05048610 is referenced by 28 patents and cites 11 patents.

A single bore packer is modified by a dual flow seal unit for gas lift completion. This permits the operator to inject lift gas into the upper casing annulus at the well head, bypass the hanger packer and conduct the lift gas into the suspended production tubing below the fluid level. The dual flow seal assembly is sealed internally against the packer mandrel, with the lift gas being conducted through a bypass flow passage between the seal mandrel and the packer mandrel, and being discharged into the lower casing annulus through a discharge port formed through the packer mandrel below the packer seal element package. The hang weight load of the production tubing is decoupled with respect to the packer seal elements by a set of internal ratchet slips which transfers the hang weight load from the packer mandrel onto the anchor slips and well casing at a location below the seal element package.

Title
Single bore packer with dual flow conversion for gas lift completion
Application Number
7/491463
Publication Number
5048610
Application Date
March 9, 1990
Publication Date
September 17, 1991
Inventor
Carter R Young
Dallas
TX, US
Ross M McCurley
Flower Mound
TX, US
Richard M Sproul
Grapevine
TX, US
Colby M Ross
Carrollton
TX, US
Agent
Dennis T Griggs
Assignee
Otis Engineering Corporation
TX, US
IPC
E21B 33/129
E21B 43/16
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