RU1774070C - Oil-well ejector pump - Google Patents

Abstract

SUMMARY OF THE INVENTION: An active nozzle with an inlet guide element is connected to an active fluid supply line (TP). The diffuser is connected to the discharge duct of the mixture of media located concentrically to the supply lead. In the guide element, a toroidal recess is made on the inlet side of the nozzle. The nozzle is made with the input profiled section. The receiving chamber is provided with two diametrically arranged radial windows for supplying a passive medium and two vertical channels located between them for supplying the active medium to the nozzle. The nozzle is mounted in the receiving chamber and is provided with a flange with two intermediate windows located between the receiving chamber and the guide element. Intermediate windows are aligned with vertical channels. The channels and windows are located symmetrically with respect to the axis of the ejector and are made with the same radii of curvature in the plane of the cross section. A toroidal recess is made in the inlet section with the radius of curvature of the intermediate windows made with an inclination to the horizontal plane at an angle equal to 45 °. 2 ill. sl c

Description

The invention relates to inkjet technology, mainly to pumping liquid and gas-liquid medium from wells using jet pumps

A well-known jet pump including a pipeline for supplying an active liquid medium and a mixture of fluids, an inlet and an outlet pipe, a support assembly and an ejector connected to the lower parts of both pipelines and consisting of a nozzle, a mixing chamber and a diffuser (Scientific Research Institute of Sanitary Engineering. Academy of Construction and architecture of the USSR Water-lifting installations for local

water supply. The reference book of the State Publishing House on construction, architecture and building materials. M, 1961, pp. 74-75).

The disadvantages of the known jet pump are its large transverse dimension, which allows the pump to be placed only in an expensive well with a filter having a relatively large inner diameter (DN225 or more), and the lack of devices for intensifying ejection. which reduces the pump’s ability to pump gas-liquid media, in particular in a water-air mixture, with which often

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to deal with the drainage of waterlogged poor-permeable soils

A well-known jet pump, the closest in purpose and technical essence to the claimed, including an active nozzle connected to the pipeline for supplying an active liquid medium, a mixing chamber and a diffuser connected to the pipe for withdrawing a mixture of media, as well as a guiding element on the approach to the nozzle a passive medium with a toroidal recess made therein (US patent No. 4135861, CL 417-183, published. 1979).

The disadvantages of the known jet pump are its reduced productivity, due to the lack of swirling of the active liquid medium at the inlet to the nozzle, and large hydraulic losses on the way of the passive medium to the receiving chamber.

The purpose of the invention is to increase productivity by intensifying the ejection of a passive medium and reducing hydraulic losses.

The goal is achieved in that in a well jet pump containing an active nozzle with an inlet guide element connected to an active liquid medium supply pipe, a mixing chamber and a diffuser connected to a medium mixture discharge pipe arranged concentrically to the active medium supply pipe, and in the direction a toroidal recess is made on the input side of the nozzle, and the nozzle is made with an inlet profiled section in order to increase productivity by reducing hydraulic sweat The ejector is equipped with a receiving chamber with two diametrically located radial windows for supplying a passive medium and two vertical channels located between them for supplying the active medium to the nozzle, and the latter is installed in the receiving chamber and provided with a flange with two intermediate windows located between the receiving chamber and guide element, while the intermediate windows are aligned with the vertical channels, the intermediate windows and channels are located symmetrically with respect to the axis of the ejector and are made with the same radius the curvatures themselves are in the plane of the cross section, a toroidal recess is made in the inlet section with the radius of curvature of the intermediate windows, and the latter are made with an inclination to the horizontal plane at an angle equal to 45 °,

The main differences of this decision should be considered the use of a guiding element with an internal toroidal recess at the entrance to the nozzle and equipping the nozzle with a flange with two intermediate windows having a slope of 45 ° with respect to the horizontal plane.

Unlike the claimed design 0, the prototype is equipped with a mountainous guide element on the approach of the passive (ejected) medium to the receiving chamber of the ejector, and on the approach of the active liquid medium to the nozzle there are no 5 structural elements that contribute to the twisting of this medium and increase this productivity jet pump

In the inventive design, a guide element with a toroidal recess, together with intermediate tilted windows, ensures the swirling of the active medium as it approaches the nozzle with minimal hydraulic loss. Significantly less here than in the prototype, hydraulic losses on the path of the passive medium to the receiving chamber. All this leads to an increase in the productivity of the jet pump.

A technical solution is known, according to which, on the approach to the radial 0-axis hydraulic turbine, a guide apparatus is installed, made in the form of a set of inclined blades (see T. M, Bashta and other Hydraulics, hydraulic machines and hydraulic 5 drives. M .: Engineering, 1970, p. 255-258). The purpose of such a guiding apparatus is to inform the turbine of the required peripheral velocity component.

According to the claimed construction, the function O of the element twisting the active medium is carried out by intermediate inclined windows in the nozzle flange. Their purpose is to ensure the supply of the active medium to the nozzle with a reduced loss of pressure on impact when the 5 active medium enters the torus-shaped recess and to tighten the active medium on the nozzle approach with tilted windows, which provides the ejector with increased air and water-air mixture productivity. 0 Thus, the claimed decision differs significantly from the contrasted one in terms of the function performed and meets the criterion of significant differences. In FIG. 1 shows a general view of a 5-liter ejector well borehole installed in a water-reducing well; in FIG. 2 shows a longitudinal and transverse section of an ejector borehole water lift in a well.

The inventive ejector borehole elevator includes a pipe 1 for supplying an active liquid medium, a pipe 2 for supplying a mixture of media located inside it, a sealing assembly 3, a sealing space between pipelines 1 and 2 in their upper part, an inlet pipe 4 connected to a pipe 1, an outlet pipe 5, connected to the pipeline 2, the couplings 6 and 7 of both pipelines, the support node 8, which is made with the possibility of tight sealing on the head 9 of the well 10, equipped with a filter 11. and also an ejector consisting of a diffuser 12, the output part connected to the bottom of the pipe 2 of the removal of the mixture of media, the mixing chamber 13, connected to the inlet part of the diffuser 12, the housing 14, in the Central upper part connected to the mixing chamber 13, and not the periphery through the adapter 15 - with the lower part of the pipeline 1 for supplying an active liquid medium, the nozzle 16 with a flange 17 inserted into the housing 14, and a guide element 18 screwed into the housing 14 and pressing through the flange 17 of the nozzle 16 to the housing 14. The seal of the ejector nozzle relative to the housing is carried out by means of a rubber ring 19 inserted into the outer groove of the nozzle 16.

Two radial windows 20 are made in the housing 14 for receiving a passive medium diametrically relative to each other and two vertical channels 21 located between them for supplying an active medium to the nozzle 16. Windows 20 are in communication with a receiving chamber 22 located between the nozzle 16 and the mixing chamber 13. The confused shape of the inlet portions of the windows 20 reduces the hydraulic resistance of the passive flow coming from the well 10 into the receiving chamber 22.

 Two intermediate windows 23 are made in the flange 17 of the nozzle 16, having the same radii of curvature and aligned along the upper plane with vertical channels 21 in the housing 14. At the same time, the side walls 24 of both windows 23 are tilted to one side (clockwise or counterclockwise) at an angle 45 ° in relation to the horizontal plane.

A toroidal recess 25 is made in the interior of the guide member 18 with a radius of curvature of the outer wall equal to the radius of curvature of the outer walls of the windows 23.

The choice of the angle of inclination of the walls 24 with respect to the horizontal plane 45 °

due to the fact. that it is precisely this angle that avoids the increased pressure losses associated with the collision of the active medium, with the inclined walls of the windows and with a toroidal recess having a small radius of curvature.

Indeed, the smaller this angle, the closer its value to zero, the greater the loss of pressure on impact of the active stream against 10 of one of the inclined walls 24 in each of the windows 23 and the weaker the impact of this stream with the toroidal recess 25 of the guide element 18 In this case, the pressure loss due to the impact of the flow on inclined walls 24 can 5 be so significant that they will significantly exceed the gain due to the mitigation of the interaction of the flow with a toroidal recess.

On the other hand, the greater the angle of inclination of the walls 24, ie, the closer it is to 90 °, the stronger the interaction of the flow with the toroidal recess and the smaller the hydraulic losses due to its collision with the walls of the windows.

5 This time, the pressure loss due to the interaction of the flow with the toroidal recess can be much larger than the gain from lowering the collision loss with the inclined walls 24 of the windows 23. It follows from this that, from the point of view of ensuring minimum total hydraulic losses, an angle of 45 ° is optimal .

In order to facilitate assembly and improve its quality, the position of the nozzle 16 relative to the housing 14 is fixed, for example. with a groove 26 in the nozzle flange and a guide pin 27 in the housing.

To reduce the likelihood of relatively large suspensions entering the ejector, as a result of which sanding of the filter 11 can result in accelerated wear of the mixing chamber 13, a cover 28 with a central entrance 29 is attached to the adapter 15.

The inventive device operates as follows.

The ejector borehole water lifts, which are part of the borehole ejector drawdown installation, are immersed in the boreholes by placing their support nodes 8 on the heads 9 of the boreholes 10. The inlet pipe 4 and the outlet pipe 5 of each water lift are connected respectively to the pressure distribution and drainage collectors of installation 5 (not shown in the figures).

Active liquid (working water) with the required pressure and flow rate is supplied through the inlet pipe 4 to the pipe 1. Along the 5th ring between the water pipes 1 and 2. runs down

to the vertical channels 21, and then through these channels and windows 23 with inclined side walls 24, it is poured into a toroidal recess 25.

Descent from the inclined walls 24 of the windows 23, the flow of the active medium acquires a tangential velocity component, which leads to the softening of the impact of the flow on the surface of the toroidal recess 25 and at the same time imparts to the active medium, i.e. water, rotational movement within this recess. Thus, while rotating, the water rises to the active nozzle 16, from which it enters the receiving chamber 22 at a high speed in the form of an expanded torch, which intensifies the ejection of the passive medium, primarily air or water-air mixture. When passing through the receiving chamber, the flow of the active medium carries away the passive medium coming from the well through the inlet 29 and the receiving windows 20, i.e. water or a mixture with air, which is discharged through a mixing chamber 13, a diffuser 12, a pipeline 2 for discharging a mixture of media and an outlet pipe 5 to a drainage collector.

Depending on the type of soil, a water elevator can operate in two main modes: pumping water from soils with high permeability; pumping water and air from soils with low permeability - When pumping water from highly permeable soils, the support node 8 on the head 9 of the well is not sealed. In this case, the dynamic groundwater level 30 is located above the inlet 29 and the ejector only pumps out water.

When pumping water from poorly permeable soils, the support unit 8 is sealed on the head 9 of the well in order to create a vacuum in the well and its filter zone that intensifies the water loss of the soil. In this case, the dynamic groundwater level 31 is located directly at the inlet 29 and the ejector pumps out both the water and the air entering the well from the drained soil.

It follows from the above description that the totality of the hallmarks works to achieve the goal.

The use of the inventive downhole jet pump provides, in comparison with the prototype, an increase in the productivity of the water-air mixture by 1.5-1.7 times, compared with the commercially available water lift ESV-20, the claimed design provides the same

performance, but with 1.7-2.0 smaller lateral size.

Design work carried out by VNII VODGEO and the Tidrospetsproekt Institute showed that the maximum diameter of a well jet pump with a concentric arrangement of pipelines 1 and 2 reaches 90 mm. It follows that the minimum for use

0 of such jet pumps can be considered wells with an internal diameter of 132 mm.

The economic effect of introducing one well unit, which includes 30 jet pumps of the proposed design, is approximately 41 thousand rubles compared to the ESU-20 unit.

The estimated number of installations of this type in the country will be 25 units, which means that the total annual economic effect will approximately exceed 1 million rubles,

Claims (1)

SUMMARY OF THE INVENTION A downhole jet pump comprising an active nozzle with an inlet guide element connected to an active fluid supply pipe, a mixing chamber and a diffuser connected to a concentric discharge pipe located concentrically 0 a pipeline for supplying an active medium, and a toroidal recess is made in the guide element from the entrance to the nozzle, and the nozzle is made with an inlet profiled section, distinguishing 5 in that, in order to increase productivity by intensifying the ejection of the passive medium and reducing hydraulic losses, the ejector equipped with a receiving chamber with two diametrically 0 located radial windows for supplying a passive medium and two vertical channels located between them for supplying the active medium to the nozzle, and the latter is installed in the receiving chamber 5 and provided with a flange with two intermediate windows located between the receiving chamber and the guiding element, while the intermediate windows are aligned with vertical channels, channels 0 and the intermediate windows are located symmetrically relative to the axis of the ejector and are made with the same radii of curvature in the plane of the cross section, the toroidal recess is made in the inlet section with the radius of curvature of the intermediate windows, and the latter are made with an inclination to the horizontal plane at an angle of 45 °, s Pue.f Abandonment / s .jet asos 28 Јf