公开(公告)号：US5297833A

公开(公告)日：1994-03-29

申请号：US22235

申请日：1993-02-25

申请人： Clyde A. Willis ,  Clyde D. Durrett

发明人： Clyde A. Willis ,  Clyde D. Durrett

IPC分类号： E21B19/07 ,  E21B19/10 ,  E21B19/16 ,  B66C1/42 ,  B25B13/18

CPC分类号： E21B19/07 ,  E21B19/10 ,  E21B19/161

摘要： An apparatus for gripping a down hole tubular for support and rotation, or a string of such tubulars, includes a body element adapted to be rotated at high torques either by a top head drive or a rotary table of an earth drilling machine. Gripping elements are mounted in a central cavity of the body element, and each gripping element includes a lower gripping portion shaped to engage a tapered shoulder of a length of drill pipe to support the drill pipe and an upper gripping portion shaped to engage the tool joint of the drill pipe to rotate the drill pipe. First guides are secured between the body element and the lower gripping portions in the central cavity, and these first guides are oriented to approach one another toward a lower portion of the body element. Second guides are secured between the upper and lower gripping portions, and these second guides are oriented to approach one another at an acute angle with respect to the axis. Links are secured to the gripping elements such that initial downward movement of the links forces the lower gripping portions radially inwardly along the first guides and further downward movement of the links after the lower gripping portions have seated against the down hole tubular forces the upper gripping portions radially inwardly along the second guides. The disclosed apparatus serves as a combination elevator, make-up/break-out tong or wrench set, spinner, and drill string rotation mechanism. It is fully compatible with remote control and automation.

摘要翻译： 用于夹持用于支撑和旋转的井下管的装置或一串这种管状件包括适于通过地面钻孔机的顶部驱动装置或旋转台以高扭矩旋转的主体元件。 夹持元件安装在主体元件的中心空腔中，并且每个夹持元件包括下部夹持部分，其形状为接合钻杆长度的锥形肩部以支撑钻杆和形成为接合工具接头的上部抓握部分 的钻杆旋转钻杆。 第一引导件被固定在中心腔体的主体元件和下夹持部分之间，并且这些第一引导件被定向成朝着主体元件的下部彼此接近。 第二引导件固定在上部和下部抓握部分之间，并且这些第二引导件被定向成相对于轴线成锐角接近。 链节被固定到抓握元件，使得连杆的初始向下运动在下夹持部分抵靠着井筒的作用下使得下夹持部分沿第一引导件向内径向向内并进一步向下移动， 沿着第二导向件径向向内。 所公开的装置用作组合升降机，补充/分离钳或扳手组，旋转器和钻柱旋转机构。 它完全兼容远程控制和自动化。