SOLID INVERT EMULSION DRILLING FLUID ADDITIVES, METHODS OF PREPARATION AND USE IN OIL-BASED DRILLING FLUIDS

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.

主权项

1. A method of preparing a solid invert emulsion drilling fluid additive comprising:
heating a liquid drilling fluid additive to a temperature of about 50-175° C.; contacting said heated liquid drilling fluid additive with an inert filler to form a mixture; blending and cooling said mixture; pulverizing said mixture to form a free-flowing powdered solid invert emulsion drilling fluid additive.