IMPROVED DRUM SHAFT BUSH EXTENSION TO ENHANCE DRAW WORK'S DRUM SHAFT IN OIL RIG

摘要

This invention relates to an improved drum shaft bush extension to enhance draw work"s drum shaft in oil rig comprising: a stainless steel bush (1) inserted into the hollow bore (4) of a drum shaft (2) on drilling the opening end of the shaft matching with outside diameter of the bush (1) and adapted with the shaft by threading (6); welding at the open face (3) of the shaft in the threading between the matching inner surface of the drum shaft and outside surface of the bush (1) thus providing a secured leak proof attachment for connectivity of the drum shaft with related jointed connecting parts of a rig while in operation.