Editorial Technical Reference

Degasser

This page explains how Degasser is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A device that removes entrained gases from drilling mud in a mud circulation system.

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Product Specifications

Technical details and manufacturing context for Degasser

Definition
The degasser is a critical component of the mud circulation system used in drilling operations. It functions to remove entrained gases (such as methane, hydrogen sulfide, or air) from the drilling fluid (mud) before it is recirculated. This process is essential for maintaining the mud's density and viscosity, preventing gas kicks, ensuring accurate wellbore pressure control, and protecting downstream equipment like pumps and shakers from gas-induced damage or inefficiency. The degasser is typically installed as part of the solids control system, often after the shale shaker and before the desander or desilter. It operates on a vacuum principle, drawing gas-laden mud into a chamber where reduced pressure causes dissolved gases to come out of solution and form bubbles. These bubbles rise to the surface and are vented safely, while the degassed mud is discharged back into the active system. Key parameters for selection include processing capacity, operating pressure, temperature range, motor power, voltage, frequency, vacuum degree, gas removal efficiency, noise level, weight, dimensions, ingress protection, and material of wetted parts. For medium-sized rigs, typical processing capacity ranges from 120 to 240 m³/h, with operating pressure between 0.6 and 1.0 MPa (above 1.0 MPa may damage seals), and operating temperature from -20 to 80°C (below -20°C rubber seals become brittle). Motor power typically ranges from 15 to 30 kW, with voltage 380–690 V AC and frequency 50–60 Hz. Vacuum degree is usually -0.06 to -0.08 MPa, and gas removal efficiency is 95–98% at rated capacity. Noise level is 75–85 dB(A) at 1 m distance. Weight ranges from 1500 to 2500 kg, and dimensions vary with capacity, typically 2000×1200×1500 to 2500×1500×1800 mm. Ingress protection is IP54–IP55 for outdoor installation, and wetted parts are made of SS304–SS316 for corrosion resistance. Materials on file include carbon steel and stainless steel for corrosive environments. Always verify model-specific values and standards with the legal manufacturer or supplier.
Working Principle
The degasser operates on a vacuum principle. Gas-laden mud is drawn into a chamber where a vacuum is applied, reducing the pressure. This pressure reduction lowers the solubility of gases in the mud, causing the entrained gases to separate and form bubbles. The bubbles rise to the surface of the mud within the chamber. The separated gas is then vented to a safe location (e.g., a flare line), while the degassed mud is discharged, usually via an impeller or pump, back into the active mud system for further processing or recirculation.
Common Materials
Carbon Steel, Stainless Steel (for corrosive environments)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Processing Capacity120–240 m³/hTypical range for medium-sized rigs
Operating Pressure0.6–1.0 MPaAbove 1.0 MPa may damage sealsGB/T 14041.1
Operating Temperature-20–80 °CBelow -20°C rubber seals become brittle
Motor Power15–30 kWHigher power for higher mud viscosityIEC 60034
Voltage380–690 V ACThree-phase, 50/60 HzIEC 60038
Frequency50–60 HzAuto-switching or manual selectionIEC 60038
Vacuum Degree-0.06–-0.08 MPaHigher vacuum improves degassing efficiency
Gas Removal Efficiency95–98 %Measured at rated capacity
Noise Level75–85 dB(A)At 1 m distanceISO 3744
Weight1500–2500 kgIncluding motor and base frame
Dimensions (L×W×H)2000×1200×1500–2500×1500×1800 mmVaries with capacity
Ingress ProtectionIP54–IP55For outdoor installationIEC 60529
Material of Wetted PartsSS304–SS316Corrosion-resistant for drilling mudASTM A240

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Vacuum Pump
    Creates and maintains the necessary vacuum within the separation chamber to liberate gases from the mud.
    Material: Cast Iron / Steel
  • Separation Chamber / Tank
    The vessel where the mud is subjected to vacuum, allowing gases to separate and rise to the surface.
    Material: Carbon Steel / Stainless Steel
  • Impeller / Mud Pump
    Draws gas-laden mud into the chamber and discharges degassed mud back to the system.
    Material: Hardened Steel / Alloy
  • Gas Vent Line Part
    Conducts the separated gases safely away from the unit to a designated venting or flare system.
    Material: Steel Pipe

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 150 psi (10.3 bar) operating pressure
flow rate: 100 to 2,500 GPM (380 to 9,463 L/min)
temperature: 40°F to 250°F (4°C to 121°C)
slurry concentration: Up to 18% solids by weight
Media Compatibility
✓ Water-based drilling mud ✓ Oil-based drilling mud ✓ Synthetic-based drilling mud
Unsuitable: Highly corrosive acidic environments (pH < 4)
Sizing Data Required
  • Maximum mud flow rate (GPM/LPM)
  • Gas content in inlet mud (SCF/bbl or m³/m³)
  • Required vacuum level (inHg or mmHg)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion and pitting
Cause: Exposure to corrosive fluids (e.g., seawater, acidic chemicals) and inadequate material selection or protective coatings, leading to wall thinning and perforation.
Mechanical seal failure
Cause: Wear from abrasive particles in the fluid, misalignment, thermal stress, or improper installation, resulting in leaks and reduced degassing efficiency.
Maintenance Indicators
  • Unusual vibration or noise from the degasser, indicating impeller imbalance, bearing wear, or cavitation.
  • Visible fluid leaks around seals, connections, or the vessel body, suggesting seal degradation or corrosion.
Engineering Tips
  • Implement routine ultrasonic thickness testing and corrosion monitoring to detect early wall degradation and schedule proactive repairs.
  • Use high-quality, compatible seals and ensure precise alignment during installation, coupled with regular lubrication and inspection of mechanical components.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ASME B31.3 - Process Piping PED 2014/68/EU - Pressure Equipment Directive

Quoted from the published standard.

Manufacturing Precision
  • Pressure Rating: +/- 1% of specified value
  • Material Thickness: +/- 0.5mm for critical components
Quality Inspection
  • Hydrostatic Pressure Test
  • Material Composition Verification via XRF Analysis
Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
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Frequently Asked Questions

What is the primary function of a degasser in a mud system?

The degasser removes entrained gases such as methane, hydrogen sulfide, or air from drilling mud to maintain proper density and viscosity, prevent gas kicks, and protect downstream equipment.

What are typical operating parameters for a degasser?

Typical ranges for medium-sized rigs include processing capacity 120–240 m³/h, operating pressure 0.6–1.0 MPa, temperature -20 to 80°C, motor power 15–30 kW, voltage 380–690 V AC, frequency 50–60 Hz, vacuum degree -0.06 to -0.08 MPa, and gas removal efficiency 95–98%.

What materials are commonly used for degasser construction?

Carbon steel is standard, with stainless steel (e.g., SS304–SS316) for wetted parts in corrosive environments. Always confirm material suitability with the supplier.

How should I verify that a degasser meets my requirements?

Check the nameplate and technical documentation for parameters like capacity, pressure, temperature, and standards (e.g., GB/T 14041.1, IEC 60034). Contact the manufacturer to confirm model-specific values and compliance.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Mud Circulation System
View system integration details

Industrial Ecosystem & Supply Chain Structure

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

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