Versamod viscosifier is a liquid rheology modifier used in VERSADRIL diesel oil-based and VERSACLEAN mineral oil–based systems.

It increases low-shear-rate viscosities [LSRV] and gel strengths for improved hole cleaning. The primary application for Versamod viscosifier is in large-diameter, high-angle, horizontal, and extended-reach wells to increase cuttings-carrying capacity. This permits higher rates of penetration while maintaining wellbore stability. Versamod viscosifier, when used at proper concentrations, produces the highly shear-thinning rheological profile found in VERSAPORT oil mud systems.