High performance foams for unloading gas wells
US7422064B1 · kind B1 · utility
10Cited by
7References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 2007 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Mar 5, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/13
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Mixtures of at least one nonionic surfactants and at least one ionic surfactant together with a gas create foams to aid the removal of produced hydrocarbon fluids from gas wells and pipelines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.