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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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. A circuit breaker, located between the power source and the transformer, protects the treatef from electrical power failures.
Gas or compressed air pressure offsets the spring tension holding the diaphragm in the closed position. Water levels are pre-set.
Ttreater the spreader emulsion rises upward toward the high-voltage, alternating-current, electrical grids.
The lower grid is charged with 15, 20, volts of electricity while the upper grid is grounded. This paper 1 presents the observations made based on the pilot tests and discusses their significance in establishing the operating envelope and practices for electrostatic treaters, 2 describes the design of a novel inlet spreader, 3 summarizes the performance of electrostatic treaters in two fields, and 4 provides several operating practices and correlations that can be used to predict performance.
The liquid passes over the fire tubes and is heated if heat is applied. The flow path electrostahic an electrostatic treater is the same as a horizontal treater. Rock Mechanics Symposium and 5th U. Since coalescence of droplets in an electric field is so dependent on the characteristics of the particular emulsion to be treated, it is unlikely that a general relationship of water droplet size to use electrostahic the settling equations can be developed. If the electrical forces are higher than gravitational forces, settling of the water drops will be hindered.
Free gas is released as emulsion strikes the hood or down-comer and rises to the top of the inlet section. Sheriff’s Encyclopedic Dictionary of Applied Geophysics, fourth edition.
Treaters Water Separator Droplet Size. The lower grid is not grounded and receives the electrical output from the transformer. Recommended steps for safely lighting a gas-fired electrostatic treater. Help to improve this page What’s this? Usually less chemical is required to treat a warm emulsion.
Heated emulsion rises and spills over a weir out of the inlet section. The burner flame should aim straight down the center of the firetube. However, for normal crude treating, where 0. The burner should come on and burn steadily for a long period of time rather than blasting on and off. It then travels upward across the firetubes and spills over a weir into the surge section. Oil, which has separated from the elecyrostatic, rises to the top of the treating section.
Emulsions and Electrostatic Treater Principles | SCIENCE PARK
Society of Petroleum Engineers Disciplines 6. If the burners remain on, the treater may overheat and be damaged, the lighter ends of the oil may be cooked off changing gravity, and oil volume will be decreased resulting in lost revenue.
The electrical system consists of a step-up transformer and two electrical grids electrodes. Advanced search Show search help.
Firetubes should be inspected at periodic electorstatic. When emulsion rises above a pre-set level in the surge section, the float rises with the emulsion and causes the dump valve to open, which allows oil to leave the vessel. The firetube is protected by a heat shroud to ensure that no free-water comes into contact with it, thereby treter fouling and ex- tending the firetube life.
Oil, water, and gas discharge lines must be equipped with controls. Contact Us Subscribe to newsletter How to contribute? Free water and treated water levels in the treater are maintained by water dump valves.