Large-displacement intelligent water distributor based on driving of hollow torque motor

Abstract

The utility model discloses a large-displacement intelligent water distributor based on hollow torque motor driving, and relates to the technical field of water distributors, the large-displacement intelligent water distributor comprises a main body frame structure, an internal transmission mechanism and an intelligent control system; the main body frame structure mainly comprises a lower end connecting piece, a lower end fixing assembly, a control system outer shell, a liquid passing pipe, a sensor connecting assembly, an outer shell, a transmission mechanism outer shell, a rotation stopping key, a valve shell assembly, a front end outer shell, an upper end fixing assembly and an upper end connecting piece. The internal transmission mechanism mainly comprises a dynamic sealing assembly A, a hollow torque motor, a motor coupler, a hollow speed reducer, a speed reducer output flange, a bearing check ring, a nut bearing check ring, a T-shaped nut, a T-shaped screw, a dynamic sealing assembly B, a column valve assembly, a pin, a thrust ball bearing and a deep groove ball bearing. The intelligent control system mainly comprises a lower end cable sleeve, a motor end wire passing pipe, a front end wire passing pipe A, a front end wire passing pipe B, an upper end cable sleeve and a control system.

Description

Technical Field

[0001] The invention relates to the field of water distributors, and more specifically to a large-displacement intelligent water distributor driven by a hollow torque motor. Background Art

[0002] The water injection wells in major oil fields such as Bohai Oilfield have many injection layers and large injection volumes, but traditional water distributors have problems such as large size, low energy efficiency, and slow response speed. In addition, existing injection process water distributors generally have low regulation efficiency and cannot meet the requirements of fine and efficient water injection in oil reservoirs.

[0003] The present invention uses a hollow torque motor as a driver, which has the characteristics of high power density, low inertia and high efficiency, and can achieve rapid response and precise control. In addition, the present invention is equipped with an intelligent control system that can monitor key parameters such as flow and pressure in real time, and combine with preset control strategies to achieve precise regulation and dynamic control of downhole flow, thereby improving the operation efficiency of the project and the utilization rate of water resources. Summary of the invention

[0004] The purpose of the present invention is to provide a large-displacement intelligent water distributor based on hollow torque motor drive, which is driven by a hollow torque motor and a hollow reducer, and has the advantages of large torque, high repeat positioning accuracy, concentric diameter, compact tool structure, etc.; and is equipped with an intelligent control system to realize intelligent monitoring and regulation of the water distributor flow, and combined with a column valve structure to realize stepless regulation of the flow;

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A large-displacement intelligent water distributor based on hollow torque motor drive, comprising a main frame structure, an internal transmission mechanism and an intelligent control system;

[0007] The main frame structure mainly includes a lower end connecting piece, a lower end fixing assembly, a control system outer shell, a liquid passing pipe, a sensor connecting assembly, an outer shell, a transmission mechanism outer shell, a stop key, a valve shell assembly, a front end outer shell, an upper end fixing assembly and an upper end connecting piece;

[0008] The internal transmission mechanism mainly includes dynamic seal assembly A, hollow torque motor, motor coupling, hollow reducer, reducer output flange, bearing retaining ring, nut bearing retaining ring, T-nut, T-screw, dynamic seal assembly B, column valve assembly, pin, thrust ball bearing and deep groove ball bearing;

[0009] The intelligent control system mainly includes the lower end cable sleeve, the motor end wire tube, the front end wire tube A, the front end wire tube dynamic sealing component B, the upper end cable sleeve and the control system;

[0010] Among them, a main frame part of a large-displacement intelligent water distributor driven by a hollow torque motor is threadedly connected in sequence by a lower end connector, a lower end fixing component, a control system outer shell, a sensor connecting component, an outer shell, a transmission mechanism outer shell, a valve shell component, a front end outer shell, an upper end fixing component and an upper end connector, and a stop key is installed on the transmission mechanism outer shell; a liquid pipe is installed between the lower end fixing component and the sensor connecting component to play a supporting and connecting role;

[0011] In the internal transmission mechanism, the hollow torque motor is connected to the hollow reducer through a motor coupling, the reducer output flange is connected to the hollow reducer rotor, the reducer output flange is spline-connected to the T-nut, the T-nut is connected to the T-screw thread pair, the front end of the T-screw is provided with a rotation-stop groove, and the column valve assembly is connected to the T-screw through a pin;

[0012] In the intelligent control system, the lower cable sleeve, the motor end wire tube, the front wire tube A, the front wire tube dynamic sealing assembly B, the upper cable sleeve and the holes reserved in other structures are connected in sequence to form a single-core cable routing tube. The energy and signal transmission of the equipment is completed through the cable, and the control system processes data and issues instructions.

[0013] Preferably, the water distributor adopts a valve port in the shape of a split oblong hole to prevent the occurrence of wax deposition, scaling, silt deposition, etc. in the well, while meeting the needs of large-volume water injection and intelligent regulation;

[0014] Preferably, sealing members are installed on both sides of the column valve assembly, and are deformed by squeezing the compression nut to achieve radial sealing between the column valve assembly and the valve housing assembly, thereby ensuring the sealing of the valve.

[0015] Preferably, dynamic seal components A and dynamic seal components B are installed on the left and right sides of the T-screw to achieve sealing of the motor cavity, ensure the stability of the hollow torque motor and the hollow reducer, and prevent damage due to water immersion.

[0016] Preferably, a thrust ball bearing and a deep groove ball bearing are provided on the T-nut, which are fixed and positioned by a nut bearing retaining ring, a bearing retaining ring, etc., to ensure axial compactness and rotational stability of the T-nut;

[0017] Preferably, the inner diameter of the hollow torque motor rotor and the hollow reducer is not less than 55mm, so as to ensure that the inner diameter of the T-screw is not less than 45mm, and finally ensure that the flow rate of the water distributor is not less than 1600m3 / d, and the large output torque ensures the smooth adjustment of the column valve assembly;

[0018] Preferably, the hollow torque motor has a built-in angle sensor, which can control and detect the rotor rotation angle and positioning accuracy, thereby realizing the functions of reciprocating linear motion positioning and opening detection of the column valve assembly;

[0019] Preferably, the intelligent water distributor is provided with a pressure sensor and a temperature sensor inside, which can detect the pressure and temperature of the equipment working underground, and the values ​​are finally fed back to the control system on the well;

[0020] The beneficial effects of the large-displacement intelligent water distributor driven by a hollow torque motor of the present invention are as follows:

[0021] 1. The present invention adopts a hollow torque motor to realize stepless adjustment of the opening of the column valve of the intelligent water distributor, which reduces the transmission links, improves the mechanical efficiency, and enhances the working reliability; and the large output torque ensures the normal opening of the intelligent water distributor under the pressure difference between the inside and outside of not less than 15MPa;

[0022] 2. The intelligent water injector has a large flow area at the valve port, a production pressure difference of 1MPa, and a flow rate of 1600m3 / d, which can meet the large-volume water injection needs of the oil field;

[0023] 3. The present invention; the intelligent water distributor control system can monitor and control the flow in real time according to production requirements, improve production efficiency and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] Figure 1 This is the overall structure diagram of a large-displacement intelligent water distributor driven by a hollow torque motor;

[0026] Figure 2 It is a schematic diagram of a transmission mechanism of a large-displacement intelligent water distributor driven by a hollow torque motor;

[0027] Figure 3 It is a schematic diagram of a full flow state of a large-displacement intelligent water distributor driven by a hollow torque motor;

[0028] Figure 4 It is a schematic diagram of the closed state of a control valve of a large-displacement intelligent water distributor driven by a hollow torque motor;

[0029] Figure 5 A schematic diagram of a communication method for a large-displacement intelligent water distributor driven by a hollow torque motor;

[0030] Figure 6 This is a schematic diagram of a process column for a large-displacement intelligent water distributor driven by a hollow torque motor.

[0031] In the figure: 1. lower end connecting piece; 2. lower end cable sleeve; 3. lower end fixing assembly; 4. control system outer shell; 5. liquid pipe; 6. sensor connection assembly; 7. outer shell; 8. motor end wire tube; 9. dynamic seal assembly A; 10. transmission mechanism shell; 11. hollow torque motor; 12. motor coupling; 13. hollow reducer; 14. reducer output flange; 15. bearing retaining ring; 16. nut bearing retaining ring; 17. T-nut; 18. T-screw; 19. dynamic seal assembly B; 20. front end wire tube A; 21. valve shell assembly; 22. column valve assembly; 23. front end outer shell; 24. front end wire tube dynamic seal assembly B; 25. upper end fixing assembly; 26. upper end cable sleeve; 27. upper end connecting piece; 28. pin; 29. ​​stop key; 30. thrust ball bearing; 31. deep groove ball bearing; 32. control system;

[0032] 1-1, ground control box; 1-2, carrier synthesis and separation circuit; 1-3, downhole tools;

[0033] 2-1. Cable control box; 2-2. Armored cable; 2-3. Oil pipe; 2-4. Casing; 2-5. Cable packer; 2-6. Intelligent water distributor. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] like Figure 1 As shown, the present invention is a large-displacement intelligent water distributor based on hollow torque motor drive, including a main frame structure, an internal transmission mechanism and an intelligent control system; the main frame structure mainly includes a lower end connecting piece 1, a lower end fixing component 3, a control system outer shell 4, a liquid pipe 5, a sensor connecting component 6, an outer shell 7, a transmission mechanism outer shell 10, a stop key 29, a valve shell component 21, a front end outer shell 23, an upper end fixing component 25 and an upper end connecting piece 27; the internal transmission mechanism mainly includes a dynamic sealing component A 9. Hollow torque motor 11, motor coupling 12, hollow reducer 13, reducer output flange 14, bearing retaining ring 15, nut bearing retaining ring 16, T-nut 17, T-screw 18, dynamic seal assembly B19, column valve assembly 22, pin 28, thrust ball bearing 30 and deep groove ball bearing 31; the intelligent control system mainly includes the lower end cable sleeve 2, the motor end wire tube 8, the front end wire tube A20, the front end wire tube dynamic seal assembly B24, the upper end cable sleeve 26 and the control system 32;

[0036] Combination Figure 1 and Figure 2, a large-displacement intelligent water distributor driven by a hollow torque motor has a main frame portion which is threadedly connected in sequence by a lower end connector 1, a lower end fixing component 3, a control system housing 4, a sensor connecting component 6, a housing 7, a transmission mechanism housing 10, a valve housing component 21, a front end housing 23, an upper end fixing component 25 and an upper end connector 27, a stop key 29 is installed on the transmission mechanism housing, and a liquid-passing pipe 5 is installed between the lower end fixing component 3 and the sensor connecting component 6 to play a supporting and connecting role; in the internal transmission mechanism portion, a hollow torque motor 11 is connected to a hollow reducer 13 through a motor coupling 12, a reducer output flange 14 is connected to the rotor of the hollow reducer 13, the reducer output flange 14 is splined with a T-nut 17, the T-nut 17 is threadedly connected with a T-screw 18, a stop groove is provided at the front end of the T-screw 18, and a column valve component 22 is connected to the T-screw 18 through a pin 28;

[0037] The intelligent control system is composed of the lower cable sleeve 2, the motor end wire tube 8, the front end wire tube A20, the front end wire tube dynamic seal assembly B24, the upper cable sleeve 26 and the holes reserved by other structures, which are connected in sequence to form a single-core cable routing tube. The energy and signal transmission of the equipment are completed through the cable, and the control system 32 performs data processing and command issuance;

[0038] The water distributor adopts a valve port in the shape of a split oblong hole to prevent the occurrence of wax, scaling, siltation and other phenomena in the well, while meeting the needs of large-volume water injection and intelligent regulation;

[0039] The sealing members are installed on the front and rear sides of the column valve assembly 22, and are deformed by squeezing the compression nut to achieve radial sealing between the column valve assembly 22 and the valve housing assembly 21, thereby ensuring the sealing performance of the valve.

[0040] The dynamic seal assembly A9 and the dynamic seal assembly B19 are installed on the left and right sides of the T-screw 18 to achieve the sealing of the motor cavity, ensure the use stability of the hollow torque motor 11 and the hollow reducer 13, and prevent damage due to water immersion.

[0041] The T-nut 17 is provided with a thrust ball bearing 30 and a deep groove ball bearing 31, which are fixed and positioned by a nut bearing retaining ring 16, a bearing retaining ring 15, etc., to ensure axial compactness and rotation stability of the T-nut 17;

[0042] The inner diameter of the hollow torque motor 11 rotor and the hollow reducer 13 is not less than 55 mm, so as to ensure that the inner diameter of the T-screw 18 is not less than 45 mm, and finally ensure that the flow rate of a large-displacement intelligent water distributor driven by a hollow torque motor is not less than 1600 m3 / d, and the large output torque ensures the smooth adjustment of the column valve assembly 22;

[0043] The hollow torque motor 11 has a built-in angle sensor, which can control and detect the rotor rotation angle and positioning accuracy, thereby realizing the functions of reciprocating linear motion positioning and opening detection of the column valve assembly 22;

[0044] like Figure 3 and Figure 4 The figure shows the schematic diagram of the valve group of the water distributor in two regulating states: fully open and fully closed;

[0045] The intelligent water distributor is internally provided with a pressure sensor and a temperature sensor, which can detect the pressure and temperature of the equipment when it is working underground, and the values ​​are finally fed back to the control system above the well;

[0046] like Figure 5 As shown, a communication method of a large-displacement intelligent water distributor driven by a hollow torque motor adopts a carrier communication method, in which a ground control box 1-1 transmits a carrier signal and a DC voltage through a cable. After coupling and separation processing in a carrier synthesis circuit, the voltage is used for power supply and operation of downhole tools 1-3. The carrier signal enters the carrier circuit and is converted into serial port data to realize data transmission such as opening commands, thereby realizing a stratified water injection process based on carrier communication; wherein voltage transmission is unidirectional transmission, and carrier communication is bidirectional transmission;

[0047] The carrier communication adopts the frequency shift keying (FSK) standard, superimposing the carrier signal on the DC power supply, the carrier signal is a 1200HZ and 2200HZ sine wave signal, when the 2200HZ sine wave signal is transmitted, it represents the transmission data is 0, when the 1200HZ sine wave signal is transmitted, it represents the transmission data is 1. The average value of the transmitted carrier signal is 0 and the phase is continuous. At the same time, when the data 1 and 0 are changed, the phase angle of the signal boundary is continuous, and the average value of the carrier signal is zero, which will not have any effect on the carrier signal;

[0048] At the same time, the DC power supply voltage is stable and the signal frequency is 0, which will not affect the carrier communication. In summary, the DC carrier signal transmission signal is stable and the signal transmission reliability is high.

[0049] like Figure 6 In the schematic diagram of a process string of a large-displacement intelligent water distributor driven by a hollow torque motor, a cable packer 2-5 and an intelligent water distributor 2-6 are connected in series in a downhole casing 2-4 through an oil pipe 2-3, a steel armored cable 2-2 passes through a downhole tool cable channel and is connected to the cable packer 2-5 and the intelligent water distributor 2-6 in sequence, a cable control box 2-1 transmits a DC voltage and a carrier signal through the steel armored cable 2-2, and each layer of intelligent water distributors 2-6 receives the carrier signal to adjust the opening, thereby realizing stratified water injection;

[0050] In actual work, when the intelligent water injector is lowered to the predetermined position, the hollow torque motor 11 receives the opening adjustment command sent by the control system 32, and the hollow torque motor 11 rotates forward to drive the hollow reducer 13 to rotate, and the rotor of the hollow reducer 13 drives the T-nut 17 to rotate through the reducer output flange 14; the T-nut 17 is connected to the T-screw 18 thread pair, and the front end of the T-screw 18 is provided with a stop groove. When the T-nut 17 rotates, the T-screw 18 drives the column valve assembly 22 to move linearly through the thread pair and the stop groove; the column valve assembly 22 and the T-screw 18 are matched with a circumferential pin 28 to eliminate the influence of the coaxiality difference; thereby, the valve opening can be regulated, and then the flow rate can be steplessly regulated. The internal pressure sensor and temperature sensor can detect the temperature of the equipment working underground, and the value is finally fed back to the control system on the well.

[0051] The above-mentioned specific implementation is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-displacement intelligent water distributor driven by a hollow torque motor, characterized in that: It includes the main frame structure, internal transmission mechanism and intelligent control system; among which: The main frame structure mainly comprises a lower end connecting member (1), a lower end fixing assembly (3), a control system outer shell (4), a liquid passing pipe (5), a sensor connecting assembly (6), an outer shell (7), a transmission mechanism outer shell (10), a stop key (29), a valve shell assembly (21), a front end outer shell (23), an upper end fixing assembly (25) and an upper end connecting member (27); The internal transmission mechanism mainly includes a dynamic seal assembly A (9), a hollow torque motor (11), a motor coupling (12), a hollow reducer (13), a reducer output flange (14), a bearing retaining ring (15), a nut bearing retaining ring (16), a T-nut (17), a T-screw (18), a dynamic seal assembly B (19), a column valve assembly (22), a pin (28), a thrust ball bearing (30) and a deep groove ball bearing (31); The intelligent control system mainly comprises a lower end cable sleeve (2), a motor end wire tube (8), a front end wire tube A (20), a front end wire tube dynamic sealing assembly B (24), an upper end cable sleeve (26) and a control system (32); The main frame part is threadedly connected in sequence by a lower end connecting piece (1), a lower end fixing assembly (3), a control system outer shell (4), a sensor connecting assembly (6), an outer shell (7), a transmission mechanism outer shell (10), a valve shell assembly (21), a front end outer shell (23), an upper end fixing assembly (25) and an upper end connecting piece (27); A stop key (29) is installed on the transmission mechanism housing; the liquid passage pipe (5) is installed between the lower end fixing component (3) and the sensor connecting component (6); The internal transmission mechanism is composed of a hollow torque motor (11) connected to a hollow reducer (13) through a motor coupling (12); the rotor of the hollow reducer (13) is connected to a reducer output flange (14); the reducer output flange (14) is spline-connected to a T-nut (17); the T-nut (17) is thread-connected to a T-screw (18); a stop groove is provided at the front end of the T-screw (18); the column valve assembly (22) is connected to the T-screw (18) through a pin (28); The intelligent control system part includes a lower end cable sleeve (2), a motor end wire tube (8), a front end wire tube A (20), a front end wire tube dynamic sealing component B (24) and a hole reserved by the upper end cable sleeve (26), which are connected in sequence to form a single-core cable routing tube. The energy and signal transmission of the equipment are completed through the cable, and the control system (32) performs data processing and command issuance.

2. According to claim 1, a large-displacement intelligent water distributor driven by a hollow torque motor is characterized in that: The water distributor adopts a double-opening oblong hole-shaped valve port to prevent the occurrence of wax, scaling, and silt accumulation in the well, while meeting the needs of large-volume water injection and intelligent regulation.

3. According to claim 1, a large-displacement intelligent water distributor driven by a hollow torque motor is characterized in that: Sealing members are installed on both the front and rear sides of the column valve assembly (22), and are deformed by squeezing through a compression nut, thereby achieving radial sealing between the column valve assembly (22) and the valve housing assembly (21).

4. According to claim 1, a large-displacement intelligent water distributor driven by a hollow torque motor is characterized in that: A dynamic seal assembly A (9) and a dynamic seal assembly B (19) are installed on the left and right sides of the T-shaped screw rod (18) to ensure the stability of the hollow torque motor (11) and the hollow reducer (13).

5. According to claim 4, a large-displacement intelligent water distributor driven by a hollow torque motor is characterized in that: The inner diameter of the hollow torque motor (11) rotor and the hollow reducer (13) is not less than 55 mm, so as to ensure that the inner diameter of the T-screw (18) is not less than 45 mm, and finally ensure that the flow rate of the water distributor is not less than 1600 m3 / d; the large output torque ensures the smooth adjustment of the column valve assembly (22).

6. The large-displacement intelligent water distributor based on hollow torque motor drive according to claim 5 is characterized by: The hollow torque motor (11) has a built-in angle sensor, which can control and detect the rotor rotation angle and positioning accuracy, thereby realizing the functions of reciprocating linear motion positioning and opening detection of the column valve component (22).

7. The large-displacement intelligent water distributor driven by a hollow torque motor according to claim 1, characterized in that: The intelligent water distributor is internally provided with a pressure sensor and a temperature sensor, which can detect the pressure and temperature of the equipment when it is working underground, and the values ​​are finally fed back to the control system above the well.

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