Copolymer for shale stabilization and method of use
US8889602B2 · kind B2 · utility
1Cited by
2References
6Claims
0Family size
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Inventor
Key dates
| Filing date | Jun 23, 2009 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Mar 27, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Embodiments disclosed herein relate to methods for stabilizing shales while drilling a wellbore into an earthen formation comprising circulating an aqueous based wellbore fluid in the wellbore while drilling through shales; wherein the aqueous-based wellbore fluid comprises a copolymer of acrylamide-type comonomers and at least one cationic comonomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.