M-I SWACO is a global energy services company that specializes in drilling fluid systems and technologies for the petroleum industry. Founded in 1984 and now part of Schlumberger, the company is headquartered in Houston, Texas, and employs around 10,000 people across more than 75 countries.

The company offers a wide range of products and services, including custom-engineered drilling fluid systems, specialized chemical additives, and solids control equipment. These solutions are designed to enhance drilling performance in various challenging environments, such as high-pressure high-temperature wells and deepwater drilling. M-I SWACO also provides reservoir drill-in and completion fluids, production chemicals, and drilling waste management services, all aimed at improving efficiency and minimizing environmental impact in hydrocarbon exploration and production.