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US 10,550,538 B2Granted
Method for insulating sub-soil
AssigneeTotal SA
InventorsAndré Garnier, Pascal Collet, Erik Green
Life of this patent
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Abstract
This invention relates to a method for insulating sub-soil comprising mechanically destructuring the sub-soil, injecting an insulating material into the destructured sub-soil, and mixing the sub-soil and the insulating material. The thermal conductivity of the insulating material is strictly lower than the thermal conductivity of the sub-soil.
Claims8
A method for insulating a permafrost sub-soil comprising the steps of:
- /a/ mechanically destructuring said sub-soil;
- /b/ injecting an insulating material into said destructured sub-soil;
- /c/ mixing said destructured sub-soil and said insulating material to form a mixed sub-soil;
- wherein the thermal conductivity of said insulating material is determined to be strictly lower than the thermal conductivity of the sub-soil;
- repeating the method to form an inverted cone with the mixed sub-soil, wherein a base of said inverted cone is at a surface of the sub-soil, wherein the destructuring of said sub-soil comprises drilling a vertical injection well;
- and
- said insulating material comprising a material with a low thermal conductivity and at least one cement with low hydration heat and low thermal conductivity.
4 more elements
Dependencies are inferred from the claim text.