Placement of fluids in ground by pulse-injection

E - Fixed Constructions – 21 – B

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Details

E21B 37/00 (2006.01) B09C 1/02 (2006.01) B09C 1/08 (2006.01) F16K 3/08 (2006.01) F16K 31/04 (2006.01)

Patent

CA 2663703

For use when injecting remediation liquid via an injection-well into contaminated groundwater, in the ground. The injection equipment includes a pulse-generator, which has an upstream chamber and a downstream chamber, linked by a pulse-conduit and a bypass conduit. The pulse-conduit includes a pulse-port, which opens and closes cyclically. The pulse-port is formed by the interaction of two apertures, one in the motorised rotor, the other in the stator. The rotor and stator may be formed as two facing plates held slightly apart, or as two cylinders one inside the other. The pulse-generator is located at the ground surface and can be adjusted as to pulse frequency, pulse amplitude, pulse rise-time, and as the the differential pressure between the upstream-chamber and the downstream chamber.

L'invention est destinée à être utilisée lors de l'injection dans le sol d'un liquide de mesure corrective par l'intermédiaire d'un puits d'injection dans des eaux souterraines contaminées. L'appareillage d'injection comprend un générateur d'impulsion, qui a une chambre en amont et une chambre en aval, reliées par un conduit d'impulsion et un conduit de dérivation. Le conduit d'impulsion comprend un orifice d'impulsion, qui s'ouvre et se ferme de façon cyclique. Le port d'impulsion est formé par l'interaction de deux ouvertures, l'une dans le rotor motorisé, l'autre, dans le stator. Le rotor et le stator peuvent être formés en tant que deux plaques se faisant face, maintenues légèrement espacées, ou en tant que deux cylindres l'un à l'intérieur de l'autre. Le générateur d'impulsion est situé à la surface du sol et peut être ajusté quant à la fréquence d'impulsion, l'amplitude d'impulsion, le temps de montée d'impulsion et quant à la pression différentielle entre la chambre en amont et la chambre en aval.

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