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1.发明授权
公开(公告)号：US5839526A
公开(公告)日：1998-11-24
申请号：US833418
申请日：1997-04-04
摘要： A steel tooth bit includes one or more rolling cone cutters having a generally conical surface, a heel surface, and preferably a transition surface therebetween. A row of gage cutter elements are secured to the cone cutter on the transition surface and have cutting surfaces that cut to full gage. A first inner row of off-gage steel teeth is positioned on the conical surface of the cone cutter so that the gage-facing cutting surfaces of the teeth are close to gage, but are preferably off-gage a distance D at a knee that is formed on the gage facing surface. Distance D is strategically selected such that the gage and off-gage cutter elements cooperatively cut the corner of the borehole. The lower most portion of the gage facing surface of these steel teeth are off gage a distance D' which is greater than D so as to bring the cutting tip of the teeth off gage to prevent undesired wear and rounding off of the tip of the cutter element. The upper most portion of the gage-facing surface is also preferably off gage a distance D" that is greater than D so as to optimize the surface area on the gage facing surface that is in contact with the borehole corner.
摘要翻译： 钢齿钻头包括一个或多个具有大致圆锥形表面的滚动锥形切割器，后跟表面，并且优选地在其之间形成过渡表面。 一排量具切割器元件固定在过渡表面上的锥形切割器上，并具有切割成满量程的切割表面。 第一排内角钢齿的齿定位在锥形切割器的锥形表面上，使得齿的面向切口的表面接近规格，但优选在膝盖处为距离D， 形成在面向表面的表面上。 距离D有策略地选择，使得量规和离开切割元件协同地切割钻孔的角。 这些钢齿的面向表面的最下面的部分是远离D的距离D'，以使得齿的切割尖端脱离规格，以防止不期望的磨损和切割刀尖的四舍五入 元件。 面向表面的表面的最大部分还优选地离开计量器，其距离D“大于D，以便优化与钻孔角接触的面向表面的表面上的表面积。
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公开(公告)号：US5868213A
公开(公告)日：1999-02-09
申请号：US833334
申请日：1997-04-04
摘要： A steel tooth, particularly suited for use in a rolling cone bit, includes a root region, a cutting tip spaced from the root region and a gage facing surface therebetween. The gage facing surface includes a knee, and is configured such that the cutting tip is maintained at a position off the gage curve. So positioned, the cutting tip is freed from having to perform any substantial cutting duty in the corner on the borehole corner, and instead may be configured and optimized for bottom hole cutting duty. The knee on the gage facing surface is configured and positioned so as to serve primarily to cut the borehole wall. It is preferred that the knee be positioned off gage, but that it be closer to the gage curve than the cutting tip.
摘要翻译： 特别适用于滚动锥形钻头的钢齿包括根部区域，与根部区域间隔开的切割尖端以及与其之间的面向表面的表面。 面向面的表面包括膝部，并且被构造成使得切割尖端保持在距离曲线曲线的位置。 如此定位，切割尖端不需要在钻孔角落的角落执行任何实质的切割任务，而是可以配置和优化底孔切割任务。 面向表面的表面上的膝盖被构造和定位，以便主要用于切割钻孔壁。 优选的是，膝盖定位在规格上，但是它比切割尖端更接近计量曲线。
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3.发明授权
公开(公告)号：US5351770A
公开(公告)日：1994-10-04
申请号：US78123
申请日：1993-06-15
IPC分类号： E21B10/16 , E21B10/52 , E21B10/56 , E21B10/567
CPC分类号： E21B10/5673 , E21B10/16 , E21B10/52
摘要： A rotary cone rock bit for drilling boreholes in an earthen formation is disclosed. One or more rotary cones are rotatively retained on a journal bearing connected to the rock bit. These rotary cones form a circumferential heel row with extended ultra hard shaped cutters spaced within the heel row. Each of the shaped cutters form a cutting surface that extends above the heel row or is angled with respect to the formation to maintain the cutters in compression while the cutters shear a borehole wall. The shaped cutters serve to maintain the borehole diameter.
摘要翻译： 公开了一种用于在土层中钻孔的旋转锥形钻头。 一个或多个旋转锥体旋转地保持在连接到岩石钻头的轴颈轴承上。 这些旋转锥体形成具有在脚后跟行间隔开的延伸的超硬质切割器的圆周跟部行。 每个成形切割器形成一个切割表面，该切割表面在跟部行上方延伸，或相对于地层成角度，以在切割器剪切钻孔壁时保持切割器处于压缩状态。 成形刀具用于维持钻孔直径。
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公开(公告)号：US08205692B2
公开(公告)日：2012-06-26
申请号：US11858359
申请日：2007-09-20
摘要： A drill bit for cutting a borehole comprises a bit body. In addition, the drill bit comprises a rolling cone cutter mounted on the bit body and adapted for rotation about a cone axis. Further, the drill bit comprises at least one insert having a base portion secured in the rolling cone cutter and a cutting portion extending therefrom. The cutting portion includes a pair of flanking surfaces that taper towards one another to form an elongate chisel crest including a first crest end, a second crest end, and an apex positioned therebetween. A transverse radius of curvature at the first crest end is less than a transverse radius of curvature at the apex, and a transverse radius of curvature at the second crest end is less than the transverse radius of curvature at the apex.
摘要翻译： 用于切割钻孔的钻头包括钻头体。 此外，钻头包括安装在钻头体上并适于围绕锥体轴线旋转的滚动锥切割器。 此外，钻头包括至少一个插入件，其具有固定在滚动锥形切割器中的基部和从其延伸的切割部。 切割部分包括一对相对于彼此成锥形的侧面表面，以形成细长的凿孔，其包括第一顶端，第二顶端和位于其间的顶点。 在第一顶端处的横向曲率半径小于顶点处的横向曲率半径，并且在第二顶端处的横向曲率半径小于顶点处的横向曲率半径。
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公开(公告)号：US20080156543A1
公开(公告)日：2008-07-03
申请号：US11858359
申请日：2007-09-20
摘要： A drill bit for cutting a borehole comprises a bit body. In addition, the drill bit comprises a rolling cone cutter mounted on the bit body and adapted for rotation about a cone axis. Further, the drill bit comprises at least one insert having a base portion secured in the rolling cone cutter and a cutting portion extending therefrom. The cutting portion includes a pair of flanking surfaces that taper towards one another to form an elongate chisel crest including a first crest end, a second crest end, and an apex positioned therebetween. A transverse radius of curvature at the first crest end is less than a transverse radius of curvature at the apex, and a transverse radius of curvature at the second crest end is less than the transverse radius of curvature at the apex.
摘要翻译： 用于切割钻孔的钻头包括钻头体。 此外，钻头包括安装在钻头体上并适于围绕锥体轴线旋转的滚动锥切割器。 此外，钻头包括至少一个插入件，其具有固定在滚动锥形切割器中的基部和从其延伸的切割部。 切割部分包括一对相对于彼此成锥形的侧面表面，以形成细长的凿孔，其包括第一顶端，第二顶端和位于其间的顶点。 在第一顶端处的横向曲率半径小于顶点处的横向曲率半径，并且在第二顶端处的横向曲率半径小于顶点处的横向曲率半径。
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公开(公告)号：US5421424A
公开(公告)日：1995-06-06
申请号：US257592
申请日：1994-06-09
摘要： A chisel type insert is disclosed having a contoured surface in which the vertical lines located on the surface are bowed outwardly in a convex manner thereby eliminating blend radii from the cutting tip and the high stress concentrations associated therewith.
摘要翻译： 公开了一种凿型插入件，其具有轮廓表面，其中位于表面上的垂直线以凸形的方式向外弯曲，从而消除了来自切割尖端的混合半径以及与其相关联的高应力集中。
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公开(公告)号：US5915486A
公开(公告)日：1999-06-29
申请号：US833366
申请日：1997-04-04
摘要： A cutter element having a substantially flat wear face and leading compression and trailing tension zones, wherein the leading compression zone is sharper than the trailing tension zone. Sharpness is defined as either a smaller inside angle at the intersection of a pair of planes or as a smaller radius of curvature. The cutter element of the present invention experiences reduced stress on its trailing portion in the direction of cutting movement and therefore is less subject to extreme impact damage and cyclic fatigue. The present invention can be applied with particular advantage to heel row cutters, but can also be applied to cutters in other rows that primarily ream the borehole wall and cooperatively cut the borehole corner. The present cutter element can be constructed so as to have either a positive or negative rake angle at its leading compression zone, or to have any of a variety of shapes, depending on the characteristics of the formation in which it is to be used.
摘要翻译： 刀片元件具有基本平坦的磨损面和引导的压缩和牵引张力区域，其中前导压缩区域比拖拉区域更尖锐。 清晰度被定义为在一对平面的交点处较小的内角或较小的曲率半径。 本发明的切割元件在切割方向上的尾部受到较小的应力，因此受到极大的冲击损伤和循环疲劳的影响。 本发明可以特别有利于后跟行切割机，但是也可以应用于其它行中的切割器，其主要是钻孔壁并协同切割钻孔角。 本刀片元件可以被构造为在其前导压缩区域具有正或负前角，或者根据要使用的地层的特性，具有各种形状。
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公开(公告)号：US08991523B2
公开(公告)日：2015-03-31
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： E21B10/08 , E21B10/633 , B23P15/28
CPC分类号： E21B10/633 , B23P15/28
摘要： A drill bit includes 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. 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： 钻头包括钻头体，从钻头体径向延伸的多个刀片，设置在多个刀片上的多个切割器凹槽，设置在其中一个切割器凹穴中的至少一个滚刀，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 。 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。
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公开(公告)号：US20090065261A1
公开(公告)日：2009-03-12
申请号：US12116119
申请日：2008-05-06
IPC分类号： E21B10/16
CPC分类号： E21B10/5673 , E21B10/16 , E21B10/52
摘要： A rolling cone drill bit is provided that has gage inserts on the first row from the bit axis to cut to full gage diameter that have a cutting portion enhanced with a layer of super abrasive material. The gage cutting surface has a center axis that is canted to be more normal to the gave curve such that its point of contact at gage is away from the thinner portion of the layer of super abrasive material.
摘要翻译： 提供了一种滚动锥钻头，其具有从钻头轴线到第一排的量具插入件，以切割成全量规直径，其具有通过一层超级研磨材料增强的切割部分。 计量切割表面具有倾斜的中心轴线，以使其与给定曲线更正交，使得其量具上的接触点远离超级研磨材料层的较薄部分。
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10.发明授权Single cone rock bit having inserts adapted to maintain hole gage during drilling 失效单锥岩石钻头具有适于在钻孔期间保持孔规的插入件公开(公告)号：US07401668B2
公开(公告)日：2008-07-22
申请号：US11501472
申请日：2006-08-09
IPC分类号： E21B10/16
CPC分类号： E21B10/52 , E21B10/08 , E21B17/1092
摘要： A roller cone drill bit is disclosed which includes a bit body adapted to be coupled to a drill string. A bearing journal depends from the bit body. A single roller cone is rotatably attached to the bearing journal. The roller cone has a plurality of inserts disposed at selected positions about the cone. The journal defines a rotation angle with respect to an axis of rotation of the bit such that the roller cone includes a wall contact zone and a bottom contact zone. At least one of the inserts disposed in the wall contact zone has an extension portion terminating in a substantially planar upper surface.
摘要翻译： 公开了一种滚子锥钻头，其包括适于联接到钻柱的钻头体。 轴承日志取决于位体。 单个滚子锥体可旋转地附接到轴承轴颈。 辊锥体具有多个插入件，其设置在围绕锥体的选定位置处。 轴颈限定相对于钻头的旋转轴线的旋转角度，使得滚子锥体包括壁接触区域和底部接触区域。 布置在壁接触区域中的插入件中的至少一个具有终止于基本平坦的上表面的延伸部分。
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