Thinner for oil-based drilling fluids
US10723929B2 · kind B2 · utility
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1Claims
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Key dates
| Filing date | Mar 4, 2016 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Jul 4, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/065
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A thinner that is a poly fatty amide reacted with maleic acid to form a product, and diluting the product with a compound selected from the group consisting of oleyl alcohol, fatty acid, and poly condensed fatty acid is able to reduce the viscosity of oil-based drilling fluid, thus allowing for reuse of the oil-based drilling fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.