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    Drill bit inserts with variations in thickness of diamond coating
    1.
    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 with an extended center jet
    6.
    发明授权
    Rock bit with an extended center jet 失效
    岩石与一个扩展的中心喷气机

    公开(公告)号：US5853055A

    公开(公告)日：1998-12-29

    申请号：US671517

    申请日：1996-06-27

    申请人： Michael A. Siracki ,  Per I. Nese ,  Alan W. Lockstedt ,  Dennis Cisneros ,  Michael S. Oliver ,  Gary R. Portwood

    发明人： Michael A. Siracki ,  Per I. Nese ,  Alan W. Lockstedt ,  Dennis Cisneros ,  Michael S. Oliver ,  Gary R. Portwood

    IPC分类号： E21B10/16 ,  E21B10/18

    CPC分类号： E21B10/18 ,  E21B10/16

    摘要： A rotary cone bit for drilling bore holes in earth formations whose body has a thread pin end and a dome end from which extend three legs. A cutter cone is rotatably mounted to each leg and is radially oriented about the bit's central axis. Each cutter cone has a gage row of cutting elements extending from the cone surface nearest the mouth and a nose row extending nearest the cone's apex. A center jet for emitting fluid or mud is located on the dome. The jet has a converging nozzle with an exit orifice which extends below a predefined horizontal plane intersected by the cones or cutting elements. The exit orifice has a constant diameter for a length at least equal to its diameter for reducing the diffusion of the fluid or mud flow emitted. Fluid or mud emitted from the center jet travels substantially uninterrupted within a cylindrical space between the cones which is not invaded by any cutting element. This reduced diffusion substantially uninterrupted fluid flow strikes the bore hole bottom with maximum impact energy for enhanced removal of earth formation cuttings.

    摘要翻译： 一个用于在地层中钻孔的旋转锥形钻头，其主体具有螺纹针端和从其延伸三条腿的圆顶端。 切割锥体可旋转地安装到每个支腿上并且围绕钻头的中心轴线径向定向。 每个切割锥体具有从最接近嘴部的锥形表面延伸的切割元件的行列，以及最靠近锥体顶点延伸的鼻列。 用于喷射流体或泥浆的中心喷射器位于圆顶上。 喷射器具有会聚喷嘴，其具有出口孔，该出口孔延伸到与锥体或切割元件相交的预定水平面下方。 出口孔具有至少等于其直径的长度的恒定直径，用于减少发射的流体或泥浆流的扩散。 从中心射流发射的流体或泥浆在不被任何切割元件侵入的锥体之间的圆柱形空间内基本上不间断地行进。 这种减少的扩散基本上不间断的流体流动以最大的冲击能量撞击钻孔底部，以增强地球切屑的去除。