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2. 发明授权

US4458764A Device in rock or earth drilling apparatus for rotary drilling 失效
标题翻译：用于旋转钻孔的岩石或泥土钻井设备中的装置
公开(公告)号：US4458764A
公开(公告)日：1984-07-10
申请号：US381439
申请日：1982-05-24
申请人： Eskil Lidstrand
发明人： Eskil Lidstrand
IPC分类号： E21B19/08 , E21B19/084 , E21B19/086 , E21B19/20 , E21C1/10
CPC分类号： E21B19/086 , E21B19/084 , E21B19/20
摘要： A device in rock or earth drilling apparatus for rotary drilling including an axially stationary chuck (21) and an axially movable chuck (27) which is rotated by a reversible pressure fluid driven rotary motor (32) having a pressure fluid supply conduit for each direction and which is moved forwards and backwards by a reversible pressure fluid driven feed motor (17) having a pressure fluid supply conduit (18, 19) for each direction, the chucks being actuated to withdraw from or insert in a drill hole a drill string (23) composed by a number of threaded string elements and (are also actuated) to make or break the joints between the string elements. One of the pressure fluid supply conduits (18 or 19) of the feed motor is connected to one of the pressure fluid supply conduits (37 or 36) of the rotary motor (32) via a conduit (100), so that when breaking or making the joint between two string elements gripped by the two chucks (21, 27) the feed motor will be actuated to move the axially movable chuck (27) relatively to the stationary chuck (21) in a direction to decrease the pressure on the threads accomplished by the weights of the axially movable chuck and devices (such as 32) connected thereto.A suitable illustration is FIG. 3.
摘要翻译：一种用于旋转钻井的岩石或泥土钻井设备中的装置，包括轴向固定的卡盘（21）和可轴向移动的卡盘（27），该卡盘通过可逆压力流体驱动的旋转马达（32）旋转，该可逆压力流体驱动旋转马达具有用于每个方向的压力流体供应管道并且其通过具有用于每个方向的压力流体供应管道（18,19）的可逆压力流体驱动进给马达（17）向前和向后移动，卡盘被致动以从钻孔中撤出或插入钻柱（ 23）由多个螺纹弦元件组成，并且（也被致动）以形成或断开弦元件之间的接合部。进给马达的一个压力流体供应管道（18或19）经由管道（100）连接到旋转马达（32）的压力流体供应管道（37或36）中的一个，从而当破碎或使得由两个卡盘（21,27）夹紧的两个弦线元件之间的接合将致动进给马达，以沿着减小螺纹上的压力的方向相对于固定卡盘（21）移动可轴向移动的卡盘（27）通过可轴向移动的卡盘的重量和与其连接的装置（例如32）实现。合适的图示是图1。 3。

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