Viscous heavy brines

Details Viscous heavy brines Viscous heavy brines

C - Chemistry, Metallurgy

09

K

31/26

C09K 8/10 (2006.01)

Patent

CA 1187690

-16- Abstract Hydroxyethyl cellulose and a sequestrant are added to a heavy brine containing one or more salts selected from calcium chloride, calcium bromide, and zinc bromide to increase the viscosity of the brine. Preferably the brine contains zinc bromide, has a density in the range from about 14.2 - 19.2 pounds per gallon, and the sequestrant is a polyphosphonic acid or water soluble salt thereof.

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