Saturated salt water drilling fluid of salt response type intelligent polymer and preparation method thereof
US11453812B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2021 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | May 11, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to the field of drilling fluid, in particular to a saturated salt water drilling fluid of salt response type intelligent polymer and preparation method thereof. The drilling fluid contains two or more of the following components stored in admixture or separately: bentonite, NaOH, KCl, calcium carbonate, barite, NaCl, supramolecular fluid loss additive, supramolecular shear-enhancing agent, plugging agent, coating agent and water. The drilling fluid provided by the invention has the characteristics of salt response and self-assembly, can keep rheological properties such as rapid recovery of the sheared structure, low extreme high shear rate viscosity, good shear dilution property and the like in a high-salt environment, has good fluid loss reduction performance, reservoir protection performance and debris dispersion inhibition performance, and has good temperature resistance and pollution resistance performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.