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    • 5. 发明授权
    • Air-operated self-propelling rotary-percussive downhole drill
    • 气动自行式旋转冲击式井下钻机
    • US4209070A
    • 1980-06-24
    • US868464
    • 1978-01-10
    • Boris V. SudnishnikovVeniamin V. KamenskyEduard P. VarnelloSergei K. TupitsynBoris V. Nazarov
    • Boris V. SudnishnikovVeniamin V. KamenskyEduard P. VarnelloSergei K. TupitsynBoris V. Nazarov
    • E21B4/14E21B4/16E21B4/18E21B1/06
    • E21B4/18E21B4/14E21B4/145E21B4/16
    • The drill has a housing receiving therein a reciprocating striker, effecting percussive action upon the tool for breaking the rock at the face of the hole, mounted at the forward part of the housing, and upon the housing itself for propelling the drill in the hole. The housing also receives therein a mechanism for rotating the tool, including a self-controlled coupling provided with a movable sleeve and a stationary sleeve and adapted to transmit a torque to the tool in only one direction of rotation. The drill is provided with a device preventing a rearward motion of the housing and its rotation during a drilling operation. The drill is characterized by having a return device for retracting the tool from the face after it has been struck by the striker. The return device includes a piston mounted on the tail portion of the tool and mounted intermediate the striker and the forward bottom of the housing, a piston space defined between the piston and the forward bottom of the housing and a resilient member accommodated in this space and cooperating with the piston.
    • 该钻具具有容纳往复式撞击器的壳体,该装置对该工具进行敲击作用,用于破坏安装在该壳体前部的孔的表面处的岩石,以及该壳体本身用于将该钻头推进孔中。 壳体还容纳有用于旋转工具的机构,包括设置有可移动套筒和静止套筒的自我控制联接器,并且适于仅在一个旋转方向上将扭矩传递到工具。 该钻具设有防止壳体向后运动及其在钻孔操作期间的旋转的装置。 该钻头的特征在于具有一个返回装置,用于在被撞击器撞击之后将工具从该表面收回。 所述返回装置包括安装在所述工具的尾部上并安装在所述撞针和所述壳体的所述前底部之间的活塞,限定在所述活塞和所述壳体的所述前底部之间的活塞空间以及容纳在所述空间中的弹性构件, 与活塞配合。