Gas displaced chamber lift system with closed loop/multi-stage vents

An artificial lift system for use in a well bore comprising:

• at least one chamber having an inlet and an outlet;
• a power gas string in valved communication with said chamber;
• a liquid string in valved communication with said outlet of said chamber;
• at least one vent in valved communication with said chamber, said vent adapted to pass a vented gas from said chamber;
• a compressor connected to said power gas string and adapted to pass a pressurized gas into said power gas string, said vent connected to said compressor and adapted to pass the vented gas into said compressor, said compressor having a first stage and a second stage and a third stage, said third stage connected to said power gas string, said vent connected to an inlet of said third stage;
• and
• a valve connected to said power gas string and to said chamber, said valve adapted to selectively allow the pressurized gas to enter said chamber so as to cause a liquid in said chamber to pass through said outlet of said chamber and into said liquid string.

An artificial lift system for use in a well bore comprising:

• a first chamber having an inlet and an outlet;
• a second chamber having an inlet and an outlet, said second chamber being arranged in parallel relation to said first chamber, said first chamber having a top end aligned in a horizontal plane with a top of said second chamber, said first chamber having a bottom end aligned in a horizontal plane with a bottom of said second chamber;
• a power gas string in valved communication with said first chamber and said second chamber;
• a liquid string in valved communication with said outlet of said first chamber and with said outlet of said second chamber;
• at least one vent in valved communication with said first chamber and with said second chamber said vent adapted to pass a vented gas from said first and second chambers;
• a compressor connected to said power gas string and adapted to pass a pressurized gas into said power gas string said vent connected to said compressor and adapted to pass the vented gas into said compressor;
• and
• a valve connected to said power gas string and to said first and second chambers said valve adapted to selectively allow the pressurized gas to enter said first and second chambers so as to cause a liquid in said first and second chambers to pass through the respective outlets of said first and second chambers and into said liquid string.

An artificial lift system for use in a well bore comprising:

• a first chamber having an inlet and an outlet;
• a second chamber having an inlet and an outlet, said second chamber arranged in parallel relation to said first chamber;
• a power gas string in valved communication with said first and second chambers;
• a liquid string in valved communication with said outlet of said first chamber and with said outlet of said second chamber;
• a first vent connected to said compressor and adapted to pass vented gas of a first pressure range from said first and second chambers into said compressor;
• a second vent adapted to pass vented gas of a second pressure range from said first and second chambers;
• a compressor connected to said power gas string and adapted to pass a pressurized gas into said power gas string;
• a valve connected to said power gas string and to said first and second chambers, said valve adapted to selectively allow the pressurized gas to enter said first and second chambers so as to cause a liquid in said first and second chambers to pass through the respective outlets of said first and second chambers and into said liquid string, said valve movable between a first position and a second position, said first position allowing pressurized gas into one of said first and second chambers while blocking pressurized gas from entering another of said first and second chambers, said second position allowing pressurized gas into said another of said first and second chambers while blocking pressurized gas from entering said one of said first and second chamber, said valve adapted to switch between said first and second vents relative to a pressure of the vented gas.

An artificial lift system for use in a well bore comprising:

• at least one chamber having an inlet and an outlet;
• a power gas string in valved communication with said chamber;
• a liquid string in valved communication with said outlet of said chamber;
• a multi-stage compressor connected to said power gas string and adapted to pass a pressurized gas of greater than 5,000 p.s.i. into said power gas string;
• a first vent in valved communication with each said chamber, said first vent connected to said multi-stage compressor and adapted to pass vented gas of a first pressure range from each said chamber and into said multi-stage compressor;
• a second vent in valved communication with each said chamber, said second vent adapted to pass vented gas of a second pressure range from each said chamber;
• and
• a valve connected to said power gas string and to said chamber, said valve adapted to selectively allow the pressurized gas to enter said chamber so as to cause a liquid in said chamber to pass through said outlet of said chamber and into said liquid string.