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Casing (Annular) Flow

When tubing flow begins to restrict production, annular flow provides higher injection rates, improved output, and greater lift efficiency.
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What is Casing (Annular) Flow?

Casing (annular) flow is an effective solution for highly productive wells where tubing flow limits output. By injecting gas down the tubing string and producing fluids through the tubing–casing annulus, this method enables higher production rates when adequate gas injection capacity and surface facilities are in place.
Enables higher production rates beyond tubing limitations
Requires higher gas injection rates for efficiency
Ideal for highly productive wells seeking increased output
Designed for surface facilities that can handle increased fluid volumes
Optimized with a strategic hybrid gas lift approach
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How It Works

Understanding Casing (Annular) Flow

Unlike conventional tubing flow, annular gas lift optimizes high-rate wells by injecting lift gas down the tubing while producing fluids through the casing/tubing annulus. This method reduces flow restrictions and increases production efficiency, making it an essential tool for wells with high potential output.

The Flowco Advantage: Why Choose Our Casing (Annular) Flow Solutions?

Maximize Efficiency. Optimize Production. Trust the Experts in Gas Lift.

Field-Proven Expertise

Trusted by operators in high-production regions like the Permian Basin.

Advanced Design Optimization

Tailored casing flow solutions for maximizing efficiency.

Higher Production Capabilities

Unlocks well potential beyond tubing constraints.

Seamless Integration

Designed to work with hybrid gas lift setups.

Types of Casing (Annular) Flow Applications

Standard Annular Flow
Hybrid Gas Lift with Annular Flow
For highly productive wells requiring higher injection rates and fluid-handling capacity.
  • Optimized for high-flow reservoirs
  • Requires advanced surface facility setup
  • Works best with high-pressure injection systems
A combined approach utilizing intermittent and continuous gas lift to optimize production.
  • Enhances efficiency with intermittent injection cycles
  • Reduces inefficiencies found in conventional annular flow
  • Ideal for fluctuating reservoirconditions
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Compliance and Certification

Providing Data to Meet Compliance and Certification

Flowco's vapor recovery solutions are fully compliant with all relevant regulations, including EPA standards. Our systems have undergone rigorous testing and certification processes to ensure they meet the highest industry standards for safety and performance.
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“We went from manual mode to APEX auto-mode on a four-well hybrid pad in the Delaware Basin. Within 60 days, we saw a 27% increase in production and used 22% less gas. No additional hardware, no downtime.”

David R., Production Engineer
Permian E&P
Related Products and Solutions

Explore Related Flowco Solutions

In addition to vapor recovery, Flowco offers a range of complementary products designed to optimize your operations and reduce emissions.
Natural Gas Compressors
Emission Control Systems
Automation and Monitoring Solutions
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Want to learn more?

Talk to one of our experts today to learn more or request a personalized quote for your operation.
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