SOLID INVERT EMULSION DRILLING FLUID ADDITIVES, METHODS FOR THEIR PREPARATION AND THEIR USE IN OIL-BASED DRILLING FLUID COMPOSITIONS

摘要

Solid free-flowing powdered drilling fluid additives compositions having desirable emulsifying, wetting and other performance characteristics are described. Their method of preparation and their use in oil-based drilling fluid compositions are described. The manufacturing process comprises of contacting(spraying or mixing) different types of liquid invert emulsion additives individually at elevated temperature with a blend of inert fillers in specific proportions and of particular particle size in a blender for a specified time. The solid powdered additives thus obtained are controlled pulverized to obtain the final particle size which does not alter the performance of each individual additive. The solid invert emulsion additives obtained are added to drilling fluid compositions yielding drilling muds with improved performance. Solid powdered additives compositions greatly reduce transportation costs and simplify the logistics and environmental concerns associated with shipping large volumes of solvent-containing liquids and overcome the pour point issues associated with liquid additives.