Methods for wellbore strengthening
US11535786B2 · kind B2 · utility
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2References
16Claims
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Key dates
| Filing date | Nov 12, 2019 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | Nov 12, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A wellbore fluid may include an oleaginous fluid forming a continuous phase; a non-oleaginous fluid forming a discontinuous phase; at least one emulsifier stabilizing an emulsion of the non-oleaginous continuous phase within the oleaginous continuous phase; and at least one viscosifier dispersed into the oleaginous continuous phase in a concentration of at least 4 ppb; wherein upon subjecting the wellbore fluid to shear rate of at least 10,000 s−1, the emulsion is disrupted and the non-oleaginous fluid contacts the at least one viscosifier, thereby solidifying the wellbore fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.