Expandable plugging agent and preparation method thereof, micro-capsule plugging agent, water-based drilling fluid, and use thereof
US10487255B1 · kind B1 · utility
1Cited by
2References
16Claims
0Family size
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Key dates
| Filing date | Feb 26, 2019 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Feb 26, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An expandable plugging agent is described. The expandable plugging agent is obtained through a polymerization reaction of acrylamide, a strength improving material, an acrylate, and gelatinized colloid, the acrylate is obtained through a neutralization reaction of an acidity neutralizer and acrylic acid, and the gelatinized colloid is obtained through a gelatinization reaction of starch in deionized water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.