Thinner for oil-based drilling fluids
US10723931B2 · kind B2 · utility
1Cited by
11References
8Claims
0Family size
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Key dates
| Filing date | Nov 19, 2015 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | May 29, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/062
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A thinner that is a polycondensed fatty acid that is selected from the group consisting of 12-hydroxystearic acid, 12-hydroxyoctadecanoic acid, polyhydroxystearic acid, reaction products with stearic acid, octadecanoate, octadecanoic acid, and homopolymers of stearic 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.