Method and system for generating steam in the oil industry

F - Mech Eng,Light,Heat,Weapons – 22 – B

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Details

F22B 33/00 (2006.01) E21B 43/24 (2006.01) E21C 41/24 (2006.01) F22B 33/18 (2006.01) F22B 37/26 (2006.01)

Patent

CA 2621991

The present invention provides a novel method and system for generating steam in the oil and gas industry, in particular, in the heavy oil industry. The process comprises feeding boiler feed water (BFW) of sufficient quality through one or more primary wet steam generators to generate primary wet steam therefrom; separating the primary wet steam into primary dry steam and a primary liquid phase; and feeding the primary liquid phase into one or more secondary steam generators to generate secondary steam therefrom. The secondary steam generators may or may not be wet steam generators. This unique serial configuration results in increased steam production per unit of inlet BFW, as well as an overall reduction of liquid waste or boiler blowdown, when compared to the conventional SAGD wet steam generation configuration. A system for carrying out the process is also provided.

Nouveau procédé et nouveau système de production de vapeur pour l'industrie du pétrole et du gaz, en particulier l'industrie du pétrole lourd. Le procédé comprend l'approvisionnement en eau d'alimentation de chaudière de qualité suffisante par un ou plusieurs générateurs primaires de vapeur humide afin de produire de la vapeur humide primaire; la séparation de la vapeur humide primaire en vapeur sèche primaire et en une phase liquide primaire; l'approvisionnement en vapeur en phase liquide primaire d'un ou de plusieurs générateurs de vapeur secondaires afin de générer de la vapeur secondaire. Les générateurs de vapeur secondaires peuvent ou non être des générateurs de vapeur humide. Cette configuration en série unique provoque l'augmentation de la production de vapeur par unité d'eau d'alimentation de chaudière et une réduction globale des déchets liquides ou de la dépressurisation de la chaudière, comparée à la configuration de génération de vapeur humide classique SAGD (drainage par gravité assistée par la vapeur). L'invention concerne également le mode d'exécution du procédé.

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