Micro-nano composite plugging agent for drilling fluid and preparation method thereof, and drilling fluid and use thereof
US10336932B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2019 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Feb 28, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/34
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention discloses a micro-nano composite plugging agent for drilling fluid, a preparation method of the micro-nano composite plugging agent for drilling fluid, a drilling fluid, and an application thereof. The composite plugging agent contains nanometer calcium carbonate, nanometer zinc oxide whiskers, nanometer emulsified paraffin, a flocculating agent, and a lubricant, wherein in the composite plugging agent, the nanometer calcium carbonate is in 10-36 parts by weight, the nanometer zinc oxide whiskers are in 20-40 parts by weight, the nanometer emulsified paraffin is in 30-70 parts by weight, the flocculating agent is in 1-10 parts by weight, and the lubricant is 5-20 parts by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.