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Dualstream 1 Subsea

Dualstream 1 Subsea

Dualstream 1 is a solution for allocation or monitoring of 3-phase flow rates in gas condensate wells. It is typically used on a per well basis. Installed either in the Xmas tree, removable choke bridge, jumper or manifold. It is ideal for high GVF applications. By only deploying standard redundant sensor systems subsea, all flow computation is carried out topside ensuring minimum intervention during the life of the field.

  • Low Power
  • Compact
  • Vertical or horizontal installation
  • Fully redundant sensors
  • MODBUS/SIIS/IWIS Capable

Measurement Application
  • Improve Production
  • Reservoir management
  • Hydrocarbon Allocation
  • Hydrate Mitigation

  • Specifications +


    Measurement Technique
    Dualstream Venturi
    Proprietary PLR Algorithm

    Mechanical Specification
    Standard Line Sizes 2” through 14” Nominal bore to suit a variety of ANSI/API end connections
    Pressure Class API 5K/10K
    Process Temperature Range -20 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
    Orientation Horizontal or Vertical

    Operating Range
    Turn Down >8:1
    Gass Mass Fraction 80-100%
    Water Liquid Ratio 0-100%

    Performance (95% confidence level)
    Gas Mass Flow Rate ±2%
    Condensate Mass Flow Rate ±10%
    Water Mass Flow Rate ±1 am3/h

    Repeatability
    Gas Mass Flow Rate <0.40%
    Condensate Mass Flow Rate <2.0%
    Water Sensitivity ±0.2 am3/h

    Permanent Pressure Loss
    Pressure Loss Specific To Application (<1 bar)

    Subsea Sensors
    Solartron ISA SST range subsea sensors comprising
    • Venturi differential pressure sensor with diaphragm seals (gauge pressure as secondary variable)
    • PLR differential pressure sensor with diaphragm seals (gauge pressure as secondary variable)
    • Temperature

    Communication Options
    MODBUS, SIIS Level II (CANBUS) or IWIS

    Subsea Power Requirements
    24VDC < 10W
    (includes redundant sensors supplied as standard)

    Installation Requirements
    Horizontal or Vertical Installation

    Topside Data Acquisition
    Options include:
    • Dualstream Flow Computer (Safe Area)
    • Dualstream PC (Safe Area)
    • Dualstream PC (Hazardous Area)

    User Required Inputs
    Hydrocarbon Composition

  • Downloads +

  • Guidelines +


    Dualstream

    Oil and Gas Authority – Guidance Notes for Petroleum Measurement

    ISO 5167-4

    ASME MFC-19G-2008

  • Wet Gas Application Questionnaire +