Test Separator

Test Separator

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Test separator is an indispensable device in the exploration and development of onshore and offshore oil and gas fields. It is mainly used in well testing, well clean-ups and other flow operations for efficient and safe separation and measurement of oil, gas and water. According to the form can be divided into horizontal, vertical and spherical. Our 3P Test Separators usually supplied with high-accuracy instruments, control and shut-off valves, piping and skid, and referred as Test Separator Package / Module / Skid. Separator vessel is equipped with internal components, such as inlet deflector, vane pack, coalescer, wave breaker, weir plates, and mist extractor. Separator modular unit can be used both in offshore or onshore, either in standalone item or part of the package, and designed to fit the trailer for ensure fast and effective mobility during operation. 

Our company's test separator adopts pressure controller, level controller and pneumatic control valve to achieve automatic control of pressure and liquid level of the metering separator, which can meet the well test requirements of various oil and gas fields. At present, it has been widely used in Changqing, Dagang, Jilin, Qinghai, Daqing and other oil fields in China and overseas oil fields such as Egypt, Myanmar, Algeria, Nigeria, Russia, and India, and has achieved good economic and social benefits.

The Test Separator is a highly efficient separator specifically designed for oilfield well testing applications. It employs advanced separation technology and processes to facilitate accurate fluid analysis and data acquisition. Renowned for its reliability, efficiency, and outstanding performance, our Test Separator has become the preferred equipment for major oilfield companies worldwide.

Our test separators are designed and manufactured in full compliance with international standards and are ASME certified. It has the following advantages:

1.Compact and reasonable structure design, integration of a variety of measuring instruments and control equipment;
2.Compatible with multiple control modes (direct + PLC + computer + DCS);
3.Multilevel security measures to ensure safe and reliable operation of the device;
4.In addition to standard products, we can also customize the most suitable design for customers according to their needs;
5.Reliable quality, which can be matched with components according to the customer's designated brand, such as instruments and valves;
6.It can meet GB, ASME, API and other national and industrial specifications at the same time.

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HC is committed to becoming an industry leader in oilfield equipment. Our facilities are certified with ISO, API and ASME standards. Feel free to contact us for efficient and economical solutions.

The test separators price will change randomly with factors such as production cost, transportation cost, international situation, exchange rate, market supply and demand of raw materials. HC aims to provide you with high quality and best price well test separator. 

If you are looking for a reliable, efficient, and high-performance well testing separator, HC will be your ideal partner. Our oil and gas separator provides accurate fluid analysis and data collection for oilfield well testing operations, enabling informed decision-making and improving operational efficiency.

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Test Separator Basic parameters

Separator can be designed as per client’s operation conditions depending on flowrate, temperature, pressure, working medium and other operation data. Most of the clients, prefer size of 42 in. x 10 ft. and pressure of 1440 psi, for well test operation. 

Design pressureVessel sizeLiquid Capacity


(L x W x H)


(L x W x H)

barMpainch x footcmBOPDftm

Test Separator Working Process

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  • Special design and certification for offshore operations.
  • Modular skid for onshore operation.
  • Durable internals .
  • Certified and reliable flow control valve and instruments .
  • Instrument gas scrubber .
  • Sample points for oil, gas, water and inlet medium.
  • High / Low alarm points and pressure relief valves.

Code & Standards

  • ASME Section VII, DIV 1
  • NACE MR0175
  • API 12J
  • UL, Exp
  • PED
  • CE
  • API 6A, API 6D
  • ANSI B31.3 Class M (H2S)


  • Exploration well testing
  • Extended well testing
  • Clean-ups and flowback operations
  • Multiphase flow metering

Horizontal Separator / Vertical Separator

According to the installation mode, the separator can be divided into horizontal/vertical installation, or indoor/outdoor installation.

The horizontal separator is built horizontally, in other words, as the vessel shell axis parallel to the ground. It is usually used for large liquid/gas ratio fluid treatment or liquid/liquid separation. Compared with vertical separators, there are longer horizontal sections for liquid flowing and shorter vertical sections for gravity separation of liquids with different densities. The horizontal separator requires a relatively large horizontal installation space, and its application is generally not affected by the field wind.
Horizontal separator can be used for test separator, production separator, two-phase separator, three-phase separator and special application separator.

The vertical separator is built vertically, which means the vessel shell axis is perpendicular to the ground. It is usually used for large gas/liquid ratio fluid treatment. Compared with horizontal separators, there are larger cross-sectional area for gas flowing and longer vertical sections for gravity separation of liquids from the gas. The vertical separator requires a relatively small horizontal installation space, but for very high or slender separator the field wind shall be considered.

Vertical separator can be used for test separator, production separator, two-phase separator, three-phase separator and special application separator.

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