Directions | Contact | Safety | Jobs ABOUT US MINING AGRICULTURE DRILLING PRODUCTS DRILLING PRODUCTS Improved Productivity With Drilling Products In the oil field, leonardite is better known as "lignite" and is predominantly used in water - based drilling fluid. Leonardite Products oil field line of products is called LenOX®. The colloidal and soluble properties (alkali solubility tests are 70% or higher) of LenOX®; help in fluid loss control, serve as clay deflocculants and improve filter cake quality. Leonardite can also be modified for use in oil-based drilling fluids. Explore Our Products Oxidized lignite, suitable for drilling fluid. LEARN MORE © 2021 Leonardite Products. All rights reserved. Site by DAWA HELPFUL LINKS Directions Safety Data Sheets The Mine Our Process Jobs Humic Products Trade Association CONTACT US PLANT 13375 Highway 1804 Williston, ND 58801 701.572.2315 701.572.7659 Source@LeonarditeProducts.com LOADING HOURS 8 am to 3 pm CT Monday — Friday