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    • 7. 发明授权
    • Directional flow nozzle retention body
    • 定向流动喷嘴保持体
    • US06571887B1
    • 2003-06-03
    • US09547691
    • 2000-04-12
    • Quan V. NguyenJames L. LarsenMichael A. SirackiChris E. Cawthorne
    • Quan V. NguyenJames L. LarsenMichael A. SirackiChris E. Cawthorne
    • E21B1018
    • E21B10/61E21B10/18
    • A drill bit having one or more nozzle retention bodies attached by a single orientation mounting is disclosed, as is the associated method for its manufacture. The upper end of the nozzle retention body has a fluid inlet in communication with the internal fluid plenum of the drill bit, and the lower end of the nozzle retention body includes a fluid outlet that defines an exit flow angle. The exit flow angle is angularly disposed from the longitudinal axis of the drill bit. The nozzle retention body may advantageously be chamfered or the like to provide a reduced cross-sectional area at the lower end of the nozzle retention body. The outer surface of the nozzle retention body (and attached hardened elements) may extend substantially to gage, or may fall short of that diameter.
    • 公开了具有通过单个定向安装附接的一个或多个喷嘴保持体的钻头,以及其制造的相关方法。 喷嘴保持体的上端具有与钻头的内部流体通风室连通的流体入口,并且喷嘴保持体的下端包括限定出口流动角的流体出口。 出口流动角度与钻头的纵向轴线成角度地设置。 喷嘴保持体可以有利地被倒角等,以在喷嘴保持体的下端提供减小的横截面面积。 喷嘴保持体(和附着的硬化元件)的外表面可以基本上延伸到规定的范围内,或者可以不超过该直径。
    • 10. 发明授权
    • Dual functioning seal for rock bits
    • 岩石双重功能密封
    • US06170830B2
    • 2001-01-09
    • US09090448
    • 1998-06-04
    • Chris E. CawthorneSujian HuangZhigang FangMichael A. Siracki
    • Chris E. CawthorneSujian HuangZhigang FangMichael A. Siracki
    • F16J1534
    • E21B10/25F16J15/32F16J15/344Y10S277/91Y10S277/944
    • Dual functioning seals for use in forming a lubricant seal in a rotary rock bit comprise an annular elastomeric seal body having a dynamic seal surface for sealing against a dynamic surface and a static seal surface for sealing against a static surface. The seal body has an asymmetric axial cross-sectional geometry the dynamic seal surface having a greater radius of curvature than that of the static seal surface. The dynamic and static seal surfaces are formed from different elastomeric materials, and the dynamic seal surface is formed from an elastomeric material that is harder and more wear resistant than the elastomeric material used to form the static seal surface. A rotary rock bit seal constructed in this manner is well adapted to accommodate the different operating conditions and sealing requirements that exist both at the dynamic and static surfaces of the seal to ensure optimal seal performance and, thereby enhance the service life of the rock bit.
    • 用于在旋转岩石钻头中形成润滑剂密封件的双功能密封件包括环形弹性密封体,其具有用于密封动态表面的动态密封表面和用于密封静态表面的静态密封表面。 密封体具有不对称的轴向横截面几何形状,动态密封表面具有比静态密封表面更大的曲率半径。 动态和静态密封表面由不同的弹性体材料形成,并且动态密封表面由弹性体材料形成,弹性体材料比用于形成静态密封表面的弹性体材料更硬且更耐磨。 以这种方式构造的旋转岩石钻头密封圈非常适合于适应在密封件的动态和静态表面处存在的不同操作条件和密封要求,以确保最佳的密封性能,从而提高岩石钻头的使用寿命。