Water-based drilling fluids for deepwater drilling and use thereof
US10836947B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Feb 27, 2019 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Feb 27, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/34
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A water-based drilling fluid for deepwater drilling includes 0.1%-1.0% by weight of a viscosifier, 0.1%-1.0% by weight of an acidity regulator, 0.5%-3.5% by weight of a filtrate loss reducer, 0.5%-1.5% by weight of a low-temperature yield point enhancer, 1.0%-5.0% by weight of a shale inhibitor, 15%-25% by weight of a hydrate inhibitor, 1.0%-3.0% by weight of a lubricant, 5.0%-10.0% by weight of a temporary plugging agent and seawater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.