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公开(公告)号：US20080179107A1
公开(公告)日：2008-07-31
申请号：US12020399
申请日：2008-01-25
申请人： Michael L. Doster
发明人： Michael L. Doster
IPC分类号： E21B10/43
摘要： A rotary drag bit includes a bit body having a face and an axis, a plurality of blades extending radially and longitudinally outward from the face, and at least one split cutter set. The split cutter set includes a plurality of cutters, where at least two of the cutters are primary and/or kerfing cutters located on different blades of the plurality of blades. The pair of primary and/or kerfing cutters of the split cutter set may be located substantially the same radial distance from a center line, or axis of rotation, of the bit and located at substantially the same longitude, or elevation, on the bit as one another, or follow substantially the same rotational or helical cutting path as each other. In addition, at least one backup cutter may be located substantially the same radial distance from a center line, or axis of rotation, of the bit and located at substantially the same longitude, or elevation, on the bit as one or both primary and/or kerfing cutters, or follow substantially the same rotational or helical path as one or both of the primary and/or kerfing cutters. The cutters of a split cutter set may be configured and oriented to provide improved bit life and reduced stress on the cutters. Other embodiments of rotary drag bits are also provided, including methods therefor.
摘要翻译： 旋转牵引钻头包括具有面和轴的钻头体，从表面径向和纵向向外延伸的多个刀片以及至少一个分割刀具组。 分割刀具组包括多个切割器，其中至少两个切割器是位于多个叶片的不同叶片上的主和/或切割切割器。 分割刀具组的一对初级和/或切割刀具可以位于与钻头的中心线或旋转轴线基本相同的径向距离处，并且位于与钻头位置基本相同的经度或高度处 或者基本上相同的旋转或螺旋切割路径彼此相依。 此外，至少一个备用切割器可以位于与钻头的中心线或旋转轴线基本相同的径向距离处，并且位于钻头上基本上相同的经度或高度处，作为主要和/ 或切割刀具，或者遵循基本相同的旋转或螺旋路径作为主要和/或切割刀具中的一个或两个。 分割刀具组的切割器可以被配置和定向以提供改善的钻头寿命并减小刀具上的应力。 还提供了旋转阻力钻头的其它实施例，包括其方法。
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公开(公告)号：US5957223A
公开(公告)日：1999-09-28
申请号：US811581
申请日：1997-03-05
申请人： Michael L. Doster , Jack T. Oldham
发明人： Michael L. Doster , Jack T. Oldham
摘要： A method and apparatus for reaming or enlarging a borehole using a bi-center bit with a stability-enhanced design. The cutters on the pilot bit section of the bi-center bit are placed and oriented to generate a lateral force vector longitudinally offset from, but substantially radially aligned with, the much larger lateral force vector generated by the reamer bit section. These two aligned force vectors thus tend to press the bit in the same lateral direction (which moves relative to the borehole sidewall as the bit rotates) along its entire longitudinal extent so that a single circumferential area of the pilot bit section gage rides against the sidewall of the pilot borehole, resulting in a reduced tendency for the bit to cock or tilt with respect to the axis of the borehole. Further, the pilot bit section includes enhanced gage pad area to accommodate this highly-focused lateral loading, particularly that attributable to the dominant force vector generated by the reamer bit section, so that the pilot borehole remains in-gage and round in configuration, providing a consistent longitudinal axis for the reamer bit section to follow.
摘要翻译： 一种用于使用具有稳定性增强设计的双中心钻头来扩孔或扩大钻孔的方法和装置。 双中心钻头的导向钻头部分上的切割器被放置和定向以产生与由铰刀钻头部分产生的大得多的侧向力矢量纵向偏离但基本上径向对齐的横向力矢量。 这两个对准的力矢量因此倾向于沿着其整个纵向范围沿相同的横向方向（相对于钻头侧壁相对于钻孔侧壁移动）来按压钻头，使得导向钻头部分量规的单个周向区域抵靠侧壁 导致钻头相对于钻孔的轴线旋转或倾斜的趋势减小。 此外，导频位部分包括增强的测量焊盘区域以适应这种高度集中的横向负载，特别是可归因于由铰刀钻头部分产生的主力矢量，使得导向钻孔保持在构造中的圆周范围，从而提供 用于铰刀钻头部分的纵向轴线一致。
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公开(公告)号：US07836979B2
公开(公告)日：2010-11-23
申请号：US12260245
申请日：2008-10-29
摘要： A drill bit having a bit body includes a blade face surface on at least one blade extending longitudinally and radially outward over a face of the bit body. The blade face surface of the at least one blade includes a contact zone and a sweep zone. The sweep zone rotationally trails the contact zone with respect to a direction of intended bit rotation about a longitudinal axis of the bit body provides reduce rubbing contact when engaging with a subterranean formation.
摘要翻译： 具有钻头体的钻头包括在钻头体的表面上纵向和径向向外延伸的至少一个刀片上的刀片表面。 所述至少一个叶片的叶片表面包括接触区域和扫掠区域。 扫掠区域相对于围绕钻头体的纵向轴线的预期钻头旋转的方向旋转地接触接触区域，并且当与地下地层接合时提供减少的摩擦接触。
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公开(公告)号：US20100018777A1
公开(公告)日：2010-01-28
申请号：US12179915
申请日：2008-07-25
IPC分类号： E21B10/16
CPC分类号： E21B10/14
摘要： An earth-boring bit comprising a bit body configured at its upper extent for connection into a drillstring. A selected number of fixed blades extend downward from the bit body and a selected number of rolling cutters are mounted for rotation on the bit body. A plurality of rolling-cutter cutting elements are arranged on each rolling cutter and a plurality of fixed-blade cutting elements are arranged on each fixed blade. The selected number of fixed blades exceeds the selected number of rolling cutters by at least one.
摘要翻译： 一种钻地钻头，包括在其上部配置的钻头体，用于连接到钻柱。 选定数量的固定刀片从钻头体向下延伸，并且选择数量的滚刀被安装用于在钻头体上旋转。 在每个轧制刀具上设置有多个轧机切割元件，并且在每个固定刀片上布置有多个固定刀片切割元件。 所选数量的固定刀片至少超过选定数量的滚刀。
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公开(公告)号：US20090084606A1
公开(公告)日：2009-04-02
申请号：US11865296
申请日：2007-10-01
申请人： Michael L. Doster
发明人： Michael L. Doster
IPC分类号： E21B10/56
CPC分类号： E21B10/42
摘要： A drill bit that includes a boss extending rotationally forward of at least one blade thereof in a gage region of a bit body for increasing stability and reducing impact shock caused by a lateral imbalance force acting on the bit while drilling a subterranean formation is disclosed. The boss includes a circumferential bearing surface that rotationally precedes a circumferential bearing surface of the at least one blade. A drill bit that includes a boss having a nozzle port extending therein is also disclosed.
摘要翻译： 公开了一种钻头，其包括在钻头体的表面区域中的至少一个叶片的旋转前方延伸的凸台，用于提高稳定性并减少在钻探地下地层时由作用在钻头上的横向不平衡力引起的冲击冲击。 凸台包括旋转地在至少一个叶片的圆周支承表面之前的圆周支承表面。 还公开了一种钻头，其包括具有在其中延伸的喷嘴端口的凸台。
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公开(公告)号：US20080190670A1
公开(公告)日：2008-08-14
申请号：US12029197
申请日：2008-02-11
IPC分类号： E21B10/52
CPC分类号： E21B10/43
摘要： A fixed cutter rotary drill bit having gauge cutting elements at large back rake angles are disclosed. The gauge is located at the outer diameter side wall portion of the bit that extends from the cutting end. The gauge and its cutting components contact the side wall of the bore hole during drilling operations. The gauge cutting elements may be configured at a back rake angle in a range of about 40° to 70°.
摘要翻译： 公开了一种具有大后排前角的量规切割元件的固定式旋转钻头。 该量规位于从切割端延伸的钻头的外径侧壁部分。 测量仪及其切割部件在钻孔操作期间接触钻孔的侧壁。 量规切割元件可以构造在约40°至70°的范围内的后倾角。
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37.发明授权Reaming apparatus and method with enhanced stability and transition from pilot hole to enlarged bore diameter 失效扩孔设备和方法具有增强的稳定性和从导向孔到扩大孔径的过渡
公开(公告)号：US6116356A
公开(公告)日：2000-09-12
申请号：US94796
申请日：1998-06-15
摘要： A method and apparatus for reaming or enlarging a borehole with enhanced stability. A pilot stabilization pad (PSP) having an axially and circumferentially tapered entry surface and a circumferential transition surface thereabove is employed to enhance the transition from the smaller diameter borehole to be enlarged while accommodating the side force vector generated by the cutting assembly used to effect the enlargement. In addition, one or more eccentric stabilizers are employed above the reaming apparatus to laterally or radially stabilize the bottomhole assembly, which may comprise either a straight-hole or steerable, motor-driven assembly.
摘要翻译： 一种增加稳定性的用于扩孔或扩大钻孔的方法和装置。 采用具有轴向和周向渐变的进入表面和其上方的圆周过渡表面的先导稳定垫（PSP）来增强从较小直径钻孔的过渡，以增加由用于实现该切割组件的切割组件产生的侧向力矢量 放大。 此外，在扩孔装置上方使用一个或多个偏心稳定器以横向或径向地稳定井底组件，其可以包括直孔或可操纵的电动机驱动组件。
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38.发明授权公开(公告)号：US08689910B2
公开(公告)日：2014-04-08
申请号：US12714585
申请日：2010-03-01
申请人： Michael L. Doster
发明人： Michael L. Doster
IPC分类号： E21B10/36
CPC分类号： E21B10/567 , B23P15/28 , E21B10/43 , E21B10/55
摘要： A rotary drag bit for drilling subterranean formations includes a bit body having a face extending from a centerline to a gage. A plurality of blades may be disposed on the face, and may generally extend radially outwardly toward the gage. The bit may further include a plurality of discrete impregnated cutting posts, each of which may extend outwardly from an associated blade. Each discrete impregnated cutting post angles generally toward a front edge of the associated blade and generally toward the intended direction of rotation of the bit. The rotary drag bit may further include a plurality of matrix pockets disposed on the blades. The discrete impregnated cutting posts may be housed within corresponding matrix pockets.
摘要翻译： 用于钻探地下地层的旋转牵引钻头包括具有从中心线延伸到量具的面的钻头体。 多个叶片可以设置在面上，并且通常可朝向量规径向向外延伸。 该钻头还可以包括多个离散浸渍的切割柱，每个切割柱可以从相关联的叶片向外延伸。 每个离散的浸渍切割柱角度通常朝向相关联的叶片的前边缘并且大体朝向钻头的预期旋转方向。 旋转阻力钻头还可以包括设置在叶片上的多个矩阵凹坑。 离散的浸渍切割柱可以容纳在相应的矩阵凹坑内。
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39.发明申请EARTH-BORING TOOLS HAVING CUTTING ELEMENTS WITH CUTTING FACES EXHIBITING MULTIPLE COEFFICIENTS OF FRICTION, AND RELATED METHODS 有权具有切割元件的切割元件的地面工具展示多个摩擦系数及相关方法公开(公告)号：US20130292188A1
公开(公告)日：2013-11-07
申请号：US13461388
申请日：2012-05-01
申请人： Juan Miguel Bilen , Anthony A. DiGiovanni , Chih C. Lin , Suresh G. Patel , Rudolf Carl Pessier , Danny E. Scott , Michael L. Doster
发明人： Juan Miguel Bilen , Anthony A. DiGiovanni , Chih C. Lin , Suresh G. Patel , Rudolf Carl Pessier , Danny E. Scott , Michael L. Doster
CPC分类号： B24D18/009 , B23K26/3584 , B23P15/28 , E21B10/567 , E21B10/5676 , E21B2010/566
摘要： An earth-boring tool having at least one cutting element with a multi-friction cutting face provides for the steering of formation cuttings as the cuttings slide across the cutting face. The multi-friction cutting element includes a diamond table bonded to a substrate of superabrasive material. The diamond table has a cutting face formed thereon with a cutting edge extending along a periphery of the cutting face. The cutting face has a first area having an average surface finish roughness less than an average surface finish roughness of a second area of the cutting face, the two areas separated by a boundary having a proximal end proximate the tool crown and a distal end remote from the tool crown.
摘要翻译： 具有至少一个具有多摩擦切割面的切割元件的钻孔工具提供了当切割物滑过切割面时的成形切屑的转向。 多摩擦切割元件包括结合到超级磨料材料的基底上的金刚石台。 钻石台具有形成在其上的切割面，切割刃沿着切割面的周边延伸。 切割面具有平均表面粗糙度小于切割面的第二区域的平均表面光洁度粗糙度的第一区域，两个区域被具有靠近工具顶部的近端分隔的边界和远离工具顶端的远端 工具表冠。
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公开(公告)号：US07819208B2
公开(公告)日：2010-10-26
申请号：US12179915
申请日：2008-07-25
IPC分类号： E21B10/14
CPC分类号： E21B10/14
摘要： An earth-boring bit comprising a bit body configured at its upper extent for connection into a drillstring. A selected number of fixed blades extend downward from the bit body and a selected number of rolling cutters are mounted for rotation on the bit body. A plurality of rolling-cutter cutting elements are arranged on each rolling cutter and a plurality of fixed-blade cutting elements are arranged on each fixed blade. The selected number of fixed blades exceeds the selected number of rolling cutters by at least one.
摘要翻译： 一种钻地钻头，包括在其上部配置的钻头体，用于连接到钻柱。 选定数量的固定刀片从钻头体向下延伸，并且选择数量的滚刀被安装用于在钻头体上旋转。 在每个轧制刀具上设置有多个轧机切割元件，并且在每个固定刀片上布置有多个固定刀片切割元件。 所选数量的固定刀片至少超过选定数量的滚刀。
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