Cement compositions comprising humic acid grafted fluid loss...

Details Cement compositions comprising humic acid grafted fluid loss... Cement compositions comprising humic acid grafted fluid loss...

2007-01-11

2009-08-18

Seidleck, James (Department: 1796)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S207000, C507S222000, C507S225000, C507S226000, C507S230000, C507S235000, C507S261000, C507S269000, C523S130000, C528S227000, C166S295000

Reexamination Certificate

active

07576040

ABSTRACT:
Exemplary embodiments of the cement compositions comprise water, a cement, and a fluid loss control additive, the fluid loss control additive comprising a graft copolymer. The graft copolymer comprises a backbone and at least four grafted monomers selected from the group consisting of 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, acrylic acid, vinylphosphonic acid, diallyldimethylammonium chloride, and salts thereof. The backbone of the graft copolymer comprises a humic acid salt. Methods of cementing using exemplary embodiments of the cement compositions are also provided.

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