公开(公告)号：US4969378A

公开(公告)日：1990-11-13

申请号：US420872

申请日：1989-10-13

申请人： Mou-Chih Lu ,  Eric F. Drake

发明人： Mou-Chih Lu ,  Eric F. Drake

IPC分类号： C23C8/38 ,  E21B10/22 ,  E21B10/50 ,  E21B10/52 ,  F16C33/12

CPC分类号： F16C33/12 ,  C23C8/38 ,  E21B10/22 ,  E21B10/50 ,  E21B10/52 ,  F16C2204/60 ,  Y10S76/02 ,  Y10S76/12

摘要： A roller cutter (28) for a rotary drill bit (10) and method of making, utilizing an ion nitriding hardening process for the external surface (42) and the internal bearing surfaces (33, 34, 38) in the central cavity (30) of the roller cutter (28). The roller cutter (28) is made from a through hardenable steel and the ion nitrided hardened layer (77) has a total thickness less than around 0.030 inch. Hardened layer (77) has a relatively thick inner stratum (80) and a relatively thin outer surface stratum (78). The outer stratum (78) is formed of Fe.sub.4 N having a thickness no greater than around 0.0004 inch to form an outer surface which is ductile and has a relatively low friction coefficient.

摘要翻译： 一种用于旋转钻头（10）的辊切割器（28）以及用于对所述中心腔（30）中的所述外表面（42）和所述内部支承表面（33,34,38）进行离子渗氮硬化处理的方法 ）滚轮切割器（28）。 辊切割器（28）由通过可硬化的钢制成，并且离子渗氮硬化层（77）的总厚度小于约0.030英寸。 硬化层（77）具有较厚的内层（80）和较薄的外表层（78）。 外层（78）由厚度不大于约0.0004英寸的Fe4N形成，形成延展性且摩擦系数相对较低的外表面。

公开(公告)号：US4595067A

公开(公告)日：1986-06-17

申请号：US571410

申请日：1984-01-17

申请人： Eric F. Drake

发明人： Eric F. Drake

IPC分类号： B22F7/06 ,  B23K31/02 ,  E21B10/52 ,  E21B10/56 ,  E21B10/567 ,  E21B10/46 ,  E21B10/50

CPC分类号： E21B10/567 ,  B22F7/06 ,  B23K31/025 ,  E21B10/52 ,  B22F2998/00

摘要： A roller cutter for a rotary drill bit comprising a conical roller cutter body of metal, and a plurality of cutting elements secured to the outer surface of the roller cutter body primarily by welding and being substantially free of mechanical interconnection to the roller cutter body. Each cutting element is an elongate member having a base portion at one end thereof engageable with the roller cutter body and a tip portion at the other end thereof engageable with the formation to be drilled for drilling the formation. The element is formed of a material at its tip portion which has relatively high compressive strength and good wear resistance properties, but which also has a coefficient of thermal expansion and elastic moduli significantly different from those of the metal of the cutter body thereby rendering it incapable of being satisfactorily welded thereto, and being formed of a material at its base portion which has a coefficient of expansion and elastic moduli similar to those of the metal of the cutter body thereby enabling it to be welded thereto. The cutting elements are formed of a composite material having first and second phases, with the volume fractions of these phases varying in a generally continuous composition gradient along the length thereof. In addition, a drag type drill bit, and a method of manufacturing the roller cutter and the drag bit are disclosed.

摘要翻译： 一种用于旋转钻头的滚子切割机，包括金属的圆锥滚子切割器主体，以及多个切割元件，其主要通过焊接固定到滚子切割器主体的外表面，并且基本上没有与滚子切割器主体的机械互连。 每个切割元件是细长构件，其一端具有与滚子切割器本体接合的基部，另一端的末端部分可与用于钻孔地层的钻孔接合。 该元件由其顶端部分的材料形成，其具有相对高的抗压强度和良好的耐磨性能，但也具有与刀体的金属的热膨胀系数和弹性模量明显不同的热膨胀系数，从而使其不能 并且由其基部的材料形成，该材料具有与刀体的金属类似的膨胀系数和弹性模量，从而使其能够被焊接到其上。 切割元件由具有第一相和第二相的复合材料形成，这些相的体积分数沿其长度以大致连续的组成梯度变化。 此外，还公开了一种拖曳式钻头，以及制造滚轮切割机和拖曳钻头的方法。

公开(公告)号：US5161898A

公开(公告)日：1992-11-10

申请号：US726024

申请日：1991-07-05

申请人： Eric F. Drake

发明人： Eric F. Drake

IPC分类号： E21B10/22 ,  F16C33/12

CPC分类号： F16C33/12 ,  E21B10/22 ,  F16C2204/20 ,  F16C2352/00 ,  Y10S384/901 ,  Y10S384/912 ,  Y10S384/913

摘要： A roller cutter drill bit (10) has separate bearing elements (82, 84, 86) positioned between a journal (20) and a roller cutter (60) mounted for rotation on the journal (20). The bearing elements (82, 84, 86) are formed of a superalloy material and the bearing surfaces of the bearing elements (82, 84, 86) have an aluminide coating applied thereon to form a bearing surface stable at operating temperatures over 500 F. and as high as 1000 F.

公开(公告)号：US4368788A

公开(公告)日：1983-01-18

申请号：US185694

申请日：1980-09-10

申请人： Eric F. Drake

发明人： Eric F. Drake

IPC分类号： B22F7/06 ,  E21B10/22 ,  E21B10/46 ,  E21B10/50 ,  E21B10/52 ,  E21B10/58 ,  E21B10/08

CPC分类号： B22F7/06 ,  E21B10/22 ,  E21B10/46 ,  E21B10/50 ,  E21B10/52 ,  E21B10/58 ,  B22F2999/00

摘要： A rolling cutter drill bit is disclosed having cutters manufactured by powder metallurgy techniques, said cutters having gradient composite metallic structures in the cutting areas arranged to reduce or eliminate physical and metallic discontinuities and stress risers.

摘要翻译： 公开了一种具有通过粉末冶金技术制造的切割器的轧制切割钻头，所述切割器在切割区域中具有梯度复合金属结构，以减少或消除物理和金属不连续性以及应力梯度。

公开(公告)号：US20110031028A1

公开(公告)日：2011-02-10

申请号：US12536624

申请日：2009-08-06

申请人： Harold Sreshta ,  Eric F. Drake ,  Douglas B. Caraway

发明人： Harold Sreshta ,  Eric F. Drake ,  Douglas B. Caraway

IPC分类号： E21B10/00 ,  B32B3/26 ,  B22F1/00 ,  B21D22/00

CPC分类号： E21B10/46 ,  B22F1/025 ,  B22F7/08 ,  B22F2005/001 ,  B22F2998/10 ,  B24D3/06 ,  B24D3/342 ,  C22C19/03 ,  C22C19/07 ,  C22C26/00 ,  C22C29/08 ,  C22C2204/00 ,  Y10T428/12042 ,  Y10T428/249953 ,  B22F3/04 ,  B22F3/17

摘要： A hardmetal composite used as wear-resistant surfaces and inlays in earth-engaging equipment includes more than one hardphase. At least one hardphase has a high average particle size, for example, from 100 μm to 2000 μm. The hardphases vary in terms of particle size, hardness, and binder content, and at least one hardphase includes a particulate constituent capable of plastic deformation that comprises at least 1% residual porosity.

摘要翻译： 用作地面接合设备中的耐磨表面和嵌体的硬质合金复合材料包括多于一个的硬质相。 至少一个硬相具有高的平均粒度，例如从100μm到2000μm。 硬化物在粒度，硬度和粘合剂含量方面有所不同，并且至少一个硬相包括能够塑性变形的颗粒组分，其包含至少1％的残留孔隙率。

公开(公告)号：US06361739B1

公开(公告)日：2002-03-26

申请号：US09782341

申请日：2001-02-13

申请人： Harold Sreshta ,  Eric F. Drake

发明人： Harold Sreshta ,  Eric F. Drake

IPC分类号： B22F302

CPC分类号： B22F3/225 ,  B22F7/08 ,  B22F2005/001 ,  B22F2998/00 ,  B22F2998/10 ,  B23K35/327 ,  B23K35/406 ,  C23C4/185 ,  C23C24/10 ,  B22F3/1216 ,  B22F3/04

摘要： The present invention is a new method for forming a high density hard facing rod. The rod is particularly suitable for hardfacing downhole tools including both fixed cutter and rolling cutter drill bits, bias pads for downhole rotary steerable systems, and stabilizers, and for other types of tools requiring strong and wear resistant hardfacings. The method includes the steps of: preparing a powder mix comprising carbide and metal powders, a fugitive binder, and other additives to render a moldable rheology; forming the powder mix into a powder core encased with a metal sheath to form a core-sheath assembly; and isostatically compacting the core-sheath assembly to densify the core to at least 65% of theoretical density and mechanically attach the sheath. The core fugitive binder along with residual volatile constituents may be thermally removed with or without vacuum, reducing, or inert environment prior to weld application of the composite rod.

摘要翻译： 本发明是形成高密度硬面棒的新方法。 该杆特别适用于井下工具的硬化，包括固定切割机和轧制刀具钻头，用于井下旋转导向系统的稳定器和稳定器，以及需要强力和耐磨损硬化的其它类型的工具。 该方法包括以下步骤：制备包含碳化物和金属粉末的粉末混合物，短效粘合剂和其它添加剂以产生可模塑的流变性; 将粉末混合物形成包裹金属护套的粉末芯，以形成芯鞘组件; 并且均衡地压紧芯鞘组件以将芯致密至理论密度的至少65％并机械地附接护套。 在焊接施加复合棒之前，可以使用或不使用真空，还原或惰性环境来将核心短暂的粘结剂以及残留的挥发性成分热除去。

公开(公告)号：US4887493A

公开(公告)日：1989-12-19

申请号：US218642

申请日：1988-07-13

申请人： Eric F. Drake

发明人： Eric F. Drake

IPC分类号： B23P11/02 ,  B23P15/28 ,  E21B10/52

CPC分类号： E21B10/52 ,  B23P11/025 ,  B23P15/28 ,  Y10T29/53439

摘要： A rolling cutter (24) for a rotary drill bit (10) having cutting inserts or elements (52) mounted within sockets (54) in a so-called full shrink process. The rolling cutter (24) is heated to a temperature over around 500.degree. F. in a controlled inert atomsphere in an enclosed heat chamber (71) and the inserts (52) are positioned by gravity within the sockets (54) in a slip fit for retention in an interference fit by shrinkage of the cutter body (25).