New hydraulic pumping unit has unique control system
A new high volume, high capacity sucker rod pumping unit that uses a cable and counterweight lifting mechanism activated by a servo-controlled hydraulic system has been developed. Infinitely variable control of hydraulic power fluid at any point in the pumping cycle allows up and down strokes to be tailored to the most economic pumping pattern for minimizing rod stress and for balancing prime mover power input. A prototype unit has been under test for over 4 yr in the S. Monterey field, 20 miles south of Ferriday, La. Advantages claimed for the patented unit are (1) ability to balance power input during pumping cycle to minimize prime mover requirements; (2) units can be designed for long strokes and polish rod loads of 45,000 lb, or more; (3) unit can be skidded aside for servicing the well; and (4) safety features operate throughout the hydraulic system for maximum control during rod parting or equipment failures. Schematic drawings are utilized to present the details of the new system.
- OSTI ID:
- 6663887
- Journal Information:
- World Oil; (United States), Journal Name: World Oil; (United States) Vol. 177:7; ISSN WOOIA
- Country of Publication:
- United States
- Language:
- English
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