Method for reducing pressure drop in the transportation of drag reducer
US4881566A · kind A · utility
35Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1988 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Oct 11, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0391
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Method for reducing pressure drop in a conduit carrying a viscous drag reducing material by injecting a lower viscosity liquid which is immiscible with the drag reducing material at the periphery of the conduit to form a flowing annular layer of such lower viscosity liquid thereby reducing the pressure drop in the conduit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.