Integral multiple stage safety valves
US9133688B2 · kind B2 · utility
9Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2012 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Mar 30, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An integral multistage safety valve is designed to provide a second level of protection should a first stage fail. The valve may be used in oil and/or gas wells. The interior portion of the multiphase safety valve is designed so as to reduce turbulence and pressure loss through the valve when the valve is in an open position. The valves may be independently operable, or operable with a single control line. The multi-stage valve reduces the number of body joints required to construct two identical valves thereby reducing cost and potential leak paths and increasing reliability of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.