Foamed compositions and methods of use in subterranean zones
AssigneeHalliburton Energy Services, Inc.
InventorsJiten Chatterji, Richard L. Middaugh, James E. Griffith
Life of this patent
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Abstract
The current invention provides improved methods and compositions for completing a well bore. In one aspect, the current invention provides a process for preparing a foamed cement composition. The process utilizes air to foam the cement after the air has been treated to lower the oxygen content below that concentration necessary to support combustion. Additionally, the current invention provides a process for completing a well bore using foamed cement wherein the foam is generated with reduced oxygen content air. Finally, the current invention provides a foamed cement composition wherein the gaseous portion of the composition is air having a reduced oxygen content.
Claims60
A method of foaming cement comprising the steps of:
- preparing a cement composition comprising hydraulic cement, sufficient water to form a slurry, and a mixture of foaming and foam stabilizing surfactants;
- preparing compressed air with an oxygen content less than an amount necessary to support combustion of hydrocarbons;
- and
- foaming the cement composition with the reduced oxygen content compressed air.
A method of foaming cement comprising the steps of:
- preparing a cement composition comprising hydraulic cement, sufficient water to form a slurry, and a mixture of foaming and foam stabilizing surfactants present in an amount sufficient to facilitate the formation and stabilization of foam;
- preparing compressed air with an oxygen content less than about 12.5% oxygen content by volume contacting the air with an oxygen scavenger prior to or after compressing the air;
- and
- foaming the cement composition with the reduced oxygen content compressed air.
A method of cementing in a subterranean zone comprising the steps of:
- preparing a cement composition comprising hydraulic cement, sufficient water to form a slurry, and a mixture of foaming and foam stabilizing surfactants;
- preparing compressed air with an oxygen content less than an amount necessary to support combustion of hydrocarbons present in the subterranean zone;
- foaming the cement composition with the reduced oxygen content compressed air;
- placing the resulting foamed cement composition into the subterranean zone;
- and
- allowing the foamed cement composition to set therein.
A method of cementing in a subterranean zone comprising the steps of:
- preparing a cement composition comprising hydraulic cement, sufficient water to form a slurry, and a mixture of foaming and foam stabilizing surfactants present in an amount sufficient to facilitate the formation and stabilization of foam;
- preparing compressed air with an oxygen content less than about 12.5% oxygen content by volume by contacting the air with an oxygen scavenger prior to or after compressing the air;
- foaming the cement composition with the reduced oxygen content compressed air;
- placing the resulting foamed cement composition into the subterranean zone;
- and
- allowing the foamed cement composition to set therein.
A foamed cement comprising:
- a hydraulic cement;
- water;
- and
- air having an oxygen content less than an amount required to support combustion of hydrocarbons.
A foamed cement comprising:
- a hydraulic cement;
- water;
- and
- air having an oxygen content less than about 12.5% by volume.
Dependencies are inferred from the claim text.