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    Drill bit inserts with variations in thickness of diamond coating
    2.
    发明授权
    Drill bit inserts with variations in thickness of diamond coating 有权
    钻头刀片，金刚石涂层厚度变化

    公开(公告)号：US06460636B1

    公开(公告)日：2002-10-08

    申请号：US09465631

    申请日：1999-12-17

    申请人： Zhou Yong ,  Suprant J. Huang ,  Nathan R. Anderson ,  J. Daniel Belnap ,  Chris E. Cawthorne ,  Ronald K. Eyre ,  Madapusi K. Keshavan ,  Per I. Nese ,  Michael A. Siracki ,  Gary R. Portwood

    发明人： Zhou Yong ,  Suprant J. Huang ,  Nathan R. Anderson ,  J. Daniel Belnap ,  Chris E. Cawthorne ,  Ronald K. Eyre ,  Madapusi K. Keshavan ,  Per I. Nese ,  Michael A. Siracki ,  Gary R. Portwood

    IPC分类号： E21B1046

    CPC分类号： E21B10/5673 ,  E21B10/56 ,  E21B10/573 ,  E21B10/5735 ,  E21B17/1092

    摘要： A cutter element for use in a drill bit, comprising a substrate and a cutting layer. The substrate comprises a grip portion and an extension portion, where the grip portion has an insert axis and an extension portion including an interface surface having a first apex. The cutting layer is affixed to the interface surface and has a cutting surface having a second apex. The cutting layer is shaped such that when a plane passing through the first apex and lying parallel to the insert axis and normal to a radius from the insert axis, the plane divides the cutting layer into major and minor portions and the major portion has a major volume that is at least 60 percent of the total volume of said cutting layer. Alternative embodiments of the present invention include variations wherein the first and second apices do not coincide and wherein the interface surface of the substrate is not axisymmetric. Using these variations, cutter elements having sizeable variations in thickness are constructed.

    摘要翻译： 一种用于钻头的切割元件，包括基底和切割层。 基板包括握持部分和延伸部分，其中握持部分具有插入轴线和包括具有第一顶点的界面的延伸部分。 切割层固定在界面表面上并具有具有第二顶点的切割表面。 切割层被成形为使得当平面穿过第一顶点并且平行于插入轴线平行并且平行于插入轴线的半径时，该平面将切割层分成主要和次要部分，并且主要部分具有主要部分 体积为所述切割层的总体积的至少60％。 本发明的替代实施例包括其中第一和第二顶点不重合并且其中基底的界面不是轴对称的变型。 使用这些变型，构造了具有相当大的厚度变化的切割元件。

    Rock bit
    6.
    发明授权
    Rock bit 失效
    摇滚点

    公开(公告)号：US5485890A

    公开(公告)日：1996-01-23

    申请号：US416484

    申请日：1995-04-04

    申请人： Chris E. Cawthorne ,  Steve Peterson ,  Naresh J. Kar ,  Madapusi K. Keshavan

    发明人： Chris E. Cawthorne ,  Steve Peterson ,  Naresh J. Kar ,  Madapusi K. Keshavan

    IPC分类号： E21B10/22 ,  E21B10/25

    CPC分类号： E21B10/25

    摘要： A rock bit for drilling subterranean formations has an improved dynamic O-ring seal for retaining lubricant around the rock bit bearings during operation of the rock bit. Such a bit has a plurality of journal pins, each having a bearing surface, and a cutter cone mounted on each journal pin and including a bearing surface. A grease reservoir is in communication with such bearing surfaces for maintaining grease adjacent to the bearing surfaces. The grease is sealed in with dynamic O-ring seals rotating against a sealing surface with a Vickers hardness of at least 1000 and vibratory burnished to have a surface finish in the range of from 5 to 32 microinches AA. Preferably, the sealing surface is formed on a seal ring interposed between the cone and journal. Preferably the sealing surface comprises a tungsten carbide composite sprayed onto the outside surface of a steel ring which is then welded to a journal.

    摘要翻译： 用于钻井地层的岩石钻头具有改进的动态O形密封圈，用于在岩石钻头操作期间将润滑剂保持在岩石钻头轴承周围。 这种钻头具有多个轴颈销，每个轴承销均具有一个支承表面，以及一个安装在每个轴销上并包括轴承表面的切割锥。 润滑脂储存器与这种支承表面连通，用于保持与轴承表面相邻的润滑脂。 润滑脂被密封，动态O型圈密封件旋转抵抗密封表面，维氏硬度至少为1000，振动磨光，表面光洁度为5至32微英寸AA。 优选地，密封表面形成在插入锥体和轴颈之间的密封环上。 优选地，密封表面包括喷涂在钢环的外表面上的碳化钨复合材料，然后焊接到轴颈上。