Tubing hanger shuttle valve
US8746350B2 · kind B2 · utility
2Cited by
6References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2010 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Jan 26, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellhead assembly made up of a wellhead housing, a production tree mounted on the wellhead housing, tubing suspended into a wellbore from within the wellhead housing, and an annulus between the tubing and the wellhead housing. A shuttle valve is provided within a tubing hanger that supports the tubing from within the wellhead housing. An accumulator is disposed in the annulus that is in fluid communication with a closed position port on the shuttle valve. Pressure is maintained in the accumulator for closing the shuttle valve when a force for opening the valve is removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.