An injection apparatus for injecting an activated fluid into...

E - Fixed Constructions – 21 – B

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Details

E21B 27/02 (2006.01) E21B 33/138 (2006.01)

Patent

CA 2582941

An injection apparatus for injecting an activated fluid into a well-bore comprises a reservoir (3, 103, 203, 303) containing an activation fluid AF. The injection apparatus further comprises: a valve arrangement (2, 102, 202, 302) adapted to be coupled to a pipe (6, 106, CS1, CS3) for receiving a first fluid F1 flow, a dosing and mixing arrangement (4, 104, 204, 304) coupled to the reservoir (3, 103, 203, 303) and to the valve arrangement (2, 102, 202, 302). The valve arrangement has a rest configuration in which the injection apparatus provides a non-activated fluid mixture F1" and an activated configuration in which the injection apparatus provides an activated fluid mixture F2. The dosing and mixing arrangement comprises an engine part (31, 131, 231, 331) mechanically coupled to a pumping part (32, 132, 232, 332). The engine part runs the pumping part and the pumping part sucks the activation fluid AF of the reservoir when the valve arrangement is in the activated configuration. The dosing and mixing arrangement mixes the activation fluid AF with the first fluid and provides an activated fluid mixture flow F2 at an outlet (8, 108", 208, 308).

Un dispositif d'injection permettant d'injecter un fluide activé dans un puits de forage comprend: un réservoir (3, 103, 203, 303) renfermant un fluide d'activation (AF); un ensemble robinet (2, 102, 202, 302) conçu pour être couplé à un tuyau (6, 106, CS1, CS3) et pour recevoir l'écoulement d'un premier fluide (F1); et un ensemble de dosage et de mélange (4, 104, 204, 304) conçu pour être couplé au réservoir (3, 103, 203, 303) ainsi qu'à l'ensemble robinet (2, 102, 202, 302). L'ensemble robinet possède une configuration de repos dans laquelle le dispositif d'injection fournit un mélange de fluide non activé (F1) et une configuration activée dans laquelle le dispositif d'injection fournit un mélange de fluide activé (F2). L'ensemble de dosage et de mélange comprend une partie moteur (31, 131, 231, 331) couplée mécaniquement à une partie de pompage (32, 132, 232, 332). La partie moteur entraîne la partie de pompage, laquelle aspire le fluide d'activation (AF) du réservoir lorsque l'ensemble robinet se trouve dans la configuration activée. L'ensemble de dosage et de mélange mélange le fluide d'activation (AF) au premier fluide et fournit un écoulement de mélange de fluide activé (F2) à une sortie (8, 108", 208, 308).

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