Patent ID: 11926788
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 9:
10. A foamed treatment fluid comprising:
a cement comprising at least one cementitious material selected from the group consisting of a Portland cement, pozzolanic cement, gypsum cement, high alumina content cement, slag cement, a Sorel cement, and combinations thereof;
a viscosifying agent comprising a synthetic clay;
a thixotropic additive comprising at least one component selected from the group consisting of fumed silica, sodium silicate, potassium silicate, silicic acid, colloidal silicic acid, and combinations thereof;
a foaming surfactant comprising a polyethylene glycol alkyl ether (C6-C10), sulfate ammonium salt;
a gas comprising nitrogen; and
water, wherein the foamed treatment fluid has a 10-second static gel strength of at least about 15 lbf/100 ft2, and a 10-minute static gel strength of at least about 70 lbf/100 ft2; and wherein the foamed treatment fluid has a density of about 8 lb/gal to about 11 lb/gal.