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    METHODS FOR FORMING BORING SHOES FOR WELLBORE CASING, AND BORING SHOES AND INTERMEDIATE STRUCTURES FORMED BY SUCH METHODS
    3.
    发明申请
    METHODS FOR FORMING BORING SHOES FOR WELLBORE CASING, AND BORING SHOES AND INTERMEDIATE STRUCTURES FORMED BY SUCH METHODS 审中-公开
    用于形成井筒的镗孔的方法，以及通过这种方法形成的镗孔和中间结构

    公开(公告)号：US20100252331A1

    公开(公告)日：2010-10-07

    申请号：US12416804

    申请日：2009-04-01

    申请人： Angela D. High ,  Christopher C. Beuershausen ,  Adam Richard Williams

    发明人： Angela D. High ,  Christopher C. Beuershausen ,  Adam Richard Williams

    IPC分类号： E21B19/18 ,  E21B7/20 ,  E21B17/14

    CPC分类号： E21B17/14 ,  E21B17/042

    摘要： Methods of attaching a crown of a boring shoe to a casing section include attaching an adaptable shank to a crown, and machining the adaptable shank to configure an end thereof for attachment to a casing section after attaching the adaptable shank to the crown. Additional methods include welding an end of an adaptable shank to a crown to form a boring shoe, selecting the adaptable shank to have an average wall thickness greater than about five percent (5%) of a maximum diameter of the crown, and configuring an opposite end of the adaptable shank for attachment to a particular type of casing section after welding the shank to the crown. Boring shoes have an adaptable shank attached to a crown, wherein the shank comprises a generally cylindrical wall having an average wall thickness greater than about five percent (5%) of a maximum diameter of the crown.

    摘要翻译： 将镗孔的顶部附接到壳体部分的方法包括将可适应的柄附接到冠部，并且在将可适应柄部附接到冠部之后，将可适应的柄部加工成构造其端部以附接到套管部分。 附加的方法包括将可适应的柄的端部焊接到冠部以形成镗孔，选择适应性柄以使平均壁厚度大于冠部的最大直径的大约百分之五（5％），并且配置相反的 在将柄部焊接到冠部之后，用于附接到特定类型的套管部分的适配柄的端部。 镗孔鞋具有附接到冠部的适应柄，其中所述杆包括大致圆柱形的壁，其平均壁厚度大于顶部的最大直径的大约百分之五（5％）。

    Rotary drill bits employing tandem gage pad arrangement
    6.
    发明授权
    Rotary drill bits employing tandem gage pad arrangement 失效
    旋转钻头采用串联量具垫排列

    公开(公告)号：US6112836A

    公开(公告)日：2000-09-05

    申请号：US924935

    申请日：1997-09-08

    申请人： John R. Spaar ,  James A. Norris ,  Christopher C. Beuershausen ,  Rudolf C. O. Pessier ,  Michael P. Ohanian ,  Roland Illerhaus ,  Jeffrey B. Lund ,  Michael L. Doster

    发明人： John R. Spaar ,  James A. Norris ,  Christopher C. Beuershausen ,  Rudolf C. O. Pessier ,  Michael P. Ohanian ,  Roland Illerhaus ,  Jeffrey B. Lund ,  Michael L. Doster

    IPC分类号： E21B7/08 ,  E21B10/46 ,  E21B17/10

    CPC分类号： E21B17/1092 ,  E21B10/46

    摘要： A rotary drag bit being suitable for directional drilling. The bit includes a bit body from which extend radially-oriented blades carrying PDC cutters. The blades extend to primary gage pads, above which secondary gage pads are either longitudinally spaced or rotationally spaced, or both, defining a gap or discontinuity between the primary and secondary gage pads through which drilling fluid from adjacent junk slots may communicate laterally or circumferentially. Longitudinally leading edges of the secondary gage pads may carry cutters for smoothing the sidewall of the borehole. The tandem primary and secondary gage pads provide enhanced bit stability and reduced side cutting tendencies. The discontinuities between the primary and secondary gage pads enhance fluid flow from the bit face to the borehole annulus above the bit, promoting formation cuttings removal. The tandem gage arrangement also has utility in conventional bits not designed specifically for directional drilling.

    摘要翻译： 旋转拖曳钻头适用于定向钻孔。 该钻头包括一个承载PDC切割器的径向定向刀片的位体。 叶片延伸到主量规焊盘，在其上方，二次量规焊盘沿纵向间隔开或旋转间隔开，或两者限定了初级和次级量规焊盘之间的间隙或不连续性，通过该间隙或不连续性，来自相邻垃圾槽的钻井液体可横向或周向地连通。 二次测量垫的纵向前缘可携带用于使钻孔侧壁平滑的切割器。 串联一次和二次测量垫提供增强的位稳定性和减少的侧切倾向。 主和二次测量垫之间的不连续性增强了从钻头面到钻头上方的钻孔环之间的流体流动，促进了去除切屑。 串联量规布置也可用于不专门用于定向钻孔的常规钻头中。

    Multi-aggressiveness cuttting face on PDC cutters and method of drilling subterranean formations
    8.
    发明授权
    Multi-aggressiveness cuttting face on PDC cutters and method of drilling subterranean formations 有权
    PDC切割机上的多重侵蚀性切割面和钻探地下地层的方法

    公开(公告)号：US06672406B2

    公开(公告)日：2004-01-06

    申请号：US09748771

    申请日：2000-12-21

    申请人： Christopher C. Beuershausen

    发明人： Christopher C. Beuershausen

    IPC分类号： E21B1046

    CPC分类号： E21B10/43 ,  E21B10/55 ,  E21B10/567 ,  E21B10/5673 ,  E21B10/5735 ,  E21B17/1092

    摘要： Methods of drilling subterranean formations with rotary drag bits equipped with cutting elements including superabrasive, multi-aggressive cutting faces or profiles which are especially suitable for drilling formations of varying hardness and for directional drilling through formations of varying hardness are disclosed. Methods including providing and using rotary drill bits incorporating cutting elements having appropriately aggressive and appropriately positioned cutting surfaces so as to enable the cutting elements to engage the particular formation being drilled at an appropriate depth-of-cut at a given weight-on-bit to maximize rate of penetration without generating excessive, unwanted torque on bit are disclosed. The configuration, surface area, and effective backrake angle of each provided cutting surface, as well as individual cutter backrake angles, may be customized and varied to provide a cutting element having a cutting face aggressiveness profile that varies both longitudinally and radially along the cutting face of the cutting element.

    摘要翻译： 公开了具有旋转拖曳钻头的钻井地层的方法，所述旋转拖曳钻头配备有切削元件，所述切削元件包括特别适用于钻削不同硬度的钻井地层和通过不同硬度的地层进行定向钻井的超磨蚀，多侵蚀性切割面或轮廓。 方法包括提供和使用旋转钻头，其包含具有适当侵蚀性和适当定位的切割表面的切割元件，以便使得切割元件能够以给定的钻头重量在适当的切割深度钻孔， 公开了最大化穿透速率而不产生过度的不必要的转矩。 可以定制和改变每个设置的切割表面的构造，表面积和有效的反向角度以及各个切割器后退角度，以提供切割元件，该切割元件具有沿着切割面沿纵向和径向变化的切割面侵蚀性轮廓 的切割元件。