Pressure-bearing plugging composition, pressure-bearing plugging slurry and preparation method and use thereof
US11396621B1 · kind B1 · utility
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12Claims
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Key dates
| Filing date | Oct 26, 2021 |
| Grant date | Jul 26, 2022 |
| Priority date | — |
| Expiry date | Oct 26, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present discloses a pressure-bearing plugging composition comprising 1-7 parts by weight bentonite, 0.1-1.5 parts by weight deformation material, 8-18 parts by weight filling material and 4-12 parts by weight modified bridging material, based on 100 parts by weight of water; the modified bridging material comprises a core, and a coating layer coated on an outer surface of the core, and a paraffin layer disposed between the core and the coating layer; the core is made of a water-absorbing material, and the coating layer is formed by bonding rigid particles and an adhesive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.