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    • 3. 发明申请
    • Cutting element having enhanced cutting geometry
    • 具有增强的切割几何形状的切割元件
    • US20060237235A1
    • 2006-10-26
    • US11475448
    • 2006-06-27
    • Lance Richman
    • Lance Richman
    • E21B10/08
    • E21B10/5676
    • A drill bit that includes a bit body, at least one roller cone attached to the bit body and able to rotate with respect to the bit body, and a plurality of cutting elements disposed on the at least one roller cone is disclosed. At least one of the plurality of cutting elements includes a first area defining a trailing edge, a second area proximate the first area defining a main wear surface, and a third area proximate the second area and defining a leading edge relief zone. Further, an insert for a drill bit that includes a contact portion adapted to contact an earth formation, the contact portion including a first area defining a relieved trailing edge, a second area defining a main wear surface, and a third area proximate the second area and defining a leading edge relief zone. Further, including an insert for a drill bit wherein a surface of the second area is a curved surface having a radius of curvature substantially equal to a radius of a borehole is also disclosed.
    • 公开了一种钻头,其包括钻头体,附接到钻头体并能够相对于钻头体旋转的至少一个滚子锥体,以及设置在所述至少一个滚子锥体上的多个切割元件。 多个切割元件中的至少一个包括限定后缘的第一区域,接近限定主要磨损表面的第一区域的第二区域,以及接近第二区域的第三区域,并且限定前缘释放区域。 此外,一种用于钻头的插入件,其包括适于接触地层的接触部分,所述接触部分包括限定缓和后缘的第一区域,限定主要磨损表面的第二区域和邻近所述第二区域的第三区域 并定义前缘释放区。 此外,还公开了一种用于钻头的插入件,其中第二区域的表面是具有基本上等于钻孔半径的曲率半径的曲面。
    • 4. 发明申请
    • Bearing and lubrication system for earth boring bit
    • 地球钻头轴承和润滑系统
    • US20050077087A1
    • 2005-04-14
    • US10948664
    • 2004-09-23
    • Lance RichmanChris CawthorneKirk NorrisRobert Slaughter
    • Lance RichmanChris CawthorneKirk NorrisRobert Slaughter
    • E21B10/24E21B43/25F16C33/10F16N1/00
    • E21B10/24
    • Methods and apparatus for maintaining lubrication of rolling cone cutters mounted on journal pins. Embodiments comprise a rotating cone disposed on a journal pin and forming a journal gap there between. A cylindrical journal sleeve is disposed in the journal gap. The journal sleeve has a longitudinal gap forming opposing end portions, which are continuously contoured. A lubrication port is disposed in the journal pin and in fluid communication with a lubrication supply. The lubrication port has an outlet located in a recess in the journal gap. Each end of the recess comprises a transitioning surface extending between the bottom of the recess and the outer surface of the journal pin to prevent sharp transitions. In certain embodiments, the journal pin may comprise two or more lubrication ports, each located in a recess with transitioning surfaces.
    • 用于保持安装在轴颈销上的滚动锥形切割机的润滑方法和设备。 实施例包括设置在轴颈销上并在其间形成轴颈间隙的旋转锥体。 圆柱形轴颈套筒设置在轴颈间隙中。 轴颈套筒具有形成相对端部的纵向间隙,它们是连续成型的。 润滑口设置在轴颈销中并与润滑油流体连通。 润滑口具有位于轴颈间隙中的凹部中的出口。 凹槽的每个端部包括在凹部的底部和轴颈销的外表面之间延伸的过渡表面,以防止尖锐的过渡。 在某些实施例中,轴颈销可以包括两个或多个润滑端口,每个润滑端口位于具有过渡表面的凹部中。