Water-based drilling fluids having enhanced fluid loss control

Details Water-based drilling fluids having enhanced fluid loss control Water-based drilling fluids having enhanced fluid loss control

C - Chemistry, Metallurgy

09

K

400/1400, 31/17

C09K 8/24 (2006.01)

Patent

CA 1083333

INVENTOR Robert E, Slinqerland 6311 Beverly Hill, #65 Houston, Texas 77057 TITLE: WATER-BASED DRILLING FLUIDS HAVING ENHANCED FLUID LOSS CONTROL ABSTRACT: A water based drilling fluid and process for using the same comprising a mixture of water and a polymer complex, wherein the polymer complex is the reaction product of a dispersant selected from the group consisting of lignite, sulfonated lignite, lignosulfonate, and sulfoalkylated lignite, and salts thereof and a water-soluble sulfonated polystyrene havinq a molecular weight of at least 70,000 and containing 0.7 to 2.0 sulfonic acid groups per styrene unit. -1-

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