System and method for capping abandoned wells

Details System and method for capping abandoned wells System and method for capping abandoned wells

E - Fixed Constructions

21

B

E21B 33/00 (2006.01) E21B 34/00 (2006.01)

Patent

CA 2622531

The invention describes a system for capping an abandoned well having production casing and surface casing. The system enables the effective sealing of the production casing volume from the surface casing volume such that any gases leaking from either volume can be independently released from independent valves. The system is particularly effective in improving the safety of re-entering an abandoned well.

La présente invention décrit un système de fermeture d'un puits abandonné muni d'un tubage de production et d'un tube guide. Le système permet de sceller efficacement le volume du tubage de production du volume du tube guide de telle sorte que des fuites de gaz d'un des volumes peuvent être mises à l'air libre par le biais de robinets indépendants. Ce système est particulièrement efficace pour améliorer la sécurité lors de la rentrée dans un puits abandonné.

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