Bypass valve for gas lift plunger
US6176309A · kind A · utility
49Cited by
7References
8Claims
0Family size
Inventor
Key dates
| Filing date | Oct 1, 1998 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Oct 1, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/121
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A bypass valve for a plunger in a plunger lift system in an oil and gas well is disclosed. The valve has a valve body, a piston and a spring. The pressure differential across the piston keeps the valve closed during the upstroke of the plunger. The spring opens the valve when the pressure differential decreases to below a selected value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.