These power swivels boast at least 1,000 horsepower that turn a shaft to which the drill string is screwed. Replacing the traditional Kelly or rotary table, the top drive lessens the manual labor ...

iron roughnecks connect and disconnect drill pipe. Whether pipe is being fed into the wellbore or it is being taken out, the iron roughneck uses a rotary table and torque wrench(es) to make up or ...