Method and composition for improving performance of aqueous and polymer based fluids at high temperatures
US7749941B2 · kind B2 · utility
4Cited by
16References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 24, 2003 |
| Grant date | Jul 6, 2010 |
| Priority date | — |
| Expiry date | Nov 3, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides aqueous based well drilling and servicing fluids containing a polymer viscosifier with enhanced thermal stability provided by a diacid or diacid salt preferably having about two to about eight carbon atoms, such as, for example, sodium oxalate. The invention also provides a method of enhancing the thermal stability of aqueous based well drilling and servicing fluids containing a polymer viscosifer by adding diacid or diacid salt to the fluids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.