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1. 发明授权

US06321862B1 Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability 失效
标题翻译：用于定向钻孔的旋转钻头，采用具有切割元件和上钻能力的串联量规垫
公开(公告)号：US06321862B1
公开(公告)日：2001-11-27
申请号：US09129302
申请日：1998-08-05
申请人： Christopher C. Beuershausen , Robert J. Costo, Jr. , Danny E. Scott , Rudolf C. O. Pessier , Roland Illerhaus , Mark W. Dykstra , James A. Norris , Michael P. Ohanian , John R. Spaar
发明人： Christopher C. Beuershausen , Robert J. Costo, Jr. , Danny E. Scott , Rudolf C. O. Pessier , Roland Illerhaus , Mark W. Dykstra , James A. Norris , Michael P. Ohanian , John R. Spaar
IPC分类号： E21B1026
CPC分类号： E21B17/1092 , E21B10/46
摘要： A rotary drag bit 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 carry cutters for smoothing the sidewall of the borehole. The cutters are preferably configured and oriented so as to provide a relatively aggressive cutting edge to the formation in both longitudinal and rotational directions of bit movement, the cutting edges lying adjacent cutting surfaces preferably disposed at negative rake angles to the formation material of the borehole wall for enhanced durability. Cutters may likewise be disposed on the trailing ends of the secondary gage pads to provide an up-drill capability to facilitate removal of the bit from 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：适用于定向钻孔的旋转牵引钻头。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带有切割器，用于平滑钻孔的侧壁。切割器优选地构造和定向成在钻头移动的纵向和旋转方向上向地层提供相对侵蚀性的切割边缘，切割边缘位于切割表面附近，优选地设置成与钻孔壁的形成材料成负向的前角以提高耐久性。切割器同样可以设置在二次量规焊盘的尾端上，以提供上钻能力以便于从钻孔中移除钻头。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。

2. 发明授权

US6006845A Rotary drill bits for directional drilling employing tandem gage pad arrangement with reaming capability 失效
标题翻译：用于定向钻孔的旋转钻头，采用具有铰孔能力的串联计量垫排列
公开(公告)号：US6006845A
公开(公告)日：1999-12-28
申请号：US925284
申请日：1997-09-08
申请人： Roland Illerhaus , Christopher C. Beuershausen , Mark W. Dykstra , James A. Norris , Michael P. Ohanian , Rudolf C. O. Pessier , John R. Spaar
发明人： Roland Illerhaus , Christopher C. Beuershausen , Mark W. Dykstra , James A. Norris , Michael P. Ohanian , Rudolf C. O. Pessier , John R. Spaar
IPC分类号： E21B10/46 , E21B17/10 , E21B10/26
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 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带有切割器，用于平滑钻孔的侧壁。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。

3. 发明授权

US6112836A Rotary drill bits employing tandem gage pad arrangement 失效
标题翻译：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。

4. 发明授权

US06230828B1 Rotary drilling bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics 失效
标题翻译：用于定向钻削的旋转钻头具有可变的重量位依赖切削特性
公开(公告)号：US06230828B1
公开(公告)日：2001-05-15
申请号：US08925525
申请日：1997-09-08
申请人： Christopher C. Beuershausen , Mark W. Dykstra , Roger Fincher , Roland Illerhaus , Steve R. Matson , James A. Norris , Michael P. Ohanian , Rudolf C. O. Pessier
发明人： Christopher C. Beuershausen , Mark W. Dykstra , Roger Fincher , Roland Illerhaus , Steve R. Matson , James A. Norris , Michael P. Ohanian , Rudolf C. O. Pessier
IPC分类号： E21B1046
CPC分类号： E21B10/43 , E21B10/55 , E21B10/567 , E21B10/5673 , E21B10/5735 , E21B17/1092
摘要： A PDC-equipped rotary drag bit especially suitable for directional drilling. Cutter chamfer size and backrake angle, as well as cutter backrake, may be varied along the bit profile between the center of the bit and the gage to provide a less aggressive center and more aggressive outer region on the bit face to enhance stability while maintaining side cutting capability, as well as providing a high rate of penetration under relatively high weight on bit.
摘要翻译：配备PDC的旋转拖曳钻头，特别适用于定向钻孔。刀具倒角尺寸和回退角以及刀具回退可以沿着钻头中心和计量器之间的钻头轮廓变化，以在钻头面上提供较不具有攻击性的中心和更具侵蚀性的外部区域，以增强稳定性，同时保持侧面切割能力，以及在较高重量下提供较高的穿透率。

5. 发明授权

US06443249B2 Rotary drill bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics 有权
标题翻译：用于定向钻削的旋转钻头，具有可变的重量位依赖切割特性
公开(公告)号：US06443249B2
公开(公告)日：2002-09-03
申请号：US09854765
申请日：2001-05-14
申请人： Christopher C. Beuershausen , Mark W. Dykstra , Roger Fincher , Roland Illerhaus , Steve R. Matson , James A. Norris , Michael P. Ohanian , Rudolf C. O. Pessier
发明人： Christopher C. Beuershausen , Mark W. Dykstra , Roger Fincher , Roland Illerhaus , Steve R. Matson , James A. Norris , Michael P. Ohanian , Rudolf C. O. Pessier
IPC分类号： E21B1046
CPC分类号： E21B10/43 , E21B10/55 , E21B10/567 , E21B10/5673 , E21B10/5735 , E21B17/1092
摘要： A PDC-equipped rotary drag bit especially suitable for directional drilling. Cutter chamfer size and backrake angle, as well as cutter backrake, may be varied along the bit profile between the center of the bit and the gage to provide a less aggressive center and more aggressive outer region on the bit face, to enhance stability while maintaining side cutting capability, as well as providing a high rate of penetration under relatively high weight on bit.
摘要翻译：配备PDC的旋转拖曳钻头，特别适用于定向钻孔。切刀倒角大小和反角度以及切割器后退角度可以沿着钻头中心和计量器之间的钻头轮廓变化，以在钻头面上提供较不具有攻击性的中心和更具侵蚀性的外部区域，以在维持时提高稳定性侧切割能力，以及在相对较高的重量下提供高的穿透率。

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