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Zwitterionic Salt-resisting Fluid Loss Agent for Drilling Fluid—JHJS 2014/1/23 11:56:56 
Introduction
It is a macromoleclar polymer with characteristics of negative ion and positive ion, which is produced from vinyl compound by graft copolymerization reaction.
Usage
It can be made into colloid and then added into drilling fluid or added directly, and the addition is 0.3%～0.7%.
Main Quality Indexes
ITEM
INDEX
extrinsic features
white or yellow powder
water content/(%)
≤10.0
throughput (standard sieve with 0.90mm bore diameter)/（%）
≥95.0
pH
7.0～9.0
apparent viscosity/(mPa·s)
≤15.0
filter loss/(mL)
≤10.0
apparent viscosity/(mPa·s)
≤15.0
filter loss/(mL)
≤10.0
escalating rate of apparent viscosity after hot aging at 160℃/(%)
20g bentonite + basic mud
450～700
20g bentonite +basic mud +sample
≤300.0
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