1. Pumping System Efficiency

4. Lower energy cost occurs with a master meter for several wells, but the operator usually is responsible for the poles and power lines past the master meter. Installation of single point individual meters are cheaper if the power company pays the cost. BUT, generally the operator and in de-regulation the operator pays installation cost, so a master meter is preferred. Could be 5% lower operating costs (~) if a master meter is used vs. single well meters? Master Meter for Several Wells vs. Single Well Power Metering

5. Master meters for a group of well give the company credit for regeneration of the motors when they act as generators. Single well meters with a rachet do not. However single well meters allow some measure of diagnostics for the well including the calculation of power efficiency:

8. What are typical Beam Losses? % 50-60 Good 40-50 Average 30-40 Poor -20 Bad

9. Efficiency Less Than 35%

10. Efficiency Greater Than 35%

12. DO TO MINIMIZE ENERGY COST ? Correctly match pumping requirements with wellbore inflow. Mechanically/Electrically balance pumping unit. On severely over sized motors where average efficiency falls below 65-70% change out motor. Add power factor correction capacitors to pumping unit motors. Properly size pumping unit to match well loads. Verify power meter calibration.

13. Efficiency Factors Transformers: S POC/Gas Interference: L Motors: S Belts and Sheaves: S Units: 50% Load: S Unit rotation: S Stroke Length: S-M Unit Balance: S-M Rod String Size: S-M Pump Size: L Pump Slippage: S Pump VE ( Gas Interference): L Setting Depth: S Tubing: S Runtime: S