Plunger with multiple jackets
US7093652B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2002 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Apr 14, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B47/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A plunger for use in tubulars in wells which produce fluids and/or gases under variable pressure. The plunger has at least two separate jackets comprised of segments mounted about one body or bodies joined by a connector, which collectively have increased sealing, holding, and lifting capabilities. A inner turbulent or labyrinth-type seal is accomplished by circumferential grooves on the core and/or fingers which project inwardly from the underside of the segments. The plunger body may also have an internal passage to facilitate more rapid descent, and a simplified stopper housed inside a chamber which is actuated when the plunger reaches a well stop or well bottom and which is held in a closed position by the build up of pressure below the plunger. When the pressure inside the tubulars above the plunger is reduced, the plunger and fluids move upwardly to the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.