Plunger Lift is one of the artificial lift methods that use well's natural energy to lift the fluids. It is mainly used to de-liquefy (water, oil, wax etc) in a natural gas well. The underlying principle of the Plunger Lift is a plunger/piston inside the production tubing that travels up and down. It uses reservoir pressure build-up and rise and gravity forces, to come back to the bottom. This is achieved by shut-in and flow periods that open / close the shutoff valve down-hole with the predetermined time intervals. The system is entirely mechanical.
Modern days, multistage plunger lift equipment may take the technology to a higher operating envelope. The Plunger Lift method is widely used to produce fluids in the fields that have a significant amount of natural gas. Application of the Plunger Lift is limited to less than 5,000 B/D productions.
Plunger Lift system consists of:
- Down-hole assembly
- Control section, lubrication at the surface
- Surface arrival sensors
- Flow chokes
- Solar panels