Methods and compositions for sealing pipe strings in well bores

E - Fixed Constructions – 21 – B

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Details

E21B 43/10 (2006.01) C09K 8/42 (2006.01) C09K 8/50 (2006.01) C09K 8/508 (2006.01) E21B 33/138 (2006.01)

Patent

CA 2245032

The present invention provides improved methods and compositions for sealing a pipe string in a well bore. The methods basically comprise the steps of preparing a hardenable epoxy sealing composition which hardens into a resilient solid mass having high bond strength comprising an epoxide containing liquid, an organosilane compound and a hardening agent, placing the epoxy composition in the annulus between the pipe and the walls of the well bore and allowing the epoxy composition to harden.

La présente invention porte sur des méthodes améliorées utilisées pour sceller une colonne de tubes dans un puits. Les méthodes comprennent fondamentalement les étapes suivantes : préparer une composition de scellement à base d'époxy durcissable qui durcit et forme une masse élastique pleine possédant une résistance d'adhésion élevée comprenant une époxy contenant un liquide, un composé d'organosilane et un agent de durcissement; à placer la composition à base d'époxy dans l'espace annulaire entre le tube et les parois du puits, et à laisser durcir la composition à base d'époxy.

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