Check valve for well stimulation
US8739887B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2012 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Jul 3, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7904
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Check valve assemblies operable to inject treatment fluids during stimulation operations are described. One check valve assembly includes a valve body defining an inlet, one or more discharge ports, and a cylindrical passageway fluidly communicating the inlet with the one or more discharge ports, the valve body further defining a valve body seat within the passageway. A valve cap is configured to be coupled to the valve body and defines an opening therein that fluidly communicates with the cylindrical passageway, the valve cap further providing a valve cap seat. A spherical piston is disposed within the passageway and movable between a closed configuration where the spherical piston engages the valve body seat and an open configuration where the spherical piston engages the valve cap seat and allows fluid communication between the inlet and the one or more discharge ports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.