Hydra CX is used for crosslinking of polysaccharide linear gel on the basis of guar and its derivatives with some time lap, which makes it possible to mitigate resistance loss when fluid moves in pipes and to increase the speed of pumping. The crosslinking time varies in the range from 70 seconds to 5 minutes, depending on pH value, the temperature of linear gel and concentration of the product.
Recommended concentration of Hydra CX in frac fluids should be from 1.5 to 4.0 kg/m3. The gel, obtained with the use of these crosslinkers, has good thermal stability in the range of temperatures from 70 to 120 °С. It is recommended to conduct laboratory tests for specific well conditions.