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OilPro Oilfield Production Equipment Ltd.

403 215 3373

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An oil treater’s main function is to make pipeline quality oil. It is used to separate water and gas from oil-water emulsions. Used widely in oil production since the 1940’s, treaters are essentially a low pressure, heated separator vessel with a variety of styles including vertical treaters and horizontal treaters, from bucket-style end-controls designs to side-controls multi-compartment designs with options for coalescing sections, internal packing, and single and dual polarity electrostatic sections, as emulsions warrant.

OilPro is the EU and Middle Eastern officially authorized representative for Sivalls, Inc., Sivalls has been designing and manufacturing oil treaters since 1947 along with other equipment for the oil & gas business.

Let’s take a closer look at treaters including what they are, how to select one, things to consider during purchase and why to consider OilPro when you require one.

What is a treater?

A treater is a heated pressure vessel designed to treat an oil-water-gas emulsion to provide pipeline quality oil using heat and pressure to make pipeline quality oil.

Selection criteria for a treater or heater treater

Treating systems have long been one of the most expensive and troublesome of all lease surface equipment. Also, there has been little data available for accurately sizing treating equipment, and as a result, treating equipment is frequently over or undersized.

Selection of the best type of treating system and accurate determination of sizes required can save considerable expense.

Here are some criteria to think about when choosing a treater:

  • Tightness of the emulsion
  • Specific gravity of the oil and produced water
  • Corrosiveness of the crude, oil, produced water and casing head gas
  • Scaling tendencies of the produced water
  • Quantity of the fluid to be treated and percent water in the fluid
  • Availability of sales line for the casing head gas produced
  • Desirable operating pressures for equipment
  • Paraffin and asphaltene presence in the crude oil 

Considerations when choosing a treater

Where large amounts of free water are produced with the crude oil, such as in secondary recovery installations, it may be desirable to install free water knockouts ahead of the treating system.

Free water knockouts separate large amounts of free water from the crude oil emulsion and so offer advantages in reducing the size of downstream treating equipment and the amount of heat and fuel required.

Free water knockouts are often recommended where the incoming emulsion water cut exceeds 30% of total volume. As Free Water Knockouts are typically sized according to inlet temperature and separating free water takes less time.

FWKO’s tend to be smaller relative to total processed volume with retention times ranging in the 10-35 minute range vs the recommended treater retention time of 60-120 minutes. Sivalls has pioneered combination units with a built-in free water knockout section inside a treater as well.

Choose OilPro to discuss a treater that suits your process conditions

We can recommend the optimal treating equipment from vertical to horizontal treaters and cold or heated free water knockouts, while taking into account the key factors of ambient conditions, retention time, heat required, specific gravity and viscosities as well as chemical makeup of your emulsion to treat you right!

OilPro is the EU and Middle Eastern representative for Sivalls who has equipment installed around the world including the following countries:

  • Argentina
  • Australia
  • Bolivia
  • Canada
  • Colombia
  • Ecuador
  • Egypt
  • Gabon
  • Kuwait
  • Libya
  • Mexico
  • New Zealand
  • Nigeria
  • Pakistan
  • Qatar
  • Russia
  • Taiwan
  • Thailand
  • UAE
  • USA
  • Venezuela

Sivalls has experience designing and building treaters dating back to 1947 which is why OilPro proudly reps them.

Sivalls Treaters From OilPro

Here are some examples of treater projects we’ve worked on.

Sivalls vertial cold weather treater

Sivalls vertical treater with an internal, adjustable under pressure siphon, packaged for low temperature operation.

sivalls vertcial Type F treater ready to export to India

Sivalls FCW vertical treater skidded for export shipment.

HT830-2.5 MM Horizontal treater

Sivalls HT 830, 2.5 MMBTU/hr firetube packaged for a Canadian cold weather location complete with insulation and end-controls house and skid.

You can visit our main treaters page on the OilPro website, too.

If you’d like to learn more about Sivalls products from OilPro, contact us directly at 403 215 3373 or by email at [email protected]

Here’s a short video of Sivalls’ capabilities and OilPros’s relationship with them.


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