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1. 发明授权

US08100202B2 Fixed cutter bit with backup cutter elements on secondary blades 有权
标题翻译：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。

2. 发明申请

US20090145669A1 Drill Bit Cutting Structure and Methods to Maximize Depth-0f-Cut For Weight on Bit Applied 有权
标题翻译：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。

3. 发明授权

US07621348B2 Drag bits with dropping tendencies and methods for making the same 失效
标题翻译：拖动位与下降的倾向和方法使相同
公开(公告)号：US07621348B2
公开(公告)日：2009-11-24
申请号：US11866333
申请日：2007-10-02
申请人： Carl M. Hoffmaster , Michael G. Azar
发明人： Carl M. Hoffmaster , Michael G. Azar
IPC分类号： E21B10/43
CPC分类号： E21B10/43 , E21B7/10
摘要： A bit having improved dropping tendencies includes a first plurality of cutters in an active region and a second plurality of cutters in a passive region. The second plurality of cutters has unique radial positions with respect to the first plurality of cutters. The first and the second pluralities of cutters also have cutting tips that extend to the primary cutting profile of the bit. A third plurality of cutters is located in the passive region with cutting tips positioned recessed from the primary cutting profile. A forth plurality of cutters is positioned as back up cutters in the active, region and includes cutters positioned in radial locations such that they overlap, when viewed in rotated profile, with cutters in the third plurality of cutters. The fourth plurality of cutters has cutting tips positioned to extend to the primary cutting profile. The cutters on the bit are arranged such that an imbalance force vector exists on the bit when used to drill though earth formation.
摘要翻译：具有改进的下降趋势的位包括有源区域中的第一多个切割器和被动区域中的第二多个切割器。第二多个切割器相对于第一多个切割器具有独特的径向位置。第一和第二多个切割机还具有延伸到钻头的主切割轮廓的切割尖端。第三多个切割器位于被动区域中，切割尖端定位成从主切割轮廓凹进。第四多个切割器被定位为活动区域中的备份切割器，并且包括定位在径向位置的切割器，使得当在旋转轮廓中观察时，切割器与第三多个切割器中的切割器重叠。第四多个切割器具有定位成延伸到主切割轮廓的切割尖端。钻头上的刀具被布置成使得当用于钻地层钻孔时，钻头上存在不平衡力矢量。

4. 发明申请

US20090266619A1 Fixed Cutter Bit With Backup Cutter Elements on Secondary Blades 有权
标题翻译：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。

5. 发明授权

US09016407B2 Drill bit cutting structure and methods to maximize depth-of-cut for weight on bit applied 有权
标题翻译：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。

6. 发明授权

US09347275B2 Fixed cutter drill bit with core fragmentation feature 有权
标题翻译：固定切割钻头，具有核心碎片特征
公开(公告)号：US09347275B2
公开(公告)日：2016-05-24
申请号：US13528518
申请日：2012-06-20
申请人： Michael G. Azar , Hemachandar Mada
发明人： Michael G. Azar , Hemachandar Mada
IPC分类号： E21B10/04 , E21B10/48
CPC分类号： E21B10/485 , E21B10/04
摘要： A drill bit has a plurality of blades that include a coring blade, a plurality of flow courses that include an evacuation slot disposed between the plurality of blades, and a conical insert disposed on or proximate a bit centerline of the drill bit. Coring blade includes a first cutting element disposed at a first radial position from the bit centerline. Also, coring blade includes a substantially vertical surface and an angled surface. During drilling, first cutting element cuts formation to generate a core sample fragment at bit centerline. Core sample fragment is then broken away from formation using angled surface or conical insert after core sample fragment reaches a certain length. Core sample fragment then exits drill bit via an evacuation slot, from where core sample fragment is transported via an annulus to the surface of formation for testing and analysis.
摘要翻译：钻头具有多个叶片，其包括取芯刀片，包括设置在所述多个刀片之间的抽空槽的多个流动路径以及设置在所述钻头的钻头中心线上或其附近的圆锥形刀片。取向刀片包括设置在距钻头中心线的第一径向位置处的第一切削元件。此外，取芯刀片包括基本垂直的表面和成角度的表面。在钻孔期间，第一切割元件切割形成以在位中心线处产生芯样品片段。然后在核心样品片段达到一定长度之后，使用角度表面或锥形插入物将核心样品片段从形成中断开。核心样品片段然后通过抽空槽离开钻头，其中核心样品片段通过环带传输到地层表面进行测试和分析。

7. 发明授权

US08567534B2 Thermally stable polycrystalline diamond cutting elements and bits incorporating the same 失效
标题翻译：耐热稳定的多晶金刚石切割元件和结合其的钻头
公开(公告)号：US08567534B2
公开(公告)日：2013-10-29
申请号：US13449243
申请日：2012-04-17
申请人： Youhe Zhang , Yuelin Shen , Madapusi K. Keshavan , Michael G. Azar
发明人： Youhe Zhang , Yuelin Shen , Madapusi K. Keshavan , Michael G. Azar
IPC分类号： E21B10/36
CPC分类号： E21B10/5676 , E21B10/5735
摘要： Cutting elements have substrates including end surfaces. TSP material layers extend over only a portion of the end surfaces or extend into the substrates below the end surfaces. Bits incorporate such cutting elements.
摘要翻译：切割元件具有包括端面的基板。 TSP材料层仅在端表面的一部分上延伸，或延伸到端面下方的基板中。位结合了这样的切割元件。

8. 发明申请

US20120024604A1 FIXED CUTTER DRILL BIT FOR ABRASIVE APPLICATIONS 审中-公开
标题翻译：固定切割机钻头用于磨料应用
公开(公告)号：US20120024604A1
公开(公告)日：2012-02-02
申请号：US13196627
申请日：2011-08-02
申请人： Carl Hoffmaster , Shelton W. Alsup , Michael G. Azar , Thomas W. Oldham , Stuart R. Oliver , Sidney J. Isnor
发明人： Carl Hoffmaster , Shelton W. Alsup , Michael G. Azar , Thomas W. Oldham , Stuart R. Oliver , Sidney J. Isnor
IPC分类号： E21B7/00 , E21B10/36
CPC分类号： E21B10/43 , E21B10/26 , E21B10/54 , E21B10/55 , E21B10/567 , E21B17/1092
摘要： The invention provides a fixed cutter drill bit for drilling through unconsolidated, highly abrasive formations. The bit includes a bit body having a cutting face and a side portion. The bit body comprising carbide matrix material. A plurality of blades azimuthally spaced about the cutting face and a plurality of cutters disposed along the blades. At least one gage pad is disposed along a side of the bit body and includes wear resistant gage elements formed of a material more wear resistant than the matrix material forming a portion of the gage pad. The wear resistant elements have a rounded surface and are embedded in gage pad material proximal a leading edge of the gage pad to provide a rounded wear-resistant edge or surface proximal the leading edge.
摘要翻译：本发明提供了一种固定的切割钻头，用于通过未固结的，高度磨蚀的地层进行钻孔。该钻头包括具有切割面和侧部的钻头体。钻头体包括碳化物基体材料。围绕切割面方位角间隔开的多个刀片和沿刀片设置的多个刀具。至少一个量具垫沿着钻头体的一侧设置，并且包括由比构成量具垫的一部分的基体材料更耐磨的材料形成的耐磨计量元件。耐磨元件具有圆形表面，并且嵌入到量规垫材料的接近垫圈垫的前缘的量规垫材料中，以提供靠近前缘的圆形耐磨边缘或表面。

9. 发明授权

US4981184A Diamond drag bit for soft formations 失效
标题翻译：钻石阻力位软地层
公开(公告)号：US4981184A
公开(公告)日：1991-01-01
申请号：US274169
申请日：1988-11-21
申请人： R. Helene Knowlton , Michael G. Azar
发明人： R. Helene Knowlton , Michael G. Azar
IPC分类号： E21B10/16 , E21B10/18 , E21B10/56 , E21B10/567 , E21B10/60
CPC分类号： E21B10/5673 , E21B10/43 , E21B10/60
摘要： A drag bit for soft formation is disclosed which consists of a new cutting mechanism. The drag bit face forms one or more pairs of radially disposed ridges separated by a valley whereby a leading ridge supports multiple rounded projections and the following ridge supports multiple positive rake angle cutters. The rounded projection elements move aside an elastic earth formation and the separated and trailing cutters clip off the dislodged formation to advance the bit in a borehole.

10. 发明授权

US09404312B2 Cutting structures for fixed cutter drill bit and other downhole cutting tools 有权
标题翻译：固定式切割钻头和其他井下切削刀具的切割结构
公开(公告)号：US09404312B2
公开(公告)日：2016-08-02
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： E21B10/26 , E21B10/62 , E21B10/43 , E21B10/46 , E21B10/54 , E21B10/55 , E21B10/567 , E21B10/42 , E21B10/56 , E21B10/627 , E21B10/633
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。

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