| 20080202746 | Plunger Lift Controller and Method - An embodiment of a method of controlling a plunger lift system for a well, the plunger lift system having a tubing positioned in a cased well, a plunger in the tubing moveable from the bottom of the tubing to a top of the tubing, a control valve in functional connection with the tubing, a plunger arrival sensor, a tubing pressure sensor, a casing pressure sensor, and a sales line pressure sensor, a controller in operational connection with the control valve and functional connection with the sensors for receiving signals from the sensors, the method including the steps of: defining a threshold value for a trigger event, the trigger event initiating operation of the control valve by the controller; defining event-value conditions upon which adjustment of the trigger event is adjusted; determining, upon a calling-event, if the event-value conditions have been satisfied; and adjusting the trigger event threshold value upon satisfaction of the event-value conditions. | 08-28-2008 |
