Nanosilica dispersion for thermally insulating packer fluid
AssigneeSaudi Arabian Oil Company
InventorsVikrant Wagle, Abdullah Al-Yami, Zainab Alsaihati, Abdulaziz Alhelal
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Abstract
A method to control a heat transfer profile in a defined space, the method comprising the steps of introducing a thermally insulating packer fluid into the defined space such that the thermally insulating packer fluid forms a gelled solid and reduces a rate of heat transfer through the defined space as compared to a prior rate of heat transfer through the defined space before introducing the thermally insulating packer fluid, where the thermally insulating packer fluid comprises an acidic nanosilica dispersion and a polyamine.
Claims5
A solid gelled material useful for controlling the heat transfer profile through a defined space, where the solid gelled material forms by introducing an acidic nanosilica dispersion to the defined space, the acidic nanosilica dispersion comprising:
- amorphous silicon dioxide in the range of 5 weight percentage of the total weight (w/w %) of the acidic nanosilica dispersion to about 50 w/w % of the total weight of the acidic nanosilica dispersion;
- water in the range of 50 w/w % to 95 w/w % of the total weight of the acidic nanosilica dispersion;
- an acid comprising acetic acid;
- and
- a polyamine activator;
- where the acidic nanosilica dispersion forms the solid gelled material at an elevated temperature between about 100° F. and about 300° F. in the defined space and has an intial pH that is acidic.
Dependencies are inferred from the claim text.