Floating plate back pressure valve assembly
US7108068B2 · kind B2 · utility
3Cited by
13References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2004 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Jan 15, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7436
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A back pressure valve assembly for use in a well casing string. The valve assembly comprises a housing with a stationary and a floating plate therein. The floating plate is moveable between an open position spaced from the stationary plate and a closed position engaging the stationary plate. Fluid flow downwardly through the valve assembly tends to move the floating plate toward the open position, and fluid flow upwardly through the valve assembly tends to move the floating plate toward the closed position. A finger or key may be used to prevent rotation of the floating plate with respect to the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.