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Solartron ISA
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  5. Dualstream 1 Subsea

Dualstream 1 Subsea

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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.

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

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