Plunger lift system
US7188670B2 · kind B2 · utility
15Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2005 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Sep 23, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/143
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An intermittent lift plunger includes at least one seal mandrel, a bottom sub and an upper valve assembly. The valve assembly is closed by a well bottom stop which inserts into the lift plunger and opened by a lubricator stop at the top of the well. The seal mandrel includes a sleeve seal formed from an elastomeric rubber or plastic, which inflates to engage the well bore surface when the valve is closed and a pressure differential exists.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.