Subsurface safety valve with uniform loading
US11661820B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2021 |
| Grant date | May 30, 2023 |
| Priority date | — |
| Expiry date | Nov 5, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A subsurface safety valve assembly that includes a valve housing comprising a valve seat with a circumference and a seat seal surface. The valve assembly also includes a flapper rotatably connected to the valve housing and comprising a flapper seal surface. The flapper is rotatable into sealing engagement with the seat seal surface in a closed position to form a circumferential surface-to-surface seal. The valve assembly also includes a dovetail groove cut into the seat seal surface or the flapper seal surface and a seal ring held within the dovetail groove and positioned to form a seal against the seal ring when the flapper is in the closed position. The seat seal surface, the flapper seal surface, the dovetail groove, and the seal ring are shaped such that the load on the seal ring is uniform around the seal ring when the flapper is in the closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.