Gas lift is a reliable artificial lift method used in oil and gas wells where natural reservoir pressure is insufficient for production. Two common techniques—continuous and intermittent gas lift—are selected based on well conditions and desired flow rates.
- Continuous gas lift involves a steady injection of high-pressure gas into the well to assist fluid flow. This method is ideal for wells with low to moderate production rates.
- Intermittent gas lift injects gas in timed cycles, creating pressure pulses that push slugs of liquid to the surface. It’s often used in wells with lower productivity or where continuous injection is not efficient.
Both methods inject gas through the tubing annulus, allowing it to enter the production tubing through gas lift valves. The gas reduces the fluid density and hydrostatic pressure, enabling oil or water to flow more easily up the wellbore. Gas lift systems can be optimized to make use of produced gas, improving overall field efficiency.
How Gas Lift Works
Gas lift works by injecting high-pressure gas into the well’s production tubing, typically through the annular space between the tubing and casing. The gas enters through a series of gas lift valves, where it mixes with the produced fluid.
As gas bubbles rise in the liquid column, they reduce the density and hydrostatic pressure in the tubing. This decreased pressure allows fluids to flow from the reservoir to the surface.
This method is particularly effective for wells:
- With low reservoir pressure
- Experiencing liquid loading
- That require artificial lift to maintain flow
Gas lift is also compatible with SCADA systems, enabling real-time monitoring and control for enhanced performance and diagnostics.
Benefits of Installing a Hydroplex Valve
Hydroplex CSX control valves offer advanced engineering for surface gas lift injection, ensuring durability, control, and ease of maintenance in demanding field conditions. Key benefits include:
- Robust Stem and Seal Design: Supports hundreds of thousands of reliable cycles
- High Repeatability Rate: Ensures consistent flow control in varied applications
- Twin Disc Design: Separates sealing and control surfaces for longer service life
- Direct Mount Actuation: Eliminates brackets, linkage, or adapters for precise control
- 90° Rotary Twin Disc Trim: Provides excellent resolution and control accuracy
- Internal Cartridge Assembly: Simplifies maintenance and component replacement
- Stainless Steel Internals: Delivers the longest mean time between service
- Chemical Injection Port: Built-in feature helps prevent freezing in colder environments
- Tungsten Carbide Trim: Minimizes wear on seals and control surfaces for maximum durability
Hydroplex valves are built for performance in continuous and intermittent gas lift systems, helping operators improve lift efficiency, minimize maintenance, and extend equipment lifespan.
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Improve your gas lift efficiency with a Hydroplex CSX Valve. Contact our team today for technical specs, installation support, or to request a quote.