Downhole fluid recirculation valve and method for recirculating fluid in a well
US8387710B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2009 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Mar 5, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/271
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole valve for insertion in a production tubing string permits recirculation of fluid pumped into the casing annulus. The valve includes a cylindrical housing defining an opening, an internal mandrel disposed within the housing, defining a central bore and defining an opening, a valve between the housing and the mandrel, wherein said valve opens to allow fluid communication from the mandrel central bore to the annulus space in response to a pressure differential between the mandrel central bore and the annular space, and biasing means for biasing the valve in a closed position. The valve may be set within a completion string by wireline techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.