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    • 3. 发明申请
    • VARIABLE STIFFNESS DOWNHOLE TOOL HOUSING
    • 可变刚度卧式工具壳
    • US20150101800A1
    • 2015-04-16
    • US14401099
    • 2012-05-17
    • Chung ChangArthur ChengGary Kainer
    • Chung ChangArthur ChengGary Kainer
    • E21B47/01E21B49/08
    • E21B47/01E21B17/00E21B47/101E21B49/08G01V1/523
    • Various systems and methods for implementing and using a variable stiffness downhole tool housing include cylindrical segments positioned along a common axis, with a pair of segments each coupled to a bulkhead and positioned at either axial end of the tool housing. The housing also includes a flexible cylindrical sleeve, positioned along the common axis between two of the plurality of cylindrical segments, that includes a first and second region with an outer diameter no larger than a common segment inner diameter and a third region located between the first and second regions and with an outer diameter no larger than a common segment outer diameter (the first and second regions each at least partially inserted into an end of one segment). A stiffness controller controls the stiffness of the tool housing by controlling at least part of an axial force exerted between the two segments.
    • 用于实现和使用可变刚度井下工具壳体的各种系统和方法包括沿公共轴线定位的圆柱形段,其中一对段各自联接到隔板并且定位在工具壳体的任一轴向端。 壳体还包括柔性圆柱形套筒,沿着公共轴线定位在多个圆柱形段之间的两个之间,其包括具有不大于公共节段内径的外径的第一和第二区域,以及位于第一 和第二区域,并且具有不大于公共段外径(每个至少部分地插入一个段的末端的第一和第二区域)的外径。 刚度控制器通过控制施加在两个段之间的轴向力的至少一部分来控制工具壳体的刚度。