Method for protecting a carbon dioxide production well from corr

Details Method for protecting a carbon dioxide production well from corr Method for protecting a carbon dioxide production well from corr

1980-04-07

1981-05-12

Novosad, Stephen J.

Wells

Processes

166310, 166314, E21B 4300

Patent

active

042666074

ABSTRACT:
A method for protecting the steel casing and production tubing in a carbon dioxide production well from the corrosive effects of the produced carbon dioxide. The cased well is filled with corrosion inhibitor liquid and fluid communication between the producing formation and the casing is established by perforating or the like. A pump means, e.q. electrically driven, centrifugal pump system and a packer means are lowered on the production tubing to a point adjacent or slightly above the producing formation. The packer means is set to isolate the pump means from the well annulus above the packer means. The corrosion inhibitor liquid below the packer is pumped to the surface through the production tubing and the well is now ready to produce carbon dioxide. The corrosion inhibitor liquid in the well annulus above the packer remains in place and will absorb any carbon dioxide that may leak by or permeate through the packer means thereby alleviating the corrosive effects of such carbon dioxide on both the casing and tubing above the packer means.

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patent: 3076503 (1963-02-01), Jones
patent: 3369606 (1968-02-01), Troeller
patent: 3385358 (1968-05-01), Shell
patent: 4031955 (1977-06-01), Ledet

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