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    • 3. 发明授权
    • Drilling apparatus
    • 钻孔设备
    • US06959774B2
    • 2005-11-01
    • US10428495
    • 2003-05-02
    • Alan L. Nackerud
    • Alan L. Nackerud
    • E21B20060101E21B7/18E21B7/28E21B10/32E21B10/34E21B10/62E21B10/66
    • E21B10/32E21B10/345
    • A drilling apparatus for earth boring operations is of the type having cutter blades mounted on a support body at the lower end of a drill string and includes a novel arrangement of fluid bore sections for delivering fluid under pressure into fluid discharge passages in each of the blades and a bifurcated pivotal mounting portion on the body which enables the bore sections to supply fluid to the cutter blades through a ball joint on the pivotal axis. Modified forms of invention are specifically designed for cutter blades which are intended to perform reaming operations but include the fluid delivery system as well as an extended delivery system for delivering fluid under pressure to other tools in the drill string.
    • 用于钻孔操作的钻孔设备是具有安装在钻柱下端的支撑体上的切割刀片的类型,并且包括用于将压力下的流体输送到每个叶片中的流体排放通道的流体孔部分的新颖布置 以及在主体上的分叉枢转安装部分,其使得孔部分能够通过枢转轴线上的球窝接头向切割刀片提供流体。 本发明的修改形式被专门设计用于旨在执行扩孔操作但包括流体输送系统的切割刀片,以及用于将压力下的流体输送到钻柱中的其它工具的延伸输送系统。
    • 4. 发明授权
    • Retention of cutters in bore hole tools
    • 刀孔保留在钻孔工具中
    • US08978790B2
    • 2015-03-17
    • US13135015
    • 2011-06-23
    • Alan L. Nackerud
    • Alan L. Nackerud
    • E21B10/573E21B10/32
    • E21B10/32E21B10/573
    • A cutter retention method which uses brazed material placed in cutter pockets and cutter pocket grooves or recesses to allow braze material between the cutters and cutter pockets and in said grooves and overlapping onto the top of the cutters to better retain the cutters in the cutting bore hole tool apparatus for enhanced cutter retention and extended drilling or boring time of drill bits, underreamers, section mills hole openers, casing cutters or other down hole tools used in bore hole drilling and completion operations.
    • 一种切割器保持方法,其使用放置在切割器凹穴中的钎焊材料和切割器凹槽或凹槽,以允许在切割器和切割器凹穴之间以及所述凹槽中的钎焊材料并且重叠到切割器的顶部上以更好地将切割器保持在切割钻孔中 用于增加刀具保持力的工具装置,以及用于钻孔和完井操作中的钻头,扩孔器,分段磨机开孔器,套管切割器或其他井下工具的延长钻孔或钻孔时间。