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    Predominantly diamond cutting structures for earth boring
    62.
    发明授权
    Predominantly diamond cutting structures for earth boring 失效
    主要用于钻孔的金刚石切割结构

    公开(公告)号：US6082223A

    公开(公告)日：2000-07-04

    申请号：US163499

    申请日：1998-09-30

    申请人： Gordon A. Tibbitts

    发明人： Gordon A. Tibbitts

    IPC分类号： E21B10/56 ,  E21B10/567 ,  E21B10/573 ,  E21B10/60 ,  B21K3/02

    CPC分类号： E21B10/5673 ,  E21B10/5735 ,  E21B10/60

    摘要： A diamond cutting element for use on an earth boring drill bit, such as a rotary drag bit. The cutting element is predominately comprised of a diamond cutting structure attached to either a reduced-volume substrate or directly to a bit body, optionally using a carrier structure mounted to the bit body. With such a configuration, stress between dissimilar materials, such as the substrate and the cutting structure, is reduced or entirely eliminated. Moreover, only the diamond cutting structure contacts the formation during drilling, resulting in lower friction, lower temperatures and lower wear rates of the cutting elements. The diamond cutting structure may also be polished and include one or more internal passageways that extend into the diamond through which fluids may be passed to transfer heat from the cutting element during drilling.

    摘要翻译： 用于钻孔钻头的钻石切割元件，例如旋转阻力钻头。 切割元件主要由连接到体积小的基底或直接连接到钻头体的金刚石切割结构组成，可选地使用安装到钻头体的载体结构。 通过这样的结构，可以减少或完全消除诸如基板和切割结构的不同材料之间的应力。 此外，仅钻石切割结构在钻孔期间接触地层，导致切割元件的较低的摩擦力，较低的温度和较低的磨损率。 金刚石切割结构还可以被抛光并且包括延伸到金刚石中的一个或多个内部通道，通过该金刚石，流体可以在钻孔期间从切割元件传递热量以传递热量。

    Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped
    64.
    发明授权
    Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped 失效
    超级磨料切割元件具有增强的耐用性和增加的磨损寿命，以及如此装备的装置

    公开(公告)号：US6000483A

    公开(公告)日：1999-12-14

    申请号：US005884

    申请日：1998-01-12

    申请人： Stephen R. Jurewicz ,  Kenneth M. Jensen ,  Gordon A. Tibbitts

    发明人： Stephen R. Jurewicz ,  Kenneth M. Jensen ,  Gordon A. Tibbitts

    IPC分类号： E21B10/56 ,  E21B10/567 ,  E21B10/46 ,  E21B10/58

    CPC分类号： E21B10/5673

    摘要： A cutting element for use in drilling subterranean formations. The cutting element includes a superabrasive table between about 0.070 inch and 0.150 inch thickness, mounted to a supporting substrate. The superabrasive table includes a two-dimensional cutting face having a cutting edge along at least a portion of its periphery, and a rake land extending forwardly and inwardly from the cutting edge at an angle of between about 10.degree. and 80.degree. to the longitudinal axis of the cutting element for a width, measured along the surface of the rake land, of not less than about 0.050 inch. The interface between the superabrasive volume and the substrate, taken to the rear of the cutting edge, is located no less than about 0.015 inch to the rear of the cutting edge.

    摘要翻译： 用于钻探地下地层的切割元件。 切割元件包括安装在支撑基底上的约0.070英寸和0.150英寸厚度的超级磨料台。 超研磨台包括具有沿着其周边的至少一部分的切割边缘的二维切割面，以及从切割刃向前和向内延伸的耙脊，其与纵向轴线成约10°至80°的角度 的切割元件，沿着耙脊的表面测量的宽度不小于约0.050英寸。 超出磨料体积和基材之间的接口位于切削刃的后部，位于切削刃后部不小于约0.015英寸。

    Rotary bit with gageless waist
    67.
    发明授权
    Rotary bit with gageless waist 失效
    带无齿腰带的旋转位

    公开(公告)号：US5740873A

    公开(公告)日：1998-04-21

    申请号：US550092

    申请日：1995-10-27

    申请人： Gordon A. Tibbitts

    发明人： Gordon A. Tibbitts

    IPC分类号： E21B10/54 ,  E21B10/55 ,  E21B10/60 ,  E21B17/10 ,  E21B10/26

    CPC分类号： E21B10/55 ,  E21B10/602 ,  E21B17/1092

    摘要： A drill bit, process of drilling, and method of manufacturing the same are provided wherein the drill bit has a bit body defining a radially extending waist and a plurality of cutting elements proximate the waist. The waist has an outer diameter less than an outer diameter defined by a plurality of outermost cutting elements. The difference in outer diameters between the waist and the outermost cutting elements is determined by the thickness of filter cake that forms on the wall of a wellbore, such that the waist of the bit does not contact the filter cake during the drilling process.

    摘要翻译： 提供了钻头，钻孔方法及其制造方法，其中钻头具有限定径向延伸的腰部的钻头体和靠近腰部的多个切割元件。 腰部具有小于由多个最外切割元件限定的外径的外径。 腰部和最外侧切割元件之间的外径差异由在井眼的壁上形成的滤饼的厚度确定，使得钻头的腰部在钻孔过程中不与滤饼接触。

    Earth boring drill bit with shell supporting an external drilling surface
    68.
    发明授权
    Earth boring drill bit with shell supporting an external drilling surface 失效
    地镗钻头与壳体支撑外部钻孔表面

    公开(公告)号：US5666864A

    公开(公告)日：1997-09-16

    申请号：US414624

    申请日：1995-03-31

    申请人： Gordon A. Tibbitts

    发明人： Gordon A. Tibbitts

    IPC分类号： B23P11/02 ,  E21B10/46 ,  E21B10/52 ,  B21K5/02

    CPC分类号： E21B10/52 ,  B23P11/025 ,  E21B10/46 ,  B22D19/06 ,  B22D19/14

    摘要： A method for making an earth boring drill bit which includes an outer shell having an external surface adapted to carry cutting elements and a unitary shank and bit core which is fitted into the outer shell. The shell and bit core are threadably engaged with one another or are interferingly engaged. The shell and bit core may be welded, secured with brazing alloys or with high temperature adhesives. In one embodiment, a ridge formed on the shank is received in a groove formed on an interior surface of the shell to prevent relative rotational movement of the shank and shell during drilling. In another embodiment, the shell is formed using matrix infiltration techniques. After the shell is formed, it is heated to braze cutters thereto. While still hot from the brazing process, the shell and shank are fitted together. After cooling the shell contracts to form heat shrink connection between the shell and the shank.

    摘要翻译： 一种用于制造钻孔钻头的方法，其包括具有适于承载切割元件的外表面的外壳和装配到外壳中的整体柄和钻头芯。 外壳和钻头芯彼此螺纹接合或者被干涉地接合。 外壳和钻头芯可以焊接，用钎焊合金或高温粘合剂固定。 在一个实施例中，形成在柄上的脊被容纳在形成在壳的内表面上的凹槽中，以防止在钻孔期间柄和壳的相对旋转运动。 在另一个实施方案中，使用基质渗透技术形成壳。 在形成壳体之后，将其加热以将切割器钎焊到其上。 虽然从钎焊过程仍然很热，外壳和柄部装配在一起。 冷却后壳体收缩以在壳体和柄部之间形成热收缩连接。

    Tilting bit crown for earth-boring drills
    70.
    发明授权
    Tilting bit crown for earth-boring drills 失效
    倾斜钻头，用于钻孔钻头

    公开(公告)号：US5595254A

    公开(公告)日：1997-01-21

    申请号：US462780

    申请日：1995-06-05

    申请人： Gordon A. Tibbitts

    发明人： Gordon A. Tibbitts

    IPC分类号： E21B7/06 ,  E21B7/08 ,  E21B10/00 ,  E21B17/04 ,  E21B17/05 ,  E21B17/20 ,  F16D3/24 ,  F16D3/44

    CPC分类号： E21B7/068 ,  E21B10/00 ,  E21B17/04 ,  E21B17/05 ,  E21B17/20 ,  E21B7/064 ,  F16D3/24 ,  F16D3/44

    摘要： A drill bit for drilling subterranean formations includes a device to provide a "universal" effect between the shank and crown for self alignment of the crown with the bore hole in the formation. The bit is suitable for down-hole assemblies configured for straight drilling, directional drilling and navigational drilling. The device can be incorporated into both drag bits and roller-type "rock" bits. Preferred embodiments include a flexible sub connecting the crown to the shank portion and having reduced stiffness relative to the drill string. Alternatively, a spherical universal joint or trunnion type universal is used. Replaceable lugs increase durability and reliability of the universal. The device equalizes the loads on cutters while reducing wear, average loads, and impact loads on cutters. Bore hole diameter and chatter of the bit in the bore hole are reduced, promoting maximum efficiency and rate of penetration as wobble and precession are minimized.

    摘要翻译： 用于钻探地下地层的钻头包括在柄和冠之间提供“通用”效应的装置，用于使冠部与地层中的钻孔自对准。 该钻头适用于直钻，定向钻井和导航钻孔的井下组件。 该装置可以并入拖曳位和滚子式“摇滚”位。 优选实施例包括将冠部连接到柄部分并且相对于钻柱具有降低的刚度的柔性子部分。 或者，使用球形万向接头或耳轴式通用型。 可更换的凸耳增加了通用的耐用性和可靠性。 该装置使刀具上的负载相等，同时减少刀具上的磨损，平均载荷和冲击载荷。 钻孔中的钻孔直径和钻头的颤动减小，从而在摆动和进动最小化的同时提高最大效率和穿透速度。