary blade. Further, the bit comprises a plurality of primary cutter elements mounted to the first primary blade in different radial positions. Still further, the bit comprises a plurality of primary cutter elements mounted to the second primary blade in different radial positions. Moreover, a first primary cutter element of the plurality of primary cutter elements on the first primary blade and a first primary cutter element of the plurality of primary cutter elements on the second primary blade are each positioned in the cone region and are redundant. The shoulder region has a total cutter redundancy percentage that is less than a total cutter redundancy percentage in the cone region.

    摘要翻译： 用于在土层中钻孔的钻头包括具有锥体区域，肩部区域和计量区域的钻头体。 此外，钻头包括第一主叶片和第二主叶片。 此外，钻头包括以不同的径向位置安装到第一主叶片的多个主切割器元件。 此外，该钻头包括以不同的径向位置安装到第二主叶片的多个主切割器元件。 此外，第一主叶片上的多个主切割元件的第一主切割元件和第二主叶片上的多个主切割元件的第一主切割元件分别位于锥形区域中并且是多余的。 肩部区域的总切割器冗余百分比小于锥形区域中的总切割器冗余百分比。

    Fixed Cutter Bit With Backup Cutter Elements on Secondary Blades
    6.
    发明申请
    Fixed Cutter Bit With Backup Cutter Elements on Secondary Blades 有权
    固定切割刀头与辅助刀片上的备用刀具元件

    公开(公告)号：US20090266619A1

    公开(公告)日：2009-10-29

    申请号：US12416202

    申请日：2009-04-01

    申请人： Bala Durairajan ,  Carl M. Hoffmaster ,  Michael G. Azar ,  Kurt T. Bush

    发明人： Bala Durairajan ,  Carl M. Hoffmaster ,  Michael G. Azar ,  Kurt T. Bush

    IPC分类号： E21B10/43

    CPC分类号： E21B17/1092 ,  E21B10/43

    摘要： In an embodiment, a drill bit for drilling a borehole comprises a bit body having a bit axis and a bit face. In addition, the drill bit comprises a primary blade extending radially along the bit face. Further, the drill bit comprises a plurality of primary cutter elements mounted to the primary blade. The primary blade is free of backup cutter elements. Still further, the drill bit comprises a secondary blade extending radially along the bit face. Moreover, the drill bit comprises a plurality of primary cutter elements mounted to the secondary blade. In addition, the drill bit comprises a first plurality of backup cutter elements mounted to the secondary blade in a first backup row that trails the primary row. Further, the drill bit comprises a second plurality of backup cutter elements mounted to the secondary blade in a second backup row that trails the first backup row.

    摘要翻译： 在一个实施例中，用于钻孔的钻头包括具有钻头轴线和钻头面的钻头体。 此外，钻头包括沿钻头面径向延伸的主刀片。 此外，钻头包括安装到主叶片的多个主切割器元件。 主刀片没有备用刀具元件。 此外，钻头包括沿着钻头面径向延伸的次级刀片。 此外，钻头包括安装到次级叶片的多个主切割器元件。 此外，钻头包括在第一备用行中安装到次级叶片上的第一多个备用切割器元件，该第一备用行跟踪主列。 此外，钻头包括在第二备用行中安装到次级叶片上的第二多个备用切割器元件，该第二备用行跟踪第一备用行。

    Fixed cutter bit with backup cutter elements on secondary blades
    7.
    发明授权
    Fixed cutter bit with backup cutter elements on secondary blades 有权
    固定切割刀头，备用刀片上的备刀刀片

    公开(公告)号：US08100202B2

    公开(公告)日：2012-01-24

    申请号：US12416202

    申请日：2009-04-01

    申请人： Bala Durairajan ,  Carl M. Hoffmaster ,  Michael G. Azar ,  Kurt T. Bush

    发明人： Bala Durairajan ,  Carl M. Hoffmaster ,  Michael G. Azar ,  Kurt T. Bush

    IPC分类号： E21B10/26

    CPC分类号： E21B17/1092 ,  E21B10/43

    摘要： In an embodiment, a drill bit for drilling a borehole comprises a bit body having a bit axis and a bit face. In addition, the drill bit comprises a primary blade extending radially along the bit face. Further, the drill bit comprises a plurality of primary cutter elements mounted to the primary blade. The primary blade is free of backup cutter elements. Still further, the drill bit comprises a secondary blade extending radially along the bit face. Moreover, the drill bit comprises a plurality of primary cutter elements mounted to the secondary blade. In addition, the drill bit comprises a first plurality of backup cutter elements mounted to the secondary blade in a first backup row that trails the primary row. Further, the drill bit comprises a second plurality of backup cutter elements mounted to the secondary blade in a second backup row that trails the first backup row.

    摘要翻译： 在一个实施例中，用于钻孔的钻头包括具有钻头轴线和钻头面的钻头体。 此外，钻头包括沿钻头面径向延伸的主刀片。 此外，钻头包括安装到主叶片的多个主切割器元件。 主刀片没有备用刀具元件。 此外，钻头包括沿着钻头面径向延伸的次级刀片。 此外，钻头包括安装到次级叶片的多个主切割器元件。 此外，钻头包括在第一备用行中安装到次级叶片上的第一多个备用切割器元件，该第一备用行跟踪主列。 此外，钻头包括在第二备用行中安装到次级叶片上的第二多个备用切割器元件，该第二备用行跟踪第一备用行。

    Drill Bit Cutting Structure and Methods to Maximize Depth-0f-Cut For Weight on Bit Applied
    8.
    发明申请
    Drill Bit Cutting Structure and Methods to Maximize Depth-0f-Cut For Weight on Bit Applied 有权
    钻头切割结构和方法，最大限度地减少施加的重量

    公开(公告)号：US20090145669A1

    公开(公告)日：2009-06-11

    申请号：US12329163

    申请日：2008-12-05

    申请人： Bala Durairajan ,  Carl M. Hoffmaster ,  Michael G. Azar

    发明人： Bala Durairajan ,  Carl M. Hoffmaster ,  Michael G. Azar

    IPC分类号： E21B10/00 ,  E21B10/58

    CPC分类号： E21B10/43 ,  E21B10/55

    摘要： A drill bit for drilling a borehole in earthen formations comprises a bit body including a cone region, a shoulder region, and a gage region. In addition the bit comprises a first primary blade and a second primary blade. Further, the bit comprises a plurality of primary cutter elements mounted to the first primary blade in different radial positions. Still further, the bit comprises a plurality of primary cutter elements mounted to the second primary blade in different radial positions. Moreover, a first primary cutter element of the plurality of primary cutter elements on the first primary blade and a first primary cutter element of the plurality of primary cutter elements on the second primary blade are each positioned in the cone region and are redundant. The shoulder region has a total cutter redundancy percentage that is less than a total cutter redundancy percentage in the cone region.

    摘要翻译： 用于在土层中钻孔的钻头包括具有锥体区域，肩部区域和计量区域的钻头体。 此外，钻头包括第一主叶片和第二主叶片。 此外，钻头包括以不同的径向位置安装到第一主叶片的多个主切割器元件。 此外，该钻头包括以不同的径向位置安装到第二主叶片的多个主切割器元件。 此外，第一主叶片上的多个主切割元件的第一主切割元件和第二主叶片上的多个主切割元件的第一主切割元件分别位于锥形区域中并且是多余的。 肩部区域的总切割器冗余百分比小于锥形区域中的总切割器冗余百分比。

    Feature to eliminate shale packing/shale evacuation channel
    9.
    发明授权
    Feature to eliminate shale packing/shale evacuation channel 有权

    公开(公告)号：US09617794B2

    公开(公告)日：2017-04-11

    申请号：US13531007

    申请日：2012-06-22

    申请人： Bala Durairajan ,  Rahul Bijai ,  Sandeep Tammineni ,  William Moore ,  Ehren Long

    发明人： Bala Durairajan ,  Rahul Bijai ,  Sandeep Tammineni ,  William Moore ,  Ehren Long

    IPC分类号： E21B10/60 ,  E21B10/43

    CPC分类号： E21B10/602 ,  E21B10/43

    摘要： A drill bit having a bit body with a longitudinal axis extending therethrough and a plurality of blades extending from the bit body is disclosed. Each blade has an outer face and at least one side wall. The drill bit has at least one junk slot, wherein each junk slot is defined by the bit body surface and the side walls of adjacent blades. At least one nozzle bore is formed in the bit body, wherein each nozzle bore has an intersecting surface between the bit body surface of a junk slot and an inner surface of the nozzle bore. At least one formation evacuation channel extends through the intersecting surface of at least one of the nozzle bores, wherein each formation evacuation channel has a base surface, and wherein the formation evacuation channel extends partially around the circumference of the nozzle bore.

    Impregnated drill bit
    10.
    发明授权
    Impregnated drill bit 有权
    浸渍钻头

    公开(公告)号：US09103170B2

    公开(公告)日：2015-08-11

    申请号：US12122467

    申请日：2008-05-16

    申请人： Bala Durairajan ,  Jonan Fulenchek ,  Gregory T. Lockwood

    发明人： Bala Durairajan ,  Jonan Fulenchek ,  Gregory T. Lockwood

    IPC分类号： E21B10/00 ,  E21B10/46 ,  E21B10/54 ,  E21B10/60

    CPC分类号： E21B10/46 ,  E21B10/54 ,  E21B10/602

    摘要： A drill bit that includes a body having a lower end face for engaging a rock formation. The end face having a plurality of raised ribs extending from the face of the bit body and separated by a plurality of channels therebetween At least one of the plurality of ribs has a varying width along at least a portion of a rib height.

    摘要翻译： 一种钻头，其包括具有用于接合岩层的下端面的主体。 所述端面具有从所述钻头体的所述表面延伸并且由多个通道隔开的多个凸肋。所述多个肋中的至少一个沿肋高度的至少一部分具有变化的宽度。