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1. 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。

2. 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。

3. 发明授权

US5495899A Reamer wing with balanced cutting loads 失效
标题翻译：铰刀翼具有平衡的切割载荷
公开(公告)号：US5495899A
公开(公告)日：1996-03-05
申请号：US431269
申请日：1995-04-28
申请人： Paul E. Pastusek , Steve R. Matson
发明人： Paul E. Pastusek , Steve R. Matson
IPC分类号： E21B10/26 , E21B10/46 , E21C25/10
CPC分类号： E21B10/26
摘要： A multi-bladed reaming apparatus for enlarging a subterranean borehole, the apparatus having a tubular body with a plurality of longitudinally-extending, circumferentially-spaced, generally radially-extending blades carrying cutting elements, the blades being unequally spaced about the body. The cutting depth of the cutting elements on at least one of the blades is adjusted to modify the distribution of the depth of cut (DOC) among the cutting elements to substantially equalize the volume of formation material removed by the blades. Wear is reduced and the potential for premature failure of cutting elements on any single blade is alleviated.
摘要翻译：一种用于扩大地下钻孔的多叶片扩孔装置，该装置具有管状主体，该管状主体具有多个纵向延伸的周向隔开的，大致径向延伸的叶片，其承载切割元件，所述叶片围绕主体不相等。调节至少一个叶片上的切割元件的切割深度以改变切割元件之间的切割深度（DOC）的分布，以基本上均衡由叶片去除的成形材料的体积。磨损减少，任何单个刀片上切割元件过早失效的可能性得到缓解。

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