PL Schematic Plunger Lift Systems consist of a plunger, often referred to as a piston, two bumper springs, a lubricator to sense and stop the plunger as it arrives at the surface, and a surface controller of which several types are available. Various ancillary and accessory components are used to complement and support various application needs.

In a typical plunger lift operation, the plunger cycles between the lower bumper spring located in the bottom section of the production tubing string and the upper bumper spring located in the surface lubricator on top of the wellhead. In some applications, the lower bumper spring is placed above a gas lift mandrel. As the plunger travels to the surface, it creates a solid interface between the lifted gas below and produced fluid above to maximize lifting energy.

The plunger travels from the bottom of the well to the surface lubricator on the wellhead when the force of the lifting gas energy below the plunger is greater than the liquid load above the plunger. Any gas that bypasses the plunger during the lifting cycle flows up the production tubing and sweeps the area to minimize liquid fallback. The incrementation of the travel cycle is controlled by a surface controller and may be repeated as often as needed.

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