The unique geometry of the RotaFlex pumping unit results in a constant torque arm (or torque factor) on most of the upstroke and downstroke. The geometry promotes high electrical efficiencies. These electrical efficiencies can be measured by comparing the work required to raise the produced liquids from the net liquid level depth to the work input to the system as electrical power. Also favorable for high electrical efficiencies is the minimized electrical generation of the RotaFlex pumping unit, when compared to conventional beam pump units. RotaFlex balancing can be performed using electrical power measurements, and the amount of counterweight that must be added or removed from the counterweight box to balance the unit can be calculated directly by software using the power measurements and RotaFlex data. Therefore, power balancing does not require knowledge of the weight of the counterweight box and the auxiliary weights as is required with conventional mechanical balancing. To describe and explain the proper procedure for determining electrical efficiency and balanced torque, an example of electrically balancing a RotaFlex pumping unit to the optimum efficiency is presented.

You can access this article if you purchase or spend a download.