Installation for water treatment in the oil fields

 

The invention can be used in the oil fields. The installation includes the technological capacity of the pipeline to supply water for cleaning and pipes for removal of gas, water and oil. Provides performance improvements installed at the expense of more intensive separation of impurities from the incoming wastewater. The inventive device bottom part technological capacity divided by partitions into the zone of accumulation and discharge of water, the zone of accumulation and discharge of oil and the Central settling zone. In the last set hydrocyclone tangential entry down. This tangential entry cyclone connected to the pipeline for supply of prepared water. The Central nozzle tangential input connected to the zone of accumulation and discharge of oil. 2 C.p. f-crystals, 1 Il.

The invention relates to systems of collection and preparation of oil and water in the oil fields.

Well-known [1] for the purification of waste (oily) water on the fields, consisting of a tank-clarifier, where the dispenser is connected to the pipeline, which is served by waste water compartment for accumulation and reset the AUX sucks and low productivity.

The technical task of the invention is to increase the plant productivity through more intensive separation of impurities from the incoming wastewater.

To solve the tasks set for the preparation of water on fields containing the technological capacity of the pipeline to supply treated water and piping for removal of gas, water and oil, is further provided with a hydrocyclone, and the lower part of the technological capacity divided by partitions into the zone of accumulation and discharge of water, the zone of accumulation and discharge of oil, and the Central settling zone in which the hydrocyclone has tangential inlet down, with tangential entry cyclone connected to the pipeline for sewage supply, and the Central nozzle tangential input connected to the zone of accumulation and discharge of oil.

To automate the installation is supplied by the controller of the liquid level in the settling zone, actuating mechanism installed in the pipeline supplying water for cleaning, and in the zone for the accumulation and discharge of oil sensors are mounted upper and lower levels to control the pump oil.

For joint training of water entering sing water set mixer (jet pump).

The invention is illustrated by the drawing, which shows a diagram of the installation for the preparation of water on the fields.

Installation for water treatment in the oil fields consists of horizontal technological capacity 1, the upper part of which is a zone 2 accumulation of gas, and the lower portion of the process vessel in which fluid accumulates, separated by partitions 3 and 4 zone 5 accumulation and discharge of water, the Central settling zone 6 and zone 7 of the accumulation and discharge of oil-water emulsion or oil (depending on the stability of the emulsion). Process tank 1 is equipped with a cyclone 8, which is installed in the settling zone inverted so that the tangential input 9 extends below the container 1.

When the hydrocyclone 8, there are formed three zones: the lower - separated water, medium - separated oil and the upper - separated gas. The lower area of the hydrocyclone through the holes 10 communicates with the settling zone of the tank below the liquid level therein, and the average area of the hydrocyclone through the Central pipe 11 tangential input 9 of the cyclone 8 and the bypass pipe 12 communicates with the zone 7 of the accumulation and discharge of oil.

Process tank 1 is equipped with a level control direct action, the float 13 which is the ode, the water inlet in technological capacity. In the processing vessel 1 in zone 7 for the accumulation and discharge of oil sensors 14 and 15 of the upper and lower levels.

Tangential input 9 of the hydrocyclone 8 connected to the pipe 16, the feed into the process tank 1 water to clean it. From the vessel depart the pipeline 17 to drain the oil and pipelines 18 and 19 for removal of water and gas for further recycling.

The drawing shows the setup for joint training Cenomanian and bottom (oily) water. To achieve this goal in a feed line 16 is the mixer 20.

Cenomanian water containing free gas and mechanical impurities, under the pressure of the downhole pump through the pipeline 21 is served in the jet mixer 20, in which the field of preparation of oil (not shown) in line 22 is sucked produced water.

From the output of the mixer through the regulator spool 13 of the liquid level of the mixed flow in the pipe 16 enters the hydrocyclone, which is intense separation. Water with solids through the holes 10 is discharged into a settling zone 6 of the container 1. Oil through the main pipe 11 and the pipe 12 is discharged into the zone 7 of the accumulation of oil is th under the influence of gravity there is a further division, when the oil shimmers in zone 7 of the accumulation and discharge of oil-water emulsion through an orifice 23 in the upper part of the partition 4, and the water through the slit gap 24 in the partition 3 flows into zone 5 of the accumulation and discharge of water.

Due to the fact that in produced water oil contained in a small amount, up to about 1000 mg/l, and completely separate it from the water it is very difficult, especially because the oil is in the water in the form of a thin film, in zone 7, as a rule, will accumulate water-in-oil.

Purified water by the pump 25 through the filter 26 is supplied to the system reservoir pressure maintenance in the field.

Gas due to its minor number is supplied to the dispersion or burning.

Separated water-in-oil pump 27 periodically by the command of the sensors 14 and 15 are sent to the installation of oil.

From the relative position of the float regulator 13 and the calibrated holes 23 depends on the amount of water drained from the settling zone 6 zone 7 accumulation of oil.

The Central pipe 11 hydrocyclone 8 must be positioned under the liquid surface in the distance, open the “funnel” addictive film of oil in the pipe.

For purification from scapling water from mechanical impurities and reduces the amount of oil to the value not exceeding 10 mg/l, which makes the Cenomanian and produced water suitable for reservoir pressure maintenance.

The source of information

1. The Hydrographic System Of Latushkin. Collection and preparation of oil, gas and water. M., Nedra, 1983, S. 170-172, Fig.75.

Claims

1. Installation for water treatment and water emulsions containing technological capacity of the pipeline to supply treated water and piping for removal of gas, water and oil, characterized in that it is provided with a hydrocyclone, and the lower part of the technological capacity divided by partitions into the zone of accumulation and discharge of water, the zone of accumulation and discharge of oil and the Central settling zone in which the hydrocyclone has tangential inlet down, with tangential entry cyclone connected to a pipe for supplying water to be purified, and the Central nozzle tangential input connected to the zone of accumulation and discharge of oil.

2. Installation under item 1, characterized in that it is provided by the controller of the liquid level in the settling zone, actuating mechanism installed in the pipeline supplying water for cleaning, and in the zone for the accumulation and discharge of oil sensors are mounted upper and lower levels for upravlenii water installed faucet joint submission to the preparation of the waters, coming under high and low pressures.

 

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SUBSTANCE: device includes exposure chamber, U-shaped branch pipe on it for passing of oil with picking of oil from upwards, made in form of five pipes inserted into one another with common ceiling and bottom and apertures in upper and lower portions of pipe, forming serially placed U-shaped and upturned U-shaped branch-pipe, and channel for passing of water with picking of water from downwards, having common output from device.

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1 dwg

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EFFECT: higher precision.

2 cl, 1 dwg

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EFFECT: higher efficiency.

1 ex

FIELD: oil industry.

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EFFECT: higher efficiency, broader functional capabilities.

1 ex

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EFFECT: higher efficiency.

1 ex

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EFFECT: increased simplicity due to elimination of chemical reagent usage and due to reduced number of stages.

4 ex

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15 cl, 2 dwg

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1 tbl, 2 dwg

FIELD: water production from boreholes.

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