CN115749700A - Electronic gas lift plunger - Google Patents

Abstract

Providing an electronic gas lift plunger, wherein a flow guide hole and a flow guide channel which are arranged on the wall surface of the lower end of a plunger main body are mutually communicated, and a sealed inner shell is arranged in the plunger main body; a power supply device, a microcontroller, a data acquisition module and a positioning module are integrated and sealed in the sealed inner shell, and a temperature and pressure measuring head in the data acquisition module is communicated with accumulated liquid in a shaft through a measuring hole and a bypass hole in the sealed inner shell; microcontroller and power supply unit electric connection and data acquisition module and orientation module signal output part are connected with microcontroller's input. The invention solves the problems that the traditional plunger can not collect data such as underground temperature, pressure intensity, acceleration, liquid loading height and the like, can not monitor and calculate the position depth of the plunger in a shaft, and can not accurately evaluate the operation effect of the plunger drainage process, can determine the movement stroke track of gas lift plunger drainage gas production according to the collected data, and can judge whether the gas lift plunger can reach the position of a well bottom in each drainage gas production stroke.

Description

Electronic gas lift plunger

technical field

The invention belongs to the technical field of downhole testing instruments, and in particular relates to an electronic gas lift plunger.

Background technique

The gas-lift plunger drainage gas recovery process uses the gas-lift plunger to form a mechanical interface between the lift gas and the production fluid, thereby increasing the lift efficiency. For wells with low efficiency of conventional continuous gas lift or intermittent gas lift, the use of gas lift plunger can effectively prevent gas channeling and liquid slippage, and improve production efficiency. The air-lift plunger makes periodic up-and-down reciprocating movements between the shock-absorbing spring in the oil pipe and the anti-nozzle pipe, and the work of the whole system is completed by the controller controlling the switch of the pneumatic membrane valve. When the pneumatic membrane valve is closed, the plunger falls under its own weight. While the plunger is going down, the energy accumulation at the bottom of the well recovers. When the casing pressure accumulation returns to a certain value, the controller automatically opens the pneumatic membrane valve, and the gas flows rapidly. It enters the tubing from the casing hole, and together with the gas generated in the formation, pushes the plunger and its upper liquid slug to move upwards until the plunger and its upper liquid are lifted to the ground.

With the continuous exploitation of natural gas, the energy and gas production efficiency of gas wells are gradually reduced, and it is necessary to know the data of depth, temperature, pressure, acceleration and fluid accumulation height in the well; The lifting plunger reciprocates up and down in the oil pipe with a length of several kilometers, and its drainage and gas recovery movement is unknown. At the same time, the underground space is completely enclosed. Not only the satellite positioning signal cannot penetrate the rock formation, but also the radio signal cannot pass through the narrow natural gas field. Receiving and using in the well; the harsh environment downhole seriously restricts the application of various positioning technologies in the downhole of natural gas. Therefore, based on the above-mentioned problems faced by the downhole environment of the wellbore, it is necessary to research and develop the positioning technology suitable for the downhole work of the wellbore.

Contents of the invention

The technical problem solved by the present invention is to provide an electronic gas lift plunger. By optimizing the plunger structure, a power supply device, a microcontroller, a data acquisition module for detecting downhole temperature and pressure information, and a data acquisition module for detecting downhole product The sealed inner shell of the liquid position positioning module is embedded in the main body of the plunger, which solves the problem that the traditional plunger cannot collect data such as downhole temperature, pressure, acceleration, and fluid height, and cannot monitor and calculate the position, depth, and depth of the plunger in the wellbore. The operation effect of the drainage process cannot be accurately evaluated. Based on the collected data, the movement trajectory of the gas-lift plunger for drainage and gas production can be determined, and it can be judged whether the gas-lift plunger can reach the bottom of the well during each drainage and gas production stroke.

The technical solution adopted in the present invention: electronic gas lift plunger, including a plunger body that is located in a wellbore formed by connecting several oil pipes head to tail and periodically reciprocating up and down, the lower end of the plunger body is fixed with a plug and The upper end is fixed with a fishing head, and the diversion hole and the diversion channel arranged on the lower end wall of the plunger body communicate with each other, and a plurality of communication channels with the inner center of the plunger body are formed on the tapered outer wall of the upper end of the plunger body A connected circulation channel; the plunger body is provided with a sealed inner shell, and the bottom fluid is circulated through the diversion hole, the diversion channel, the gap between the sealed inner shell and the inner hole wall of the plunger body, and the center The channel flows to the circulation channel; the sealed inner shell is integrated and sealed with a power supply device, a microcontroller, a data acquisition module for detecting downhole temperature and pressure information, and a positioning module for detecting the location of the downhole fluid accumulation. The temperature and pressure measuring head in the acquisition module communicates with the effusion in the wellbore through the measurement hole and bypass hole on the sealed inner shell; the microcontroller is electrically connected to the power supply device, and the signal output of the data acquisition module and the positioning module The terminal is connected to the input terminal of the microcontroller.

Wherein, the sealed inner case includes a battery protective case, a lower inner case and an end cover, the battery protective case is a hollow structure with a sealed upper end and an open lower end, and the lower inner case is a stepped sleeve structure with upper and lower ends opened, so The opening of the battery protection cover is positioned downward on the lower inner case, and the sealing groove on the inner wall of the lower end of the battery protection cover is provided with a sealing ring in contact with the outer wall of the lower inner case. The baffle ring on the shell, the lower end surface of the baffle ring is against the positioning platform on the outer wall of the lower inner shell, and the upper end surface of the baffle ring is in contact with the lower end surface of the battery protection sleeve, and the outer wall of the baffle ring is formed with a hole corresponding to the position of the bypass hole. The lower port of the lower inner shell is sealed with an end cover, and the power supply device, microcontroller, data acquisition module and positioning module are all installed in the inner cavity formed by the battery protection sleeve and the lower inner shell.

Further, the data acquisition module includes a temperature-pressure integrated sensor, which is used for positioning the mounting groove on the outer wall of the lower inner shell of the retaining ring, and the temperature-pressure measuring head is embedded and installed toward the temperature-pressure integrated sensor of the retaining ring In the tank, the temperature-pressure integrated sensor is connected to the input end of the microcontroller through a signal line.

Further, the positioning module includes a primary positioning device, a secondary positioning device and a tertiary positioning device.

Further, the primary positioning device includes an acceleration sensor, the acceleration sensor is positioned and installed in the lower inner shell, and the acceleration sensor is connected to the input terminal of the microcontroller through a signal line.

Further, the secondary positioning device adopts a metal signal detection module, and the metal signal detection module includes an inductance-to-digital converter and a search generator, and the inductance-to-digital converter and the search generator are installed on the inverted T-shaped ring structure. On both sides of the support ring frame, the protective sleeve provided on the upper end surface of the inductance digital converter and the search generator is pressed against the positioning ring in the inner hole of the lower inner shell through an oil-resistant rubber pad, and the protective sleeve provided on the lower end surface of the support ring frame The search generator is connected to the inductance-to-digital converter through an oil-resistant rubber pad against the upper end surface of the end cover, and the output terminal of the inductance-to-digital converter is connected to the input terminal of the microcontroller. The hoops are firmly connected as a whole, and the change information of the magnetic flux when the search generator passes through the induction metal oil pipe coupling between the two oil pipes is fed back to the microcontroller through the inductance-to-digital converter.

Further, the oil-resistant rubber pad is made of latex material, and the search generator is made of a flexible PCB coil.

Further, the three-level positioning device includes several electronic tags and FID-RC522 modules, the outer walls of several oil pipes are glued and fixed with electronic tags, and the outer surface of the electronic tags is pasted with a wear-resistant and corrosion-resistant transparent protective film , the depth of the oil pipe in the wellbore, the thickness of the pipe wall and the diameter information are stored in the corresponding electronic tags, the FID-RC522 module is located above the primary positioning device and installed in the lower inner shell, the FID-RC522 module The output end of the FID-RC522 module is connected with the input end of the microcontroller located above it, and the FID-RC522 module is wirelessly connected with the electronic tag on the outer wall of the oil pipe at the corresponding position during the movement of the plunger body, so that the depth position of the oil pipe is stored on the electronic tag Send the information to the FID-RC522 module.

Further, the power supply device includes a battery pack and an aviation quick connector, the battery pack and the aviation quick connector are sequentially positioned and installed inside the battery protective case from top to bottom, the battery pack is electrically connected to the upper end of the aviation quick connector, and The lower end of the aviation quick connector is electrically connected with the microcontroller below it.

Further, the first and last ends of several oil pipes are fixedly connected as a whole by metal oil pipe couplings.

Advantage of the present invention compared with prior art:

1. This technical solution optimizes the structure of the plunger so that the bottom well fluid flows from the diversion hole, the diversion channel, the gap between the sealed inner shell and the inner hole wall of the plunger main body, and the central circulation channel to the circulation channel, while The temperature and pressure measuring head in the data acquisition module communicates with the fluid accumulation in the wellbore through the measurement hole and the bypass hole on the sealed inner shell, providing conditions for the data acquisition module to measure the temperature and pressure data of the fluid accumulation in the wellbore, and the measurement is accurate and reliable ;

2. In this technical solution, a positioning module is set in the sealed inner shell of the plunger body to realize the determination of the position and height of the downhole liquid accumulation and the trajectory of the gas-lift plunger drainage and gas recovery movement, providing data detection conditions for each judgment Whether the gas-lift plunger can reach the bottom of the well during the drainage and gas production stroke provides a basis for judging;

3. This technical solution solves the problems that the traditional plunger cannot collect data such as downhole temperature, pressure, acceleration, fluid height, etc., cannot monitor and calculate the position and depth of the plunger in the wellbore, and cannot accurately evaluate the effect of the plunger drainage process. Provide data for downhole environment research, simple structure, novel design, reliable installation structure.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the installation structure of the power supply device, microcontroller, data acquisition module and positioning module integrated in the sealed inner shell of the present invention;

Fig. 3 is a schematic diagram of the structure of the present invention located in a wellbore.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with Figures 1-3 in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that, in this document, the terms "comprising", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or apparatus. without further restrictions. An element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or device comprising said element.

The electronic gas lift plunger, as shown in Figure 1-3, includes a plunger body 2 that is located in a wellbore formed by connecting several oil pipes 1 head to tail and periodically reciprocates up and down, wherein the head and tail of several oil pipes 1 The two ends are connected together by metal oil pipe collars 24; the lower end of the plunger main body 2 is fixed with a plug 5 and the upper end is fixed with a fishing head 10, and the diversion hole is arranged on the lower end wall of the plunger main body 2 8 and the diversion channel 6 communicate with each other, and the upper conical outer wall of the plunger body 2 is formed with a plurality of flow channels 7 communicating with the central flow channel 9 inside the plunger body 2; the inside of the plunger body 2 is provided with a seal type inner shell 3, and the bottom well fluid flows from the diversion hole 8, the diversion channel 6, the gap between the sealed inner shell 3 and the inner hole wall of the plunger main body 2, and the central circulation channel 9 to the circulation channel 7; The sealed inner shell 3 is integrated and sealed with a power supply device, a microcontroller 4, a data acquisition module for detecting downhole temperature and pressure information, and a positioning module for detecting the position of downhole fluid accumulation. The temperature in the data acquisition module The pressure measuring head communicates with the effusion in the wellbore through the measuring hole 12 and the bypass hole 11 on the sealed inner shell 3; the microcontroller 4 is electrically connected to the power supply device, and the signal output terminals of the data acquisition module and the positioning module It is connected to the input end of the microcontroller 4; in the above structure, by optimizing the structure of the plunger, the fluid in the bottom hole is passed between the diversion hole 8, the diversion channel 6, the sealed inner shell 3 and the wall of the inner hole of the plunger body 2 The gap between (this gap is only for the flow of effusion, not more than 0.5mm), the central flow channel 9 flows to the flow channel 7, and the temperature and pressure measuring head in the data acquisition module passes through the measurement hole 12 on the sealed inner shell 3 The bypass hole 11 is connected with the fluid in the wellbore to provide conditions for the data acquisition module to measure the temperature and pressure data of the downhole fluid, and the measurement is accurate and reliable;

The specific structure of the sealed inner case 3 is as follows: the sealed inner case 3 includes a battery protection cover 3-1, a lower inner case 3-2 and an end cover 3-3, and the battery protection cover 3-1 is sealed at the upper end. A hollow structure with an open lower end, the lower inner shell 3-2 is a stepped cover structure with upper and lower ends open, the battery protective cover 3-1 is positioned on the lower inner shell 3-2 with the opening facing downward, and the battery protective cover 3 -1 The sealing groove 3-4 on the inner wall of the lower end is provided with a sealing ring in contact with the outer wall of the lower inner shell 3-2, and a retaining ring set on the lower inner shell 3-2 is provided under the battery protection cover 3-1 3-5, the lower end surface of the retaining ring 3-5 is against the positioning platform on the outer wall of the lower inner shell 3-2, and the upper end face of the retaining ring 3-5 is in contact with the lower end face of the battery protection case 3-1, and the retaining ring The outer wall of 3-5 is formed with a measuring hole 12 corresponding to the position of the bypass hole 11, and the lower port of the lower inner shell 3-2 is sealed with an end cover 3-3, which plays the role of axial positioning and waterproof sealing. The above-mentioned power supply device, microcontroller 4, data acquisition module and positioning module are all installed in the inner cavity formed by the battery protection cover 3-1 and the lower inner shell 3-2; in the above structure, the plunger main body 2 is made of non-magnetic non-metal In order to ensure the installation reliability of the sealed housing 3 in the plunger main body 2, it is required that the internal hollow size of the plunger main body 2 must match the size of the sealed inner housing 3, and a gap of 0.5mm is sufficient. With a gap of 0.5mm, a plurality of bosses with a thickness not exceeding 0.5mm can be arranged on the outer wall of the battery protection cover 3-1 and the lower inner casing 3-2. After the sealed inner casing 3 is installed in the inner hole of the plunger body , the bosses on the outer wall of the battery protection cover 3-1 and the lower inner shell 3-2 are against the inner wall of the plunger main body 2, thereby facilitating the fluid to pass smoothly through the gap between the outer wall of the sealed inner shell 3 and the inner wall of the plunger main body 2 At the same time, the stability of the sealed inner shell 3 after being installed in the plunger main body 2 is ensured;

Wherein, the data acquisition module is specifically as follows: the data acquisition module includes a temperature and pressure integrated sensor 13, which is used to locate the lower inner shell 3-2 outer wall of the retaining ring 3-5 of the suit. The temperature-pressure integrated sensor 13 with the head facing the stop ring 3-5 is embedded in the installation groove. The temperature-pressure integrated sensor 13 is connected to the input end of the microcontroller 4 through a signal line, and the temperature-pressure integrated sensor 13 is connected through a bypass hole. 11. It can sense the external temperature and pressure information of the plunger, and transmit the measured temperature and pressure information to the microcontroller 4, which is calculated and stored by the microcontroller 4;

The temperature and pressure integrated sensor 13 is a high-resolution temperature and pressure sensor DA33L. DA33L is small in size, low in cost, low in power consumption, highly reliable and has waterproof and anti-corrosion functions. Using temperature and pressure integrated sensor, 13 can measure downhole temperature and pressure at the same time information, because the pressure signals of the plunger upward and plunger falling stages are obviously different, and the obtained pressure signal can be used to judge whether the plunger is in the falling stage; The rock formation will cause the temperature data to change, and the stroke of the plunger running at a higher temperature can be used as the basis for quantitative judgment of the length and volume of the lifted effusion;

The specific structure of the positioning module is as follows: the positioning module includes a primary positioning device, a secondary positioning device and a tertiary positioning device;

Described primary positioning device comprises acceleration sensor 14, and described acceleration sensor 14 is positioned and installed in the lower inner case 3-2, and acceleration sensor 14 is connected with the input end of microcontroller 4 by signal line; Wherein, acceleration sensor 14 adopts Three-axis acceleration sensor, three-axis acceleration sensor is an electronic device that can measure the acceleration of an object during its motion. By double integrating the acceleration, the displacement of the plunger is obtained, and the cumulative calculation is carried out by the microcontroller 4. , to realize the first-level positioning of the plunger movement position; the acceleration sensor 14 adopts the cost-effective miniature capacitive three-axis accelerometer MMA7260 produced by Freescale, and the MMA7260Q7 is a low-cost single-chip three-axis high-sensitivity acceleration sensor, based on the surface micro Mechanical structure, integrated signal conditioning circuit, single-pole low-pass filter and temperature compensation part, and has 4 different sensitivity selection modes, small size, light weight, clear and concise identifier;

The secondary positioning device adopts a metal signal detection module, and the metal signal detection module includes an inductance-to-digital converter 15 and a search generator 16, and the inductance-to-digital converter 15 and the search generator 16 are installed in an inverted T-shaped ring structure On both sides of the supporting ring frame 17, the protective cover 18 provided on the upper end surface of the inductance-to-digital converter 15 and the search generator 16 is pressed against the positioning ring in the inner hole of the lower inner shell 3-2 through the oil-resistant rubber pad 19, and the The protective sleeve 18 provided on the lower end surface of the support ring frame 17 is placed on the upper end surface of the end cover 3-3 through the oil-resistant rubber pad 19, and the search generator 16 is connected with the inductance-to-digital converter 15, and the output terminal of the inductance-to-digital converter 15 is connected to the The input end of the microcontroller 4 is connected, and the two ends of the oil pipe 1 are connected together through the metal oil pipe collar 24, and the magnetic flux when the search generator 16 passes through the induction metal oil pipe collar 24 between the two oil pipes 1 The change information is fed back to the microcontroller 4 through the inductance-to-digital converter 15; specifically, the oil-resistant rubber pad 19 is made of latex material, and the search generator 16 is made of a flexible PCB coil;

In the above structure, in order to prevent the mechanical parts from wearing and tearing each other, the inductance-to-digital converter 15 and the search generator 16 in the metal signal detection module are equipped with four oil-resistant rubber pads 19 up and down, and the oil-resistant rubber pads 19 can act as pads. , sealing, and buffering; the retaining ring 3-5 plays the role of fixing and protecting the temperature-pressure integrated sensor 13; the inductance-to-digital converter 15 can complete the measurement of the inductance and impedance of the LC network, thereby realizing the inductance sensing technology; the inductance digital The search generator 16 externally connected to the converter 15 is made of a flexible PCB coil. An alternating current is applied to the coil, and an alternating magnetic field will be generated around the coil. At this time, if a metal object enters the magnetic field, it will generate Eddy current, according to the principle of electromagnetic induction, the changing electric field can generate a changing magnetic field, that is, the eddy current generated on the surface of the metal object can generate a secondary magnetic field; the metal oil pipe coupling 24 is located at the connection of the two oil pipes 1, which is a ring structure; when When the plunger main body 2 moves up and down the wellbore, due to the existence of the metal oil pipe collar 24 in the wellbore, the reluctance of the medium around the metal signal detection module changes, so that the magnetic field lines in the measuring coil are redistributed, and the magnetic flux density changes. The transformed magnetic flux value can be analyzed and processed to obtain the depth and position of the downhole plunger;

The metal signal detection module can detect metal couplings between oil pipes as a tool for collecting and obtaining information. When the plunger moves in the oil pipe, it will pass through countless oil pipe collars. Since the length of each oil pipe is known, it can be used as a positioning method. Specifically, each time the plunger passes through a metal oil pipe collar, according to The principle of electromagnetic induction, the metal oil pipe coupling will change the magnetic flux of the induction coil, the metal detector transmits this signal to the microcontroller, the microcontroller counts once, and records it through the internal memory of the microcontroller; the product of this signal and the length of the oil pipe As the quantitative judgment basis for the downhole position information of the plunger, the data is recovered after the gas lift plunger is periodically taken out.

The specific model of the inductance-to-digital converter 15 is LDC1614, and the LDC1614 is a 4-channel 28-bit inductance-to-digital converter 15 for inductive sensing solutions; it has multiple channels and supports remote sensing, and is configured through an I ² C interface. High performance and reliable inductive sensing at very low cost and power consumption.

The detection principle of LDC1614 inductance is to use the principle of electromagnetic induction. By adding an alternating current to the external PCB coil, an alternating magnetic field will be generated around the coil. When the plunger moves in the wellbore, the metal tubing collar 24 enters this alternating magnetic field. When the electromagnetic field is disturbed, a slight shift in the inductance can be observed through the induction coil; the LDC1614 can simultaneously measure the impedance and the resonance loss of the LC by adjusting the amplitude of the oscillator; the PCB coil has low cost, High sensitivity, flexible design, excellent consistency, etc., in order to ensure good sensitivity, the coil diameter is 14mm; since the 14mm diameter coil diameter is relatively large, in order to reduce costs, a double-layer PCB board is used here; at the same time, in order to maximize the coil Impedance, so use 4mil wire diameter and wire spacing, the coil inductance is about 20μH, use a 100pF capacitor as the resonant capacitor, the resonant frequency is 3.5MHz, and the coil resonant impedance is 14kΩ, which can meet the working conditions of LDC1000 and has a certain margin;

The three-stage positioning device includes several electronic tags 20 and FID-RC522 modules 21, and the outer walls of several oil pipes 1 are bonded and fixed with electronic tags 20, and the outer surfaces of the electronic tags 20 are pasted with wear-resistant and corrosion-resistant transparent The protective film, the depth of the oil pipe 1 in the wellbore, the thickness of the pipe wall and the diameter information are stored in the corresponding electronic tag 20, and the FID-RC522 module 21 is located above the primary positioning device and installed on the lower inner shell 3-2 Inside, the output end of the FID-RC522 module 21 is connected to the input end of the microcontroller 4 located above it, and the FID-RC522 module 21 is connected with the electronic label on the outer wall of the oil pipe 1 at the corresponding position during the movement of the plunger body 2 After 20 is wirelessly connected, the information on the depth position of the oil pipe stored on the electronic tag 20 is sent to the FID-RC522 module 21; wherein, the electronic tag 20 is a radio frequency tag, which is composed of a chip and a built-in antenna, and the chip stores the corresponding oil pipe. 1 The identification information waiting to be identified in the underground position and depth is the data carrier of the radio frequency identification system, and the built-in antenna is used to communicate with the radio frequency antenna of the RFID-RC522 module 21; the RFID-RC522 module 21 integrates the reader and the antenna, The reader is used to read or read/write the information of the electronic tag 20. Its main task is to send a read signal to the electronic tag 20, receive the response from the electronic tag 20, decode the object identification information of the electronic tag 20, and read the object The identification information and other relevant information on the label are transmitted to the microcontroller 4, so as to determine the plunger depth and running track according to the information of the tubing 1 sent by the electronic label 20 received by the plunger in the wellbore; the microcontroller uses STM32F103C8T6 chip, STM32F103C8T6 It is a 32-bit microcontroller based on the ARM Cortex-M core STM32 series, which has various advantages such as cheap price, powerful performance, and complete resources.

In the above structure, by setting the positioning module in the sealed inner shell 3 in the plunger main body 2, the position and height of the downhole fluid accumulation and the determination of the gas-lift plunger drainage and gas recovery movement trajectory are provided to provide data detection conditions and provide data detection conditions for each Judging whether the gas-lift plunger can reach the bottom of the well during the drainage and gas production stroke provides a basis for judgment;

The specific structure of the power supply device is as follows: the power supply device includes a battery pack 22 and an aviation quick connector 23, and the battery pack 22 and the aviation quick connector 23 are sequentially positioned and installed inside the battery protective cover 3-1 from top to bottom, and the battery Group 22 is electrically connected to the upper end of aviation quick connector 23, and the lower end of aviation quick connector 23 is electrically connected to microcontroller 4 below; It can be converted into electric energy to provide electric energy for the whole device; the pin (male contact) and socket (female contact) in the aviation quick connector 23 can be interchangeably assembled and used, and are resistant to pressure and corrosion;

This technical solution solves the problems that the traditional plunger cannot collect data such as downhole temperature, pressure, acceleration, fluid height, etc., cannot monitor and calculate the position and depth of the plunger in the wellbore, and cannot accurately evaluate the effect of the plunger drainage process. Environmental research provides data, simple structure, novel design, and reliable installation structure.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (9)

1. The electronic gas lift plunger is characterized in that: it comprises a plunger main body (2) which periodically reciprocates up and down in a wellbore formed by connecting several oil pipes (1) end to end, and the plunger main body (2) ) The lower end is threaded with a plug (5) made of stainless steel and the upper end is fixed with a fishing head (10), and the diversion hole (8) and diversion hole (8) and diversion The passages (6) communicate with each other, and the upper conical outer wall of the plunger main body (2) is formed with a plurality of circulation passages (7) communicating with the inner center circulation passage (9) of the plunger main body (2); the plunger The main body (2) is provided with a sealed inner shell (3), and the bottom well fluid is formed by the diversion hole (8), the diversion channel (6), the sealed inner shell (3) and the plunger main body (2). The gap between the hole walls, the central circulation channel (9) flows to the circulation channel (7); the sealed inner shell (3) is integrated with a power supply device made of non-magnetic and non-metallic materials, and has computing and storage functions A microcontroller (4), a data acquisition module for detecting downhole temperature and pressure information, a positioning module for detecting the position of downhole fluid accumulation, the temperature and pressure measuring head in the data acquisition module passes through the sealed inner shell (3 ) on the measuring hole (12) and the bypass hole (11) communicate with the effusion in the wellbore; the microcontroller (4) is electrically connected to the power supply device, and the signal output terminals of the data acquisition module and the positioning module are connected to the micro The input terminal of the controller (4) is connected. 2. The electronic gas lift plunger according to claim 1, characterized in that: the sealed inner shell (3) comprises a battery protection sleeve (3-1), a lower inner shell (3-2) and an end cap ( 3-3), the battery protection cover (3-1) is a hollow structure with the upper end sealed and the lower end open, the lower inner shell (3-2) is a stepped cover structure with upper and lower ends open, and the battery protection cover ( 3-1) The opening is positioned downwards on the lower inner shell (3-2), and the sealing groove (3-4) on the inner wall of the lower end of the battery protection cover (3-1) is provided with the lower inner shell (3-2). 2) The sealing ring in contact with the outer wall. A retaining ring (3-5) set on the lower inner shell (3-2) is provided under the battery protective cover (3-1). The retaining ring (3-5) The lower end face is against the positioning platform on the outer wall of the lower inner shell (3-2), and the upper end face of the retaining ring (3-5) is in contact with the lower end face of the battery protection sleeve (3-1), and the retaining ring (3-5) A measuring hole (12) corresponding to the position of the bypass hole (11) is formed on the outer wall, and the lower port of the lower inner shell (3-2) is sealed with an end cover (3-3). The device (4), the data acquisition module and the positioning module are all installed in the inner cavity formed by the battery protection cover (3-1) and the lower inner shell (3-2). 3. The electronic gas lift plunger according to claim 2, characterized in that: the data acquisition module includes a temperature and pressure integrated sensor (13), which is used to locate the lower inner part of the retaining ring (3-5). An installation groove is formed on the outer wall of the shell (3-2), and the temperature-pressure integrated sensor (13) of the temperature-pressure measuring head facing the stop ring (3-5) is embedded in the installation groove, and the temperature-pressure integrated sensor (13) Connect with the input end of microcontroller (4) through signal line. 4. The electronic gas lift plunger according to claim 2, wherein the positioning module includes a primary positioning device, a secondary positioning device and a tertiary positioning device. 5. The electronic gas lift plunger according to claim 4, characterized in that: the primary positioning device includes an acceleration sensor (14), and the acceleration sensor (14) is positioned and installed on the lower inner shell (3-2) Inside, and the acceleration sensor (14) is connected with the input terminal of the microcontroller (4) through the signal line. 6. The electronic gas lift plunger according to claim 4, characterized in that: the secondary positioning device adopts a metal signal detection module, and the metal signal detection module includes an inductance-to-digital converter (15) and a search generator ( 16), the inductance-to-digital converter (15) and the search generator (16) are installed on both sides of the support ring frame (17) of the inverted T-shaped ring structure, the inductance-to-digital converter (15) and the search generator (16) The protective sleeve (18) provided on the upper end surface is against the positioning ring in the inner hole of the lower inner shell (3-2) through the oil-resistant rubber pad (19), and the protective sleeve (18) provided on the lower end surface of the supporting ring frame (17) The sleeve (18) is pressed against the upper end face of the end cover (3-3) through an oil-resistant rubber pad (19), and the search generator (16) is connected to the inductance-to-digital converter (15), and the inductance-to-digital converter (15) The output end is connected with the input end of the micro-controller (4), and the first and last ends of the oil pipe (1) are fixedly connected as a whole through a metal oil pipe collar (24), and the search generator (16) passes through two oil pipes (1 ) between the induction metal oil pipe coupling (24) and the change information of the magnetic flux is fed back to the microcontroller (4) through the inductance-to-digital converter (15). 7. The electronic gas lift plunger according to claim 6, characterized in that: the oil-resistant rubber pad (19) is made of latex material, and the search generator (16) is made of a flexible PCB coil. 8. The electronic gas lift plunger according to claim 4, characterized in that: the three-stage positioning device includes several electronic tags (20) and FID-RC522 modules (21), and several oil pipes (1) Electronic labels (20) are bonded and fixed on the outer walls, and the outer surface of the electronic labels (20) is pasted with a wear-resistant and corrosion-resistant transparent protective film. Stored in the corresponding electronic label (20), the FID-RC522 module (21) is located above the primary positioning device and installed in the lower inner shell (3-2), the output of the FID-RC522 module (21) The end is connected with the input end of the microcontroller (4) located above it, and the FID-RC522 module (21) moves with the plunger main body (2) and the electronic label (20) on the outer wall of the oil pipe (1) at the corresponding position After the wireless connection, the information of the oil pipe depth position stored on the electronic tag (20) is sent to the FID-RC522 module (21). 9. The electronic gas lift plunger according to any one of claims 2-8, characterized in that: the power supply device comprises a battery pack (22) and an aviation quick connector (23), and the battery pack (22) and The aviation quick connector (23) is sequentially positioned and installed inside the battery protection case (3-1) from top to bottom, the battery pack (22) is electrically connected to the upper end of the aviation quick connector (23), and the aviation quick connector (23) The lower end is electrically connected with the microcontroller (4) below it.

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