Gas-lifting plant

FIELD: oil industry.

SUBSTANCE: device has oil-lifting column, which is combined with space inside casing string and is provided with means for supplying compressed gas into hollow of oil-lifting column. Cover is concentrically positioned around oil-lifting pipe and is mounted with space relatively to inner surface of casing string. Oil column is made in form of a row of vertically and serially mounted gas-liquid ejectors with active ultrasound nozzle each and horizontal pipes for supplying compressed air to them. Cover is placed in lower portion of plant and is connected by at least three spreaders to upper portion of lower ejector, and means for supplying compressed gas is serially connected to separator, filter, vacuum pump and compressor.

EFFECT: higher efficiency and productiveness.

3 dwg

 

The invention relates to the field of the oil industry and can be used for oil, water and other liquids, as well as for pumping of bulk solids.

Known injection (injection) device for pumping liquids, consisting of a supersonic nozzle, mixing chamber and the receiving part (see Sokolov BJ, singer N.M. Jet devices. Moscow, Energoatomizdat, 1989, s).

The disadvantage of these devices is that they are able to pump out the liquid only from the depth of the hydrostatic column of pumped liquid.

Known gas-lift installation comprising neftepodobnogo column placed with a gap inside of the casing and provided with means for supplying a compressed gas into the cavity neftepodobnogo columns, casing, concentrically located around the column and mounted with a clearance relative to the inner surface of the casing (see mon. Of the Russian Federation No. 21628, IPC 7 F 04 F 5/54, epubl, bull.№3).

The disadvantage of this setup is the low productivity and the efficiency of the plant due to insufficient maintenance of the pumping medium.

The closest in technical essence is a gas lift installation comprising neftepodobnogo column, made in the form of a number of vertically and sequentially installed gas-liquid ejectors with active supersonic nozzle of each the first and the horizontal tubes for supplying compressed air thereto, placed with a gap inside of the casing and provided with a means for supplying a compressed gas into the cavity neftepodobnogo columns, which are connected to the separator and the compressor and the casing, concentrically located around the column and mounted with a clearance relative to the inner surface of the casing (see U.S. patent No. 4083660, CL F 04 F 1/20, 11.04.1978).

The disadvantage of this setup is also low productivity and the efficiency of the plant due to insufficient maintenance of the pumping medium.

The proposed invention solves the problem of improving the performance and efficiency of the unit for adequate provision of pumping medium (oil, water and the like).

To achieve the technical result in gas-lift installation, containing neftepodobnogo column, made in the form of a number of vertically and sequentially installed gas-liquid ejectors with active supersonic nozzle each and horizontal tubes for supplying compressed air thereto, is placed with a gap inside of the casing and provided with a means for supplying a compressed gas into the cavity neftepodobnogo columns, which are connected to the separator and the compressor and the casing, concentrically located around the column and mounted with a clearance relative to the inner surface of the casing, and according to the finding of the casing is located in the lower part of the unit and is connected, at least three spacers with the upper part of the lower ejector, and means for supplying compressed gas connected in series with the filter and vacuum pump.

The location of the casing in the lower part of the installation and connection of three bars with the upper part of the lower ejector and a serial connection means for supplying compressed gas to the filter and vacuum pump allow you to provide additional pumping oil, water, etc. and to increase the performance efficiency of the well and the efficiency of the installation.

The proposed gas-lift installation is illustrated in the drawings.

Figure 1 is a longitudinal section of a gas lift installation.

Figure 2 - cross section A-a in figure 1.

Figure 3 - cross section B-B in figure 1.

Gas-lift installation (figure 1) contains neftepodobnogo column placed with a gap inside of the casing 1 and is made in the form of a number of vertically and sequentially installed gas-liquid ejectors, each of which contains an active supersonic nozzle 4, the receiving part 2, the horizontal tube 3 for supplying compressed air to the active nozzle 4, the mixing chamber 5, the output of the diffuser 6 and the sealing device 7 at the top and bottom of the column. Nepripojena column is connected to the space between the casing pipe 1 and the column by means of series-connected separator 8, filter 9, the vacuum pump 10, compre the litter 11. In the lower part of the unit circle around her has a casing 12 which is connected at least three spacers 13 with the upper part of the lower ejector.

The device operates as follows. Compressed air from the compressor 11 is supplied into the space between the casing pipe 1 and neftepodobnogo column and then goes through the horizontal tube 3 in the active supersonic nozzle 4, which accelerates to supersonic speed and is fed into the mixing chamber 5 of the ejector, where at the moment of starting captures and compresses the existing casing pipe 1 gas, thereby creating a vacuum in the lower part of the tube 1. The hydrostatic pressure of the reservoir fluid raises the liquid in the pre-otakuminopera the receiving part 2, and then in the mixing chamber 5 there is a mixture of working air from the pumped liquid, and the resulting gas-liquid mixture is fed to the next ejector, where the process repeats. Finally the resulting mixture is fed into the separator 8, on the surface, where the gas is separated from liquid, gas through the filter 9, the vacuum pump 10 and the compressor 11 is supplied again in the annulus, and the oil undergoes further separation.

The implementation of gas-lift installations in the form of a number of vertically and sequentially installed gas-liquid ejectors, which actually is the tsya speed pumping, and she nepripojena installation - multi-stage pump allows you to more effectively ensure the pumping of oil, water and the like, using gas-dynamic calculation, and allow you to redistribute the degree of compression stages when changing parameters (flow rate, pore pressure, temperature, etc.), i.e. to increase the productivity and efficiency of the installation. In addition, this embodiment eliminates the casing that is installed along the entire column, and leave it only in its lower part is not only simplifies the design, but also increases its efficiency. And the use of a vacuum pump of the gas-liquid ejector, eating a working gas from the compressor, allows to achieve full sellcount working gas and, consequently, to increase the efficiency of the installation and, very importantly, to improve the environment of oil production, excluding entering the atmosphere associated gas and decomposition products.

Currently conducting a pilot test is planned and the implementation of the proposed installation at OJSC "Tatneft".

Gas-lift installation comprising neftepodobnogo column, made in the form of a number of vertically and sequentially installed gas-liquid ejectors with active supersonic nozzle each and horizontal tubes for supplying compressed air thereto, is placed with a gap inside obsed the second pipe and provided with a means for supplying a compressed gas into the cavity neftepodobnogo columns, which is connected in series with separator and the compressor and the casing, concentrically located around the column and mounted with a clearance relative to the inner surface of the casing, wherein the casing is located in the lower part of the unit and is connected, at least three spacers with the upper part of the lower ejector, and means for supplying compressed gas connected in series with the filter and vacuum pump.



 

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