Cylindrical telescopic kelly-bar apparatus
    1.
    发明授权
    Cylindrical telescopic kelly-bar apparatus 失效
    圆柱伸缩式凯利棒设备

    公开(公告)号:US5263899A

    公开(公告)日:1993-11-23

    申请号:US534476

    申请日:1990-06-07

    摘要: A kelly-bar apparatus includes, for example, an inner kelly-bar, a second kelly-bar and an outer kelly-bar. These kelly-bars are relatively telescopically operable and torque is transmitted from outside to inside. When the second and outer kelly-bar are in a contracted position, they are supported by a spring on a spring support fixed to the inner kelly-bar. The bottom end of a torque transmitting projection of the inner kelly-bar is fitted into and welded to the spring support. The spring support is fixed onto an engagement member formed integrally with the inner kelly-bar. In addition, a stop member for preventing the second kelly-bar from coming away from the outer kelly-bar projects from the inner periphery of the outer kelly-bar at a location above the torque transmitting portion.

    摘要翻译: 凯尔酒吧装置包括例如内部凯利酒吧,第二凯利酒吧和外部凯利酒吧。 这些凯利杆相对可伸缩地操作,扭矩从外部传递到内部。 当第二和外部的凯利杆处于收缩位置时,它们由固定在内部凯利杆上的弹簧支撑件上的弹簧支撑。 内部凯利杆的扭矩传递突起的底端装配并焊接到弹簧支撑件上。 弹簧支撑件被固定到与内部凯利杆一体地形成的接合构件上。 此外,用于防止第二凯利杆离开外部凯利杆的止动构件在扭矩传递部分上方的位置从外部凯利杆的内周突出。