Patent ID: 6021849
Filing Date: 2000-02-08
Classification: E21B,F04F

Abstract:
An artificial lift system for use in a wellbore comprising:a first chamber having an inlet and an outlet;a second chamber having an inlet and an outlet;a power gas string connected to said first and second chambers;a liquid string connected to said outlets of said first and second chambers;a venting means connected to said first and second chambers, said venting means for selectively allowing a gas to pass outwardly from said chamber;a compressor means connected to said power gas string, said compressor means for passing a pressurized gas into said power gas string;a valve means connected to said power gas string and to said first and second chambers, said valve means for selectively allowing the pressurized gas to enter said first and second chambers so as to cause any liquid in said first and second chambers to pass through the respective outlets of said first and second chambers and into said liquid string such that the liquid extends continuously along said liquid string, said valve means connecting said power gas string to said first chamber such that said valve means selectively passes the pressurized gas from said power gas string into said first chamber, said valve means connecting said power gas string to said second chamber such that said valve means selectively passes the pressurized gas from said power gas string into said second chamber, said first chamber positioned interior of said second chamber.