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    • 1. 发明申请
    • A WELL TRACTOR DRIVE SECTION WITH PAIRS OF DRIVE ARM BEARINGS MUTUALLY OPPOSITELY DISPLACED FROM THE CENTRE LINE
    • 一个良好的拖拉机驱动器部分,带有一对驱动臂轴承,通常会从中心线错位地移动
    • WO2017138817A1
    • 2017-08-17
    • PCT/NO2017/050030
    • 2017-02-02
    • C6 TECHNOLOGIES AS
    • ARMSTRONG, KEnny
    • E21B23/14
    • E21B23/14
    • A well tractor drive section comprising - a drive section body (0) with main central axis (0x), with - first and second drive wheels (10A, 10B) on the outer ends of first and second wheel arms (12A, 12B); - inner ends of said wheel arms (12A, 12B) arranged pivotally about first and second transverse axes (8Ax, 8Bx) in first and second transverse-axial wheel arm bearings (14A, 4B) for said wheel arms (12A, 12B) to rotate in a direction away from said main axis (0x) to engage said drive wheels (10A, 10B) with an inner wall of a well; - said first and second transverse-axes (8Ax, 8Bx) being mutually oppositely laterally displaced with a first separation (d1) from said main central axis (0x) in a common perpendicular plane (8P) relative to said main central axis (0x).
    • 包括 - 具有主中心轴线(0x)的驱动部分主体(0), - 第一和第二驱动轮(10A,10B)位于第一和第二 轮臂(12A,12B); - 所述轮臂(12A,12B)的内端在所述轮臂(12A,12B)的第一和第二横向 - 轴向轮臂轴承(14A,4B)中围绕第一和第二横向轴线(8Ax,8Bx) 沿远离所述主轴线(0x)的方向旋转以使所述驱动轮(10A,10B)与井的内壁接合; - 所述第一横向轴线(8Ax,第二横向轴线8Bx)相对于所述主中心轴线(0x)在相同的垂直平面(8P)中与所述主中心轴线(0x)以第一间距(d1)相互对置地横向移位,