Expandable injector pipe

Details Expandable injector pipe Expandable injector pipe

E - Fixed Constructions

21

B

E21B 34/12 (2006.01)

Patent

CA 2576426

An expandable injector pipe has openings (60) and a cover sleeve (62) preferably secured at opposed ends with offset openings (64). Expansion of the base pipe causes the cover sleeve to expand while keeping the openings in the cover sleeve misaligned with the openings in the base pipe. Pressure from within the base pipe flexes the resilient cover sleeve to allow fluid to exit through the cover sleeve. Upon removal of applied pressure, the cover sleeve moves back against the base pipe to cover the openings in the base pipe to prevent flow in the reverse direction.

Un tuyau injecteur extensible possède des ouvertures (60) et une gaine (62) de préférence bien fermée aux extrémités opposées avec des ouvertures décalées (64). L~expansion du tuyau de la base fait en sorte que la gaine se détende tout en conservant les ouvertures de la gaine décalées par rapport aux ouvertures du tuyau de la base. La pression de l~intérieur du tuyau de la base fait fléchir la gaine élastique pour permettre au fluide de sortir à travers la gaine. Lorsque la pression appliquée ne s~exerce plus, la gaine revient contre le tuyau de la base pour recouvrir les ouvertures du tuyau de la base pour empêcher un débit en sens inverse.

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