Plunger Lift Systems provide operators with low installation and operating costs for producing oil and gas wells. They are designed to unload excess fluids from a gas well or to increase production on an oil well. Plungers are designed to surface as a solid interface between the fluid column and the lifting gas. There are a large number of surface arrangements being used successfully today to control fluid lifting perform-ance of the installation.

Plunger Lift is ideal for :(1) Improving the efficiency of intermittent gas lift. (2) Removing liquid from gas wells: (3) Producing high GOR wells/solution gas drive reservoirs; and (4) Prevent-ing paraffin and / or scale buildup.

One of the main objectives of a Plunger Lift installation on a gas producing well is to keep the area in the immediate vicinity of the wellbore as dry as possible. To perform this function when the formation is producing liquids along with the gas, the gas flow must be of sufficient velocity to deliver all liquids to the surface as they enter the wellbore.

The heart of the installation is the plunger itself, of which Parveen offers several designs to meet different well requirements. The plunger installed in the tubing string and becomes an interface between the fluid and the gases as it travels to the surface to expel accumulated fluid. The plunger movement is the result of a cyclic operation that creates a differential across the plunger. This is normally accomplished by opening and closing a motor valve with either a time cycle controller or other automated pressure actuated controller such as Electronic Controller.

Plunger Assemblies used for lifting the well's fluid production to the surface are basically very long stroking pumps. The plunger travels from the set depth of the stop to the surface lubricators, and repeats this operation as often as desired with the cycling increment being controlled by the surface controller.

The plunger is designed to surface as a solid interface between the fluid column and the lifting gas. When the plunger is actually travelling, there is a pressure differential across the plunger which will inhibit any fluid fallback. Therefore, the amount delivered to the surface should be virtually the same as the original load. The plunger travels from bottom to top, acting as a swab, removing liquids in the tubing string.

P Plunger features spring loaded expanding blades which seal against the tubing walls to create the pressure differential for the upward stroke. When the plunger is seated on the tubing stop, the internal bypass is closed and remains closed until the projecting pin strikes the top of the lubricator and is forced down, opening the bypass. This allows the plunger to fall rapidly.

K Plunger is a solid plunger with labyrinth rings to provide sealing. There is no internal bypass.

J Plunger features labyrinth rings with a large internal bypass area which allows the plunger to fall more rapidly. The slip ring at the top of the plunger moves down and effects a seal on the bypass ports as the plunger moves up the well. When the plunger begins to fall, the slip ring moves up, uncovering the ports, activating the bypass feature.

A-1 Bumper Spring is designed to seat on atubing stop or collar stop to arrest the fall of a plunger at the desired location. The large open area of the spring allows rapid fluid displacement as the plunger arrives. This design permits the plunger to operate properly.

SB-2 Bumper Spring is designed to absorb high impact forces and protect tubing stops and plungers in wells where impact occurs above the fluid load. The internal bar prevents any jarring or pulling forces from being exerted on the spring. It features a collet latch to secure it to the fishneck of a tubing stop.

L-1 Catcher is designed to trap the plunger at the surface. It consists of a spring loaded latch that is placed in the catch or release position by rotation of a cammed shaft. An optional arrival sensor is available to sense the plunger as it arrives in the catcher.

Flow Tee is used to connect the lubricator and catcher and allows for an alternate flow path.

Lubricator is designed to absorb the shock of the plunger arriving at the surface. It can be easily removed by hand to retrieve the plunger.

Tubing Stop is designed for installations using flush joint tubing. It does not use a collar recess for positioning and is installed and retrieved using standard wireline methods. Its purpose is to position the plunger and provide support for the bumper spring.