Well grouting processes

E - Fixed Constructions – 21 – B

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E21B 43/00 (2006.01) C04B 28/02 (2006.01) C04B 38/10 (2006.01) C09K 8/42 (2006.01) C09K 8/493 (2006.01) C09K 8/518 (2006.01) E21B 33/13 (2006.01) E21B 33/138 (2006.01) E21B 33/14 (2006.01)

Patent

CA 1031153

PRECIS DE LA DIVULGATION: Procédé de cimentation d'un puits traversant une formation qui renferme du gaz, permettant de réaliser une cimen- tation étanche empêchant que le gaz ne diffuse à travers le ciment. Selon ce procédé, on effectue la cimentation en injec- tant un lait de ciment auquel est incorporé un agent moussant qui coopère avec le gaz de la formation pour former un écran de mousse s'opposant à la migration ultérieure du gaz au cours de la prise en masse du lait de ciment, cet agent moussant étant constitué d'une solution aqueuse uniphasique renfermant un com- posé tensio-actif ionique et un composé tensio-actif non ionique.

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