Fluids and methods for mitigating sag and extending emulsion stability
US11555138B2 · kind B2 · utility
0Cited by
11References
6Claims
0Family size
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Key dates
| Filing date | Feb 26, 2018 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | Feb 26, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/062
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of drilling a wellbore includes pumping an oleaginous wellbore fluid into a wellbore, the oleaginous wellbore fluid including an oleaginous continuous phase; a non-oleaginous discontinuous phase; an emulsifier stabilizing the non-oleaginous discontinuous phase in the oleaginous continuous phase; an organophilic clay; a weighting agent; and a wetting agent having an HLB ranging from about 4 to 10.5 that it selected such that the oleaginous wellbore fluid has a 600 rpm dial value at 40° F. of less than about 300 and a 10 minute gel strength of less than about 40 lbf/100 ft2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.