MARK-QEO-TUV2 Certification_ASME
1) Two/Three Phase Seperator

• Three Phase Separator is a vessel designed to separate the gas that flashes from the liquid as well as separate the oil and water. 3 Phase separator is used when there is large amount of gas to be separaed from the liquid and the dimensions of the vessel are determined by the gas capacity. Three phase test separator is used to mechanically separate hydrocarbon stream the liquid and gas components that exist at specific temperature and pressure.

• Three phase separator design is important because separator is normally the intial processing vessel in any well testing and Early production facility. Improper design of Three phase separator can be a bottleneck and reduce the capacity of the entire well testing or Early production process facility.


• Downstream equipment's of Three phase separator cannot handle high proportion of gas- liquid mixtures. Generally three phase test separator or Production separator are designed to meet performance requirement of below 1% basic sediment and water content.

• Gas and liquid separators are classified as Three phase separator, Two phase separator, Free knock out drums, Flare KO drum, Production separator, degassers, this can be either Horizontal or Vertical.

• Increase in performance of three phase separator is achieved by steady state equilibirium condition. Steady state conditions are achieved in three phase separator, two phase separator, production separator by proper control systems on the skid mounted packages.

• In well testing industry, below standard three phase test separators are commonly used.

  • 42 “ x 10 ft 1440 PSI Test Separator
  • 42 “ x 15 ft 1440 PSI Test Separator
  • 48” x 10 ft 2160 PSI Test Separator
  • Custom built Three phase separator also available upon request

• Three phase separator design is basically based upon fluid flow rate , temperature , pressure and fluid properties.

• Test separators are designed considering 1 min retention time. Where as in early production or production facility the retention time will be based upon crude oil properties which is varying from 3 mins to 30 minutes.

• VERPL(Vi Energ resources private limited ) three phase separators are packaged in modular skids with pipings and control systems. Skid can be either CSC certified or DNV Certified.

• Major Factors effecting Three phase separator design are Gas /liquid flowrates, operating & design consitions, surging or slugging tendency, physical properties, presence of impurities, foaming tendencies, corrosive tendencies, etc.

• Three phase test separator consist of four sections Inlet diverter section, liquid collection section, Gravity settling section and Mist extractor section.

• Our skid mounted Three phase test separator packages are assembled with liquid dump valve regulated by level controller to maintain steady state liquid level and steady state pressure of three phase separator is controlled by pressure controller with pressure control valve. Which directly impact in performance of the separator.

• We choose proper internals based upon fluid properties and client requirements to optimize three phase separator design.


2) ViENERG's - Indirect Water Bath Heater

**Pressure may be either 5000 PSI (5K) , 10000 PSI (10K), 15000 PSI (15K).

• Indirect water bath heater are sometimes called line heaters. Indirect fired water bath heater /Line Heaters is the process equipment need to prevent hydrates. Hydrates are often formed during depressurization or sudden decrease in pressure. Hydrates are poison which will block and damage downstream equipments , valves and instruments.

• Indirect fired heaters /Line heaters heat the gas stream before and / or after the choke so that the gas is maintained above the hydrate temperature. Indirect fired water bath heater / Line Heaters can be used to heat crude oil for treating, heat a hot fluid circulating medium. Most common equipment type used to heat a well stream is the indirect fired water bath heater/Line heater.



• Indirect fired water bath heater/Line Heater is used to maintain or increase above 120 deg F, which is well above hydrate formation temperature for LTX.

• In fire tube Indirect fired water bath heater/Line heater, the coils are immersed in a bath of water, the water is heater by fire tube that is in the bath below th coils. That is fire tube in indirect fired water bath heater(Line heater) provides heat flux that heats the water bath. Indirect fired water bath heater(Line Heater) exchanges heat by convection and conduction to the process fluid. On other hand, instead of fire tube the electrical immersion heaters are used to heat water bath in indirect fired water bath heater/Line heater. Fire tubes in indirect fired water bath heater (Line heaters) are by far most common source of heat.

• Limitation in indirect fired water bath heater /Line heater is bath temperature to 190 deg F to avoid evaporating the water, if higher temperature are needed, glycol can be added to the water in indirect fired water bath heater/Line heater.

• Purpose of indirect fired water bath heater/Line heater is to prevent hydrates from forming downstream of the heater, the outlet temperature will depend on the hydrate formation temperature of gas. The coil size of a indirect fired water bath heater/Line heater is depends onn the volume of fluid forming through the coil and the required heat duty.

• Some of standard Indirect fired water bath heater equipment used in well testing industry is.

  • 1.5 MMBTU /HR Line Heater
  • 2 MMBTU /HR Water bath heater
  • 3 MMBTU /HR water bath heater

**Pressure may be either 5000 PSI (5K) , 10000 PSI (10K), 15000 PSI (15K).


3) ViENERG's - 10K Psi Dual POt Sand Filter

• A dual pot sand filter is a screen based process system, providing a cost effective and low maintanence solution for the separation and removal of solids.Dual pot sand filters are pressure drop dependant, inlet and outlet pressure difference measures the sand accumulation and cleaning requirement notification.

• Sand production in production line causes mechanical damage & erosion to chokes, flow lines, control valves, pumps and other downstream ancillaries. Further effect on reduced equipment capacity , failure of ancillaries, eratic readings of instruments and high environmental discharges.

• Solids handling is an increasingly important task to reduce the project


• Production of sand and solids from oil and gas wells is a poison for drilling activities and processing facilities , Sand production is mainly due to failure of gravel packing and other sand control measure activities.

• Dual Pot sand filters are available in many sizes, typically 200 microns screen is widely used one.

• Added advantages are no moving parts, low maintanence and avoiding downtime because of one working and one stand by, result in significant capital and operating cost savings

• Dual pot sand filters avoid shut in process of oil wells. Provides solids removal before oil contamination and removing sludge accumulation and other difficult problems.


4) ViENERG's - Surge Tank | Storage Tank

Well Testing & EPF Equipments

• Surge tank is otherwise called calibration tank(Gauge tank).Vienerg is manufacturing standard and custom build surge tanks which is widely used in well testing industry. Surge tank or Gauge tank is alternative method for measuring shrinkage factor of produced crude oil. During production in well testing industry oil from test separator is diverted to the surge tank (Gauge tank), recording both surge tank (Gauge tank) volume and the corresponding separator meter volume at the start and end of the transfer. The oil in the surge tank (Gauge tank ) is left untouched for a period to allow entrained gas to vent off. When further volume reduction occurs, the final surge tank (gauge tank) volume and the temperature are recorded. Which is used to calculate shrinkage in crude oil volume


• Surge tank plays important role in calibrating flow meter which is working in upstream test separator package. Vienerg manufactures following standard equipment.

  • 50 BBL Single compartment Surge tank
  • 80 BBL Single / Twin compartment surge tank
  • 100 BBL Twin compartment vertical surge tank
  • 100 BBL single compartment rectangular atmospheric gauge tank
  • 200 BBL twin compartment rectangular atmospheric gauge tank

**All the units are skid mounted in either CSC skid frame or 20 ft DNV certified skids as per client requirements.