| 摘要 |
A well drilling apparatus (10) (top drive) designed to be suspended from a travelling block (6) in a drawworks and laterally sup-ported by a dolly (9) running together with the well drilling apparatus along tracks or rails fixed to a derrick. The well drilling apparatus (10) comprises at least one driving motor (5), one power transmission (4) pow-ered by the at least one driving motor (5), a drive shaft (7) driven from the power transmission (4) and designed to be connected to a drill string, load transferring means, and a torque arresting device (3) fixed to and de-pending from the power transmission (4). At least a number of the above referred components of the well drilling apparatus (10) are designed and arranged as component modules, which by means of quick releasable con-necting means connect the individual components/modules together. |
