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公开(公告)号：US06991046B2
公开(公告)日：2006-01-31
申请号：US10701232
申请日：2003-11-03
IPC分类号： E21B7/28
CPC分类号： E21B10/322
摘要： An expandable eccentric reamer for placement in a drill string up-hole of a conventional drill bit. The reamer blade is actuated by drilling fluid pressure to radially extend to a drill out diameter greater than a pass-through diameter. The reamer body is shaped to have an eccentric outer surface configuration to accommodate the reamer blade therein. The reamer blade acts as a piston arm in response to drilling fluid pressure and moves along a shaft anchored in a hump region that forms an eccentricity in the outer surface configuration of the body. The reamer blade has an outer edge configuration that positions the cutters thereon to prevent them from engaging a casing of a well borehole upon deployment.
摘要翻译： 一种用于放置在常规钻头的钻柱上孔中的可扩张式偏心铰刀。 钻孔刀片通过钻井液压力来致动，径向延伸到大于通过直径的钻孔直径。 铰刀体被成形为具有偏心外表面构造以容纳其中的铰刀刀片。 铰刀刀片响应于钻井液压力而作为活塞臂，并且沿着锚定在驼峰区域中的轴移动，所述隆起区域在主体的外表面构型中形成偏心。 铰刀刀片具有将切割器定位在其上的外边缘构造，以防止它们在展开时与井眼的壳体接合。
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公开(公告)号：US06913098B2
公开(公告)日：2005-07-05
申请号：US10301049
申请日：2002-11-21
申请人： Coy M. Fielder , Rogerio H. Silva
发明人： Coy M. Fielder , Rogerio H. Silva
摘要： An improved bi-center with improved directional stability and wear resistance is disclosed, said bit optimally utilizing a plurality of shaped PDC cutting elements selectively situated about the cutting surfaces of the pilot and the reamer to produce a minimal force imbalance, where further said pilot bit and the reamer are force balanced to further reduce imbalance in the operation of the tool.
摘要翻译： 公开了一种具有改进的方向稳定性和耐磨性的改进的双中心，所述位优化地利用选择性地围绕导向器和铰刀的切割表面定位的多个成形PDC切割元件以产生最小的力不平衡，其中所述导向位 并且铰刀是力平衡的，以进一步减少工具的操作不平衡。
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公开(公告)号：US06340064B2
公开(公告)日：2002-01-22
申请号：US09392043
申请日：1999-09-08
申请人： Coy M. Fielder , Rogerio H. Silva
发明人： Coy M. Fielder , Rogerio H. Silva
IPC分类号： E21B1026
摘要： A bi-center bit adapted to be consecutively used in casing and in formation without the need of removing the bit from the borehole, the bit comprising a bit body defining a proximal end adapted for connection to a drill string, a distal end and a pass-through gauge, where the distal end defines a pilot bit and an intermediate reamer section, where each the pilot and reamer section define a cutting face. A plurality of cutting or wear elements are situated on cutting blades disposed about the cutting face of the pilot and reamer sections. Cutting or wear elements are disposed on one or more of the blades which extend to or are proximate to the pass-through gauge define an angle between the line of contact on the cutting or wear element and the material to be drilled of between 5-45 degrees.
摘要翻译： 一种双中心钻头，适于在套管和地层中连续地使用，而不需要从钻孔中移除钻头，该钻头包括限定适于连接到钻柱，近端和通道的近端的钻头体 通过量规，其中远端限定了导向钻头和中间铰刀部分，其中每个导向器和铰刀部分限定切割面。 多个切割或磨损元件位于围绕飞行员和铰刀部分的切割面设置的切割刀片上。 切割或磨损元件设置在一个或多个叶片上，其延伸到或靠近通过量规，在切割或磨损元件上的接触线与要钻探的材料之间的角度在5-45之间 度。
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公开(公告)号：US06629476B2
公开(公告)日：2003-10-07
申请号：US09969444
申请日：2001-10-02
申请人： Coy M. Fielder , Rogerio H. Silva
发明人： Coy M. Fielder , Rogerio H. Silva
IPC分类号： B21K504
摘要： The invention is directed to a bi-center drilling tool adapted to fit within and drill through a casing shoe without damage to the surrounding casing. In one embodiment, the tool comprises a bit body having a proximal and a distal end where the distal end defines a pilot bit and an intermediate reamer section, where each the pilot and reamer sections define a bit face including primary and secondary cutting blades and cutting elements disposed on said blades. In this embodiment, the cutting or wear elements disposed on the one or more cutting blades which extend to or are proximate to the pass-through gauge define a selected angle between the line of contact on the cutting or wear elements and the material to be drilled.
摘要翻译： 本发明涉及一种双中心钻孔工具，其适于装配在套管内并钻孔，而不会损坏周围的套管。 在一个实施例中，工具包括具有近端和远端的钻头体，其中远端限定导向钻头和中间铰刀部分，其中每个引导螺母部分和铰刀部分限定一个钻头面，其包括主切削刀片和次切削刀片以及切削 设置在所述叶片上的元件。 在该实施例中，设置在一个或多个切割刀片上的切割或磨损元件延伸到或靠近穿通表面限定切割或磨损元件上的接触线与要钻探的材料之间的选定角度 。
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