Patent ID: 7080692
Filing Date: 2006-07-25
Classification: E21B,F04B

Abstract:
1. A method for the lifting of subterranean fluids in a well wherein said well has a first set of tubing with a first diameter and a second set of tubing with a second diameter which is larger than said first set of tubing first diameter, and said first set of tubing is connected to said second set of tubing by a taper, said method comprising the steps of: sending a first plunger down said well wherein said first plunger has a diameter which accommodates said first set of tubing first diameter; installing a plunger lift tool in said well second set of tubing above said taper creating a first stage below said plunger lift tool and a second stage above said plunger lift tool wherein said plunger lift tool comprises: sending said second plunger down said well wherein said second plunger has a diameter which accommodates said second set of tubing second diameter; creating pressure under said first plunger causing said first plunger and said subterranean fluids to lift up said well; passing said subterranean fluids through said plunger lift tool and said second plunger; and creating pressure under said second plunger causing said second plunger and said to subterranean fluids to lift to top of said well.