Patent ID: 7857043

Claim:
A rod rotator comprising of two parts, a) a base plate attached to a well-head stuffing box and b) an upper assembly attached to a polished rod, both parts having docking surfaces for periodic docking and undocking; wherein the upper assembly comprises: a body with a plurality of spiral slots in the interior that contain rotatable rollers; wherein the body is hollow and contains a rod rotator with horizontal holes, wherein the rollers engage in the spiral slots; wherein the connection between the upper assembly and the polished rod is made of toothed cotters that are clamped by a bolted plate between the polished rod and the rotator allowing the rotator to move up and down inside the hollow body; a cap screw in the hollow body that screws onto a threaded part of the upper end of the body; and a bottom with a central hole and a spring which is located between the bottom and the rotator.