Gas assisted downhole pump

1. An artificial lift system in a wellbore extending from the surface to a reservoir having reservoir fluids, comprising:

a gas lift system including a first tubing string configured to inject a pressured gas from the surface through said first tubing string into the reservoir to commingle with and lift the reservoir fluids toward the surface through said first tubing string;

a packer;

a downhole system including a second tubing string adapted to pump reservoir fluids from said first tubing string to the surface; and

a casing having said packer mounted therein, said casing surrounding said first tubing string and said second tubing string in the wellbore,

wherein said first tubing string being sealingly engaged with said packer and configured to provide said pressured gas to commingle with and lift the reservoir fluids from below said packer to above said packer, and said second tubing string configured to pump the reservoir fluids above said packer to the surface,

wherein a portion of said first tubing string contains an inner tubing string that has a first end nearest the surface and a second end farthest from the surface,

wherein said inner tubing string is configured to move pressured gas from said first tubing string toward the reservoir,

wherein said first tubing string and said inner tubing string extend through said packer,

wherein said first end is located above said packer and below the surface,

wherein said second end is located below said packer,

wherein a space between the first tubing string and the inner tubing string forms an annulus configured to move the commingled pressured gas and reservoir fluids away from the reservoir while the pressured gas is moved toward the reservoir,

wherein said first end is connected with said first tubing string with an annular isolation device configured to block said annulus,

wherein said second end is in fluid communication with said annulus, and

wherein said first tubing string comprises an opening below said annular isolation device and above said packer that is configured to allow communication between the wellbore and said annulus and the passing of the commingled pressured gas and reservoir fluids through said opening.

2. The artificial lift system of claim 1 , wherein said gas lift system includes a gas flowline connected to said first tubing string, and a source of the pressured gas connects to a surface tank and said gas flowline contains a valve controlling the passage of the pressured gas into said first tubing string.

3. The artificial lift system of claim 1 , wherein said first tubing string further includes an internal gas lift valve configured to prevent pressured gas from the surface from moving through said inner tubing string unless a pressure in said first tubing string exceeds a predetermined value.

4. The artificial lift system of claim 1 , wherein said second tubing string contains a downhole pump configured to pump at the same time pressured gas is injected through said first tubing string.

5. The artificial lift system of claim 1 , wherein there is included a compressor system connected to said gas lift system configured to introduce the pressured gas to said first tubing string and recirculate at least a portion of the pressured gas between the surface and the reservoir.

6. The artificial lift system of claim 5 , wherein said gas lift system is configured to apply an intermittent back pressure on the reservoir.

7. The system of claim 1 , wherein said annular isolation device is a bushing.

8. The system of claim 1 , wherein said opening is in a perforated sub.

9. The system of claim 1 , wherein said second end is located in the reservoir.

10. The system of claim 1 , wherein said second tubing string has an end in the wellbore, and

wherein said opening is located adjacent to said second tubing string end.

11. An artificial lift system for use in a deviated wellbore extending from the surface into the earth and having reservoir fluids and a pressured gas source, comprising:

a casing in the wellbore;

a gas lift system configured to inject a pressured gas from the surface through a first tubing string to commingle with and lift the reservoir fluids toward the surface in said first tubing string;

a downhole pump adapted to pump reservoir fluids from said first tubing string through a second tubing string to the surface; and

a packer disposed between said first tubing string and said casing, wherein said first tubing string extending through said packer and said second tubing string not extending through said packer;

wherein a portion of said first tubing string contains an inner tubing string that has a first end nearest the surface and a second end farthest from the surface,

wherein said inner tubing string is configured to move pressured as said first tubing string toward the reservoir,

wherein said inner tubing string extends through said packer,

wherein said first end is located above said packer and below the surface,

wherein said second end is located in the reservoir,

wherein a space between the first tubing string and the inner tubing string forms an annulus configured to move the commingled pressured gas and reservoir fluids away from the reservoir while the pressured gas is moved toward the reservoir,

wherein said first end is connected with said first tubing string with a bushing configured to block said annulus,

wherein said second end is in fluid communication with said annulus, and

wherein said first tubing string comprises an opening below said bushing and above said packer that is configured to allow communication between the wellbore and said annulus and the passing of the commingled pressured gas and reservoir fluids through said opening.

12. The artificial lift system of claim 11 , wherein said gas lift system is configured to recirculate at least a portion of the pressured gas between the surface and a reservoir.

13. The system of claim 11 , wherein said opening is in a perforated sub.

14. The system of claim 11 , wherein said second tubing string has an end in the wellbore, and

wherein said opening is located adjacent to said second tubing string end.

15. A method for producing a reservoir fluid including reservoir liquid from a deviated wellbore originating at the earth's surface, comprising the steps of:

injecting a pressured gas from the surface through a first portion of a first tubing string extending from the surface into the wellbore and then through a second portion of the first tubing string extending through a packer disposed in a casing into the reservoir, wherein said second portion of the first tubing string contains an inner tubing string having a first end that is in the wellbore above said packer and below the surface and a second end that is in the reservoir;

moving the pressured gas through the inner tubing string after moving the pressured gas through said first portion of the first tubing string,

isolating a second tubing string from the reservoir with said packer;

commingling the pressured gas with the reservoir fluid to be lifted;

lifting the commingled pressured gas and reservoir fluid through an annulus between the first tubing string and the inner tubing string and through the packer away from the reservoir using the pressured gas while the pressured gas is simultaneously moved through the inner tubing string toward the reservoir;

blocking the commingled pressured gas and reservoir fluid in said annulus above said packer and below the surface;

redirecting the blocked commingled pressured gas and reservoir fluid through an opening located in the first tubing string above said packer and below the surface that allows communication between the wellbore and said annulus;

separating the pressured gas and reservoir liquid above the packer and in the wellbore; and

pumping the reservoir liquid from the first tubing string to the surface through the second tubing string during the step of injecting.

16. The method of claim 15 , further comprising the step of:

recirculating at least some of the pressured gas back through said first tubing string from the surface into the wellbore.

17. The method of claim 15 , wherein said first end of the inner tubing string is connected with the first tubing string above the packer and below the surface with an annular isolation device.

18. The method of claim 17 , wherein said annular isolation device is a bushing.

19. The method of claim 18 , wherein said step of blocking is performed with said bushing.

20. The method of claim 19 , wherein said opening is in a perforated sub.

21. The system of claim 19 , wherein said second tubing string has an end in the wellbore, and

wherein said opening is located adjacent to said second tubing string end.

22. The method of claim 19 , wherein said step of pumping is performed with a downhole pump.

23. The method of claim 22 , wherein said opening is adjacent to said downhole pump.