Submersible servo controller

Abstract

The utility model discloses a submersible servo controller, and relates to the technical field of controllers. Comprising a controller body, the controller body comprises a controller shell and a driving assembly arranged in the controller shell, the driving assembly comprises a radiator, one end of the radiator is provided with a capacitor support, the radiator is provided with an integrated mainboard, and the integrated mainboard is provided with a power module. Two sealing rings and redundancy design are adopted, and three-proofing treatment is combined, so that the failure rate of equipment in a 3000-meter deep well, 150-DEG C high-temperature and 30-MPa high-pressure environment is reduced to be lower than that of traditional equipment, the service life of a sealing system is greatly prolonged, the strict requirements of offshore oil fields and unconventional oil and gas development are met, and on the basis of a three-level closed-loop control system and a self-adaptive PWM modulation technology, the service life of the equipment is greatly prolonged. The torque fluctuation of the permanent magnet synchronous motor is greatly reduced, the speed control error is smaller, the DC bus voltage utilization rate is improved, and the energy loss caused by underground load fluctuation is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of controller, concretely is a kind of submersible servo controller. BACKGROUND

[0002] Servo driver is also called "servo controller" or "servo amplifier", it is a kind of controller to control servo motor, its function is similar to the function of frequency converter to ordinary ac motor, and it belongs to the part of servo system, and the submersible servo controller is applied to the downhole equipment such as submersible screw pump and reciprocating pump.

[0003] Traditional submersible drive system has multiple technical bottlenecks in complex downhole environment: on the one hand, high temperature and high pressure environment leads to high failure rate of electronic components, and sealing system is easy to be damaged; on the other hand, conventional driver control precision is insufficient, real-time optimization adjustment cannot be carried out according to the changing downhole liquid characteristics, leading to low energy utilization efficiency, short service life of equipment, and the failure rate of traditional submersible drive equipment is as high as 30% in 3000 meters deep well and environment with temperature exceeding 150 DEG C, and the average downtime is 5-7 days each time, and the direct economic loss is more than 500,000 yuan / time. SUMMARY

[0004] To achieve the above object, the utility model provides the following technical scheme: a submersible servo controller, including controller main body, the controller main body includes controller shell and the drive assembly that is arranged in the inside of controller shell, the drive assembly includes radiator, one end of the radiator is provided with capacitor support, one integral mainboard is arranged on the radiator, power module is arranged on the integral mainboard, capacitor main body is arranged in the inside of capacitor support.

[0005] As a preferred technical scheme of the utility model, one side of the radiator is provided with mounting groove, and the bottom of the power module is embedded in the inside of the mounting groove.

[0006] As a preferred technical scheme of the utility model, the side, away from mounting groove, of the radiator is provided with a plurality of heat dissipation fins, and a plurality of heat dissipation holes are arranged in the inside of the radiator.

[0007] As a preferred technical scheme of the utility model, capacitor plate is arranged in the inside of the controller shell, the capacitor main body is arranged on the capacitor plate, a plurality of assembly holes are arranged in the inside of the capacitor support, and the top of the capacitor main body extends to the inside of the assembly hole.

[0008] As a preferred technical scheme of the utility model, connecting heads are arranged at both ends of the radiator, and docking heads are arranged at both ends of the capacitor support, and the radiator and the capacitor support are connected by connecting heads and docking heads and matched with screws.

[0009] As a preferred technical scheme of the utility model, the both ends of the capacitor support are internally provided with baffles, the inside of the baffle is provided with a wire hole plug.

[0010] As a preferred technical scheme of the utility model, the capacitor support is connected with a fixing plate through a butt joint at one end away from the radiator, and an end cover is arranged at one end of the fixing plate away from the capacitor support.

[0011] As a preferred technical scheme of the utility model, the both ends of the controller shell are respectively provided with a shell rear plug and a shell front plug.

[0012] As a preferred technical scheme of the utility model, the shell rear plug and the shell front plug are both nested with double sealing rings at one end extending into the inside of the controller shell.

[0013] As a preferred technical scheme of the utility model, the one end of the shell rear plug extending into the inside of the controller shell is connected with the one end of the radiator away from the capacitor support through a connecting head, and the one end of the shell rear plug away from the radiator is provided with an I / O interface plug.

[0014] Compared with the prior art, the utility model provides a kind of submersible servo controller, with following beneficial effects:

[0015] The submersible servo controller adopts double sealing ring and redundancy design, combines three-proofing treatment, so that the failure rate of equipment in 3000 meters deep well, 150 DEG C high temperature and 30MPa high pressure environment is reduced to below traditional equipment, the service life of sealing system is greatly improved, meet the harsh needs of offshore oilfield and unconventional oil and gas development, based on three-level closed-loop control system and adaptive PWM modulation technology, greatly reduce the torque fluctuation of permanent magnet synchronous motor, speed control error is smaller, and improve the utilization rate of DC bus voltage, significantly reduce the energy loss caused by downhole load fluctuation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A kind of submersible servo controller structure schematic view is proposed for the utility model;

[0017] Figure 2 A kind of controller shell structure explosion drawing of submersible servo controller is proposed for the utility model;

[0018] Figure 3 A kind of drive assembly structure schematic view of submersible servo controller is proposed for the utility model;

[0019] Figure 4 A kind of drive assembly structure explosion drawing of submersible servo controller is proposed for the utility model;

[0020] Figure 5 The utility model provides a structure section view of submersible servo controller.

[0021] In the drawing: 1, controller main body;11, controller shell;111, shell rear plug;112, shell front plug;113, double seal ring;114, I / O interface plug;12, drive assembly;121, radiator;1211, connecting head;1212, heat dissipation hole;1213, heat dissipation fin;1214, installation groove;122, integrated mainboard;123, power module;124, capacitor support;1241, butt joint;1242, baffle;1243, wire hole plug;125, assembly hole;126, capacitor plate;127, capacitor main body;128, fixed plate;129, end cover. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0023] Please refer to Figures 1-5 A submersible servo controller, including controller main body 1, the controller main body 1 includes controller shell 11 and the drive assembly 12 arranged in the inside of controller shell 11, the drive assembly 12 includes radiator 121, one end of the radiator 121 is provided with capacitor support 124, the radiator 121 is provided with integrated mainboard 122, the integrated mainboard 122 is provided with power module 123, the inside of capacitor support 124 is provided with capacitor main body 127.

[0024] As a specific technical scheme of the embodiment, one side of the radiator 121 is provided with installation groove 1214, and the bottom of the power module 123 is embedded in the inside of the installation groove 1214.

[0025] In the embodiment, the capacitor plate 126 is electrically connected with the integrated main plate 122, the integrated main plate 122 is composed of a power plate and a control plate, the integrated main plate 122 adopts a three-level closed-loop control system and a PWM digital modulation technology, the three-level closed-loop control system includes a three-level closed-loop control architecture of a current loop (stabilizing torque), a speed loop (optimizing dynamic response) and a position loop (ensuring positioning accuracy), the current loop has a sampling period less than 10 μs, the motor phase current is monitored and adjusted in real time to ensure the stability of torque output and effectively inhibit the influence of downhole load fluctuation, the speed loop has a sampling period of 100-500 μs, based on high-precision encoder feedback, smooth acceleration and deceleration control is realized to reduce mechanical impact, and the position loop has a sampling period of 1-5 ms, and is used for application scenarios requiring accurate position control, such as accurate stroke control of a reciprocating pump.

[0026] The PWM digital modulation technology realizes accurate control of the permanent magnet synchronous motor through 16-bit high-precision duty cycle adjustment, the carrier frequency is adjustable in the range of 4-16 kHz and is adaptively optimized according to different well depths and load conditions, the dead time can be accurately adjusted to the level of 50 ns to effectively avoid the risk of bridge arm short circuit, and the over-modulation strategy adopts space vector PWM (SVPWM) technology to improve the utilization rate of the direct-current bus voltage and expand the speed regulation range.

[0027] As a specific technical solution of the embodiment, the heat dissipation fins 1213 are arranged on the side of the heat sink 121 away from the mounting groove 1214, the heat sink 121 is internally provided with a plurality of heat dissipation holes 1212, the inside of the controller shell 11 is provided with a capacitor plate 126, the capacitor body 127 is arranged on the capacitor plate 126, the inside of the capacitor support 124 is provided with a plurality of assembly holes 125, and the top of the capacitor body 127 extends into the inside of the assembly hole 125.

[0028] In the embodiment, the cooperation of the heat dissipation fins 1213 and the heat dissipation holes 1212 ensures the heat dissipation efficiency of the integrated main plate 122 and the power module 123, all components in the drive assembly 12 meet the working temperature range of-40 ℃ to 120 ℃, and military-grade products are selected for key components.

[0029] Three-proofing treatment: the integrated main plate 122 and the capacitor plate 126 are treated with three-proofing paint, which effectively prevents moisture, salt mist and mold;

[0030] Redundant design: the key sensors and control units adopt redundant design to ensure that a single point failure does not affect the normal operation of the system.

[0031] The system is widely applicable to conventional oilfield deep well oil production, unconventional oil and gas development, offshore oilfield development and high temperature and high pressure reservoir development.

[0032] Conventional oilfield deep well oil production: especially suitable for 3000 meters above deep well operation environment;

[0033] Unconventional oil and gas development: such as shale oil, tight oil and other complex geological conditions under the exploitation;

[0034] Offshore oilfield development: adapt to the high reliability demand under the marine environment;

[0035] High temperature and high pressure reservoir development: can effectively respond to more than 150 ℃ high temperature and 30 MPa high pressure environment.

[0036] As a specific technical solution of the embodiment, the two ends of the heat sink 121 are provided with connecting heads 1211, the two ends of the capacitor support 124 are provided with butt joints 1241, the heat sink 121 and the capacitor support 124 are connected through the connecting heads 1211 and the butt joints 1241 and locked by screws, the two ends of the capacitor support 124 are internally provided with baffles 1242, the inside of the baffle 1242 is provided with a wire hole plug 1243, and the end of the capacitor support 124 away from the heat sink 121 is connected with a fixing plate 128 through the butt joint 1241, and the end of the fixing plate 128 away from the capacitor support 124 is provided with an end cover 129.

[0037] As a specific technical solution of the embodiment, the two ends of the controller shell 11 are respectively provided with a shell rear plug 111 and a shell front plug 112, and the shell rear plug 111 and the shell front plug 112 are nested with double sealing rings 113 at one end extending into the inside of the controller shell 11.

[0038] In the embodiment, the two ends of the controller shell 11 are sealed by the double sealing rings 113, effectively preventing oil stains from entering the inside of the controller shell 11.

[0039] As a specific technical solution of the embodiment, the end of the shell rear plug 111 extending into the inside of the controller shell 11 is connected with the end of the heat sink 121 away from the capacitor support 124 through the connecting head 1211, and the end of the shell rear plug 111 away from the heat sink 121 is provided with an I / O interface plug 114.

[0040] In the embodiment, the I / O interface is arranged on the integrated mainboard 122, the I / O interface plug 114 is opposite to the I / O interface, the I / O interface belongs to the communication and interface module, and supports various field buses (such as CAN and Modbus) and wireless communication protocols.

[0041] In summary, the submersible servo controller adopts double sealing ring 113 and redundancy design, combined with three-proofing treatment, so that the failure rate of the device in 3000 meters deep well, 150 DEG C high temperature and 30 MPa high pressure environment is reduced to below the traditional device, the service life of the sealing system is greatly improved, the harsh needs of offshore oilfield and unconventional oil and gas development are met, based on three closed loop control system and adaptive PWM modulation technology, the torque fluctuation of permanent magnet synchronous motor is greatly reduced, the speed control error is smaller, and the utilization rate of DC bus voltage is improved, the energy loss caused by downhole load fluctuation is significantly reduced.

[0042] It should be noted that in this paper, such as the term "includes", "contains" or any other variant is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0043] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A subsurface electric servocntrrol comprising a controller body (1), characterized in that: The controller body (1) includes a controller shell (11) and a drive assembly (12) arranged inside the controller shell (11), the drive assembly (12) includes a radiator (121), one end of the radiator (121) is provided with a capacitor support (124), an integrated mainboard (122) is arranged on the radiator (121), a power module (123) is arranged on the integrated mainboard (122), and the capacitor support (124) is internally provided with a capacitor body (127).

2. An electrical submersible controller as defined in claim 1, wherein: One side of the radiator (121) is provided with a mounting groove (1214), and the bottom of the power module (123) is embedded in the inside of the mounting groove (1214).

3. An electrical submersible servomotor controller as defined in claim 1, wherein: The side of the radiator (121) away from the mounting groove (1214) is provided with a plurality of heat dissipation fins (1213), and the inside of the radiator (121) is provided with a plurality of heat dissipation holes (1212).

4. An electrical submersible servomotor controller as defined in claim 1, wherein: The inside of the controller shell (11) is provided with a capacitor plate (126), the capacitor body (127) is arranged on the capacitor plate (126), the inside of the capacitor support (124) is provided with a plurality of assembly holes (125), and the top of the capacitor body (127) extends into the inside of the assembly hole (125).

5. An electrical submersible servomotor controller as defined in claim 1, wherein: Both ends of the radiator (121) are provided with connecting heads (1211), both ends of the capacitor support (124) are provided with butt joints (1241), and the radiator (121) and the capacitor support (124) are connected by the connecting heads (1211) and the butt joints (1241) cooperating with screws.

6. An electrical submersible controller as defined in claim 1, wherein: The inside of both ends of the capacitor support (124) is provided with a baffle (1242), and the inside of the baffle (1242) is provided with a wire hole plug (1243).

7. An electrical submersible controller as defined in claim 1, wherein: One end of the capacitor support (124) away from the radiator (121) is connected with a fixing plate (128) through the butt joint (1241), and one end of the fixing plate (128) away from the capacitor support (124) is provided with an end cover (129).

8. An electrical submersible controller as defined in claim 1, wherein: Both ends of the controller shell (11) are respectively provided with a shell rear plug (111) and a shell front plug (112).

9. An electrical submersible controller as defined in claim 8, wherein: The end of the shell rear plug (111) and the shell front plug (112) extending into the inside of the controller shell (11) is nested with a double-seal ring (113).

10. An electrical submersible controller as defined in claim 8, wherein: One end of the shell rear plug (111) extending into the inside of the controller shell (11) is connected with one end of the radiator (121) away from the capacitor support (124) through the connecting head (1211), and one end of the shell rear plug (111) away from the radiator (121) is provided with an I / O interface plug (114).

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