SU1549553A1 - Installation for combined preparation of petroleum and water - Google Patents

Abstract

The invention relates to installations for the joint treatment of oil and water and can be used in the oil and petrochemical industry. The purpose of the invention is to reduce the cost of oil preparation, improve the quality of water and oil and simplify the design. The installation includes a separator, a settling tank with nozzles for oil withdrawal and water withdrawal, a buffer tank in the form of a vertical column with an oil receiver installed above each other, a horizontal tubular oil distributor, a horizontal tubular water distributor and a water inlet. A continuously renewed oil layer is formed in the upper part and a water layer in the lower part of the tank, allowing for combined flushing of oil, purification of formation water and degassing of oil and water. 1 il.

Description

The invention relates to oil and water treatment systems and can be used in the oil and petrochemical industry.

The purpose of the invention is to reduce the cost of oil treatment, improve the quality of water and oil and simplify the design.

The drawing shows the setup of the joint preparation of oil and water.

The installation includes a separator 1 with nozzles for introducing production of oil wells 2, outputting a water-oil emulsion 3 and withdrawing associated petroleum gas 4, a sump 5 with nozzles introducing a water-oil emulsion 6, withdrawing oil 7 and withdrawing water 8, a buffer tank 9 made in a vertical column with a bottom outlet pipe for purified water 10 and one above each other above the branch pipe 10 oil inlet I, water inlet 12, oil outlet 13 and gas outlet 14, oil pump 15 and water pump 16.

The nozzle 2 of the separator 1 is connected to the inlet pipe 17, and the nozzle 3 to the pipe 18 with the nozzle 6 of the settling tank 5, the nozzles 7 and 8 of which are connected respectively by pipelines 19 and 20 to the nozzles 11 and 12 of the buffer tank 9.

The nozzles 10 and 13 of the buffer tank 9 are connected respectively by pipelines 21 and 22 to the inlet of pumps 6 and 15. The outlet of the pump 15 is connected to the oil pipeline 23, and the outlet of the pump 16 is connected to the water pipeline 24.

In the lower part of the tank 9, a water intake 25 is installed, connected to the pipe 10. A horizontal tubular oil dispenser 26 with perforations 27 in the upper part, connected to the pipe 11, a horizontal tubular water dispenser 28 with perforations 29 are installed above the water intake 25. the lower part connected to the pipe 12, and the oil receiver 30 connected to the pipe 13.

The installation works as follows.

The production of oil wells, which is a gas-water mixture, according to (/

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steps through supply pipe 17 through pipe 2 into separator 1. In separator 1, the product is separated from free gas, which leaves the separator 1 through pipe 4. From separator 1, the product separated from free gas enters through pipe 3 and through pipe 8 enters through pipe 6 to the sump 5. In the sump 5, the water-to-oil mixture is separated during gravitational sludge into oil and water, while water, as a heavier fluid, accumulates in the lower part of the sump 5, and oil as the lighter fluid — at the top. From the sump 5 water flows through the pipe 8 and through the pipeline 20 flows through the pipe 12 of the tank 9 into the distributor 28, and the oil through the pipe 7, the pipe 19 and the pipe 11 enters the distributor 26.

The liquid level in the tank 9 is maintained above the oil receiver 30, and the interfacial oil-to-water level is maintained between the distributors 26 and 28.

The water leaving the perforation 29 of the distributor 28 in the form of globules down passes through the oil layer, which acts as a hydrophobic liquid filter. In this case, the water globules are freed from emulsified oil and mechanical impurities that move upwards. The water filtered in the hydrophobic medium settles in the lower part of the tank 9 and through the water intake 25 and the nozzle 10 goes through the pipeline 21 to the inlet of the pump 16. The pump 16 pumps water into the noisy water pipeline 24.

The oil coming out of the perforations 27 of the distributor 26 in the form of globules upwards passes through a water layer that acts as a hydrophilic liquid filter. In this layer, the oil globules are released from free water, which, together with the salt, is transferred to a hydrophilic medium. The oil globules, when floating up in an aqueous (hydrophilic) medium, filter the small droplets of oil and hydrophobic solids contained in this medium.

The gas that escapes from both water and oil in the buffer tank 9 emerges in the form of small bubbles upwards, carrying oil and solid impurities. The oil is dehydrated and desalted in the tank 9 and goes to the oil receiver 30 and through the pipe 13 via the pipeline 22 enters the pump 15 entrance. The pump 15 pumps the oil into the oil pipeline 23.

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In the proposed installation of joint preparation of oil and water as a result of accumulation and continuous updating in the lower part of the buffer capacity of formation water, and in the upper part of oil, this capacity acquires a new property not inherent in buffer capacities, namely, being simultaneously a buffer vessel. with a capacity for both oil and water, it provides an increase in the quality of oil by washing the oil globules in the formation water layer and an increase in the water quality by extracting hydrophobic particles from the water globules in the oil layer.

The use of a buffer tank as a settling tank with hydrophobic and hydrophilic liquid filters allows desalting oil during its deep dehydration, achieving a higher degree of purification of produced water from suspended solids and emulsified oil, as well as simplifying the design of a joint preparation of oil and water by eliminating the sump and buffer tank for water.

Combining the processes of washing the oil, 5 cleaning the formation water with degassing the oil and water in the buffer tank provides a more complete use of the volume of the buffer tank and carrying out the cleaning of the formation water without using autonomous water treatment systems. 0

Claims (1)

Invention Formula A joint oil and water treatment unit, including a separator connected by pipelines, a sump with water and oil outlets, a buffer tank, an oil and water pump, characterized in that, in order to reduce the cost of oil preparation, to improve the quality of water and oil and simplification of the construction Day; the buffer tank is made in the form of a vertical column and is equipped with an oil receiver connected to the oil pump, installed in the upper part of the vessel, connected to a water pump in the bottom her 5 parts of the tank, horizontal tubular distributors of water and oil, installed one above the other in the central part of the tank and connected respectively to the water and oil outlet pipes from the sump, while the water distributor 0 is perforated in the lower part, and the oil distributor in the upper part. # 23