Organic colloid treated drilling fluid is a crucial component in the oil and gas industry, used for lubricating and cooling the drill bit and transporting the drill cuttings to the surface. There are several synonyms for this type of drilling fluid, including clay-free mud, non-aqueous drilling fluid, and oil-based mud. Other terms used in the industry include invert emulsion mud and synthetic-based mud. These synonyms essentially describe the same type of drilling fluid, with varying degrees of specific details about the composition. But the overall function remains the same, and technicians use these synonyms according to the type of drilling operation they undertake.