Method for protecting a carbon dioxide production well from corrosion
Patent
·
OSTI ID:5458032
A method is described 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 (an electrically driven, centrifugal pump) and a packer are lowered on the production tubing to a point adjacent or slightly above the producing formation. The packer is set to isolate the pump from the well annulus above the packer. 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 thereby alleviating the corrosive effects of such carbon dioxide on both the casing and tubing above the packer. The pump boosts the pressure of the produced carbon dioxide to a value sufficient to produce carbon dioxide at the surface above its critical pressure. 6 claims.
- Assignee:
- Mobil Oil Corp.
- Patent Number(s):
- US 4266607
- OSTI ID:
- 5458032
- Country of Publication:
- United States
- Language:
- English
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