Method of cementing a subterranean zone

Details Method of cementing a subterranean zone Method of cementing a subterranean zone

E - Fixed Constructions

21

B

31/30

E21B 33/138 (2006.01) C04B 24/40 (2006.01) C04B 28/02 (2006.01) C08K 5/00 (2006.01)

Patent

CA 1253680

ABSTRACT There is described a method of cementing a subterra- nean zone penetrated by a well bore by providing a set retarded aqueous hydraulic cement slurry; admixing with the cement slurry to enhance the compressive strength development thereof after placement, an effective amount of a delayed retarder neutralizer selected from the group consisting of: a triethanolamine titanium chelate represented by one of the formulae: Image wherein R is independently an alkyl or aryl group, Image wherein R1 is independently OC3H7, OH or a halogen atom, and partially polymerized chelates produced from the triethanol- amine chelates, and placing the cement slurry across the zone or zones by way of the well bore and allowing the cement slurry to set into a hard mass therein having enhanced compressive strength.

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