Wireline retrievable injection valve assembly with a variable orifice
US9624755B2 · kind B2 · utility
6Cited by
23References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2015 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Nov 15, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wireline retrievable injection valve for an oil or gas well has an internal valve that is initially moved to open a flapper safety valve and also opens to allow fluid flow through the valve. The internal valve includes a sleeve that opens the flapper safety valve and shields the flapper safety valve from fluid. In this manner the flapper valve is protected from being caused to “flutter” or “chatter” due to pressure variations in the fluid flow, thereby damaging the seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.