C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/16
C09K 8/588 (2006.01) C08L 71/02 (2006.01) C09K 8/20 (2006.01) C09K 8/22 (2006.01) C09K 8/50 (2006.01)
Patent
CA 1172840
30602CA Abstract of the Disclosure Polyethylene glycols in combination with at least one water-dispersible polymeric viscosifier comprising cellulose ethers, cellulose sulfate esters, polyacrylamides, guar gum, or heteropolysaccharides improve the water loss properties of water-based drilling fluids, particularly in hard brine environments.
395198
Osler Hoskin & Harcourt Llp
Phillips Petroleum Company
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