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121.发明授权公开(公告)号：US06260636B1
公开(公告)日：2001-07-17
申请号：US09237086
申请日：1999-01-25
IPC分类号： E21B1046
CPC分类号： E21B17/1092 , E21B10/00 , E21B10/46 , E21B10/62
摘要： An earth boring drill bit including replaceable gage pads. The gage pads and the corresponding surface of the earth boring drill bit may include complementary securing elements which mutually engage one another. The gage pad may be removably affixed to the earth boring drill bit by an affixation element, such as a bolt, a mechanical locking element, brazing, welding, mechanical affixation, or another known technique. The invention also includes a method of testing differently configured gage pads employing a single earth boring drill bit, a method of replacing the gage pads of an earth boring drill bit at the drilling site, a method of customizing an earth boring drill bit to include one or more gage pads of desired configuration, and a method of altering the balance or net imbalance of an earth boring drill bit by replacing at least one gage pad thereof.
摘要翻译： 一个钻地钻头，包括可更换的量具垫。 测量垫和钻孔钻头的对应表面可以包括彼此相互接合的互补的固定元件。 量规垫可以通过固定元件（例如螺栓，机械锁定元件，钎焊，焊接，机械固定或其他已知技术）可移除地固定到钻孔钻头。 本发明还包括一种使用单个钻孔钻头测试不同配置的测量垫的方法，一种替代钻孔位置的钻孔钻头的量具垫的方法，一种定制钻孔钻头以包括一个 或更多的所需构造的垫片，以及通过替换其至少一个量具垫来改变钻孔钻头的平衡或净不平衡的方法。
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公开(公告)号：US6098730A
公开(公告)日：2000-08-08
申请号：US74260
申请日：1998-05-07
申请人： Danny E. Scott , Rudolf C. O. Pessier , Robert J. Farr , Stephen R. Jurewicz , Kenneth M. Jensen , Paul D. Jones
发明人： Danny E. Scott , Rudolf C. O. Pessier , Robert J. Farr , Stephen R. Jurewicz , Kenneth M. Jensen , Paul D. Jones
IPC分类号： E21B10/16 , E21B10/46 , E21B10/52 , E21B10/56 , E21B10/567
CPC分类号： E21B10/5673 , E21B10/16 , E21B10/52
摘要： An earth-boring bit has a bit body and at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body. A cutter is mounted for rotation on the bearing shaft and includes a plurality of cutting elements. At least one of the cutting elements has a generally cylindrical body formed of hard metal with a convex cutting end. A plurality of substantially recesses are formed on the cutting end of the body. The recesses are configured such that a line parallel to the longitudinal axis of the body may extend from any point of each of the recess without touching any other point on the same recess. This enables the cutting element body and the recess to be formed simultaneously by conventional powder metallurgical techniques. A layer of super-hard material is formed on the cutting end of the body and overlays the recesses formed thereon.
摘要翻译： 钻头具有一定体积，至少有一个悬臂轴承轴从钻头体向内和向下偏移。 安装刀具用于在轴承轴上旋转并且包括多个切割元件。 至少一个切割元件具有由具有凸形切割端的硬质金属形成的大致圆柱形的主体。 在主体的切割端部上形成有多个基本凹部。 凹部被构造成使得平行于主体的纵向轴线的线可以从每个凹部的任何点延伸，而不会碰到相同凹部上的任何其它点。 这使得切割元件主体和凹部能够通过常规的粉末冶金技术同时形成。 在本体的切割端上形成一层超硬材料，并覆盖其上形成的凹部。
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123.发明授权Rotary drill bits employing optimal cutter placement based on chamfer geometry 失效旋转钻头采用基于倒角几何形状的最佳刀具布置
公开(公告)号：US5960896A
公开(公告)日：1999-10-05
申请号：US925883
申请日：1997-09-08
申请人： David H. Barr , Danny E. Scott , Craig H. Cooley
发明人： David H. Barr , Danny E. Scott , Craig H. Cooley
CPC分类号： E21B10/43 , E21B10/55 , E21B10/573
摘要： A rotary drag bit equipped with a plurality of cutters, each including a superabrasive cutting face, wherein cutters carried by the bit have at least two differing chamfer geometries adjacent their cutting edges. Chamfer geometries are selected according to location on the face of the bit responsive to the relative ease or difficulty of cutting formation rock and the severity of dynamic loading at that location. The bit face may be characterized as comprising at least two areas or regions bearing cutters having differing chamfer geometries to maximize rate of penetration of the bit while preserving cutter integrity when subjected to differing stresses and encountering zones of the formation exhibiting different strengths. Characteristics, such as hardness, abrasiveness and homogeneity, of the target formation or formations to be drilled by the bit may be considered when selecting appropriate chamfer geometries for the cutters allocated to cut each formation zone opposite the bit face.
摘要翻译： 一种装备有多个切割器的旋转牵引钻头，每个切割器包括超研磨切割面，其中由钻头承载的切割器在其切割边缘附近具有至少两个不同的倒角几何形状。 倒角几何是根据钻头表面上的位置来选择的，这是因为切割岩层的相对容易度或难度以及该位置的动态载荷的严重程度。 钻头面可被表征为包括具有不同倒角几何形状的至少两个区域或区域，以使钻头的穿透速度最大化，同时在受到不同应力和遇到具有不同强度的地层的区域时保持刀具完整性。 当为分配切割与钻头面相对的每个形成区域的切割器选择适当的倒角几何形状时，可以考虑由钻头钻出的目标形成或地层的特性，例如硬度，磨蚀性和均匀性。
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公开(公告)号：US5758733A
公开(公告)日：1998-06-02
申请号：US633983
申请日：1996-04-17
申请人： Danny E. Scott , Rudolf Carl Otto Pessier , Robert J. Farr , Stephen R. Jurewicz , Kenneth M. Jensen , Paul D. Jones
发明人： Danny E. Scott , Rudolf Carl Otto Pessier , Robert J. Farr , Stephen R. Jurewicz , Kenneth M. Jensen , Paul D. Jones
IPC分类号： E21B10/16 , E21B10/46 , E21B10/52 , E21B10/56 , E21B10/567
CPC分类号： E21B10/5673 , E21B10/16 , E21B10/52
摘要： An earth-boring bit has a bit body and at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body. A cutter is mounted for rotation on the bearing shaft and includes a plurality of cutting elements. At least one of the cutting elements has a generally cylindrical body formed of hard metal with a convex cutting end. A plurality of substantially linear, parallel lands are formed on the cutting end of the body. The lands have arcuate top surfaces and define grooves between the land having arcuate bottom surfaces. A layer of super-hard material is formed on the cutting end of the body and engages the lands and grooves formed thereon.
摘要翻译： 钻头具有一定体积，至少有一个悬臂轴承轴从钻头体向内和向下偏移。 安装刀具用于在轴承轴上旋转并且包括多个切割元件。 至少一个切割元件具有由具有凸形切割端的硬质金属形成的大致圆柱形的主体。 在主体的切割端上形成有多个基本上线性的平行的平台。 土地具有弧形的顶部表面并且在具有弓形底部表面的区域之间限定凹槽。 一层超硬材料形成在主体的切割端上并与其上形成的凸台和凹槽接合。
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公开(公告)号：US5663512A
公开(公告)日：1997-09-02
申请号：US343005
申请日：1994-11-21
申请人： Kevin W. Schader , Ronald L. Jones , James L. Overstreet , Danny E. Scott , Mou-Chih Lu , Alan J. Massey
发明人： Kevin W. Schader , Ronald L. Jones , James L. Overstreet , Danny E. Scott , Mou-Chih Lu , Alan J. Massey
CPC分类号： C22C1/051 , B22F1/0003 , B23K35/327 , C23C30/005 , C23C4/10 , E21B10/50 , B22F2999/00
摘要： A hardfacing composition comprises at least 60% by weight of hard metal granules including a quantity of sintered carbide pellets and a quantity of cast carbide pellets. The cast and sintered carbides are selected from the group of carbides consisting of chromium, molybdenum, niobium, tantalum, titanium, tungsten, and vanadium carbides and alloys and mixtures thereof. The balance of the hardfacing composition is matrix metal with traces of flux or deoxidizer, and alloying elements. All percentages given are pre-application ratios.
摘要翻译： 表面硬化组合物包含至少60重量％的硬质金属颗粒，其包括一定数量的烧结碳化物颗粒和一定数量的碳化物颗粒。 铸态和烧结碳化物选自由铬，钼，铌，钽，钛，钨和碳化钒组成的碳化物和合金及其混合物。 耐磨组合物的平衡是具有助焊剂或脱氧剂痕量的基质金属和合金元素。 所有给出的百分比是应用前比例。
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公开(公告)号：US5542485A
公开(公告)日：1996-08-06
申请号：US373149
申请日：1995-01-17
CPC分类号： E21B17/1092 , E21B10/16 , E21B10/52
摘要： An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a cutter shell surface including a gage surface and a heel surface. A plurality of cutting elements inserts are arranged in generally circumferential rows on the cutter. At least one chisel-shaped cutting element is secured to the gage surface. The chisel-shaped cutting element has a pair of surfaces converging to define a circumferential crest and is tilted toward the heel surface such that a line drawn through the center of the cutting element and its crest defines an acute angle of between about 15 and 75 degrees with the gage surface of the cutter.
摘要翻译： 钻头具有一个位体，并且至少一个切割器可旋转地固定到钻头体上。 切割器具有包括表面和跟部表面的切割器外壳表面。 多个切割元件插入件在切割器上大致圆周排布置。 至少一个凿状切割元件被固定到计量表面上。 凿状切割元件具有会聚的一对表面以限定圆周的顶部并且朝向跟部表面倾斜，使得通过切割元件及其顶部的中心绘制的线限定在大约15至75度之间的锐角 与刀具的表面。
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公开(公告)号：US5351769A
公开(公告)日：1994-10-04
申请号：US76029
申请日：1993-06-14
CPC分类号： E21B10/50
摘要： An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a plurality of teeth formed integrally thereon and arranged in circumferential rows. Each of the teeth includes an inner end, an outer end, a pair of flanks and a crest substantially transversely connecting the ends and flanks. The crests of the at least one of the plurality of teeth has a depression formed therein that extends from the outer end of the tooth to an intermediate point along the crest, a remainder of the crest defines a raised crest portion. A wear-resistant material is applied over at least the crest and a portion of at least the ends and flanks of the at least one of the plurality of teeth, wherein the thickness of the wear-resistant material over the depression is substantially greater than elsewhere on the tooth.
摘要翻译： 钻头具有一个位体，并且至少一个切割器可旋转地固定到钻头体上。 切割器具有多个整体形成在其上并以圆周排布置的齿。 每个齿包括内端，外端，一对侧面和基本上横向连接端部和侧面的波峰。 所述多个齿中的至少一个齿的顶部具有形成于其中的凹陷，所述凹陷从所述齿的外端延伸到沿所述顶部的中间点，所述顶部的其余部分限定凸起的顶部。 耐磨材料至少施加在多个齿的至少一个齿的至少顶端和至少一个端部和侧面的一部分上，其中耐磨材料在凹陷上方的厚度基本上大于其它部分 在牙齿上
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公开(公告)号：US5351768A
公开(公告)日：1994-10-04
申请号：US89318
申请日：1993-07-08
CPC分类号： E21B17/1092 , E21B10/16 , E21B10/52
摘要： An earth-boring bit has a bit body and at least one cutter rotatably secured to the bit body. The cutter has a cutter shell surface including a gage surface intersecting a heel surface. A plurality of hard metal inserts are arranged in generally circumferential rows on the cutter and include a heel row of heel inserts on the heel surface of the cutter and a gage row of gage inserts on the gage surface of the cutter. At least one scraper insert, formed of material more wear-resistant than that of the cutter shell surface, is secured to the cutter shell surface generally at the intersection of the gage and heel surfaces. The scraper insert includes a gage and a heel insert surface. The gage and heel surfaces of the scraper insert converge to define a cutting edge for engagement with the sidewall of the borehole, the insert surface defining a positive rake angle with respect to the sidewall of the borehole of between 0 and 15 degrees. The cutting edge projecting from the heel surface an amount not greater than the lesser of one-half the projection of the heel inserts from the heel surface and 30% of the pitch between the heel inserts.
摘要翻译： 钻头具有一个位体，并且至少一个切割器可旋转地固定到钻头体上。 切割器具有切割器外壳表面，其包括与跟部表面相交的计量表面。 多个硬金属插入件在切割器上大致圆周排布置，并且包括在切割器的跟部表面上的跟部插入物的后跟行和在切割器的计量表面上的量规插入件的一排。 至少一个由比刀具表面更耐磨的材料形成的刮刀插入件通常在量规和跟部表面的交叉处固定到刀具壳体表面。 刮刀插入件包括量具和跟部插入表面。 刮刀插入件的表面和跟部表面会聚以限定用于与钻孔的侧壁接合的切割边缘，插入表面相对于钻孔的侧壁在0和15度之间限定正的前角。 从后跟表面突出的切割刃不大于后跟插入物从后跟表面的一半的突起中的较小者和脚后跟插入物之间的间距的30％的量。
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公开(公告)号：US5119714A
公开(公告)日：1992-06-09
申请号：US662935
申请日：1991-03-01
IPC分类号： B22F7/06 , E21B10/52 , E21B10/56 , E21B10/567 , E21B10/62
摘要： In an improved earth boring bit of the type having one or more rotable cones secured to bearing shafts, an improved cutting structure having diamond filled compacts used as a wear resistant inserts. The improved compacts have hard metal jackets and integrally formed diamond cores. The improved compacts are advantageously used as gage and heel row compacts when inserted in mating recesses provided on the exteriors of the rotatable cones.
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