Claims
- 1. 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 first chamber arranged in parallel spaced relationship to said second chamber, said first chamber having a volume approximately equal to a volume of said second 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; a vent in valved communication with said first chamber and with said second chamber, said vent being in valved communication with said liquid string at a location above said first and second chambers, said vent adapted to pass a vented gas from said first and second chambers and into said liquid string; a compressor connected to said power gas string and adapted to pass a pressurized gas into said power gas string; 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 chamber and said second chamber so as to cause a liquid in said first chamber to pass through said outlet of said first chamber and into said liquid string and to cause a liquid in said second chamber to pass through said outlet of said second chamber and into said liquid string.
- 2. The system of claim 1, said vent having a check valve connected to said liquid string, said check valve adapted to pass a portion of the vented gas into said liquid string, said vent adapted to pass a remaining portion of the vented gas into the well bore.
- 3. The system of claim 1, said valved communication between said vent and said liquid string being at a location at least 2500 feet above said chamber.
- 4. The system of claim 1, said compressor adapted to pass a pressurized gas of greater than 5,000 p.s.i. into said power gas string.
- 5. The system of claim 1, said liquid string having a liquid bypass extending around said valve.
RELATED APPLICATIONS
The present application is a continuation-in-part of U.S. application Ser. No. 09/339,482, filed on Jun. 24, 1999, and entitled “Gas Displaced Chamber Lift System Having a Double Chamber”, now U.S. Pat. No. 6,237,692. U.S. patent application Ser. No. 09/339,482 is a continuation-in-part of U.S. application Ser. No. 09/201,017, filed on Nov. 30, 1998, and entitled “Gas Displaced Chamber Lift System”, now U.S. Pat. No. 6,021,849.
US Referenced Citations (13)
Foreign Referenced Citations (3)
Number |
Date |
Country |
23 64 737 |
Jul 1975 |
DE |
570697 |
Aug 1977 |
RU |
1204-700 |
May 1986 |
RU |
Non-Patent Literature Citations (2)
Entry |
The Technology of Artificial Lift Methods. vol. 2a pp. 124-132. |
Otis Single and Dual-Acting Gas Pumps: To Enhance Artificial Lift Production for Light and Heavy Crude in Shallow and Deep Wells. Otis Engineering sales brochure. |
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
09/339482 |
Apr 1999 |
US |
Child |
09/405053 |
|
US |
Parent |
09/201017 |
Nov 1998 |
US |
Child |
09/339482 |
|
US |