Pressure equalizing plunger valve for downhole use
US6848509B2 · kind B2 · utility
27Cited by
12References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 25, 2002 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Sep 25, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An equalizer valve for a flapper in an SSV has one embodiment where the plunger body is covered with a lubricious material in the bore in the flapper to counteract wear caused by off-center contact with the plunger by the flow tube. In another embodiment the flow tube and the plunger have matching angled surfaces to reduce the resultant moment of the plunger from offset contact of the flow tube. In another embodiment the flow tube contacts the plunger on center to eliminate a resultant moment, which can cause wear in the flapper bore or to the plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.