SU1579987A1 - Control installation of water content in borehole - Google Patents

Abstract

This invention relates to a technique for oil extraction and can be used in flooded wells producing persistent emulsions. The purpose of the invention is to increase the reliability of the device by providing automatic control of the water supply to the well when changing the water content of the product. The installation is equipped with a spring-loaded receiving cup with a stem in the lower part installed in the vessel with axial movement, having annular grooves on the outer surface and an axial channel for communicating the groove and an axial channel for communicating the cavity with the pipeline for product diversion. , the upper of which is hydraulically communicated with the tank, and the lower with the pipeline to supply water to the well, and the rod is tightly placed in the upper part of the pipeline for to produce products with the possibility of periodic hydraulic communication of the tank with the pipeline for water supply to the well 2 Il.

Description

The invention relates to the technique of oil production and can be used in flooded wells producing persistent emulsions.

The purpose of the invention is to increase the reliability of the device by providing automatic control of the water supply to the well when the water content of the product changes.

Fig. 1 shows an installation for adjusting the water content of a well; , figure 2 - the normal position of the glass with the rod; fig.Z - the same, in the position of the water supply to the well; figure 4 - the same, with a large water cut.

The installation for controlling the water content in the well contains a horizontal tank 2 installed at the wellhead 1 for hydrostatic phase separation of products with pipelines 3-5 for supplying water to well 1, for diverting and supplying products and a check valve 6 for bypassing gas from the annulus 1 , in pipeline 5 for supplying products. The installation is equipped with a spring-loaded receiving sleeve 7 installed in the container 2 with axial movement with a rod 8 in the lower part having annular grooves 9 and 10 on the outer surface and axial duct 11 for communicating the cavity of the glass 7

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ducts, the upper part of the latter is made with two annular chambers 12 and 13, the upper (chamber 12) of which is hydraulically connected with the tank 2, and the lower chamber 13 - with the pipeline 3 for supplying water to the well 1, and the rod 8 is sealed in the upper parts of the pipeline 4 for diverting products, with the possibility of periodic hydraulic communication of the tank 2 with the pipeline 3 for supplying water to the well 1.

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In the tank 1 there is a float regulator 14 for the gas-liquid section, which is installed with the ability to shut off the gas line 15. In the well 1 on the column of pump-compressor pipes 16, the pump 17 is lowered. The annular grooves 9 and 10 on the rod are separated by the collar 18j Glass Bottom spring loaded 19.

The device works as follows.

The receiving cup 7 is designed so that with equal densities of the liquid inside it and the outside, it takes its extreme and lower position in the tank due to its weight (Fig. 4). The spring 19 is in an extremely compressed state.

When extracting anhydrous oil, tank 2 is pre-filled with water. Produced from well 1, production through pipeline 5 enters the

the container 2 and then through the cup 7 and the rod 11 goes into the discharge pipe 4. The difference between the densities of water and oil outside and inside the cup 7 creates the maximum archimedean force that pushes the cup 7 to the extreme upper position, at which the water drains from the tank 2 through pipe 3 is blocked by a collar 18 located between chambers 12 and 13.

As the well production is flooded, emulsion flows through the glass 7. The more flooded the products, the greater the density of the emulsion in glass 7 and the lower the glass 7 is lowered together with the stem. When a certain water cut is reached (for example, 50%), the collet 18 comes out of contact with the pipelines and opens the discharge of water from the tank 2. Water flows through the annular chambers 12 and 13 and the pipeline 3 into the annulus of the well 1. The spring stiffness 19 and the weight of the cylinder 7 is selected so that the opening of the water discharge occurs when a certain water content of the well production (or emulsion density) is reached. The volume of water discharged in this case is determined by the size of the annular gap formed by the rod 11 by the pipe 3 and the annular groove 9.

After the water-cut reaches the value at which phase inversion occurs in pipes without water flow (for example 75%), the density of the water-oil mixture in glass 7 is sufficient for rod 11 to block the cross-section of chamber 12 and drain water. In the future, well operation occurs without self-priming.

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The gas-liquid level regulator 14 prevents oil from entering the gas line 15 by shutting off the pipeline 15 with the damper when the liquid level in the tank 2 rises.

Claims (1)

Invention Formula A control unit for maintaining water content in a well, comprising a horizontal tank installed at the wellhead for hydrostatic phase separation of products from pipelines for supplying water to the well, for withdrawing and supplying products, and a check valve for bypassing gas from the annulus of the well to pipeline for supplying products, This differs from the fact that, in order to increase the reliability of its operation by providing automatic control of the water supply in the well when the watering and it is provided with a spring-loaded receiving cup with a stem in the bottom part capable of axial movement with a stem in the lower part, having annular grooves on the outer surface and an axial channel for communicating the cavity with the pipeline for diverting products, the upper part of the latter is made with two annular chambers hydraulically communicated with the tank, and the bottom with the pipeline to supply water to the well, and the rod is tightly placed in the upper part of the pipeline for removal of products with the possibility of cally capacitance fluid communication with the conduit for feeding water into the well. / L  f Oil X /  one ZmoAir Fig.Z