Multi-drop flow control valve system
US7331398B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2005 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Feb 16, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86928
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A multi-drop flow control valve system having a plurality of hydraulically actuated flow control valve, each valve set in an initial operating position. The flow control valves are connected to a hydraulic control line in sequence, wherein the second flow control valve is below the first flow control valve and so on. Wherein a first hydraulic pressure in the control line will operate at least the first flow control valve to an actuated position and a second hydraulic pressure greater than the first hydraulic pressure will operate at least the first and second flow control valves to actuated positions. It may be desired for each of the control valves to be biased in the initial position when the hydraulic pressure is less than a base pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.