Sulfonated Lignite
Sulfonated lignite is a lignite humic acid derivatives,it is obtained of the lignite under the conditions of the sulfonating agent and proper temperature. It's brown black powder appearance. It is a kind of fresh water drilling viscosity depressant and filtration loss control agent, can resistance to 200°C~220°C high temperature. It is a kind of cheaply-priced and efficient mud conditioner.

Sulfonated lignite mainly used in petroleum, geological exploration drilling. In the drilling mud, it has a significant role in filtrate loss reduction and viscosity reduction control.It can use with many kinds of drilling fluid together directly.