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21. 发明申请

US20060157279A1 Fixed-head bit with stabilizing features 有权
标题翻译：固定头位稳定功能
公开(公告)号：US20060157279A1
公开(公告)日：2006-07-20
申请号：US11037553
申请日：2005-01-18
申请人： Peter Cariveau , Bala Durairajan , Sujian Huang
发明人： Peter Cariveau , Bala Durairajan , Sujian Huang
IPC分类号： E21B7/00 , E21B10/42
CPC分类号： E21B10/43 , E21B10/54
摘要： A fixed-head drill bit includes a bit body having a plurality of cutting elements and at least one wear knuckle disposed on the bit body. Each cutting element includes a cutting surface defining a swept cutting profile when the bit is rotated about an axis. The at least one wear knuckle is positioned at least partially within and extending at least partially outside a selected one or more of the swept cutting profiles, allowing the fixed-head drill bit to wear into a more stable configuration.
摘要翻译：固定头钻头包括具有多个切割元件的钻头体和设置在钻头体上的至少一个磨损指节。每个切割元件包括当钻头围绕轴线旋转时限定扫掠切割轮廓的切割表面。所述至少一个磨损指关节至少部分地位于并且至少部分地延伸到所选择的一个或多个扫掠切割轮廓外部，从而允许固定头钻头磨损成更稳定的构型。

22. 发明申请

US20120234610A1 CUTTING STRUCTURES FOR FIXED CUTTER DRILL BIT AND OTHER DOWNHOLE CUTTING TOOLS 有权
标题翻译：固定切割钻头和其他切割工具的切割结构
公开(公告)号：US20120234610A1
公开(公告)日：2012-09-20
申请号：US13370862
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： E21B10/46
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 downhole cutting tool may include a tool body; a plurality of blades extending azimuthally from the tool body; and a plurality of cutting elements disposed on the plurality of blades, the plurality of cutting elements comprising: at least two conical cutting elements comprising a substrate and a diamond layer having a conical cutting end, wherein at least one of the at least two conical cutting elements has a positive back rake angle, and at least one of the at least two conical cutting elements has a negative back rake angle.
摘要翻译：井下切削工具可以包括工具主体; 多个叶片，其从工具体方向延伸; 以及多个切割元件，所述多个切割元件设置在所述多个刀片上，所述多个切割元件包括：至少两个锥形切割元件，包括基底和具有锥形切割端的金刚石层，其中所述至少两个锥形切割元件具有正的后倾角，并且至少两个锥形切割元件中的至少一个具有负的后倾角。

23. 发明申请

US20120205163A1 KERFING HYBRID DRILL BIT AND OTHER DOWNHOLE CUTTING TOOLS 有权
标题翻译： 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。

24. 发明授权

US08127863B2 Drill bit having enhanced stabilization features and method of use thereof 有权
标题翻译：钻头具有增强的稳定特征及其使用方法
公开(公告)号：US08127863B2
公开(公告)日：2012-03-06
申请号：US12330633
申请日：2008-12-09
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： E21B10/36 , E21B10/42 , E21B10/43
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。

25. 发明申请

US20100018780A1 PDC BIT HAVING SPLIT BLADES 审中-公开
标题翻译：具有分割刀片的PDC位
公开(公告)号：US20100018780A1
公开(公告)日：2010-01-28
申请号：US12507730
申请日：2009-07-22
申请人： Geoffrey M. Johnson , Carl M. Hoffmaster , Bala Durairajan , Michael George Azar
发明人： Geoffrey M. Johnson , Carl M. Hoffmaster , Bala Durairajan , Michael George Azar
IPC分类号： E21B10/43 , E21B10/42
CPC分类号： E21B10/55
摘要： A drill bit for drilling a borehole in a formation, the drill bit including a bit body having a bit face including a cone region, a nose region, a shoulder region, and a gage region, at least one disjointed blade disposed on the bit face, the disjointed blade including a first section beginning proximate a central axis of the bit and extending less than full gage, and a second section beginning a selected distance from the central axis and extending to full gage, and a plurality of cutting elements mounted on the at least one disjointed blade is disclosed.
摘要翻译：一种用于在地层中钻孔的钻头，所述钻头包括具有包括锥形区域，鼻部区域，肩部区域和计量区域的钻头面的钻头体，设置在钻头面上的至少一个不相交刀片，所述不相交的刀片包括从所述钻头的中心轴线附近开始并且延伸小于全量具的第一部分，以及从所述中心轴线开始延伸到全量具的选定距离的第二部分，以及安装在所述切割元件上的多个切割元件公开了至少一个不相交的叶片。

26. 发明申请

US20060167668A1 PDC drill bit with cutter design optimized with dynamic centerline analysis and having dynamic center line trajectory 审中-公开
标题翻译：具有刀具设计的PDC钻头，通过动态中心线分析进行优化，并具有动态中心线轨迹
公开(公告)号：US20060167668A1
公开(公告)日：2006-07-27
申请号：US11041910
申请日：2005-01-24
申请人： Peter Cariveau , Bala Durairajan , Sujian Huang
发明人： Peter Cariveau , Bala Durairajan , Sujian Huang
IPC分类号： G06G7/48
CPC分类号： E21B10/00
摘要： A method for designing a fixed cutter drill bit includes simulating the fixed cutter drill bit drilling in an earth formation, determining a dynamic centerline trajectory of the drill bit, and adjusting at least one design parameter based upon the graphical display of at least the dynamic centerline trajectory. To improve performance, the method can include graphically displaying the dynamic centerline trajectory and/or repeating the simulating, determining, displaying and adjusting to change a simulated performance of the fixed cutter drill bit. A drill bit design may be selected and a drill bit may be made according to the design resulting from the method of designing.
摘要翻译：一种用于设计固定切割钻头的方法包括模拟地层中的固定切割钻头钻孔，确定钻头的动态中心线轨迹，以及基于至少动态中心线的图形显示来调整至少一个设计参数弹道。为了提高性能，该方法可以包括图形地显示动态中心线轨迹和/或重复模拟，确定，显示和调整以改变固定切割钻头的模拟性能。可以选择钻头设计，并且可以根据由设计方法产生的设计来制造钻头。

27. 发明授权

US08783386B2 Stabilizing members for fixed cutter drill bit 失效
标题翻译：固定刀具钻头稳定件
公开(公告)号：US08783386B2
公开(公告)日：2014-07-22
申请号：US12828887
申请日：2010-07-01
申请人： Bala Durairajan , Dwayne P Terracina
发明人： Bala Durairajan , Dwayne P Terracina
IPC分类号： E21B10/43
CPC分类号： E21B10/43 , E21B10/55
摘要： A drill bit for drilling a borehole in an earthen formation. In an embodiment, the bit comprises a first blade having a cutter-supporting surface. In addition, the bit comprises a plurality of primary cutter elements with cutting faces mounted to the cutter-supporting surface. The cutting profiles of the cutting faces define an outermost cutting profile Po in rotated profile view. Further, the bit comprises a stabilizing member having an end distal the cutter-supporting surface. The end includes a tip. The tip is offset from the outermost cutting profile Po in rotated profile view.
摘要翻译：用于在土层中钻孔的钻头。在一个实施例中，钻头包括具有切割器支撑表面的第一刀片。此外，该钻头包括多个主切割器元件，其切割面安装在刀具支撑表面上。切割面的切割轮廓在旋转轮廓视图中限定最外切割轮廓Po。此外，该钻头包括稳定件，其具有远离切割器支撑表面的一端。最后包括一个提示。尖端在旋转轮廓视图中偏离最外切割轮廓Po。

28. 发明授权

US08689908B2 Drill bit having enhanced stabilization features and method of use thereof 有权
标题翻译：钻头具有增强的稳定特征及其使用方法
公开(公告)号：US08689908B2
公开(公告)日：2014-04-08
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： E21B10/42
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。

29. 发明授权

US08061453B2 Drill bit with asymmetric gage pad configuration 有权
标题翻译：钻头采用不对称量具垫配置
公开(公告)号：US08061453B2
公开(公告)日：2011-11-22
申请号：US11753268
申请日：2007-05-24
申请人： Peter T. Cariveau , Bala Durairajan
发明人： Peter T. Cariveau , Bala Durairajan
IPC分类号： E21B10/00
CPC分类号： E21B17/1092
摘要： A drill bit for drilling a borehole in earthen formations. In an embodiment, the bit comprises a bit body having a bit axis and a bit face. In addition, the bit comprises a pin end extending from the bit body opposite the bit face. Further, the bit comprises a plurality of gage pads extending from the bit body, wherein each gage pad includes a radially outer gage-facing surface. The gage-facing surfaces of the plurality of gage pads define a gage pad circumference that is centered relative to a gage pad axis, the gage pad axis being substantially parallel to the bit axis and offset from the bit axis.
摘要翻译：用于在土层中钻孔的钻头。在一个实施例中，该位包括具有位轴和位面的位体。此外，该钻头包括从钻头体相对于钻头面延伸的销端。此外，钻头包括从钻头体延伸的多个计量垫，其中每个计量垫包括径向外表面的表面。多个量具垫的面向表面的表面限定了相对于量规垫轴线居中的量具垫周长，量规垫轴线基本上平行于钻头轴线并且偏离钻头轴线。

30. 发明申请

US20090283334A1 IMPREGNATED DRILL BIT 有权
标题翻译：被打破的钻头
公开(公告)号：US20090283334A1
公开(公告)日：2009-11-19
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
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 having a varying width along at least a portion of a rib height is disclosed.
摘要翻译：一种钻头，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由其间的多个通道分开的多个凸肋; 公开了沿着肋高度的至少一部分具有变化宽度的多个肋中的至少一个。

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