RU2781027C1 - Rotor module, autonomous power generator containing rotor module, and pipe deposition control system including autonomous electric generator - Google Patents

Abstract

FIELD: rotary modules.

SUBSTANCE: inventions group relates to a rotary module, an autonomous electric generator with the indicated rotary module, as well as to a system for combating pipe deposits using the indicated autonomous electric generator. The module contains a prefabricated housing (8), consisting of the upper and lower parts (9, 10), made in the form of cups with a through axial cylindrical cutout in the bases (11, 12). In the housing (8) on the bearings (4, 5) there is a rotor (2), which is a hollow cylindrical body with a relief on the inner surface, in the cavity of which the fluid flow passes. At the upper and lower ends, the rotor (2) has annular support ledges (6, 7) facing the housing (8) intended for mounting the bearings (4, 5) into the seats formed in the housing (8). In this case, the bearings (4, 5) rest on the one side on the protrusions (6, 7), and on the other side in the bases (11, 12) and the walls of the cups.

EFFECT: invention is aimed at improving the efficiency, reliability and expanding the functionality of the rotor module, the electric generator, as well as the pipe deposit control system.

10 cl, 3 dwg

Description

The group of inventions relates to the field of power engineering and the oil and gas industry. The inventions are intended for use in autonomous turbines for generating electricity by converting the energy of the medium flow into mechanical energy of rotation, in particular, for powering downhole devices, instruments and equipment of various types, as well as for use as part of mini- and micro-hydroelectric power plants. It also seems relevant to use the rotor module of turbines as part of hydraulic drives, autonomous cogeneration plants and electric generators for power supply: in main and field pipelines, drives of shut-off, control and safety valves, electrochemical corrosion protection devices, measuring and diagnostic instruments.

Known rotor power generator downhole equipment containing a protective housing and at least one mount, electrical connector mounted on the shaft of the rotor with a turbine impeller [RF patent No. 2334099 C1, IPC E21V 47/00, priority date 09.01.2007 publication date 20.09.2008, author Bolotin N.B., RU].

The disadvantages of the invention include low reliability and functional limitation due to the fact that the device is installed inside the pipe and significantly narrows the free flow area, while the installation of a rotor with a turbine blade wheel leads to the destruction of the integrity of the flow, for example, an oil and gas core, as a result of which the gas can collapse on the blades, causing increased wear, also the rotor with a turbine impeller is significantly dependent on the properties of the flowing medium, for example, its density and viscosity.

A turbine device with a helical blade is known, containing at least one helical rotor rotating around its axis [publication number of the international application WO No. 2004/067957 A1, priority date 30.01.2003, publication date 01.28.2004, author: Eielsen J.I.; also published as a patent of the Russian Federation for the invention No. 2487262 C2, publication date 07/10/2013, author Eyelsen Y.I., NO].

The disadvantage of the invention is expressed in its functional limitation due to the fact that the device must be installed at an angle to the flow direction, as a result of which it is not possible to install the device in a limited space, for example, in a pipeline, since the pipe design does not allow the rotor to be installed at a large angle to the flow direction, and with a deviation at small angles of the rotor, the turbine will have low power, while the auxiliary turbine tilt assembly reduces its reliability.

The closest technical solution chosen as a prototype of the rotor module is the electric generator rotor, made in the form of a hollow cylindrical body with a relief on the inner surface, installed in bearings with the possibility of rotation around the axis of the hollow cylindrical body, while the inner surface of the hollow cylindrical body is made either with roughness, or with microrelief, or with macrorelief [RF patent No. 2695735 C1, IPC F15D 1/12, E21B 41/00, priority date 12/05/2018, publication date 07/25/2019, authors: Bashmur K.A., Petrovsky E. A., RU, prototype].

The disadvantages of the rotor module prototype include low efficiency, reliability and functional limitations of the design due to the fact that the device is unstable due to the installation of bearing assemblies in the rotor wall and their possible interaction with the medium flow, which can lead to increased corrosion and erosion wear, while the possibility of overhaul repair of wells under the action of excessive pressure in the annulus are limited, and on metal structures, more intensive formation of deposits is possible due to increased adhesion to hydrocarbons, while the flow power may not be enough to spin the rotor module.

The closest technical solution chosen as a prototype of the electric generator is a downhole electric generator containing a generator with an excitation winding, a rotator in the form of a bladeless turbine with a system of magnets, a piezoelectric generator unit, an AC converter [RF patent No. 2695735 C1, IPC F15D 1/12, E21B 41/00, priority date 12/05/2018, publication date 07/25/2019, authors: Bashmur K.A., Petrovsky E.A., RU, prototype].

The disadvantage of the prototype electric generator is low reliability, efficiency and functional limitations, expressed by the fact that the excitation winding and the system of magnets are located in the annulus, as a result of which it is impossible to use it and use the equipment during technological operations in the well associated with the annulus between the tubing string pipes and casing, for example: during well workover operations, in particular formation isolation; extraction of hydrocarbons using jet pumps; the use of downhole gas separators or degasifiers with fluid overflow into the casing, and the use of a metal rotor module can cause a lack of flow power to spin it up.

As a prototype system for combating pipe deposits, a well-known autonomous hybrid complex for combating asphalt-resin-paraffin deposits in an oil well was adopted, containing a heating module in the form of a heating cable connected to power sources in the form of wind and photovoltaic installations [RF patent No. 2703040 C1 , IPC E21B 36/04, E21B 37/00, priority date 06/19/2018, publication date 10/15/2019, authors: Velsky A.A., Dobush B.C., Mikhailov M.E., RU, prototype].

The disadvantages of the prototype system for dealing with pipe deposits are low efficiency, reliability and functional limitations due to the fact that the source of electricity is on the surface, while it is dependent on external factors and influences, for example, weather conditions, time and geographical scope of solar radiation, as well as the fact that the power cable is pulled throughout the entire pipe string, which increases energy losses in proportion to its length, makes it difficult to trip the string and increases the cost of the complex, while other devices are not used that provide additional methods of influence on deposits to combat them.

The technical problem solved by the inventions, united by a single inventive concept, is to increase the efficiency, reliability and expand the functionality of the rotor module, the electric generator, the new design solutions of which will significantly increase the efficiency of the pipe deposit control system.

To solve the technical problem, a rotor module is proposed, containing a rotor installed in bearings with the possibility of rotation around the longitudinal axis, which is a hollow cylindrical body with a relief on the inner surface, in the cavity of which a fluid flow passes, while the inner surface of the hollow cylindrical body is made or with a roughness , or with a microrelief, or with a macrorelief. What is new is that the rotor module contains a prefabricated body, consisting of the upper and lower parts, connected by a detachable connection and made in the form of cups with a through axial cylindrical cutout in their bases, and the rotor at the upper and lower ends has annular support ledges facing to the side. housing, and installed in the housing with the formation of seats, which are internal cavities in which bearings are installed, based on one side on the annular support ledges of the rotor, and on the other side in the bases and walls of the cups.

According to the invention, an annular groove is made at the base of the upper part of the housing with the formation of a cylindrical longitudinal protrusion directed towards the bearing, while the upper end of the annular support protrusion of the rotor is stepped for the installation of the upper bearing.

According to the invention, the lower end of the annular support ledge of the rotor is stepped for the installation of the lower bearing at the base of the lower part of the housing.

According to the invention, seals are installed between the bases of the cups and the rotor, adjoining the medium flow.

According to the invention, the rotor is made of a polymeric material.

To solve the technical problem, an autonomous electric generator is proposed, containing a stator with an excitation winding, a rotator in the form of a bladeless turbine with a system of magnets, a piezoelectric generator unit, and an AC converter. What is new is that, as a rotator, an autonomous electric generator contains at least one of the aforementioned rotary modules.

According to the invention, the piezoelectric generator block is placed in a separate module.

To solve the technical problem, a system for combating pipe deposits is proposed, containing a heating module connected to a power source. What is new is that the system contains at least one power source, made in the form of the aforementioned autonomous electric generator, and the autonomous electric generator contains a hydrodynamic module, made in the form of the aforementioned rotary module.

According to the invention, the system further comprises an energy storage and management module.

According to the invention, the system further comprises an ultrasonic vibration generation module.

Figure 1 shows a longitudinal section of the rotary module; figure 2 is a longitudinal section of an autonomous power generator; figure 3 is a diagram of a system for dealing with pipe deposits.

The rotor module 1 (figure 1) contains a rotor 2 made in the form of a hollow cylindrical body with a regular relief 3 on its inner surface, and the relief 3 may be a smooth surface with some roughness or microrelief or macrorelief. The rotor 2 is mounted in bearings 4 and 5. The cylindrical body of the rotor 2 at the upper and lower ends has annular support projections 6 and 7, respectively, and is installed in a prefabricated housing 8, consisting of the upper 9 and lower 10 parts connected by a detachable, in particular, threaded connection , and made in the form of a glass with a through axial cylindrical cut in its bases 11 and 12.

In the base 11 of the upper part of the housing 8, an annular groove 13 can be made to form a longitudinal cylindrical protrusion 14, while the upper end 15 of the annular support protrusion 6 of the rotor 2 is made stepped for the installation of the upper bearing 4.

The lower end 16 of the annular support ledge 7 of the rotor 2 is made stepped for the installation of the lower bearing 5 in the base 12 of the lower part of the housing.

Rotor 2 of module 1 can be made of polymeric material.

Between the bases of the glasses 11 and 12 and the rotor 2, seals 17 and 18 can be installed, adjoining the medium flow.

Autonomous electric generator 19 (figure 2) contains a rotator in the form of a bladeless turbine, which is used as a rotor module 1, as well as an excitation winding 20 fixed on the inner surface of the housing 8, which acts as a stator, and a system of permanent magnets 21 fixed on the outer surface rotor 2 coaxially located to the stator. Autonomous generator 19 may contain an AC converter (not shown).

Autonomous electric generator 19 may contain a piezoelectric generator block, which can be placed in a separate module 22, which in general may contain: packages of piezoelectric elements 23, electrodes (not shown), a protective film (not shown), perforated holes 24 for the output of electrodes.

The pipe deposit control system (figure 3) consists of a power source, which is an autonomous electric generator 19, a heating module 25 and a hydrodynamic module made in the form of a rotary module 1.

The pipe deposit control system (FIG. 3) may include an energy storage and control module 26 and an ultrasonic vibration generation module 27.

Various arrangements of modules 25 and 27 with respect to each other are possible, for example, modules 25 and 27 can follow each other and/or be on both sides of the power generator 19. Modules 25 and 27 can be used in the required number from the point of view of the formation of deposits .

The rotary module operates under the action of a moving medium flow as follows.

The fluid flow Q under pressure is fed into the cavity of the cylindrical body of the rotor 2, where, falling on the relief 3 tangentially located to the flow, it spins itself and spins the rotor 2 in the bearings 4 and 5.

To vary the degree of influence on the flow, relief 3 of different profiles can be used, in particular, a macrorelief or a microrelief.

The direction of fluid flow is not limited to what is indicated in the drawings. It can be such, for example, in the production of water and hydrocarbons, and when drilling wells, it can be either such or reverse (from top to bottom). When transporting media, the direction of flow can be in a horizontal plane.

It is possible to use the proposed device for generating mechanical energy of rotation. The mechanical (driving) force can be provided by rotating devices, such as rotary mechanisms, or by a fluid driven by the proposed device when exposed to the flow of the medium, as described above.

Autonomous electric generator operates under the action of a moving medium flow as follows.

When the flow acts on the working surface with relief 3, the rotor 2 sets in motion and starts autonomous rotation. In this case, by means of transmission mechanisms (not shown) or without them, the rotor 2 with the magnetic system 21 is untwisted and interacts with the stator winding 20, and, thus, the kinetic energy of its rotation is converted into electrical energy.

The kinetic energy of the fluid flow through the fluctuations excited by the flow is partially converted into the energy of elastic deformation of the packages of piezoelectric elements 23, which leads to the generation of electricity due to the direct piezoelectric effect.

The pipe deposit control system works as follows.

When the fluid flow Q passes through the hydrodynamic module, made in the form of a rotary module 1, it is converted into a pulsating turbulent flow, while it is subjected to an additional effect on the redistribution of the flow velocity by sequentially involving the flow layers, starting from the boundary, while giving the flow an additional peripheral speed by the rotating rotor module 1. This contributes to an increase in the temperature of the flow and leads to the creation of pressure fluctuations in the peripheral zone, preventing the formation of deposits.

An autonomous power generator 19 with a rotary module 1 converts the energy of the fluid flow Q into electrical energy, thereby generating alternating current. Current passing through an AC converter (not shown) is applied to heating module 25, which heats the pipe along the outer or inner surface, which in turn heats the flowing liquid to a temperature near or above the temperature of deposition of deposits. Current can also be applied to the ultrasonic oscillation module 27, which creates high frequency vibrations at the site of the formation of deposits, affecting the crystals of the deposit and causing them to micro-move, which prevents them from depositing on the walls of the pipes.

Electricity can be supplied to modules 25 and 27 directly, or stored in storage module 26 and used as needed.

Thus, the results of using the proposed inventions are: increasing the efficiency, reliability and expanding the functionality of the rotor module, the electric generator, as well as the system for combating pipe deposits, by: imparting stability to the rotor by installing it in the formed seats created inside the housing, and the possibility of making the rotor from polymeric materials, which reduces the cost of the required hydraulic power; giving tightness to the rotor and the electric generator by installing their working parts in a housing isolated from the environment; integration of the power source into the pipeline, which can reduce power losses, and also reduces the dependence on external environmental conditions, while using additional hydrodynamic and ultrasonic modules, which increases the efficiency of the system.

Claims (10)

1. A rotor module containing a rotor mounted in bearings for rotation around a longitudinal axis, which is a hollow cylindrical body with a relief on the inner surface, in the cavity of which a fluid flow passes, while the inner surface of the hollow cylindrical body is made either with a roughness, or with microrelief, or with a macrorelief, characterized in that the module contains a prefabricated body, consisting of an upper and lower parts connected by a detachable connection and made in the form of cups with a through axial cylindrical cutout at their bases, and the rotor has annular support projections at the upper and lower ends , facing towards the body, and installed in the body with the formation of seats, which are internal cavities in which bearings are installed, based on one side on the annular support ledges of the rotor, and on the other side in the bases and walls of the cups. 2. The rotor module according to claim 1, characterized in that an annular groove is made in the base of the upper part of the housing with the formation of a cylindrical longitudinal protrusion directed towards the bearing, while the upper end of the annular support protrusion of the rotor is stepped for the installation of the upper bearing. 3. The rotor module according to claim. 1, characterized in that the lower end of the annular support ledge of the rotor is stepped for the installation of the lower bearing at the base of the lower part of the housing. 4. The rotor module according to claim 1, characterized in that seals are installed between the bases of the cups and the rotor, adjoining the medium flow. 5. The rotor module according to claim 1, characterized in that the rotor is made of a polymeric material. 6. An autonomous electric generator containing a stator with an excitation winding, a rotator in the form of a bladeless turbine with a system of magnets, a piezoelectric generator unit, an AC converter, characterized in that it contains at least one rotary module as a rotator according to any one of paragraphs. 1-5. 7. An autonomous electric generator according to claim 6, characterized in that the piezoelectric generator unit is placed in a separate module. 8. The system for dealing with pipe deposits, containing a heating module connected to a power source, characterized in that it contains at least one power source made in the form of an autonomous power generator according to any one of paragraphs. 6, 7, moreover, an autonomous electric generator contains a hydrodynamic module made in the form of a rotary module according to any one of paragraphs. 1-5. 9. The system according to claim 8, characterized in that it additionally contains an energy storage and management module. 10. The system according to any one of paragraphs. 8, 9, characterized in that it additionally contains a module for ultrasonic vibration generation.

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