TOP DRIVE DRILLING APPARATUS

摘要

A well drilling apparatus (10') (top drive) designed to be suspended from a travelling block (6') in a drawworks and laterally supported by a dolly (9') running together with the well drilling apparatus along tracks or rails fixed to a derrick. The drilling apparatus (10') comprises at least one driving motor (5'), one power transmission (4') powered by the at least one driving motor (5'), a drive shaft (70) 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 depending from the power transmission (4'). The load transferring means is in the form of a load frame module (1 ') that relieves the drive shaft (70) and the power transmission (4') at the same time as the load frame module (1') forms a central component module that the other main components of the well drilling apparatus are releasable connected to.