Oil Treatment

KASRAVAND offers a range of crude oil dewatering and desalting technologies that cover most typical processing requirements depending on the salt level required. These include:

  • Free water knock out drums
  • Heater treaters
  • Dehydrators
  • Coalescers
  • Electrostatic desalters
  • Degassers

Following primary oil/water separation crude oil still contains residual amounts of water containing unwanted salts that need to be removed in order to avoid undesirable effects downstream such as fouling.

Automated Oil Treatment Packages are designed for gathering and treatment of fluids from oil producing wells by providing deep dehydration, desalting and oil vapor pressure reduction to achieve the required quality of marketable oil and that of separated water.


Crude oil handling capacity, MTA

0,3; 0,5; 1,0; 3,0; 6,0; 9,0

- Oil capacity, TPD (rated)

1000; 1600; 3000; 5000; 10000; 15000; 25000

- Gas capacity, mln.Nm3/day (rated)

0,1; 0,16; 0,3; 0,5;1,0; 1,5; 3,0

Water content in oil, % mass.

- Upstream

Up to 30

- Downstream

Up to 0,5

Quality requirements for commercial oil

As per GOST 51858-2002

Treated water content, mg/l


- oil products

Up to 40 (or lower as required by Client)

- solids

Up to 40 (or lower as required by Client)

Ambient temperature, 0С

from -60 to +85



The benefits and features of our electrostatic and mechanical treats include:

  • Low maintenance
  • Excellent turn-down performance
  • Adjustable for load and voltage resulting in high operational flexibility
  • Effective design means minimal chemical treatment

The advantages of our technology for Oil Treatment Units

We have designed fully integrated oil treatment trains consisting of two parallel process lines. These oil processing trains can be fabricated using separator vessels of drum or tubular design.

To accelerate the processes of gas separation, oil dehydration and water treatment, the vessel design incorporates internal devices such as coalescers, multiple deck settlers and other hydrodynamic devices and tools.

The philosophy applied to the process architecture, equipment configuration, the level of design and fabrication coupled with the specific know-how have been formulated as our “Express Technology”.

The Express Technology enables us to improve our project design and equipment performance two-or threefold versus the conventional (industry standard) technologies in terms of reliability, efficiency, metal consumption and capital costs.

Designing and building of the Oil Treatment Unit as a Process Train Package makes it possible to supply equipment as fully preassembled units to be commissioned sequentially in each phase, to ramp up oil treatment unit capacity incrementally as the field development progresses, and to spend construction funds more rationally.

The integrated design features an extensive range of equipment rated according to the characteristics of the product to be treated.

If the characteristics of the product are less demanding, we will be happy to propose a simpler design. For instance, light and medium crude oils can be dehydrated to marketable standards already in the first separation and dehydration stage with minimum or no heat input to assist the process and with minimal consumption of de-emulsifying reagents (up to 15-30g per ton of oil).