CPC E21B 43/27 (2020.05) [C09K 8/685 (2013.01); C09K 8/80 (2013.01)] | 10 Claims |
1. A tip screen-out mixture comprising:
water;
a hydrophilic polymer of anionic, polyacrylamide, wherein the hydrophilic polymer is hydrolized at least in part, and further wherein the hydrophilic polymer comprises a hydrophilic polymer concentration in the water; and
one or more crosslinking agents selected from a group of compounds consisting of polyvalent metal cations, wherein the one or more crosslinking agents comprises a crosslinking agent concentration in the water;
wherein the hydrophilic polymer concentration and the crosslinking agent concentration are each between 0.01 wt. % and 10 wt. % in the water, and further wherein the temperature of the hydrophilic polymer is selected to timely inhibit crosslinking of hydrogels until properly disposed in one or more hydraulic fractures.
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