An annular fluid or packer fluid, and methods of making the same, that includes
a water-miscible solvent, a viscosifying additive, a crosslinking agent, a crosslinking
inhibitor having the facility to inhibit crosslinking between the viscosifying
additive and the crosslinking agent, and an initiating agent having the facility
to overcome an action of the crosslinking inhibitor and to initiate crosslinking
between the viscosifying additive and the crosslinking agent, is shown and described.
The fluid has a thermal conductivity of no more than about 0.25 btu/(hrft
F.) and a potential to substantially increase its viscosity upon sitting for a
selected period of time.
