C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 24/12 (2006.01) C04B 28/02 (2006.01) C09K 8/46 (2006.01) E21B 33/138 (2006.01)
Patent
CA 2212600
The present invention provides set retarding additives, set retarded hydraulic cement compositions and methods of using the set retarded cement compositions for cementing subterranean zones in wells. A preferred set retarding additive comprises an alkanolamine salt produced by the reaction of a hydroxy carboxy acid, such as tartaric acid, gluconic acid or glucoheptonic acid, with an alkanolamine, such as monoethanolamine, diethanolamine or triethanolamine.
La présente invention porte sur des additifs retardateurs de prise, des compositions de ciment hydraulique à prise retardée et des méthodes pour utiliser les compositions de ciment à prise retardée pour cimenter des zones souterraines dans les puits. Un additif retardateur de prise de choix comprend un sel d'alcanolamine produit par la réaction d'un acide hydroxycarboxylique, comme l'acide tartrique, l'acide gluconique ou l'acide glucoheptonique, avec une alcanolamine, comme la monoéthanolamine, la diéthanolamine ou la triéthanolamine.
Chatterji Jiten
Davis Garland W.
Morgan Rickey L.
Halliburton Energy Services Inc.
Swabey Ogilvy Renault
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