Water-based drilling fluid compositions and methods for drilling subterranean wells
US11566157B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Feb 16, 2021 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Feb 16, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Water-based drilling fluids may include an aqueous base fluid and a mixture of polyethylene polyamines in an amount of from 1 lbm/bbl to 20 lbm/bbl relative to the total volume of the water-based drilling fluid. The polyethylene polyamines of the mixture may have a first chemical structure H2NCH2CH2(NHCH2CH2)xNH2, where x may be an integer greater than or equal to 3. The average molecular weight of the polyethylene polyamines in the water-based drilling fluid having the first chemical structure may be from 200 g/mol to 400 g/mol. Methods for drilling a subterranean well with the water-based drilling fluids are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.