RFID underground leaking stoppage equipment capable of preventing reader-writer from being overheated

Abstract

The invention discloses RFID underground leaking stoppage equipment capable of preventing a reader-writer from being overheated, belongs to the technical field of underground leaking stoppage equipment, and solves the problems that in the background technology, traditional underground leaking stoppage equipment needs to be additionally provided with a cooling system, so that the structure is complex, and the equipment operation efficiency is reduced. According to the RFID underground leaking stoppage equipment capable of preventing the reader-writer from being overheated, the RFID reader-writer can be cooled through existing drilling fluid, the used drilling fluid is introduced into the drilling fluid in an original drilling barrel, circulation of the drilling fluid is achieved, meanwhile, cooling of the drilling fluid on a drill bit and subsequent circulation are not affected, and through the mode, the RFID underground leaking stoppage equipment can prevent the reader-writer from being overheated. Under the condition that redundant cooling electric appliances are not added, circulating cooling of the reader-writer can be completed through continuous circulating drilling fluid, power consumption of an extra cooling system is avoided, the structure is simplified, the equipment operation efficiency is improved, meanwhile, the complexity of the underground environment is reduced, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of downhole plugging equipment, and particularly relates to an RFID downhole plugging equipment for preventing overheating of a reader-writer. Background Art

[0002] RFID (Radio Frequency Identification), also known as radio frequency identification, is an automatic identification technology integrating computer, radio, and communication technologies. It mainly consists of a transmitting identification system and an electronic tag. The transmitting identification system is responsible for sending and receiving signals, and the electronic tag serves as a beacon.

[0003] Currently, in the face of the downhole high-temperature environment, in the downhole plugging equipment equipped with RFID technology, the high temperature causes the RFID antenna and the reader-writer to be unable to adapt. The downhole high temperature is usually caused by geothermal gradient, drilling depth, geological activities, or chemical reactions. The temperature may be above 80°C to 200°C or more, depending on the depth and geological conditions. Ordinary RFID components usually have a temperature resistance between -25°C and 85°C, and industrial-grade ones may reach 125°C.

[0004] In a high-temperature environment, the chip and antenna materials in the electronic tag may fail due to high temperature. Circuit elements such as capacitors, resistors, and transistors in the reader-writer may age, and the expansion of the antenna material affects the signal. In addition, the connector and packaging materials may deform or melt, resulting in a decrease in sealing performance and further damage to internal components. If the problem that the reader-writer in the traditional technology cannot adapt to the downhole high-temperature environment cannot be solved, the frequent replacement of components, shutdown for maintenance affecting the drilling efficiency, as well as the additional expenses and safety risks of the maintenance team in the high-temperature environment will all increase the cost and affect the work progress.

[0005] Existing cooling devices (such as liquid cooling, air cooling, traditional heat pipes) are difficult to meet the extreme high-temperature requirements of RFID downhole plugging equipment due to low efficiency, poor reliability, and insufficient adaptability. Therefore, there is an urgent need to design an RFID downhole plugging equipment for preventing overheating of a reader-writer to solve the above problems. Summary of the Invention

[0006] Aiming at the problems existing in the above-mentioned prior art, that is, the RFID antenna and the reader-writer cannot adapt to the downhole high-temperature environment, resulting in frequent maintenance and economic burden, affecting the drilling efficiency and increasing the cost. Therefore, the present invention provides an RFID downhole plugging equipment for preventing overheating of a reader-writer. The equipment of the present invention combines the existing drilling fluid used to cool the reader-writer and the RFID antenna, improves the use efficiency of the drilling fluid, and at the same time avoids installing additional cooling devices (fans or other cooling electrical appliances), avoiding the problems of increased cost and later maintenance and replacement, and realizing the cooling requirements of the reader-writer and the RFID antenna during the working process of the downhole plugging equipment, as well as the control of economic costs.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] An RFID downhole plugging device for preventing the reader from overheating, characterized by comprising:

[0009] A drill pipe for accommodating and guiding drilling fluid;

[0010] A reader for signal interaction to achieve remote control and information transmission of the downhole RFID system;

[0011] An RFID antenna electrically connected to the reader for sensing tag data and transmitting it to the reader;

[0012] A cooling system respectively arranged on the reader and the RFID antenna and communicated with the drill pipe, and using the drilling fluid in the drill pipe to circulate and cool it.

[0013] Preferably, the cooling system comprises:

[0014] A first cooling pipe, one end of which is communicated with the inner cavity of the drill pipe and the other end is communicated with a first heat exchange fin;

[0015] The first heat exchange fin is arranged in contact with the reader;

[0016] A first water outlet pipe, one end of which is communicated with the first heat exchange fin and the other end is communicated with the drill pipe.

[0017] Preferably, fins are arranged on the first heat exchange fin, and the fins improve the heat exchange efficiency of the first heat exchange fin through the expanded heat transfer area.

[0018] Preferably, the cooling system further comprises a spoiler, and a filter screen is arranged on the spoiler. The spoiler is inclined between the first cooling pipe and the drill pipe for guiding the drilling fluid in the drill pipe into the first cooling pipe.

[0019] Preferably, the inclination angle of the spoiler is 45°.

[0020] Preferably, the inclination direction of the spoiler is opposite to the flow direction of the mud inside the drill pipe.

[0021] Preferably, the RFID downhole plugging device further comprises a drilling fluid control system, and the drilling fluid control system comprises:

[0022] A PLC control board electrically connected to the reader for real-time monitoring and remote control of the downhole environment;

[0023] A side-through valve electrically connected to the PLC control board for adjusting the flow direction of the drilling fluid;

[0024] A vertical valve, electrically connected to a PLC control board, is used to optimize fluid circulation.

[0025] Preferably, the side bypass valve includes:

[0026] A hydraulic cylinder barrel, with a telescopic rod connected to the end of the hydraulic cylinder barrel;

[0027] A valve plate, arranged at the end of the telescopic rod and used in cooperation with a groove formed on the wall of the drill pipe.

[0028] Preferably, the usage process of the RFID downhole plugging device for preventing the reader-writer from overheating is as follows: After the drilling fluid in the drill pipe passes through the spoiler plate, a part of the drilling fluid enters the first cooling pipe, and then enters the first heat exchange fin through the first cooling pipe. After the drilling fluid in the first heat exchange fin absorbs the temperature of the reader-writer, the cooled drilling fluid returns to the inside of the drill pipe through the first water outlet pipe, mixes with other drilling fluids, and flows along the inside of the drill pipe to the drill bit for cooling the drill bit. The drilling fluid after cooling the drill bit finally returns to the ground and forms a cycle underground;

[0029] At the same time, after the drilling fluid in the drill pipe passes through another spoiler plate, a part of the drilling fluid enters the second cooling pipe, and then enters the second heat exchange fin through the second cooling pipe. After the drilling fluid in the second heat exchange fin absorbs the temperature of the RFID antenna, the cooled drilling fluid returns to the inside of the drill pipe through the second water outlet pipe, mixes with other drilling fluids, and flows along the inside of the drill pipe to the drill bit for cooling the drill bit. The drilling fluid after cooling the drill bit finally returns to the ground and forms a cycle underground.

[0030] The beneficial effects of the present invention are as follows: The present invention discloses a downhole plugging device for preventing the RFID reader-writer from overheating. Compared with the prior art, the improvements of the present invention are as follows:

[0031] During the process of the drill pipe drilling and descending, for every 100 meters of downward drilling, the temperature will increase by 3 - 4 °C. Therefore, it is necessary to pour drilling fluid at the interface of the drill pipe to cool the drill bit and prevent the drill bit from being damaged due to overheating; On this basis, the present invention designs a cooling system based on the existing drilling fluid in the drill pipe and the drilling fluid circulation. This cooling system facilitates the existing drilling fluid to cool the RFID reader-writer, and introduces the used drilling fluid into the original drilling fluid in the drill pipe to achieve its circulation, without affecting the cooling of the drill bit by the drilling fluid and the subsequent circulation. In this way, without adding redundant cooling electrical appliances, the continuously circulating drilling fluid can be used to complete the circulating cooling of the reader-writer, avoiding the power consumption of the additional cooling system, simplifying the structure, improving the operation efficiency of the equipment, and at the same time reducing the complexity of the downhole environment, which helps to reduce the maintenance cost. Description of the Drawings

[0032] Figure 1Internal schematic diagram of the RFID underground plugging device for preventing the reader from overheating according to the present invention;

[0033] Figure 2 Structural schematic diagram of the cooling system according to the present invention;

[0034] Figure 3 Structural schematic diagram of the spoiler according to the present invention;

[0035] Figure 4 Structural schematic diagram of the fin according to the present invention;

[0036] Wherein: 1 - reader; 2 - flow baffle; 3 - filter screen; 4 - second filter screen; 5 - second spoiler; 6 - second cooling pipe; 7 - second heat exchange fin; 8 - RFID antenna; 9 - first heat exchange fin; 10 - second water outlet pipe; 11 - PLC control board; 12 - hydraulic cylinder barrel; 13 - telescopic rod; 14 - valve plate; 15 - groove; 16 - vertical valve; 17 - first cooling pipe; 30 - fin. Detailed implementation manners

[0037] In order to enable those of ordinary skill in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0038] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] Embodiment:

[0041] Refer to the attached Figures 1-4An RFID downhole plugging device for preventing the reader-writer from overheating as shown. The cooling idea of the downhole plugging device in the embodiment for the reader-writer 1 is to combine the drilling fluid to take away the heat of the reader-writer 1, so as to realize the cooling of the reader-writer 1, and divert the used drilling fluid to make it circulate along the flow track of the drilling fluid to ensure the cooling effect of the drilling fluid on the reader-writer 1.

[0042] The specific way to cool the reader-writer 1 by combining the drilling fluid is as follows: guide the drilling fluid to the reader-writer 1, and realize heat exchange through the first heat exchange fin 9 that is closely attached to the reader-writer 1. In this way, it is possible to avoid installing an additional fan or other cooling electrical appliances in the drill pipe to cool the reader-writer 1, improve the utilization efficiency of the drilling fluid, and at the same time reduce the failure problems of the reader-writer caused by overheating underground.

[0043] Specifically, the RFID downhole plugging device for preventing the reader-writer from overheating in this embodiment includes:

[0044] Drill pipe: used to accommodate and guide the drilling fluid and realize the cooling of the RFID reader-writer. Specifically, Function 1. Divert the drilling fluid: A cooling pipe (the first cooling pipe 17) is connected inside the drill pipe to enable the drilling fluid to enter and flow through the cooling system. Function 2. Cool the reader-writer 1. Through the first cooling pipe 17, the drilling fluid enters the first heat exchange fin 9 and exchanges heat with the reader-writer 1, thereby reducing its temperature and preventing damage caused by high underground temperature. Function 3. Maintain the drilling operation environment. The drill pipe ensures the circulating flow of the drilling fluid, helps in overall temperature control, and improves the heat resistance performance of the drilling equipment.

[0045] The first cooling pipe 17 is connected to the first heat exchange fin 9 on the drill pipe. The water outlet of the first heat exchange fin 9 is connected to a first water outlet pipe 18, and the other end of the first water outlet pipe 18 is connected to the inside of the drill pipe. The first heat exchange fin 9 is closely attached to the reader-writer 1 and is used to exchange heat with the reader-writer 1 to achieve the cooling purpose of the reader-writer 1.

[0046] During use, when the drilling fluid in the drill pipe passes through the spoiler 2, a part of the drilling fluid enters the first cooling pipe 17, and then enters the first heat exchange fin 9 from the first cooling pipe 17. The temperature of the first heat exchange fin 9 is much lower than that of the reader-writer 1. According to the principle that heat transfers from an object with a higher temperature to an object with a lower temperature, after the drilling fluid in the first heat exchange fin 9 absorbs the temperature of the reader-writer 1, the cooled drilling fluid returns to the inside of the drill pipe through the first water outlet pipe 18, mixes with other drilling fluid, and flows along the inside of the drill pipe to the drill bit to cool the drill bit. The drilling fluid after cooling the drill bit finally returns to the ground and forms a cycle underground.

[0047] Among them, the spoiler 2 is used to guide the drilling fluid in the drill pipe so that it can smoothly enter the first cooling pipe 17, and then cool the reader 1; specifically, it is arranged at the connection between the first cooling pipe 17 and the inner wall of the drill pipe, and is inclined. The inclination direction of the spoiler 2 is opposite to the flow direction of the mud inside the drill pipe, which is convenient for reducing the sedimentation time of mud solid particles. In order to ensure that the mud solid particles can slide down smoothly and be discharged smoothly, in this embodiment, the spoiler 2 is inclined upward by 35°-45° on the inner wall of the drill pipe; filter screens 3 are arranged at the end and side of the spoiler 2, and the function of the filter screen 3 is to prevent RFID tags from flowing into the first cooling pipe 17 and causing blockage faults;

[0048] The first heat exchange fin 9 adopts an efficient heat exchange structure and is closely attached to the reader 1 to enhance the heat conduction efficiency. Its fixing method is threaded connection, and thermal conductive silicone grease is coated on the contact surface to optimize the heat exchange effect. The threaded connection of the first heat exchange fin 9 can achieve detachable maintenance, ensure stable operation in high-temperature environments, and improve the durability and maintainability of the equipment;

[0049] To further optimize the structure of the first heat exchange fin 9 and improve its heat exchange effect, fins 30 are added to the inner cavity wall of the first heat exchange fin 9 to work together to achieve efficient heat transfer. The fins 30 convectively exchange heat through their extended heat transfer area.

[0050] Reader 1: The reader 1 is fixedly connected to the first heat exchange fin 9. The reader 1 establishes a data communication link with the RFID antenna 8 through radio frequency signals and is electrically connected to the PLC control board 11 in the drilling fluid control system for signal interaction to achieve remote control and information transmission of the downhole RFID system. The RFID antenna 8 is responsible for sensing tag data and transmitting it to the reader 1, and the reader 1 then uploads the data to the PLC control board 11 through the signal processing module to achieve real-time monitoring and remote regulation of the downhole environment;

[0051] The PLC control board 11 is connected to a side-pass valve and a vertical valve 16. The PLC control board 11 is mainly used to automatically control the downhole cooling system, optimize the drilling fluid flow by managing the side-pass valve and the vertical valve 16, and improve the cooling efficiency. Its core functions include: monitoring environmental parameters, collecting data such as temperature and pressure in real time; calculating and making decisions, adjusting the drilling fluid flow direction according to temperature changes; executing control, controlling the movement of the telescopic rod 13 by driving the hydraulic cylinder barrel 12 to open or close the relevant side-pass valve and vertical valve 16;

[0052] The side-pass valve opens and closes the side-pass pipeline through a hydraulic cylinder structure. Specifically, the side-pass valve includes a hydraulic cylinder barrel 12 and a valve plate 14. Among them, the hydraulic cylinder barrel 12 is connected to the above-mentioned PLC control board 11, and a telescopic rod 13 is connected to the end of the hydraulic cylinder barrel 12. When receiving the opening signal from the PLC control board 11, the hydraulic cylinder barrel 12 controls the telescopic rod 13 to lift upward and open the side-pass pipeline. When receiving the closing signal, it controls the telescopic rod 13 to close downward. Among them, two hydraulic cylinder barrels 12 and telescopic rods 13 are provided and arranged on both sides of the drill pipe.

[0053] Furthermore, a valve plate 14 is provided at the end of the control telescopic rod 13. To further improve the sealing performance between the valve plate 14 and the side-pass valve, a groove 15 is provided on the inner wall of the drill pipe. The structure of the groove 15 is matched with the valve plate 14, and a sealing gasket is fixedly arranged inside the groove 15. The material of the sealing gasket is preferably nitrile rubber in this embodiment. In this way, the sealing performance between the valve plate 14 and the groove 15 can be further enhanced.

[0054] Among them, the function of the side-pass valve is to adjust the flow direction of the drilling fluid. When the temperature of the reader-writer 1 is too high, the inflow of the drilling fluid is increased to improve the heat exchange efficiency. At the same time, the pressure can be adjusted to adapt to the changes in the downhole environment and ensure the stable flow of the fluid. The vertical valve 16 is used to optimize the fluid circulation, reduce the consumption of the drilling fluid when the cooling demand decreases, prevent waste, and close in time when the temperature or pressure exceeds the limit to ensure the safety of the equipment. The PLC control board 11 realizes the intelligent adjustment of the drilling fluid by precisely controlling the valve state, improves the cooling effect, optimizes the operation of the equipment, and reduces the energy consumption and maintenance cost.

[0055] In this embodiment, the drilling fluid flowing in from the drill pipe interface is used as the coolant. This drilling fluid can be sprayed out from the drill bit at the end of the drill pipe to complete the cycle. After the drilling fluid enters from the drill pipe interface, part of it flows into the first cooling pipe 17 and exchanges heat with the reader-writer 1 in the first heat exchange fin 9. After absorbing its heat, it returns to the inside of the drill pipe through the first water outlet pipe 18. The cooled drilling fluid finally flows to the drill bit and is still involved in the downhole operation after being sprayed out. Therefore, there is no need to cool the drilling fluid that has completed the heat exchange. This design effectively utilizes the natural circulation of the drilling fluid, avoids the power consumption of an additional cooling system, simplifies the structure, improves the operation efficiency of the equipment, and at the same time reduces the complexity of the downhole environment, which helps to reduce the maintenance cost.

[0056] Similarly, a cooling device is also provided on the RFID antenna 8. Specifically, a second heat exchange fin 7 is fixedly connected to the side of the RFID antenna 8. The water inlet of the second heat exchange fin 7 is communicated with a second cooling pipe 6, and the second cooling pipe 6 is also communicated with the drill pipe through another spoiler 2. The water outlet of the second heat exchange fin 7 is communicated with a second water outlet pipe 10, and the second water outlet pipe 10 is communicated with the drill pipe.

[0057] Similarly, to further optimize the structure of the second heat exchange fin 7 and improve its heat exchange effect, fins 30 are added on the basis of the second heat exchange fin 7 to work together to achieve efficient heat transfer. The fins 30 perform convective heat exchange through their extended heat transfer area.

[0058] The cooling principle of the RFID antenna 8 is similar to that of the reader / writer 1. Both perform heat exchange with the drilling fluid through heat exchange fins. The process is as follows: After the drilling fluid in the drill pipe passes through another turbulator 2, a part of the drilling fluid enters the second cooling pipe 6, and then enters the second heat exchange fin 7 from the second cooling pipe 6. After the drilling fluid in the second heat exchange fin 7 absorbs the temperature of the RFID antenna 8, the cooled drilling fluid returns to the inside of the drill pipe through the second water outlet pipe 10, mixes with other drilling fluids, and flows along the inside of the drill pipe to the drill bit to cool the drill bit. The drilling fluid after cooling the drill bit finally returns to the ground and forms a cycle underground.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An RFID underground leakage plugging device for preventing the reader-writer from overheating, characterized in that, Comprising: A drill pipe for accommodating and guiding drilling fluid; A reader / writer (1) for signal interaction to achieve remote control and information transmission of the downhole RFID system; An RFID antenna (8) electrically connected to the reader / writer (1) for sensing tag data and transmitting it to the reader / writer (1); A cooling system respectively arranged on the reader / writer (1) and the RFID antenna (8) and communicating with the drill pipe, using the drilling fluid in the drill pipe to circulate and cool it.

2. The RFID underground leakage plugging device for preventing the reader-writer from overheating according to claim 1, wherein The cooling system includes: A first cooling pipe (17) with one end communicating with the inner cavity of the drill pipe and the other end communicating with a first heat exchange fin (9); The first heat exchange fin (9) is arranged in contact with the reader / writer (1); A first water outlet pipe (18) with one end communicating with the first heat exchange fin (9) and the other end communicating with the drill pipe.

3. The RFID underground plugging device for preventing overheating of the reader-writer according to claim 2, characterized in that, The inner cavity of the first heat exchange fin (9) is provided with fins (30), and the fins (30) improve the heat exchange efficiency of the first heat exchange fin (9) through its extended heat transfer area.

4. The RFID underground leakage plugging device for preventing the reader-writer from overheating according to claim 2, wherein, The cooling system further includes a spoiler (2) with a filter screen (3) arranged thereon. The spoiler (2) is inclined between the first cooling pipe (17) and the drill pipe for guiding the drilling fluid in the drill pipe into the first cooling pipe (17).

5. The RFID underground leakage plugging device for preventing the reader from overheating according to claim 4, characterized in that, The inclination angle of the spoiler (2) is 45°.

6. The RFID underground plugging device for preventing the reader-writer from overheating according to claim 4, wherein The inclination direction of the spoiler (2) is opposite to the flow direction of the mud inside the drill pipe.

7. The RFID underground leakage plugging device for preventing the reader / writer from overheating according to claim 1, characterized in that The RFID downhole plugging device further includes a drilling fluid control system, and the drilling fluid control system includes: A PLC control board (11) electrically connected to the reader / writer (1) for real-time monitoring and remote control of the downhole environment; A side-pass valve electrically connected to the PLC control board (11) for adjusting the flow direction of the drilling fluid; A vertical valve (16) electrically connected to the PLC control board (11) for optimizing fluid circulation.

8. The RFID underground leakage plugging device for preventing the reader-writer from overheating according to claim 7, characterized in that, The side-pass valve includes: A hydraulic cylinder barrel (12) with a telescopic rod (13) connected to the end of the hydraulic cylinder barrel (12), A valve plate (14) arranged at the end of the telescopic rod (13) and cooperating with a groove (15) formed on the wall of the drill pipe.

9. The RFID underground plugging device for preventing the reader-writer from overheating according to claim 1, wherein The usage process of the RFID downhole plugging device for preventing the reader / writer from overheating is as follows: After the drilling fluid in the drill pipe passes through the spoiler (2), a part of the drilling fluid enters the first cooling pipe (17), then enters the first heat exchange fin (9) through the first cooling pipe (17). After the drilling fluid in the first heat exchange fin (9) absorbs the temperature of the reader / writer (1), the cooled drilling fluid returns to the inside of the drill pipe through the first water outlet pipe (18), mixes with other drilling fluid, and flows along the inside of the drill pipe to the drill bit for cooling the drill bit. The drilling fluid after cooling the drill bit finally returns to the ground and forms a cycle underground; Meanwhile, after the drilling fluid in the drill pipe passes through another spoiler (2), a part of the drilling fluid enters the second cooling pipe (6), and then enters the second heat exchange fin (7) through the second cooling pipe (6). After the drilling fluid in the second heat exchange fin (7) absorbs the temperature of the RFID antenna (8), the cooled drilling fluid returns to the inside of the drill pipe through the second water outlet pipe (10), mixes with other drilling fluids, and flows along the inside of the drill pipe to the drill bit to cool the drill bit. The drilling fluid after cooling the drill bit finally returns to the ground and forms a cycle underground.

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