Print this pageAbstract: RotaFlex Efficiency and 
Balancing
MCCOY, JAMES, Echometer Company
The RotaFlex pumping unit has a unique geometry that results in a constant torque arm
on most of the upstroke and downstroke. Electrical generation throughout each pumping unit
cycle is minimized compared to a conventional unit. The geometry promotes high electrical
efficiencies. Balancing can be performed using power measurements, and the amount of
counterweight that must be added or removed from the weight box to balance the unit can be
calculated directly by software using the power data. Several field examples of efficiency
and balancing
tests are given to further describe the process and results.
AAPG Search and Discovery Article #90911©2000 AAPG Pacific Section and Western Region Society of Petroleum Engineers, Long Beach, California