Abstract: A vertical tensioning and anti-rotational device for use with a single continuous rope conveyor lifting system, the lifting system having a series of powered pulleys disposed at the top of a well for continuously driving a rope in a closed loop into the well, into and out of downhole fluids, and back to the top of the well, carrying a portion of such fluids out of the well. The device includes a tubular body open at one end, and a tension bar telescoped into the open end. The tubular body and tension bar member are adapted to fit diametrically into a well bore. A spring biases the tension bar member away from the tubular body. Extension bar members are disposed on the opposite ends of the tubular body and tension bar member, and extend longitudinally axially along the walls of the well bore. Sharp-edged rollers are disposed on the upper and lower ends of the extension bar members. The spring biases the rollers against the walls of the well bore, and the rollers prevent the device from rotating.