RU208489U1 - MEDIUM FLOW REGULATOR WITH A DIFFERENT DUCT - Google Patents

Abstract

The utility model relates to the oil industry and can be used in the operation of oil, gas, water wells when pumping liquid media with mechanical impurities. The media flow control device autonomously controls the influx of fluids into the well, increasing the influx of well fluid into the wellbore by choking off unwanted fluids (water and gas). The media flow control device operates autonomously, changing the operation parameters depending on the properties of the well fluid inflow. EFFECT: increased efficiency of well fluid separation with lower viscosity by reducing the proportion of water and gas in the produced fluid, which is achieved by creating additional flow resistance, as well as additional pressure on the disk from below, thereby tightly closing the main inlet of the device through which the fluid enters the valve, which, in turn, leads to an increase in oil production and, accordingly, to an increase in well flow rate. 2 ill.

Description

Technology area

The utility model relates to the oil industry, in particular to the field of hydrocarbon production, and can be used in the operation of oil wells autonomously to control the inflow of fluids and separate the well fluid with a lower viscosity.

State of the art

Analysis of the prior art in this area showed the following. During the operation of wells, the inflow of unwanted fluids (gas and water) is more active due to greater mobility and increasing phase permeability. To control the flow of fluids into the well, devices are installed to regulate the flow of media that increase the proportion of oil flow in the well production. These devices are installed on the base pipe of the downhole wire-slotted filter in order to limit the inflow (water or gas) in a specific area.

From the prior art, an inflow control device is known to be installed in a well on the lateral surface of a pipe between the tubular and annular space. The device includes a body with holes in the bottom located along the edge of the inner cavity of the body, a cover with one hole in the center, and a movable disk acting as a valve installed between the axial projections of the disk and the cover located on the bottom. A threaded hole is made in the center of the bottom of the body, in which a screw is installed, made from the side of the lower end with a slot or with a blind multi-faceted hole for a key, and from the side of the upper end, a cylindrical cavity is made, in which a spring is installed, abutting against a cylindrical recess made on the disk , the diameter of which is not less than the outer diameter of the spring. The disadvantage of this device is that this technical solution does not allow for high efficiency of separation of the well fluid with a lower viscosity.

The closest to the claimed utility model, in terms of the technical result and the problem being solved, is a device that is installed on the base pipe of a wire-slotted borehole filter in order to limit the inflow in a specific area. The device is based on the Bernoulli effect and contains a movable element (disk), which, with a decrease in the viscosity of the passing fluid, is attracted due to the redistribution of pressure and friction forces (application for invention US 2015/0040990 A1, class E21B 43/08, 12.02.2015). The disadvantage of this device is abrasive wear and destruction of the filter mesh due to its blockage and slow cleaning from mechanical impurities, as well as a low separation coefficient of mechanical impurities. The disadvantage of this device is also the impossibility of ensuring a high separation efficiency of the well fluid with a lower viscosity. This technical solution was chosen as a prototype.

Disclosure of the essence of the utility model

The technical result, the solution of which is aimed at the technical solution claimed as a useful model, is to increase the efficiency of separation of the well fluid with a lower viscosity by reducing the proportion of water and gas in the produced fluid, which is achieved by creating additional resistance to flow, as well as additional pressure on the disk from below, thereby tightly closing the main inlet of the device, through which the fluid enters the valve, which in turn leads to an increase in oil production and, accordingly, to an increase in well production.

The use of the device makes it possible to achieve limitation of the inflow of the aqueous phase even during filtration of the well fluid, where the contrast of the viscosities of the fluids is not high. This is a fundamental improvement over the previous known device.

The device for regulating the flow of media is installed in the well on the lateral surface of the pipe between the pipe and annular space. The device for regulating the flow of media includes a housing, a cover, a movable disk located in the inner cavity of the housing and an additional channel. The device for regulating the flow of media contains a funnel into which the fluid enters and located between the cover and the disc. The cover is made in the form of a nut with holes forming the inlet of the main passage for fluid, and the outlet of the main passage is located in the bottom of the housing. Also, the device for regulating the flow of media contains a fixing element located in the inner cavity of the housing and limiting the movement of the disk in the inner cavity of the housing. A membrane is located between the disc and the bottom of the housing, which forms a cavity into which fluid flows from the additional channel to create additional pressure on the disc from below. The additional channel is made in the form of a laminar fluid flow element, in the form of a twisted tube containing round loops. The section of the coiled tube corresponds to the outlet and inlet sections of the body channels through which the fluid enters the coiled tube. In the bottom of the body, in the cavity into which the fluid flows from the additional channel, there is a jet made in the form of a turbulent flow device in the form of a hole with a thin plate.

The device proposed for consideration is a modernized and improved modification of a previously patented device based on the Bernoulli effect. In addition to a movable element - a disk, which is attracted by a redistribution of pressure and friction forces with a decrease in the viscosity of a passing fluid, the device contains a laminar fluid flow element in the form of a twisted thin-section tube and a jet made in the form of a turbulent flow device in the form of a hole with a thin plate ... At the same time, the hole serves to create additional pressure on the lower surface of the levitating disk when the well fluid passes through the valve, and the lower the viscosity, the more pressure will be exerted on the lower surface of the disk for additional pressure on the disk in order to completely close it.

Due to the Bernoulli effect, the flow area between the disk and the cover of the device becomes less than the section of the twisted tube, the fluid flow goes through the tube, which has an outlet under the disk, where the laminar flow, giving way to turbulent flow, creates additional resistance to the flow, as well as additional pressure on the disk from below, so most tightly closing the main inlet (main fluid passage) of the device through which the fluid enters the cavity of the device.

Description of drawings

FIG. 1 shows a general diagram of the inventive device for regulating the flow of media.

1 - case;

2 - a cover made in the form of a nut;

3 - funnel;

4 - disk;

5 - fixing element;

6 - membrane;

7 - jet made in the form of a hole with a thin plate;

8 - additional channel made in the form of a twisted tube (element of laminar fluid flow).

FIG. 2 is a top view of a device for regulating the flow of media.

Implementation of the utility model.

A device for controlling the flow of media autonomously controls the flow of fluids into the well by increasing the flow of well fluid into the wellbore by choking unwanted fluids (water and gas). The device for regulating the flow of media operates autonomously, changing the operating parameters depending on the properties of the well fluid inflow. The device for regulating the flow of media is installed in the well on the lateral surface of the pipe between the pipe and annular space.

A device for regulating the flow of media is installed on the base pipe of the downhole wire-slotted filter in order to limit the inflow (water or gas) in a specific area.

The device for regulating the flow of media, proposed for consideration, is a modernized and improved modification of the device based on the Bernoulli effect. In addition to the movable element made in the form of a disk 4, which is attracted by the redistribution of pressure and friction forces when the viscosity of the passing fluid decreases, the device contains a laminar fluid flow element in the form of a twisted thin tube 8 and a nozzle 7 made in the form of a turbulent flow device in the form of a hole with a thin plate. At the same time, the hole serves to create additional pressure on the lower surface of the levitating disk when the well fluid passes through the valve, and the lower the viscosity, the more pressure will be exerted on the lower surface of the disk for additional pressure on the disk in order to completely close it.

An example of an implementation of a device for regulating the flow of media is a device in which, due to the Bernoulli effect, the flow area between the disk 4 and the cover 2 of the device becomes less than the section of the tube 8, the fluid flow goes through the tube, which has an outlet under the disk, where the laminar flow, giving way to turbulent creates additional resistance to flow, as well as additional pressure on the disk from below, thereby tightly closing the main inlet of the device through which the fluid enters the body 1 of the device. The movable disk 4 is located in the inner cavity of the housing 1 and an additional channel 8. The device for regulating the flow of media contains a funnel 3, into which the fluid enters and located between the cover 2 and the disk 4. The cover 2 is made in the form of a nut with holes forming the entrance of the main passage for the fluid , and the exit of the main passage is located in the bottom of the hull. Also, the device for controlling the flow of media contains a fixing element 5 located in the inner cavity of the housing 1 and restricting the movement of the disc 4 in the inner cavity of the housing 1. Between the disc 4 and the bottom of the housing 1 there is a membrane 6, which forms a cavity into which fluid flows from the additional channel, to create additional pressure on the disc from below. Additional channel 8 is made in the form of a laminar fluid flow element, in the form of a twisted tube containing round loops. The cross-section of the coiled tube corresponds to the outlet and inlet cross-sections of the body channels through which the fluid enters the coiled tube. In the bottom of the housing 1, in the cavity into which the fluid is supplied from the additional channel 8, there is a nozzle 7 made in the form of a turbulent flow device in the form of a hole with a thin plate and intended for the dosed supply of liquid or gas. In addition, the jet doses the fluid supply from the cavity into which the fluid flows from the additional channel into the pipe cavity. At the same time, the fluid flow goes through the twisted tube 8 (additional channel), which has an outlet under the disk 4, where the laminar flow, replacing the turbulent one, creates additional resistance to the flow, as well as additional pressure on the disk 4 from below, thereby tightly closing the main inlet orifice (main fluid passage) of the device through which fluid enters the cavity of the device.

The outer twisted tube for laminar flow makes it possible to create characteristics of the device operation that are completely different from the operation of the Bernoulli valve. in a flow in which a liquid or gas moves in layers without mixing and pulsations (that is, without random rapid changes in velocity and pressure). In this case, laminar flow is possible only up to a certain critical value of the Rockwell number, after which it becomes turbulent, and the critical value of the Rockwell number depends on the specific type of flow (flow in a circular pipe, flow around a ball, etc.).

The performance characteristics of the proposed technical solution (Device for regulating the flow of media) directly depends on the diameter of the channel of the outer tube, its length and internal roughness, since when the fluid moves along this channel, with its sufficient length, the turbulent fluid flow will be aligned into a laminar flow regime, which in turn will affect the operation of the internal diaphragm of the equipment. An additional channel, with a sufficient length, in the proposed utility model is designed to provide a sufficient laminar flow of fluid to the diaphragm. In addition, an additional outer channel provides additional pressure under the disc, helps the disc and diaphragm to close off in case of filtration of liquids with lower viscosity and gases. An equal-diameter outer channel of more than one meter avoids pressure drops and fluid velocity under the disc. The long channel of the coiled tube (element of the laminar fluid flow) allows you to create a stable laminar fluid flow, which leads to stable operation of the device. The speed of fluid passage through the main passage is several times higher than the speed of fluid passage through the additional passage when the main passage is open for the fluid.

The main fluid passage has been shown and described as having a particular configuration, it will be understood by those skilled in the art that the main fluid passage of the present invention can have a variety of designs with any number of passages, branches and / or outlets, either more or less. provided that the main fluid passage provides a fluid path between the inlet and outlet sides of the fluid control device.

The body 1 of the device for regulating the flow of media, the cover 2, the fixing element 5 and the nozzle 7 are made of corrosion-resistant and heat-resistant steel 08X18H10 (GOST 5632). Disc 4 is made of a sintered alloy of tungsten carbide (GOST 3882), and the membrane is made from rubber compounds 7В-14 and 7В-14-1, intended for the production of molded and profiled rubber parts operating in gasoline, industrial oils, ethanol in the temperature range from -60 to + 100 ° С (TU 22.19.20-111-75233153-2018).

The claimed utility model can be used in the oil and gas, mining and other industries when pumping out various kinds of liquid media with mechanical impurities from wells. Thus, the proposed technical solution, due to its design features, can be used with thin-walled (5-7.4 mm.) Casing and tubing pipes, as well as easy and quick replacement of devices (for specific reservoir conditions of the well) on the pipe body in the field. without the use of adhesives or other means, thereby reducing replacement costs and logistics.

Claims (1)

A device for regulating the flow of media installed in the well on the lateral surface of the pipe between the tubular and the annular space, including a body, a cover, a movable disk located in the inner cavity of the body, and an additional channel, characterized in that it contains a funnel located between the cover and the disk, when In this case, the cover is made in the form of a nut with holes forming the entrance of the main passage for fluid, and the outlet of the main passage is located in the bottom of the body, a fixing element located in the inner cavity of the body and restricting the movement of the disc, in the inner cavity of the body, a membrane is located between the disc and the bottom of the body forming a cavity into which fluid flows from the additional channel to create additional pressure on the disk from below, while the additional channel is made in the form of a laminar fluid flow element, in the form of a twisted tube containing round loops, the section of the twisted tube corresponds to the outlet and inlet sections channel corp the mustache, through which the fluid enters the twisted tube, in the bottom of the body, in the cavity into which the fluid flows from the additional channel, there is a nozzle made in the form of a hole with a thin plate.

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