Invert-emulsion drilling fluids and methods for reducing lost circulation in a subterranean formation using the invert-emulsion drilling fluids
US11359125B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2020 |
| Grant date | Jun 14, 2022 |
| Priority date | — |
| Expiry date | Apr 27, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An invert-emulsion drilling fluid may include a dispersed aqueous phase including an aqueous base fluid, a continuous non-aqueous phase including a non-aqueous base fluid, and a first bridging package. The first bridging package may include one or more particulate carbonate materials. All of the particulate carbonate materials of the invert-emulsion drilling fluid may be part of the first bridging package. The first bridging package may have a trimodal particle size distribution such that the particle size distribution of the first bridging package includes three peaks, wherein each peak may be in the range of less than or equal to 300 microns in the particle size distribution. The invert-emulsion drilling fluid may be included in methods for reducing lost circulation in subterranean formations during drilling operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.