Methods and apparatus for negating mineral scale buildup in flapper valves
US7896082B2 · kind B2 · utility
24Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2009 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | May 30, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods and devices for negating scale buildups on interior surfaces of a sliding sleeve valve housing above the flow tube. In some aspects, a wiper member provides additional clearance between the flow tube and housing to compensate for scale buildup. In other aspects, the interior surface of the valve housing is provided with a sleeve that is disposed between the interior surface of the valve housing and the general flowbore passing through the valve housing to protect the interior surface against scale buildup.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.