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US 8,475,585 B2Granted
Stable foamed cement slurry compositions and methods for making and using same
AssigneeClearwater International, LLC
InventorsFrank Zamora, Marilyn J. Bramblett, Sarkis R. Kakadjian
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Abstract
A foamed cement composition is disclosed for utilization in performing a variety of well cementing operations, and to methods for making and using same. The foamed cement composition basically includes a cement, water sufficient to form a pumpable slurry, a gas sufficient to foam the slurry, a foaming agent and optionally a foam stabilizing agent.
Claims12
A foamed, gelled cement composition comprising:
- a foamable composition including:
- a cement,
- a water-based fluid present in an amount between about 20 wt. % and about 80 wt. % based on the weight of the cement,
- a foaming composition comprising (1) a first additive composition including (a) a charged polymer, (b) a stabilizing agent, and (c) a water and (2) a second additive composition comprising an oppositely charged surfactant present in an amount between about 0.05 wt. % and about 10 wt. % of the water-based fluid to form a pre-foamed, gelled slurry including an ionic gel system comprising the charged polymer ionically bonded to the oppositely charged surfactant, and
- a gas present in an amount between about 5 vol. % and about 85 vol. % based on the pre-foamed, gelled slurry to form the foamed, gelled cement composition, where the foamed, gelled cement composition is stable at temperatures from room temperature up to about 350° F. for a period of time sufficient for cement placement and cement setting and where the foamed, gelled cement composition is compressible prior to setting.
2 more elements
Dependencies are inferred from the claim text.