Compact power swivel

摘要

A compact power swivel for well drilling rigs and the like, comprising a frame; a mounting bracket secured to the frame; a quill rotatable on an axis mounted to the bracket; a bull gear coaxially disposed on the quill for rotating the quill; a motor mounted to the bracket and including a shaft rotatable on an axis parallel to the quill axis; a spur gear coaxially disposed on the shaft and rotatable, therewith engaging the bull gear for rotating the bull gear and the quill thereby; a disc brake mounted to the bracket and co-operating with the shaft for controlling rotation of the shaft and the quill thereby; and a thrust bearing coaxially disposed on the quill and associated with the bracket, for permitting free rotation of the quill and for distributing to the bracket forces associated with displacement of the swivel.