Fluid composition comprising glass microspheres and method of making and using the same
US9725636B2 · kind B2 · utility
1Cited by
20References
13Claims
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Key dates
| Filing date | Oct 28, 2011 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Jun 29, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is provided aqueous fluids comprising a mixture of at least two polysaccharides, water, and glass microspheres having pacified surfaces. There is also provided a method for making a fluid the method comprising (a) selecting a plurality of glass microspheres having alkaline surfaces; (b) coating the surfaces of the plurality of glass microspheres with an acid; and (c) combining the coated glass microspheres with (i) a mixture comprising at least two cross-linkable polysaccharides, and (ii) water. The fluids are useful, for example, as a drilling fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.