Compositions and methods for completing subterranean wells
US11091686B2 · kind B2 · utility
3Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2016 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Jun 26, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Well treatment compositions comprise water, a lipophilic anionic surfactant, a hydrophilic non-ionic surfactant, a second non-ionic surfactant, a water-solubilizing solvent, a water-immiscible solvent and a lipophilic non-ionic surfactant. Optionally, a second solvent may be incorporated. When added to spacer fluids, chemical washes or both, the compositions promote the removal of non-aqueous drilling fluids from casing surfaces. Additionally, the treated casing surfaces are water wet, thereby promoting optimal bonding to cement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.