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Dualstream Venturi

The Original Wet Gas Metering System

Dualstream Venturi is a low CAPEX solution for allocation or monitoring of gas flow rate. It is typically used on a per well basis where well testing facilities exist or can easily be deployed. Common applications include tie-ins to existing infrastructure or large multi-well fields where production fluids remain relatively constant throughout field life.

Generally used in combination with test separators, tracer dilution techniques or Solartron ISA flow meters.

  • Uses existing infrastructure
  • Low CAPEX
  • Uncomplicated & Robust
  • Operator Maintenance
  • Industry Standard Computer
  • Large Installed base

Measurement Application
  • Royalty allocation
  • Flow line monitoring

  • Specifications +


    Measurement Technique
    Dualstream Venturi
    Wet Gas Correction Algorithm
    Liquid fraction from well test

    Mechanical Specification
    Standard Line Sizes 2” thro 24” Nominal bore
    Pressure Class ANSI Class 300# to 2500# (API ratings on request)

    Process Temperature Range -40 to 120°C
    Meter Body Material Duplex UNS31803 as standard

    Alternate pressure ratings (ANSI/API 15K), temperature rating, sizes and material available on request

    Installation Requirements
    Horizontal installation (vertical on request)

    Upstream straight length: 3D to 10D typical (calibrated spool available for allocation systems)

    Downstream straight length: None
    (5D calibrated spool available with thermowell for allocation systems)

    Compact flow meter design options are available for applications where installation envelope is restricted, please contact for details

    Operating Range
    Turndown: >8:1 typical
    Gas Mass Fraction: 50-100%
    Water Liquid Ratio: 0-100%

    Typical Performance
    Uncertainty (95% confidence level):
    • Gas mass flow rate <5%
    • Liquid mass flow rate from well test

    Typical Repeatability
    Gas Mass Flow Rate 0.15%

    Instrumentation
    Standard field instrumentation comprising:
    • Differential pressure
    • Gauge pressure
    • Temperature

    Data Acquisition
    Options available include:
    • Dualstream Flow Computer (safe area)
    • Dualstream PC (safe area)
    • Dualstream PC (hazardous area)

    User Required Inputs
    • Hydrocarbon Composition
    • Compositional Data
    • Liquid Density
    • Liquid Fraction (from well test)


    For full specification see datasheet

  • Application Notes +

  • Guidelines +


    Dualstream

    Oil and Gas Authority – Guidance Notes for Petroleum Measurement

    ISO 5167-4

    ASME MFC-19G-2008

  • Wet Gas Application Questionnaire +