Shale stabilizer and method of use thereof
US4757862A · kind A · utility
18Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1986 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Aug 21, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/608
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Water-soluble copolymers which are essentially free of cross-linking are useful as shale stabilizers. These copolymers are random copolymers of a vinyl carboxamide monomer and a hydroxy-containing vinyl carboxylic ester. These shale stabilizers are added to a drilling fluid which is then circulated through a well bore whereby the shale stabilizers come in contact with the shale formation and inhibit hydration of shale to prevent sloughing thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.