Patent ID: 6883606

Claim:
In a production system for producing oil or gas from a well, the production system including a plunger in well tubing having a first pressure, the well tubing connected to a plunger lubricator, which in turn is connected to a sales line having a second pressure, and a motor valve in the sales line, a differential pressure controller system comprising: a. a plunger arrival sensor; b. a differential pressure controller receptive to signals from the plunger arrival sensor and receptive to signals from pressure transducers to create a measured differential pressure across the motor valve, and having firmware that measures the time from when the motor valve closes until the time when the measured differential pressure across the motor valve equals a predetermined differential pressure set point, to create a recovery time of the well; and that uses the recovery time of the well to proportionately adjust the time that the motor valve remains open after the plunger arrival sensor is tripped; c. a first pressure transducer conductively coupled to the differential pressure controller, and adapted for measuring the first pressure; and d. a second pressure transducer conductively coupled to the differential pressure controller, and adapted for measuring the second pressure.