Learn how rheology modifiers control PV, YP, gel strength and LSRV in drilling fluids. Compare xanthan gum, organoclay and specialty polymers and learn how to select the right modifier for WBM and OBM.

Learn the main types of drilling fluid additives, their functions, applications, and selection factors for WBM and OBM systems, including PAC, starch, shale inhibitors, lubricants and LCMs.

Learn how PAC, CMC, modified starch and other fluid loss control additives work in drilling fluids, including selection factors, dosage, testing and applications.

Understand the difference between rheology modifiers and viscosifiers in drilling fluids, including their effects on PV, YP, LSRV, gel strength, and mud selection.

Learn how to choose drilling fluid additives based on formation, mud system, temperature, salinity, calcium, well trajectory, performance requirements, and laboratory testing.

Oil-based drilling fluid (commonly referred to as oil-based mud or OBM) is a specialized drilling fluid system widely used in challenging oil and gas drilling environments. Compared with water-based drilling fluids, oil-based drilling fluids offer superior thermal stability, lubrication, shale inhibition, and wellbore stability, making them the preferred choice for high-temperature, high-pressure (HTHP), deepwater, and complex well applications.