Aqueous well drilling fluids

Details Aqueous well drilling fluids Aqueous well drilling fluids

C - Chemistry, Metallurgy

09

K

31/27

C09K 8/10 (2006.01) C09K 8/08 (2006.01)

Patent

CA 1188878

Abstract of the Disclosure A method and composition for decreasing the fluid loss of aqueous well servicing fluids in which an additive comprised of a cross-linked hydroxyethyl starch and a polymeric com- ponent such as a carboxyalkyl cellulose ethers or xanthan gum is added, in effective amounts, to the aqueous fluid, the aqueous fluid preferably being one which contains at least one water soluble salt of a multi-valent metal ion.

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