Well flow control using delayed secondary safety valve
US11661826B2 · kind B2 · utility
2Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2021 |
| Grant date | May 30, 2023 |
| Priority date | — |
| Expiry date | Oct 7, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A flow control system for a well includes a primary safety valve and a secondary safety valve disposable within a valve body of the primary safety valve. The secondary safety valve may include a control line port for receiving control fluid pressure from the same control line as the primary safety valve. A choke in fluid communication with the control line port delays a closing of the secondary safety valve relative to a closing of the primary safety valve in response to a decrease in the control fluid pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.