Solid invert emulsion drilling fluid additives, methods of preparation and use in oil-based drilling fluids
US10407607B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2016 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Aug 20, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/36
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.