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公开(公告)号：US4836307A
公开(公告)日：1989-06-06
申请号：US139602
申请日：1987-12-29
申请人： Madapusi K. Keshavan , Lance D. Underwood , Naresh J. Kar , Thomas W. Oldham , Cary A. Roth , Brian J. Armstrong
发明人： Madapusi K. Keshavan , Lance D. Underwood , Naresh J. Kar , Thomas W. Oldham , Cary A. Roth , Brian J. Armstrong
CPC分类号： E21B10/50 , B23K35/327 , C22C29/08 , Y10T428/1209
摘要： A hard facing for teeth on a milled tooth rock bit comprises at least 65% by weight of a mixture of tungsten carbide particles and a balance of steel bonding the carbide particles together and to the cutter cone of the rock bit. The tungsten carbide particle mixture comprises from 35% to 80%, and preferably from 65% to 80%, by weight 20 to 30 mesh cemented tungsten carbide, and from 20% to 65%, and preferably from 20% to 35% by weight 40 to 89 mesh single crystal monotungsten carbide.
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公开(公告)号：US4944774A
公开(公告)日：1990-07-31
申请号：US329251
申请日：1989-03-27
申请人： Madapusi K. Keshavan , Lance D. Underwood , Naresh J. Kar , Thomas W. Oldham , Cary A. Roth , Brian J. Armstrong
发明人： Madapusi K. Keshavan , Lance D. Underwood , Naresh J. Kar , Thomas W. Oldham , Cary A. Roth , Brian J. Armstrong
CPC分类号： B23K35/327 , C22C29/08 , E21B10/50
摘要： A hard facing for teeth on a milled tooth rock bit comprises at least 65% by weight of a mixture of tungsten carbide particles and a balance of steel bonding the carbide particles together and to the cutter cone of the rock bit. The tungsten carbide particle mixture comprises from 35% to 80%, and preferably from 65% to 80%, by weight 20 to 30 mesh cemented tungsten carbide, and from 20% to 65%, and preferably from 20% to 35% by weight 40 to 80 mesh single crystal monotungsten carbide.
摘要翻译： 研磨的牙齿钻头上的牙齿的硬面包含至少65重量％的碳化钨颗粒和将碳化物颗粒结合在一起的钢板和岩石钻头的切割锥的混合物的混合物。 碳化钨颗粒混合物包含35％至80％，优选65％至80％重量的20至30目的硬质合金碳化钨，和20％至65％，优选20％至35％重量 40至80目单晶单晶碳化钨。
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公开(公告)号：US07350599B2
公开(公告)日：2008-04-01
申请号：US10967651
申请日：2004-10-18
IPC分类号： E21B10/46
CPC分类号： C22C26/00 , B22F2005/001 , C22C2026/006 , E21B10/46 , Y10T29/49885
摘要： An insert for a drill bit that includes diamond particles disposed in a matrix material, wherein the diamond particles have a contiguity of 15% or less is disclosed. A method of forming a diamond-impregnated cutting structure, that includes loading a plurality of substantially uniformly coated diamond particles into a mold cavity, pre-compacting the substantially uniformly coated diamond particles using a cold-press cycle, and heating the compacted, substantially uniformly coated diamond particles with a matrix material to form the diamond impregnated cutting structure is also disclosed.
摘要翻译： 一种用于钻头的插入件，其包括设置在基体材料中的金刚石颗粒，其中所述金刚石颗粒的接缝度为15％以下。 一种形成金刚石浸渍的切割结构的方法，其包括将多个基本上均匀涂覆的金刚石颗粒加载到模腔中，使用冷压循环对大致均匀涂覆的金刚石颗粒进行预压实，并加热压实的基本均匀的 还公开了具有基质材料以形成金刚石浸渍切割结构的涂覆金刚石颗粒。
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公开(公告)号：US07845059B2
公开(公告)日：2010-12-07
申请号：US12021131
申请日：2008-01-28
申请人： Gregory T. Lockwood , Thomas W. Oldham , Anthony Griffo , Madapusi K. Keshavan , David A. Conroy
发明人： Gregory T. Lockwood , Thomas W. Oldham , Anthony Griffo , Madapusi K. Keshavan , David A. Conroy
CPC分类号： C22C26/00 , B22F2005/001 , C22C2026/006 , E21B10/46 , Y10T29/49885
摘要： An insert for a drill bit that includes diamond particles disposed in a matrix material, wherein the diamond particles have a contiguity of 15% or less is disclosed. A method of forming a diamond-impregnated cutting structure, that includes loading a plurality of substantially uniformly coated diamond particles into a mold cavity, pre-compacting the substantially uniformly coated diamond particles using a cold-press cycle, and heating the compacted, substantially uniformly coated diamond particles with a matrix material to form the diamond impregnated cutting structure is also disclosed.
摘要翻译： 一种用于钻头的插入件，其包括设置在基体材料中的金刚石颗粒，其中所述金刚石颗粒的接缝度为15％以下。 一种形成金刚石浸渍的切割结构的方法，其包括将多个基本均匀涂覆的金刚石颗粒加载到模具腔中，使用冷压循环对大致均匀涂覆的金刚石颗粒进行预压实，并加热压实的基本均匀的 还公开了具有基质材料以形成金刚石浸渍切割结构的涂覆金刚石颗粒。
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公开(公告)号：US5494122A
公开(公告)日：1996-02-27
申请号：US317969
申请日：1994-10-04
摘要： A composite mini-extended nozzle is disclosed that is designed to both resist erosion and be strong enough to withstand the shock of a downhole drilling environment. In addition, means are provided to shroud at least a portion of the extended nozzle to further protect a portion of the nozzle nearest the exit plane from downhole obstructions. A combination of materials used to form the nozzle may include a matrix of tungsten carbides with suitable binder joined to an outer metal jacket nozzle body. A third ceramic matrix material may be utilized to line or partially line an interior passage formed by the mini-extended nozzle and a reduced in diameter portion of the nozzle design may include a built-in fracture plane in the unlikely event the end of the nozzle hits an obstruction. The extended portion of the nozzle will shear off along this fracture plane thereby preventing a nozzle washout that likely would result in a trip out of the hole to repair the resultant damage to the rock bit.
摘要翻译： 公开了一种复合微型延伸喷嘴，其设计成既可以抵抗侵蚀，又能够承受井下钻井环境的冲击。 此外，提供了用于遮盖延伸喷嘴的至少一部分的装置，以进一步保护最靠近出口平面的喷嘴的一部分不受井下障碍物的影响。 用于形成喷嘴的材料的组合可以包括具有与外部金属护套喷嘴体接合的合适粘合剂的碳化钨基体。 可以使用第三陶瓷基质材料将由微型扩展喷嘴形成的内部通道排列或部分排列，并且喷嘴设计的减小的直径部分可以包括在不太可能的情况下喷嘴端部的内置断裂平面 遇到障碍 喷嘴的延伸部分将沿着该断裂平面剪切，从而防止可能导致从孔中脱出的喷嘴冲洗，以修复对钻石钻头造成的损坏。
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公开(公告)号：US4869329A
公开(公告)日：1989-09-26
申请号：US239162
申请日：1988-08-31
申请人： Naresh J. Kar , Thomas W. Oldham
发明人： Naresh J. Kar , Thomas W. Oldham
摘要： A new and improved tungsten carbide insert for rock bits is disclosed, in which the inserts are subject to extended vibratory tumbling in order to increase their fracture toughness. More specifically the vibratory finishing or tumbling of the inserts has been increased from a typical time of 30-60 minutes to time periods of at least 90 minutes and preferably a minimum of 225 minutes. A marked improvement in toughness is obtained by this process because the size and distribution of surface flaws of the inserts were greatly reduced, and because the surface hardness of the inserts was increased, thereby resulting in an increase in the stress required to cause fracture, and a consequent increase in resistance to breakage.
摘要翻译： 公开了一种新的改进的用于岩屑的碳化钨刀片，其中为了增加其断裂韧性，插入件经受延长的振动翻滚。 更具体地，插入物的振动整理或翻转已经从30-60分钟的典型时间增加到至少90分钟的时间段，优选地最小为225分钟。 通过该方法可以获得韧性的明显改善，因为刀片的表面缺陷的尺寸和分布大大降低，并且由于刀片的表面硬度增加，从而导致引起断裂所需的应力增加， 随之而来的耐破裂性增加。
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公开(公告)号：US07997358B2
公开(公告)日：2011-08-16
申请号：US12582212
申请日：2009-10-20
申请人： Saul N Izaguirre , Thomas W. Oldham , Kumar T Kembaiyan , Gary Chunn , Anthony Griffo , Robert Denton , Brian A White
发明人： Saul N Izaguirre , Thomas W. Oldham , Kumar T Kembaiyan , Gary Chunn , Anthony Griffo , Robert Denton , Brian A White
IPC分类号： E21B10/46
CPC分类号： E21B10/567 , B22F7/06 , B22F7/062 , B22F2005/001
摘要： A bit body formed of a mixture of matrix material and superabrasive powder and including pockets lined with superabrasive-free matrix material, and a method for forming the same, are provided. The pockets are shaped to receive cutting elements therein. The superabrasive-free matrix material enhances braze strength when a cutting element is brazed to surfaces of the pocket. The method for forming the drill bit body includes providing a mold and displacements. The displacements are coated with a mixture of superabrasive free matrix-material and an organic binder. The mold is packed with a mixture of matrix material and superabrasive powder and the arrangement heated to form a solid drill bit body. When the solid bit body is removed from the mold, pockets are formed by the displacements in the bit body and are lined with the layer of superabrasive-free matrix material. The superabrasive material may be diamond, polycrystalline cubic boron nitride, SiC or TiB2 in exemplary embodiments.
摘要翻译： 由基体材料和超级磨料粉末的混合物形成的一个体，并且包括衬有超无磨料基质材料的口袋及其形成方法。 口袋被成形为在其中容纳切割元件。 当将切割元件钎焊到袋的表面时，超无磨料基质材料增强了钎焊强度。 用于形成钻头体的方法包括提供模具和位移。 位移用超磨料自由基质材料和有机粘合剂的混合物涂覆。 模具中填充有基体材料和超级磨料粉末的混合物，并将该装置加热形成固体钻头体。 当固体钻头体从模具中取出时，通过钻头体中的位移形成凹坑，并且衬有超级无磨料基体材料层。 在示例性实施例中，超研磨材料可以是金刚石，多晶立方氮化硼，SiC或TiB 2。
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公开(公告)号：US20100101869A1
公开(公告)日：2010-04-29
申请号：US12650162
申请日：2009-12-30
CPC分类号： E21B10/55
摘要： A drill bit that includes a steel bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade; at least one cutter disposed in the at least one cutter pocket; at least one recess formed in at least a portion of the surface of the at least one cutter pocket, wherein the recess is adjacent a leading face of the at least one blade; and an erosion resistant material in the at least one recess is disclosed.
摘要翻译： 一种钻头，其包括在其上具有至少一个刀片的钢钻头体，设置在所述至少一个刀片上的至少一个刀具凹口; 至少一个切割器设置在所述至少一个切割器凹槽中; 在所述至少一个切割器凹槽的至少一部分表面中形成的至少一个凹部，其中所述凹部邻近所述至少一个叶片的前表面; 并且公开了在所述至少一个凹部中的耐腐蚀材料。
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公开(公告)号：US20080053709A1
公开(公告)日：2008-03-06
申请号：US11511881
申请日：2006-08-29
IPC分类号： E21B10/42
CPC分类号： E21B10/55
摘要： A drill bit that includes a steel bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade; at least one cutter disposed in the at least one cutter pocket; at least one recess formed in at least a portion of the surface of the at least one cutter pocket, wherein the recess is adjacent a leading face of the at least one blade; and an erosion resistant material in the at least one recess is disclosed.
摘要翻译： 一种钻头，其包括在其上具有至少一个刀片的钢钻头体，设置在所述至少一个刀片上的至少一个刀具凹口; 至少一个切割器设置在所述至少一个切割器凹槽中; 在所述至少一个切割器凹槽的至少一部分表面中形成的至少一个凹部，其中所述凹部邻近所述至少一个叶片的前表面; 并且公开了在所述至少一个凹部中的耐腐蚀材料。
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公开(公告)号：US06375706B2
公开(公告)日：2002-04-23
申请号：US09758896
申请日：2001-01-11
IPC分类号： C22C105
CPC分类号： C22C29/067 , B22F7/06 , B22F2005/001 , E21B10/00
摘要： A composition for drill bit bodies and a method for making drill bits from the composition are disclosed. The composition includes powdered tungsten carbide, and binder metal consisting of a composition by weight of manganese in a range of about zero to 25 percent, nickel in a range of about zero to 15 percent, zinc in a range of about 3 to 20 percent, tin in a range of more than 1 percent to about 10 percent, and copper making up the remainder by weight of the composition. In one embodiment, the composition includes about 6 to 7 percent tin therein. The composition is heated to at least the infiltration temperature in a mold for form a drill bit body.
摘要翻译： 公开了一种用于钻头体的组合物和从该组合物制造钻头的方法。 该组合物包括粉末状碳化钨和由约0.05至25重量％的锰组成的粘合剂金属，约0.5至约15重量％的镍，约3至20重量％的锌， 锡在超过1％至约10％的范围内，铜占组合物重量的余量。 在一个实施方案中，组合物包含其中约6至7％的锡。 将组合物加热至至少在模具中的浸渗温度以形成钻头体。
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