Foamed fly ash cement compositions and methods of cementing

Details Foamed fly ash cement compositions and methods of cementing Foamed fly ash cement compositions and methods of cementing

2003-12-19

2008-08-19

Marcantoni, Paul (Department: 1755)

Wells

Processes

Cementing, plugging or consolidating

C166S293000, C106S705000, C106S724000, C106S726000, C106S727000, C106S823000, C106SDIG002

Reexamination Certificate

active

07413014

ABSTRACT:
Methods of cementing and low density foamed cement compositions therefor are disclosed. A low density foamed cement composition of the invention comprises fly ash comprising calcium oxide or calcium hydroxide, water present in an amount sufficient to form a slurry, a foaming and foam stabilizing surfactant or a mixture of surfactants present in an amount sufficient to facilitate foam and stabilize the foamed cement composition, and sufficient gas to foam the foamed cement composition.

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