| 摘要 |
A method and apparatus for facilitating connecting or disconnecting a first member to a second member, such as drill pipe used in the construction of an oilwell, the apparatus comprising a frame (110) and first and second engaging assemblies (120,140), each having three movable die carriers (127a,b,c) and powered movement apparatus for moving the die carriers (127a,b,c) simultaneously and in synchronisation. |
