Low fluid loss heavy brines containing hydroxyethyl cellulose

Details Low fluid loss heavy brines containing hydroxyethyl cellulose Low fluid loss heavy brines containing hydroxyethyl cellulose

E - Fixed Constructions

21

B

31/26

E21B 43/22 (2006.01)

Patent

CA 1204586

Abstract of the Disclosure Disclosed are heavy brine compositions containing zinc bromide, calcium chloride and calcium bromide, and a fluid loss reducing amount of hydroxyethyl cellulose. The brine contains more than about 20% by weight zinc bromide and a concentration of calcium chloride of at least (2X-33)% by weight where X is the % of the weight of zinc bromide in the brine. The brine is used in the oil and gas industry.

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