RU2311566C1 - Device for aerating liquid - Google Patents

Abstract

FIELD: liquid aeration, possible use for drilling wells and extracting oil.

SUBSTANCE: device contains liquid feeding system, acceleration chamber, nozzle block, gas feeding system, mixing chamber, where nozzle block has multi-nozzle part, which contains serially mounted thin disks with possible feeding of gas flow being ejected between them. Each disk has central conic aperture, narrowing along the movement of main liquid flow. Thin disks may be mounted with a gap between each other and/or may have radial groove.

EFFECT: increased efficiency, simplified assembly and comparatively low cost.

5 cl, 2 dwg

Description

The invention relates to ejector installations and can be used in well drilling and oil production.

Known ejector traction enhancer of a turbojet engine containing a pipe for supplying a passive medium, a mixing chamber, a diffuser and active nozzles mounted on the walls of the pipe, located at an angle to the axis of the mixing chamber and the meridial plane (patent RU 1093062, class F02K 1/36, 1994).

Known ejector traction enhancer operates at close pressures of the main and ejected flows. If the pressure of the main stream is significantly higher than the ejected one, the ejection coefficient drops sharply.

A known ejector containing an active nozzle, a conical receiving chamber, a mixing chamber and a diffuser, while the length of the mixing chamber and the length of the diffuser are connected by a certain ratio (patent RU 2151919, class F04F 5/04, 2000).

With such a constructive implementation of the ejector to maintain a high efficiency, it is necessary to supply an ejected flow with high pressure.

Closest to the proposed installation in technical essence is a liquid-gas ejection device containing a fluid supply system, a booster chamber, a nozzle unit, a gas supply system, a mixing chamber (patent RU 2232924, class F04F 5/02, 2004).

The known device has a low efficiency with a large pressure difference between the ejected and the main flow.

In addition, all of the above known installations operate without experiencing much back pressure to the supplied fluid flow.

During well drilling and oil production, the supplied fluid stream experiences strong back pressure. Under these conditions, in the above installations, the fluid flow changes the path and is wrapped in the zone of the supplied gas, thereby locking the ejector.

The technical problem to which the invention is directed is to create a low-cost, non-explosive installation for aeration of a liquid having a low metal content, high reliability during long-term operation and providing a highly effective water-gas effect on oil reservoirs.

The technical result obtained by the implementation of the invention consists in obtaining a high efficiency of the installation with a significant difference in the pressures of the main stream of the liquid injected under high pressure and the ejected gas supplied under low pressure.

To achieve the specified technical result in a device for aeration of a liquid containing a fluid supply system, a booster chamber, a nozzle block, a gas supply system, a mixing chamber according to the invention, the nozzle block has a multi-nozzle part in which thin disks are arranged in series with the possibility of supplying an ejected flow between them (gas). Each disk has a central conical hole, tapering in the direction of movement of the main stream (liquid).

Thin disks can be installed with a small gap between each other and / or have radial grooves.

Due to the multi-nozzle design of the ejector and due to the small thickness of the disks, the liquid aeration unit operates at a large pressure difference between the main and ejected flows.

Due to the significant circumference of the holes in the disks and a large number of disks, the amount of air required for aeration is supplied from the gas supply system.

The presented set of essential features of the installation provides high efficiency during operation with high backpressure to the fluid flow in the circulation system of the wells.

Figure 1 shows a view of the device in longitudinal section; figure 2 - the working part of the nozzle block.

Installation for aeration of the liquid contains a fluid supply system 1, a booster chamber 2, a nozzle block 3, a gas supply system 4, a mixing chamber 5.

In the multi-nozzle part of the nozzle block, thin disks 6 with a central conical hole are sequentially installed with a gap between them, tapering along the course of the fluid. Half of the angle of the cone of the hole (cutting angle) α = 10-30 °. The optimum thickness of the discs is b = 1.5-4.0 mm. Thin discs may have radial grooves.

Installation for aeration of the liquid works as follows.

The working fluid pumped by the pump from the fluid supply system 1 enters the booster chamber 2.

An ejected stream is supplied to the multi-nozzle part of the nozzle block 3 from the low-pressure gas supply system, which enters the fluid flow through the gaps between the disks 6 and / or along the radial grooves of the disks 6, passing through successively mounted disks.

Due to the small thickness of the disks 6, the liquid does not have time to enter the slots between the disks and creates at the junction of the disks at the beginning of the large base of the conical hole a vacuum zone of the geometric shadow A shown in Fig. 2. The small thickness of the disk does not allow the outer layers of the fluid flow to abruptly change their path. Expanding, the flow hits the wall of the hole of the next disk, tapers again and goes into the hole of the next disk. Passing the vacuum zone A, the fluid flow sucks in the ejected gas, which is mixed with the liquid in the mixing chamber 5 and then fed into the well.

The installation passed an industrial test, and its implementation will provide a large economic effect due to high efficiency, ease of assembly and relatively low cost.

Claims (5)

1. Installation for aeration of a liquid containing a fluid supply system, an accelerating chamber, a nozzle block, a gas supply system, a mixing chamber, characterized in that the nozzle block has a multi-nozzle part in which thin disks are mounted in series, with the possibility of supplying an ejected gas stream between them , while in each disk a central conical hole is made, tapering in the direction of the fluid flow. 2. Installation according to claim 1, characterized in that the thin disks in the nozzle block are installed with a small gap between them. 3. Installation according to claim 1, characterized in that the radial grooves are made in thin disks for the passage of the ejected gas stream. 4. Installation according to claim 1, characterized in that the thickness of the disks is 1.5-4.0 mm 5. Installation according to claim 1, characterized in that half the angle of the cone of the Central conical hole is 10-30 °.

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