Well pump control system
A motor control system is described for a well pump system comprising: a support member; a rocking member having first and second ends and a center pivotally mounted on the support member; a reciprocating member having first and second opposing ends, the first end operatively connected to the first end of the rocking member; a down-hole pump connected to the second end of the reciprocating member; a load cell operatively connected between the first and second opposing ends adjacent to the first end of the reciprocating member for producing dc signals indicative of actual loads being imposed on the reciprocating member during the return and pump stroke portions of an operating cycle; a counterbalance crank operatively connected to the second end of the rocking member; a motor operatively connected to the counterbalance crank for cycling the counterbalance crank through a reciprocating member return and pump stroke cycle; and a well pump control means operatively connected to the motor for varying the frequency of the voltage applied to the motor as a function of the difference between the dc signals of the load cell and a preselected compession level indicating dc signal during the rod return portion of the operating cycle.
- Assignee:
- Claude C. Freeman, Lubbock, TX
- Patent Number(s):
- US 4661751
- OSTI ID:
- 6591569
- Country of Publication:
- United States
- Language:
- English
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