Gas lift plunger having grooves with increased lift
US6200103A · kind A · utility
35Cited by
10References
8Claims
0Family size
Inventor
Key dates
| Filing date | Feb 5, 1999 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Feb 5, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/14
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A plunger in a plunger lift system in an oil and gas well includes circumferential recessed surfaces that define grooves spaced along the plunger body. A curved convex surface or radius is formed between the lower extent of each recessed surface and the plunger body, and a sharp edge or corner connects the upper extent of each recessed surface to the plunger body. The depth of the grooves decreases and the spacing between the grooves decreases from the bottom to the top of the plunger. The shape, sizing and spacing of the grooves improves plunger lift and decreases liquid loss during plunger lift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.