PURELUBRI®EP is a high temperature, extreme-pressure lubricant for use in all water-based drilling fluids. PURELUBRI®EP is effective for reducing torque, drag and friction, preventing side-wall sticking, prolonging bit bearing life, and preventing corrosion. PURELUBRI®EP reacts directly with metal surface by a chemisorption process, forming a continuous lubricating film on the BHA surface. This film forms a physical barrier that reduces metal-to-metal friction and pipe wear, and protects the metal surfaces against corrosion hydrogen embrittlement. PURELUBRI®EP contains no hydrocarbons and no harmful to human health and environmental.