Cement spacer fluid with polyethyleneimine hydrochloride salt as a shale inhibitor
US12173226B2 · kind B2 · utility
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38References
6Claims
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Key dates
| Filing date | Jun 16, 2023 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Jun 16, 2043 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A cement spacer fluid and a method for making and a method for using the cement spacer fluid are provided. The cement spacer fluid includes a polyethyleneimine hydrochloride (PEI HCl) salt, an aqueous solvent, a viscosifier, and a weighting agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.