Patent ID: 8006756
Filing Date: 2011-08-30
Classification: E21B

Abstract:
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.