Cementing subterranean zones using cement compositions...

Wells – Processes – Cementing – plugging or consolidating

Reexamination Certificate

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C166S293000, C166S294000, C106S727000, C106S728000, C106S802000, C106S808000, C106S810000, C106S823000

Reexamination Certificate

active

06953090

ABSTRACT:
Methods of cementing subterranean zones using cement compositions containing biogradable dispersants are provided. The methods are basically comprised of the steps of preparing a hydraulic cement, a biodegradable dispersant comprised of polyaspartic acid containing side chains formed by reacting one or more side chain chemicals with said polyaspartic acid and sufficient water to form a pumpable slurry, placing the cement composition into a zone to be cemented and allowing the cement composition to set into an impermeable solid mass therein.

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