Chromium-free sulfonate brown coal

项目指标水份（%）≤18.0PH值8.0-11.0水溶性干基腐植酸（%）≥50.0铬离子显色反应无反应常温性能高温后性能表观粘度，mpa.s≤8.0≤10.0中压滤矢量，ml≤9.5≤10.5降粘率，（%）≥75.0≥80.0Lmin静切力，Pa≤1.0≤1.0高温高压失水，ml≤25.0 磺化褐煤SMC是褐煤腐植酸的衍生物，是褐煤在经碱化、磺化再经铬盐交联在适当温度等条件下合成制得的，其外观性

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Oilfield drilling series

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Description

Project	index
Water content (%) ≤	18.0
PH value	8.0-11.0
Water-soluble dry base humic acid (%) ≥	50.0
Chromium ion color reaction	No reaction
	Room temperature performance	High temperature performance
Apparent viscosity, mpa.s	≤8.0	≤10.0
Medium pressure filter vector, ml	≤9.5	≤10.5
Drop viscosity, (%)	≥75.0	≥80.0
Lmin static force, Pa	≤1.0	≤1.0
High temperature and high pressure water loss, ml	≤25.0

Product introduction

Sulfonated brown coal SMC is a derivative of brown coal humic acid, which is obtained by the synthesis of brown coal after alkalization, sulfonation, and cross-linking of chromium salts at appropriate temperatures. The appearance is dark brown powder. It is a cheap and efficient mud treatment agent, which is used as a viscosity reducer and fluid loss inhibitor in fresh water drilling fluid with excellent high temperature resistance. It can be used in various water-based drilling fluid systems directly and can be used in combination with a variety of treatment agents. General dosage is 3-5%.

Usage methods

1. This product has the dual effect of reducing fluid loss and viscosity reduction

2. With excellent temperature resistance, it can resistant 200-220 °C high temperature, especially suitable for using in deep wells

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