In modern oil and gas drilling, maintaining the integrity and performance of drilling fluid is essential for operational safety, wellbore stability, and cost control. Entrained gases—originating from formation influx, chemical reactions, or biological activity—can significantly reduce mud density, cause pump cavitation, and increase the risk of well control incidents.

The vacuum degasser is a key component of advanced solids control systems, designed to remove harmful gases from drilling fluid efficiently and continuously. As a professional solids control equipment manufacturer, KOSUN develops high-performance vacuum degasser systems that ensure stable fluid properties and reliable drilling performance in demanding environments.

Fundamental Principles of Vacuum Degasser Technology

The operation of a vacuum degasser is based on the relationship between pressure and gas solubility, described by Henry’s Law. Under high downhole pressure, gases such as methane (CH₄), hydrogen sulfide (H₂S), and carbon dioxide (CO₂) dissolve into drilling fluid.

 Inside the degasser chamber:
 * A vacuum pump creates a low-pressure environment.
 * Reduced pressure lowers gas solubility.
 * Dissolved gases separate from the fluid as bubbles.
 * An impeller or spraying device increases the fluid’s surface area.
 * Released gases are evacuated, and degassed mud returns to the system.

This continuous process:
 * Restores mud density
 * Prevents gas-cut mud
 * Protects pumps and downstream equipment
 * Enhances well control safety

System Integration and Operational Optimization

For optimal performance, the vacuum degasser must be properly integrated into the drilling fluid circulation system. The recommended position is:
 **After the shale shaker → Before desander or mud cleaner**

This configuration:
 * Removes fine entrained gases early
 * Prevents gas locking in hydrocyclones and centrifugal pumps
 * Improves overall solids control efficiency

Operational factors affecting performance include:
 * Vacuum level stability
 * Mud circulation rate (matching unit capacity)
 * Fluid viscosity and gel strength
 * Gas content severity

KOSUN provides technical support and system design guidance to ensure each unit operates at peak efficiency under specific field conditions.

Selecting the Right Vacuum Degasser

Choosing the appropriate vacuum degasser requires evaluation of:
 * Maximum mud circulation rate (GPM or m³/h)
 * Expected gas invasion conditions
 * Required vacuum level (inHg or kPa)
 * Fluid type (water-based or oil-based mud)
 * Environmental and corrosion considerations

KOSUN offers customized solutions, including:
 * Skid-mounted units for land rigs
 * Compact designs for offshore platforms
 * Corrosion-resistant materials for H₂S environments

Vacuum Degasser vs. Mud Gas Separator

Effective vacuum degasser operation provides:
 * Accurate mud density control
 * Improved wellbore stability
 * Prevention of pump cavitation and gas lock
 * Enhanced safety through H₂S removal
 * Reduced fluid loss and chemical consumption
 * Higher overall drilling efficiency

Maintenance for Long-Term Performance

Routine maintenance ensures reliable operation:
Clean degasser tank and internals regularly
Inspect vacuum pump oil, seals, and filters
Monitor impeller and motor condition
Check system sealing to maintain vacuum integrity

KOSUN provides after-sales service, spare parts support, and technical consultation to minimize downtime and extend equipment life.

With decades of manufacturing experience and global project support, KOSUN delivers high-performance vacuum degasser systems designed for efficiency, durability, and operational safety. From system design to after-sales service, KOSUN helps drilling contractors maintain stable fluid performance and achieve cost-effective operations.