Methods and apparatus for multiple fracturing of...

E - Fixed Constructions – 21 – B

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E21B 43/114 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2611928

The invention relates to methods and apparatus for creating multiple fractures in subterranean formations. The apparatus is a jetting tool having a plurality of sets of jetting nozzles so that the sets of nozzles are substantially parallel to one another such that parallel cavities may be formed substantially simultaneously in the formation. The jetting nozzles may be adapted to provide a fluid jet that flares outwardly from the nozzle. The nozzles also may be aligned such that cavities in the formation overlap to form a single cavity. The nozzles may be further adapted so that holes jetted into the casing thereby are still spaced from one another. Methods of fracturing subterranean formations using the apparatus are also disclosed.

L~invention concerne des procédés et un appareil permettant de créer de multiples fractures dans des formations souterraines. L~appareil est un outil de projection de jet ayant une pluralité d~ensembles de buses de propulsion de jet disposés de telle sorte que les ensembles de buses se trouvent sensiblement parallèles les uns par rapport aux autres, créant ainsi de manière sensiblement simultanée des cavités parallèles dans la formation. Les buses de projection de jet peuvent être agencées de manière à assurer un jet de liquide qui sort de manière évasée vers l~extérieur de la buse. Les buses peuvent également être alignées de manière à ce que les cavités situées dans la formation se chevauchent pour former une seule cavité. Les buses peuvent aussi être agencées de telle sorte que des orifices injectés dans le logement sont encore espacés les uns par rapport aux autres. L~invention se rapporte en outre aux procédés permettant de créer de multiples fractures dans des formations souterraines en se servant de l~appareil susmentionné.

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