Flow control apparatus and method
US4782847A · kind A · utility
7Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1984 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Aug 6, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0391
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Apparatus, and method, for controlling the flow of dilute solutions of polymers such as dilute aqueous solutions of partially hydrolyzed polyacrylamides without causing any significant degradation of the polymer comprising the solutions. In one embodiment, the apparatus comprises a plurality of fixed restrictions connected in series with nipples having a larger internal diameter than the fixed restrictions. In another embodiment, the apparatus comprises at least one fixed restriction in communication with a flow control valve such as a needle valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.