Apparatus and method for activation of flapper check valve
US11261980B2 · kind B2 · utility
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37References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 12, 2021 |
| Grant date | Mar 1, 2022 |
| Priority date | — |
| Expiry date | Mar 12, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7902
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A flapper check valve employed to prevent flow up the work string while allowing flow down the work string and into the well is disclosed. The check valve is activated by a compression spring, which then acts on a ball which will further act on a cam profile attached to the back of a flapper. The apparatus causes the flapper to default to the closed position when the flow is stopped, regardless of the position of the valve, even when gravity is acting against the flapper. The compression spring also allows for an apparatus which possesses lower operating stresses on the spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.