Heat Resistance and Salt Tolerance Polymer for Fluid Loss Control Polymer is a powdery polymer. Fluid Polymer with white to light-yellow appearance was polymerized by heat resistance and salt tolerance allyl monomers. It provides better rheology regulation and fluid loss control. The product has some advantages as follows: low viscosity effect in mud by special molecular structure; superior function in fresh mud and brine mud; Better heat resistance in fluid loss system; Perfect anti-sloughing and clay hydration control performance. Performance evaluation Rheology and fluid loss table1 rheology and fluid loss

mud type	hot rolling 150℃×16h	AV mpa.s	FL mL
4%NaCl	before hot rolling	21	7.4
	after hot rolling	15	10.2
saturated brine	before hot rolling	22	8.0
	after hot rolling	16	10.4

*Brine+10% benonite+0.3%NaCO₃+2%polymer product. Anti-sloughing and clay hydration control performance  table2 anti-sloughing and clay hydration control performance

sample	expansion coefficient reduction rate   %	cuttings rolling recovery %
Acrylic acid – acrylamide copolymer	51.2	89.0
polymer product	58.4	91.4

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