CPC C09K 8/5045 (2013.01) [C09K 8/508 (2013.01); C09K 8/516 (2013.01); E21B 33/138 (2013.01); C09K 2208/10 (2013.01)] | 19 Claims |
1. A downhole system, comprising:
a packer sealing an annular space between a downhole inner tubing and an outer tubing; and
an insulating packer fluid if (i) positioned within the annular space and adjacent the packer, and (ii) insulating the inner tubing, wherein the insulating packer fluid comprises:
an acidic nanosilica dispersion, comprising:
silica nanoparticles; and
a stabilizer;
wherein the pH of the acidic nanosilica dispersion ranges from 2 to 5; and
a sodium bicarbonate activator.
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