SU1470936A1 - Deep well fluid-lifting pumping unit - Google Patents

Abstract

The invention relates to the oil industry. The goal is to increase operational efficiency by increasing the accuracy of the dosing of the reagent. For this purpose, the installation has a sleeve 6 which is concentric with respect to each other, rigidly connected with the receiving pipe 5, and a movable cup 7 with radial channels 8. The glass 7 is rigidly connected to the piston 19. The cavity of the pipe 5 under the sleeve 6 is hydraulically connected to the chamber 17 for the reagent and with the piston casing, and in the lower position of the piston is in communication with the over piston cavity. The cup 7 under its own weight falls into the sleeve 6, moving the piston 1 down. In this case, a vacuum is formed in the above-piston cavity, oil is settled in this cavity for dehydration. The gas that has accumulated in the cavity for the dewatered oil is fed to the suction of the sucker-rod pump during the suction of the liquid. 1 il.

Description

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The invention relates to the oil industry, namely, deep-well installations for oil production from a well, equipped with a metering device for supplying chemical reagents.

The purpose of the invention is to increase the efficiency of well operation by increasing the accuracy of the dosing of the reagent.

The drawing shows the proposed deep-well installation, a general view.

The installation contains a sucker rod with a cylinder 1, in which a plunger 2 with a pressure valve 3 is placed for axial movement, a suction valve 4 is placed in the lower part of the cylinder. The inlet 5 is attached to the cylinder 1 and is a continuation of it. A bushing 6 and a movable cup 7 with radial holes 8 are located in the upper part of the receiving pipe 5. The receiving pipe 5 is provided with a housing 9 at the bottom. The cylinder has a metering pump cylinder 10 and a number of channels: intake 11, pressure transfer 12 , discharge 13 and discharge 14. Intake channel 11 and pressure transfer channel 12 are combined with a system of suction 15 and discharge 16 valves, respectively, and communicated through this system with chamber 17 for the reagent. The injection channel 14 is provided with a check valve 18, the latter, depending on the density of the reagent used, is placed either at the top or at the top.

bottom of chamber 17 for reagent.

In the cylinder 10 of the metering pump there is a piston 19 of the metering pump, equipped with the necessary seals: (not shown). The piston 19 of the metering pump by means of a rod, 20 is connected to the glass 7, and this is done so that the position of the piston 19 and the glass 7 relative to each other can be changed if necessary.

In the receiving pipe between the sleeve 6 and the housing 9 there are openings 21 for receiving the incoming liquid. In: the sleeve 6 has a channel 22, which connects the cavity for the dried oil, formed by the valve sleeve 6 and the receiving pipe, with the internal cavity of the glass 7 and serves to release the gas. The upper part of the intake channel 11 is equipped with: a filter 23 placed in the cavity for dehydrated oil. In order to avoid squeezing the reagent out of chamber 17, when the well is filled up with heavy fluid, the valves 15,: 16 and 18 are equipped with additional saddles, which are opposed to the main one, before the underground repair. I

Performance regulation

The metering device is carried out before it is lowered into the well by selecting the displacement of the cylinder 10, for example, for a given diameter of the piston 19 by selecting the diameter and the stroke of the rod 20, taking into account the filling ratio according to bench test data of the metering device. After placing the downhole pumping unit in the well, it is in the initial position, namely: the cavity of cylinder 1 of the sucker-rod pump and the receiving pipe 5 is filled with oil, the cavity for dehydrated oil is filled with dehydrated oil (since a few minutes are sufficient for detouring oil in such a small volume).

the reagent chamber 17 is filled with the necessary reagent. However, depending on the density of the reagent with respect to the oil, the check valve 18 of the discharge channel 14 is located either in the upper or in the lower part of the reagent chamber 17.

The installation works as follows.

The column of rods (not shown) reciprocates, the plunger 2 is set in motion. When the latter moves upward, the discharge valve 3 closes and a vacuum is created in the cavity of the cylinder 1, causing ush to open the suction valve 4, i.e. a suction stroke occurs. Opening of valve 4 connects the cavity of cylinder 1 with the cavity of receiving pipe 5 placed between suction valve 4 and bushing sleeve and a vacuum is also created, which causes the cup 7 to move upwards. When the latter is in the upper position, oil from the annulus 21, the cavity of the suction port 5, the internal cavity of the tumbler 7, the orifices 8 and the suction valve 4 rush into the cylinder 1 of the sucker-rod pump. When moving upwards, the cup 7 with the help of the rod 20 moves the piston 19 of the metering pump, the piston cavity of which is reduced and the dried oil is in it (the steady state is considered when all the channels are filled with appropriate fluids) through the pressure valve 16 is injected into the chamber 17 for the reagent and, depending on the ratio of the densities, either remains at the top or goes down to the bottom of the tank for the reagent. The influx of oil into chamber 17 causes an increase in pressure in it, which forces the portion of reagent through the check valve 18 and the discharge channel 14 into the cavity of the suction inlet 5 in the zone of windows 21. As the dimple cavity of the metering pump communicates through the discharge channel 13 - by the receiving branch pipe, it does not exhibit damping properties,

As the plunger 2 moves downwardly in the cylinder cavity of the sucker-rod pump, pressure is created closing the suction valve 4, and the oil rushes through the pressure valve 3.

ten

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pine-compressor tubes (not shown, are a continuation of cylinder 1 upward), while the cup 7, under its own weight, is lowered into the sleeve 6, moving the metering piston down. In this case, a vacuum is formed in the overpiston cavity of the metering unit, which sucks through the pressure transmission channel 12, the suction valve

15, intake channel 11 and filter 23

dehydrated oil settled in the cavity for dehydrated oil. Then the cycle repeats. Gas that accumulates in the cavity for dewatered oil is fed to the suction of the sucker rod pump through the passage 22 in the process of sucking the liquid.

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five

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five

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five

The invention can be used in wells with practically any flow rate, with water-cut and anhydrous products, the chemical agent can have high viscosities ot 2-3 up to 700-900 mm / density - less or more density of well fluids, the chemical agent can be water soluble or oil soluble 1m, The chemical flow rate can be controlled over a wide range from 0.05 to 6-7 l / day, which allows for the continuous supply of the chemical from several months to several years depending on the stock and quality of the reagent, the flow rate, the bypass Nost products etc. The principle of action allows to reduce the maximum diameter of the dispenser to 73 mm, and its mass - up to 10 kg. The main advantage of the installation is the ability to precisely control the supply of the chemical agent, especially at low levels, which is important for increasing the turnaround time of the well and, accordingly, for increasing the efficiency of its operation.

Claims (1)

Invention Formula g deep pumping installation for lifting fluid from a well, including a sucker rod pump having a cy-. linder with plunger, receiving pipe located under the plunger, reagent dispenser installed in the receiving pipe, made in the form of a housing with a piston and a reagent chamber placed under it, an injection. 14709366 rsagvaguyuktsii and obrltgp.zh klapa ™, about t-com, and podizhnym glass with radialichlichyuchl tg-m, that ,. tightly connected channels By increasing the efficiency of the operating piston, and the cavity of the receiving patatiation of the well pump is due to the increase in the tube under the sleeve hydraulically due to the accuracy of the dosing of the reagent, it has a reagent chamber and is fitted with a concentrically mounted piston space of the housing, and relative to each other sleeve, the lower position of the piston communicates with rigidly connected to the receiving tube-piston cavity.