Differential pressure controller

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 method for efficiently producing oil or gas comprises the steps of:

• a. opening and closing the motor valve in the sales line in response to differential pressure measured between the first and second pressures,
• b. adjusting the timing and rate of the cycling of the plunger,
• c. measuring the time from when the motor valve closes until the time when the differential pressure set point is met, to create a recovery time of the well;
• and
• d. using the recovery time of the well to proportionately adjust the time that the motor valve remains open after a plunger arrival sensor is tripped.

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 method for efficiently producing oil or gas comprises the steps of:

• a. opening and closing the motor valve in the sales line in response to differential pressure measured between the first and second pressures, including the steps of:
• (i) measuring the time from when the motor valve opens until the time when a plunger arrival sensor is tripped, to create a plunger travel time;
• and
• (ii) using the plunger travel time to adjust a differential pressure set point for opening and closing the motor valve;
• b. adjusting the timing and rate of the cycling of the plunger;
• c. measuring the time from when the motor valve closes until the time when the differential pressure set point is met, to create a recovery time of the well;
• and
• d. using the recovery time of the well to proportionately adjust the time that the motor valve remains open after the plunger arrival sensor is tripped.