| 摘要 |
A tool (1) for clamping a saver sub assembly (32) of the drive shaft (31) of a top drive drilling machine (3), in which a tong (11), which is arranged to fixedly hold the saver sub assembly (32) by releasable abutment against a portion (321) of the saver sub assembly (32), is arranged on an upper portion (12a) of a frame (12) which, in a position of use, is rotationally rigidly fixed to and projects from a support (2), the frame (12) being provided with a through- going centre opening (211) arranged to receive a substantial portion of the saver sub assembly (32). A method of replacing a saver sub assembly (32) on the drive shaft (31) of a top drive drilling machine (3) is described as well. |
