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42 条记录 (耗时 0.022 秒)

    Feature to eliminate shale packing/shale evacuation channel
    1.
    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
    2.
    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。

    Drag bit with utility blades
    3.
    发明授权
    Drag bit with utility blades 有权
    用实用刀片拖动位

    公开(公告)号：US08869919B2

    公开(公告)日：2014-10-28

    申请号：US13089948

    申请日：2011-04-19

    申请人： Yuelin Shen ,  Youhe Zhang ,  Bala Durairajan ,  Charles H. S. Douglas, III

    发明人： Yuelin Shen ,  Youhe Zhang ,  Bala Durairajan ,  Charles H. S. Douglas, III

    IPC分类号： E21B17/10 ,  E21B10/00 ,  E21B10/42 ,  E21B12/02 ,  E21B10/43 ,  E21B10/60

    CPC分类号： E21B10/42 ,  E21B10/43 ,  E21B10/60 ,  E21B12/02

    摘要： A drill bit may have a bit body, a plurality of cutting blades extending radially from the bit body and having cutting elements disposed thereon, the plurality of cutting blades forming a cutting blade gage pad diameter configured to contact a formation, and a plurality of raised volumes of material extending from the bit body and devoid of cutting elements, the plurality of raised volumes of material forming a gage pad diameter configured to contact the formation, wherein the plurality of cutting blades and the plurality of raised volume of material are circumferentially spaced having fluid courses that extend therebetween.

    摘要翻译： 钻头可以具有钻头体，多个切割刀片从钻头体径向延伸并且具有设置在其上的切割元件，所述多个切割刀片形成构造成接触地层的切割刀片量规垫直径，以及多个凸起 从钻头体延伸并且没有切割元件的多个材料的体积，多个凸起体积的材料形成构造成接触地层的量具垫直径，其中多个切割刀片和多个凸起体积的材料沿周向间隔开， 在它们之间延伸的流体流道。

    Cutters for fixed cutter bits
    4.
    发明授权
    Cutters for fixed cutter bits 有权
    固定刀头刀片

    公开(公告)号：US08833492B2

    公开(公告)日：2014-09-16

    申请号：US12247959

    申请日：2008-10-08

    申请人： Bala Durairajan ,  Carl M. Hoffmaster

    发明人： Bala Durairajan ,  Carl M. Hoffmaster

    IPC分类号： E21B10/567 ,  E21B10/55

    CPC分类号： E21B10/567 ,  E21B10/42 ,  E21B10/55 ,  E21B10/5673

    摘要： A PDC cutter includes a body formed from a substrate material, an ultrahard layer disposed on the body, and a concave cutting face perpendicular to an axis of the body. A PDC cutter includes a body formed from a substrate material, an ultrahard layer disposed on the body, and a non-planar cutting face perpendicular to an axis of the body, the cutting face including a circumferential concave portion, and an inner protrusion portion.

    摘要翻译： PDC切割器包括由基底材料形成的主体，设置在主体上的超硬层以及垂直于主体的轴线的凹形切割面。 PDC切割器包括由基板材料形成的主体，设置在主体上的超硬层，以及垂直于主体的轴线的非平面切割面，切割面包括周向凹部和内部突出部。

    Drill bit cutting structure and methods to maximize depth-of-cut for weight on bit applied
    7.
    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。

    Cutter geometry for high ROP applications
    8.
    发明授权
    Cutter geometry for high ROP applications 有权
    高ROP应用的刀具几何

    公开(公告)号：US08783387B2

    公开(公告)日：2014-07-22

    申请号：US12205778

    申请日：2008-09-05

    申请人： Bala Durairajan ,  Carl M. Hoffmaster

    发明人： Bala Durairajan ,  Carl M. Hoffmaster

    IPC分类号： E21B10/36

    CPC分类号： E21B10/5673

    摘要： A polycrystalline diamond compact (“PDC”)cutter includes a cylindrical body formed from a substrate material, an ultrahard layer disposed on the cylindrical body, and a cutting face perpendicular to an axis of the cylindrical body, wherein the cutting face includes two or more lobes and wherein the radius of at least one lobe is between 50 and 90 percent of the radius of the cylindrical body. A PDC cutter includes a substrate, and a cutting face perpendicular to an axis of the substrate, wherein the cross-section of the cutting face comprises multiple lobes, and the cross-section of the substrate is substantially circular.

    摘要翻译： 多晶金刚石切割器（“PDC”）切割器包括由基底材料形成的圆柱体，设置在圆柱体上的超硬层和垂直于圆柱体的轴线的切割面，其中切割面包括两个或更多个 并且其中至少一个凸角的半径在圆柱体的半径的50％至90％之间。 PDC切割器包括基板和垂直于基板的轴线的切割面，其中切割面的横截面包括多个凸角，并且基板的横截面基本上为圆形。

    Drill Bit Having Enhanced Stabilization Features and Method of Use Thereof
    9.
    发明申请
    Drill Bit Having Enhanced Stabilization Features and Method of Use Thereof 有权
    具有增强稳定特性的钻头及其使用方法

    公开(公告)号：US20120186879A1

    公开(公告)日：2012-07-26

    申请号：US13412242

    申请日：2012-03-05

    申请人： Bala Durairajan ,  Carl M. Hoffmaster ,  Rolando Descarpontriez Arteaga

    发明人： Bala Durairajan ,  Carl M. Hoffmaster ,  Rolando Descarpontriez Arteaga

    IPC分类号： E21B7/00 ,  E21B10/54

    CPC分类号： E21B10/42 ,  E21B10/55

    摘要： A drill bit for drilling a borehole in earthen formations comprising 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, the primary blade including a cutter-supporting surface that defines a blade profile in rotated profile view extending from the bit axis to an outer radius of the bit body. The blade profile is continuously contoured and includes a plurality of concave regions. Further, the drill bit comprises a plurality of cutter elements mounted to the cutter-supporting surface of the primary blade. Each cutter element on the primary blade has a forward-facing cutting face with a cutting edge adapted to penetrate and shear the earthen formation.

    摘要翻译： 一种用于在土层中钻孔的钻头，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，主刀片包括切割器支撑表面，刀片支撑表面限定了从钻头轴线延伸到钻头体的外半径的旋转轮廓图中的刀片轮廓。 刀片轮廓连续成型并包括多个凹入区域。 此外，钻头包括安装到主叶片的切割器支撑表面的多个切割器元件。 主叶片上的每个切割元件具有前向切割面，其具有适于穿透和剪切土层的切割边缘。

    ROLLING CUTTER ASSEMBLED DIRECTLY TO THE BIT POCKETS
    10.
    发明申请
    ROLLING CUTTER ASSEMBLED DIRECTLY TO THE BIT POCKETS 有权
    滚动切割机直接组装到位口袋

    公开(公告)号：US20110297454A1

    公开(公告)日：2011-12-08

    申请号：US13152626

    申请日：2011-06-03

    申请人： Yuelin Shen ,  Youhe Zhang ,  Yuri Burhan ,  Michael A. Siracki ,  Mahavir Nagaraj ,  Bala Durairajan ,  Scott D. McDonough ,  Peter Thomas Cariveau

    发明人： Yuelin Shen ,  Youhe Zhang ,  Yuri Burhan ,  Michael A. Siracki ,  Mahavir Nagaraj ,  Bala Durairajan ,  Scott D. McDonough ,  Peter Thomas Cariveau

    IPC分类号： E21B10/36 ,  B23P15/28

    CPC分类号： E21B10/633 ,  B23P15/28

    摘要： A drill bit having a bit body, a plurality of blades extending radially from the bit body, a plurality of cutter pockets disposed on the plurality of blades, at least one rolling cutter disposed in one of the cutter pockets, wherein each rolling cutter has a substrate, a cutting face, a cutting edge, and a side surface, and at least one blocker positioned adjacent to each of the at least one rolling cutters on a leading face of the blade, wherein each blocker has a retention end and an attachment end is disclosed. The retention end of each blocker is positioned adjacent to a portion of the cutting face of each rolling cutter to retain the rolling cutter in the cutter pocket and the attachment end is attached to a portion of the blade.

    摘要翻译： 一种具有钻头体的钻头，从钻头体径向延伸的多个刀片，设置在所述多个刀片上的多个切割器凹槽，设置在所述切割器凹穴之一中的至少一个滚切刀具，其中每个滚切刀具有 基板，切割面，切割边缘和侧表面;以及至少一个阻挡件，其邻近于所述刀片的前表面上的所述至少一个滚动切割器中的每一个定位，其中每个阻挡件具有保持端和附接端 被披露。 每个阻塞器的保持端定位成与每个滚动切割器的切割面的一部分相邻，以将滚动切割器保持在切割器凹槽中，并且附接端附接到叶片的一部分。