Whether expanding, upgrading, or constructing a new facility, Schlumberger advanced process technology is the solution to your difficult treating needs. The NATCO DUAL FREQUENCY electrostatic treater, used as a dehydrator and desalter in upstream crude oil processes, employs both AC and DC power to. Abstract Electrostatic treaters have been used at various Shell fields to dehydrate light, medium, and heavy crudes. The performance and operating envelope of.

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Electrostatic treaters are similar to epectrostatic heater treaters in design and operation. Inside the treating section, a flow spreader ensures uniform distribution of emulsion. Therefore, the firetubes need to provide less heat. Since electrostatic treaters operate under pressure, they should be equipped with pressure relief devices that have enough capacity to protect the treater if pressure increases.

Electrostatic treater – OilfieldWiki

Please post helpful feedback. Some treaters have a heat exchanger installed on the inlet line. Abstract Electrostatic treaters have been used at various Shell fields to dehydrate light, medium, and heavy crudes. In warmer climates, heating may be necessary only in colder months.

Since most emulsions being treated contain a certain amount of sludge and solids, the firetubes should be checked for corrosion, rust and accumulation of scale. Treaters Water Electrostqtic Droplet Size. A fused disconnect at the power source is recommended for maximum safety. As the emulsion continues to rise, it flows through a spreader which disperses emulsion along the length of the firetubes.

When there is not enough entrained gas in the incoming fluid to maintain necessary pressure, a make-up gas line is usually connected to the gas equalizer. Advanced search Show search help.

Temperature Effects on Separation Process. Gas leaving at the top of the treater is controlled by a gas back-pressure valve which controls the pressure in the treater.


If used, incoming emulsion is preheated by the heat of outgoing oil. This is because the high water content tends to produce over-stressing of the electrical coalescer due to a direct conductive path between the electrodes, which can electrosgatic the grid to short out and become non-functional.

The stretching of the water droplets tends to distort the film between the water droplets, causing it to rupture, thereby enhancing coalescence.

The produced fluids enter the treater and trater gas is vented. Log in to your subscription Username. Introduction Electrostatic dehydration of light, medium, and heavy crudes has been used at various Shell fields, particularly in electrostaticc Gulf of Mexico, West Texas, and California.

Electrostatic treaters operate under working pressures of 5 to 50 psi. A yellow flame with just enough air to keep from forming soot is best. As electrkstatic emulsion passes through the electrical field the water droplets in the emulsion become electrically charged and they move about rapidly electrostatc collide with one another.

An oil-water emulsion enters the treater flowing through an integral inlet heat exchan- ger where it is preheated thereby reducing the thermal load on the firetube and reducing fuel gas consumption.

The burner flame should aim straight down the center of the firetube. Other types of oil and water dump valves may be used on electrostatic treaters.

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Water levels are pre-set. Did you find what you were looking for? Oil, which has separated from the water, rises to the top of the treating section. Electrosyatic or compressed air pressure offsets the spring tension holding the diaphragm in the closed position. The electrostatic grid polarizes the conductive water molecules thereby forcing them to coalesce into larger particles and settle out of the crude. No clean oil leaves the treating section unless an equal amount of fluid enters the surge section.

This is controlled by a float in the surge section which is mechanically linked to the oil electrostatid valve.


Electrostatic treaters — Kocken Energy

As heated emulsion rises through the electrostatic field, water droplets are given an electrical charge, which causes them to become elongated and polarized. When the emulsion returns to the pre-set level, the dump valve closes and allows oil to accumulate in the treating section. The main difference between the two units is the electric coalescing section in the electrostatic treater which replaces the hay section in the electrotsatic treater. Heated emulsion rises and spills over a weir out of the inlet section.

The water droplets coalesce into larger droplets and settle to the bottom of the treating section for rlectrostatic. Figure illustrates a typical design of a horizontal electrostatic treater.

Recommended steps for safely lighting a gas-fired electrostatic treater. Here the free gas is spun upwards out the center of the vortex and the liquid emulsion flows downward and exits below the fire-tube in the free-water knock-out section of the treater.

In a water-in-oil emulsion with a high content of dispersed water, insulating the electrode may be necessary. Most free water in the emulsion quickly settles out and the remaining lighter liquids move upward through the water, which serves as a heated wash. Proceedings of an international conference Diverless and Deepwater Techology: Most electrostatic treaters have a reac-tance type transformer which has a reactor to protect the transformer from power surges and high voltage dispersion.

Electrostatic Treaters Process

Proceedings of an International Conference Submersible Technology: Rock Mechanics Symposium and 5th U. This action ensures maximum use of the firetubes for heating emulsion. Both water dump valves operate by means of Interface level controllers which use electrostaric or compressed air to open and close the dump valves.