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公开(公告)号：US06390210B1
公开(公告)日：2002-05-21
申请号：US08630517
申请日：1996-04-10
申请人： Gary Ray Portwood , Gary Edward Garcia , James Carl Minikus , Per Ivar Nese , Dennis Cisneros , Chris Edward Cawthorne
发明人： Gary Ray Portwood , Gary Edward Garcia , James Carl Minikus , Per Ivar Nese , Dennis Cisneros , Chris Edward Cawthorne
IPC分类号： E21B1016
CPC分类号： E21B10/5673 , E21B10/16 , E21B10/52
摘要： A rolling cone bit includes at least one cone cutter having a gage row of cutter elements and a first inner row of near but off-gage cutter elements that are positioned so as to divide the sidewall and bottom hole cutting duty so as to enhance bit durability, maintain borehole diameter and improve ROP. The off-gage distance of the first inner row of cutter elements is defined for various bit sizes to optimize the division of cutting duty. The distance that the first inner row of cutter elements are off-gage may be constant for all the cones on the bit or may be varied among the various cones to balance the durability and wear characteristics on all the cones of the bit.
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2.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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3.发明授权Rolling cone bit with enhancements in cutter element placement and materials to optimize borehole corner cutting duty 失效滚动锥头加工刀具元件放置和材料，以优化钻孔角切削功能
公开(公告)号：US5833020A
公开(公告)日：1998-11-10
申请号：US667758
申请日：1996-06-21
申请人： Gary Ray Portwood , Gary Edward Garcia , James Carl Minikus , Per Ivar Nese , Dennis Cisneros , Chris Edward Cawthorne
发明人： Gary Ray Portwood , Gary Edward Garcia , James Carl Minikus , Per Ivar Nese , Dennis Cisneros , Chris Edward Cawthorne
IPC分类号： E21B10/16 , E21B10/52 , E21B10/56 , E21B10/567 , E21B10/50
CPC分类号： E21B10/5673 , E21B10/16 , E21B10/52
摘要： A rolling cone bit includes a cone cutter having a pair of adjacent rows of cutter elements that are positioned so as to divide the sidewall and bottom hole cutting duty. The wear resistance, hardness and toughness of the cutter elements in the adjacent rows are optimized depending upon the type of cutting the respective rows perform. In most applications, the cutter elements experiencing more sidewall cutting will have cutting surfaces that are more wear resistant or harder than the cutting surfaces of cutter elements in rows experiencing more bottom hole duty. Likewise, the cutter elements exposed to more bottom hole duty will generally be tougher than those experiencing substantial sidewall cutting. The material enhancements include varying the grades of tungsten carbide used in the cutter elements and by selectively employing layers of super abrasives, such as PCD or PCBN. The cutter elements may be either inserts or steel teeth.
摘要翻译： 滚动锥头包括具有一对相邻的切割器元件排的锥形切割器，该切割器元件被定位成将侧壁和底部孔切割功能分开。 相邻行中的切割元件的耐磨性，硬度和韧性根据各行的切割类型进行优化。 在大多数应用中，经历更多侧壁切割的切割器元件将具有比经历更多底坑功能的行中的切割器元件的切割表面更耐磨或更硬的切割表面。 同样地，暴露于更多的底孔负荷的切割元件通常比那些经历大量侧壁切割的切割元件更坚硬。 材料增强包括改变切削元件中使用的碳化钨等级，并且选择性地使用超级磨料层，例如PCD或PCBN。 切割元件可以是插入件或钢齿。
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公开(公告)号：US20070261890A1
公开(公告)日：2007-11-15
申请号：US11382510
申请日：2006-05-10
申请人： Dennis Cisneros
发明人： Dennis Cisneros
IPC分类号： E21B10/08
CPC分类号： E21B10/43
摘要： A drill bit for drilling a borehole in earthen formations. In an embodiment, the bit comprises a bit body having a bit face comprising a cone region, a shoulder region, and a gage region. In addition, the bit comprises at least one primary blade disposed on the bit face, wherein the at least one primary blade extends into the cone region. Further, the bit comprises a plurality of primary cutter elements mounted on the at least one primary blade in the cone region. Still further, the bit comprises a plurality of backup cutter elements mounted on the at least one primary blade in the cone region, wherein the at least one primary blade has a cone backup cutter density and a shoulder backup cutter density, and wherein the cone backup cutter density of the at least one primary blade is greater than the shoulder backup cutter density of the at least one primary blade.
摘要翻译： 用于在土层中钻孔的钻头。 在一个实施例中，钻头包括具有钻头面的钻头体，其包括锥形区域，肩部区域和计量区域。 此外，钻头包括设置在钻头面上的至少一个主刀片，其中至少一个主刀片延伸到锥形区域中。 此外，钻头包括安装在锥形区域中的至少一个主叶片上的多个主切割器元件。 此外，该钻头包括安装在锥形区域中的至少一个主叶片上的多个备用切割器元件，其中该至少一个主叶片具有锥形备份切割器密度和肩部备份切割器密度，并且其中锥形备份 至少一个主叶片的切割器密度大于至少一个主叶片的肩部备用切割器密度。
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公开(公告)号：US06533051B1
公开(公告)日：2003-03-18
申请号：US09390717
申请日：1999-09-07
IPC分类号： E21B1022
摘要： A roller cone drill bit includes a bit body adapted to be rotated about a longitudinal axis. At least one leg which terminates in a shirttail portion depends from the bit body. The shirttail portion defines a first end face having a first circumferential groove thereon. The first circumferential groove has a radius equal to the radius of a tip of the shirttail portion. A journal is cantilevered from the leg, and a roller cone is rotatably mounted on the journal. The roller cone has a second end face adjacent to the first end face. A second circumferential groove is formed on the second end face.
摘要翻译： 辊锥钻头包括适于围绕纵向轴线旋转的钻头体。 终止于衬衫尾部的至少一条腿取决于钻头体。 衬衫部分限定其上具有第一周向槽的第一端面。 第一周向槽的半径等于衬衫尾部的前端的半径。 轴颈悬臂，轴颈可旋转地安装在轴颈上。 滚子锥体具有与第一端面相邻的第二端面。 在第二端面上形成第二圆周槽。
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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：US5853055A
公开(公告)日：1998-12-29
申请号：US671517
申请日：1996-06-27
申请人： Michael A. Siracki , Per I. Nese , Alan W. Lockstedt , Dennis Cisneros , Michael S. Oliver , Gary R. Portwood
发明人： Michael A. Siracki , Per I. Nese , Alan W. Lockstedt , Dennis Cisneros , Michael S. Oliver , Gary R. Portwood
摘要： A rotary cone bit for drilling bore holes in earth formations whose body has a thread pin end and a dome end from which extend three legs. A cutter cone is rotatably mounted to each leg and is radially oriented about the bit's central axis. Each cutter cone has a gage row of cutting elements extending from the cone surface nearest the mouth and a nose row extending nearest the cone's apex. A center jet for emitting fluid or mud is located on the dome. The jet has a converging nozzle with an exit orifice which extends below a predefined horizontal plane intersected by the cones or cutting elements. The exit orifice has a constant diameter for a length at least equal to its diameter for reducing the diffusion of the fluid or mud flow emitted. Fluid or mud emitted from the center jet travels substantially uninterrupted within a cylindrical space between the cones which is not invaded by any cutting element. This reduced diffusion substantially uninterrupted fluid flow strikes the bore hole bottom with maximum impact energy for enhanced removal of earth formation cuttings.
摘要翻译： 一个用于在地层中钻孔的旋转锥形钻头，其主体具有螺纹针端和从其延伸三条腿的圆顶端。 切割锥体可旋转地安装到每个支腿上并且围绕钻头的中心轴线径向定向。 每个切割锥体具有从最接近嘴部的锥形表面延伸的切割元件的行列，以及最靠近锥体顶点延伸的鼻列。 用于喷射流体或泥浆的中心喷射器位于圆顶上。 喷射器具有会聚喷嘴，其具有出口孔，该出口孔延伸到与锥体或切割元件相交的预定水平面下方。 出口孔具有至少等于其直径的长度的恒定直径，用于减少发射的流体或泥浆流的扩散。 从中心射流发射的流体或泥浆在不被任何切割元件侵入的锥体之间的圆柱形空间内基本上不间断地行进。 这种减少的扩散基本上不间断的流体流动以最大的冲击能量撞击钻孔底部，以增强地球切屑的去除。
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公开(公告)号：US20080302575A1
公开(公告)日：2008-12-11
申请号：US11760933
申请日：2007-06-11
IPC分类号： E21B10/00
CPC分类号： E21B10/43
摘要： A drill bit for drilling a borehole comprises a bit body having a bit face. In addition, the drill bit comprises a plurality of primary blades. Further, the drill bit comprises a plurality of primary cutter elements mounted to each primary blade and at least one backup cutter element mounted to each primary blade. Still further, the drill bit comprises a plurality of secondary blades. Moreover, the drill bit comprises a plurality of primary cutter elements mounted to each secondary blade. The ratio of the total number of backup cutter elements mounted to the plurality of primary blades to the total number of backup cutter elements mounted to the plurality of secondary blades is greater than 2.0. Each backup cutter element on each primary blade has substantially the same radial position as one of the primary cutter elements on the same primary blade.
摘要翻译： 用于钻孔的钻头包括具有钻头面的钻头体。 另外，钻头包括多个主叶片。 此外，钻头包括安装到每个主叶片的多个主切割器元件和安装到每个主叶片的至少一个支撑切割器元件。 此外，钻头包括多个次级叶片。 此外，钻头包括安装到每个次级叶片的多个主切割器元件。 安装到多个主叶片的备用切割器元件的总数与安装到多个辅助叶片的备用切割器元件的总数之比大于2.0。 每个主叶片上的每个支撑切割器元件具有与相同主叶片上的主切割器元件之一基本相同的径向位置。
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公开(公告)号：US06510909B2
公开(公告)日：2003-01-28
申请号：US10105748
申请日：2002-03-25
申请人： Gary Ray Portwood , Gary Edward Garcia , James Carl Minikus , Per Ivar Nese , Dennis Cisneros , Chris Edward Cawthorne
发明人： Gary Ray Portwood , Gary Edward Garcia , James Carl Minikus , Per Ivar Nese , Dennis Cisneros , Chris Edward Cawthorne
IPC分类号： E21B1016
CPC分类号： E21B10/5673 , E21B10/16 , E21B10/52
摘要： A rolling cone bit includes at least one cone cutter having a gage row of cutter elements and a first inner row of near but off-gage cutter elements that are positioned so as to divide the sidewall and bottom hole cutting duty so as to enhance bit durability, maintain borehole diameter and improve ROP. The off-gage distance of the first inner row of cutter elements is defined for various bit sizes to optimize the division of cutting duty. The distance that the first inner row of cutter elements are off-gage may be constant for all the cones on the bit or may be varied among the various cones to balance the durability and wear characteristics on all the cones of the bit.
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10.发明授权Rolling cone bit having gage and nestled gage cutter elements having enhancements in materials and geometry to optimize borehole corner cutting duty 失效具有量具和套管式切割器元件的滚动钻头具有增强的材料和几何形状以优化钻孔角切削功能
公开(公告)号：US5967245A
公开(公告)日：1999-10-19
申请号：US879874
申请日：1997-06-20
申请人： Gary Edward Garcia , Gary Ray Portwood , James Carl Minikus , Per Ivar Nese , Dennis Cisneros , Chris Edward Cawthorne , Madapusi K. Keshavan
发明人： Gary Edward Garcia , Gary Ray Portwood , James Carl Minikus , Per Ivar Nese , Dennis Cisneros , Chris Edward Cawthorne , Madapusi K. Keshavan
CPC分类号： E21B17/1092 , E21B10/16 , E21B10/52
摘要： A rolling cone bit includes a cone cutter having a gage row and an adjacent nestled gage row of cutter elements that are positioned on gage so as to divide or share the borehole corner cutting duty. The wear resistance, hardness, toughness and shape of the cutter elements in the adjacent rows are optimized depending upon the type of cutting the respective rows perform, the characteristics of the formation being drilled and the drilling techniques being employed. In most applications, the nestled gage cutter elements will have cutting surfaces that are more wear resistant or harder than the cutting surfaces of the gage cutter elements which experience more bottom hole duty. The nestled gage cutter elements engage the borehole wall with a negative rake angle for increased durability. Preferably, the nestled gage cutter elements have continuously contoured and non-shearing cutting surfaces.
摘要翻译： 滚动锥头包括锥形切割器，该切割器具有定位在量规上的量具行和相邻的切割器元件排列，以分割或共享钻孔角切削功能。 相邻行中的切割器元件的耐磨性，硬度，韧性和形状根据相应行执行的切割类型，被钻孔的特征和所采用的钻孔技术而优化。 在大多数应用中，配套的量具切割器元件将具有比经验更多的底坑功能的量规切割器元件的切割表面更耐磨或更硬的切割表面。 套管式切割器元件与具有负前角的钻孔壁接合以提高耐久性。 优选地，所述定位的量具切割器元件具有连续成型和非剪切切割表面。
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