RFID signal anti-interference underground leaking stoppage equipment

Abstract

The invention discloses RFID signal anti-interference underground plugging equipment which solves the problems that in the prior art, signals are interfered by a metal sleeve, and signals sent by an RFID tag are influenced by reflection in mud, and comprises a U-shaped pipe used for inputting and recycling the RFID tag; the RFID antenna is of an annular structure, the RFID antenna is arranged outside the U-shaped pipe in a sleeving mode, a window is formed in the U-shaped pipe, the inner wall of the RFID antenna corresponds to the position of the window, the RFID antenna is in signal connection with a reader-writer, and the reader-writer is in signal connection with a PLC control panel; the side through valve is used for opening and closing the side through opening; the vertical valve is used for controlling the vertical port; and the side valve and the vertical valve are both connected with the PLC control panel. The technical effect that signals of the RFID tag are prevented from being interfered by the metal sleeve and mud is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling plugging equipment, and in particular relates to an underground plugging equipment with RFID signal anti-interference. Background Art

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

[0003] At present, in downhole plugging equipment equipped with RFID wireless radio frequency technology, there are still problems such as signals being interfered by metal sleeves and signals emitted by RFID tags being reflected in mud, resulting in the problem of being unable to ensure that the downhole valve can be controlled quickly and accurately each time an RFID tag is introduced. Summary of the invention

[0004] In view of the problems in the prior art that signals are interfered by metal sleeves and signals emitted by RFID tags are affected by reflection in mud, the present invention provides an underground leak plugging device with RFID signal anti-interference, the purpose of which is to prevent the signals of RFID tags from being interfered by metal sleeves and mud.

[0005] The technical solution adopted by the present invention is as follows:

[0006] An underground leak plugging device with RFID signal anti-interference, comprising:

[0007] U-shaped tube: used to put in and recycle RFID tags;

[0008] RFID antenna: The RFID antenna is a ring structure, and the RFID antenna is sleeved on the outside of the U-shaped tube. The U-shaped tube is provided with a window, and the inner wall of the RFID antenna corresponds to the position of the window. The RFID antenna signal is connected to a reader / writer, and the reader / writer signal is connected to a PLC control board;

[0009] Side-way valve: used to open and close the side-way port;

[0010] Vertical valve: used to control vertical openings;

[0011] The side-pass valve and the vertical valve are both connected to the PLC control panel.

[0012] By adopting the above scheme, when controlling the underground plugging tool, the RFID tag can be dropped from one end of the U-shaped tube. During the falling process of the U-shaped tube, it can pass through the RFID antenna installed on the outside of the U-shaped tube, and through the electromagnetic wave induction confirmation between the RFID antenna and the RFID tag, the control information carried in the RFID tag can be identified. The RFID reader can identify the control information and convert the information into an electrical signal and transmit it to the PLC control board. The PLC control board sends corresponding control signals to each valve in the equipment to complete the opening and closing of the side passage and the vertical passage. In the above structure, the U-shaped tube replaces the traditional technology of directly dropping the RFID tag into the mud pipeline, thereby avoiding the influence of the metal sleeve on the RFID tag signal, and the technical problems of unstable wireless radio frequency signals and inaccurate and rapid recognition caused by the weakening of the signal emitted by the RFID tag in the mud, thereby improving the recognition efficiency and accuracy of the RFID signal underground.

[0013] The RFID antenna comprises a substrate, which is an annular structure. An RFID coil is fixedly arranged on the inner wall of the substrate, and the RFID coil corresponds to the window position.

[0014] By adopting the above solution, the annular structure substrate replaces part of the tube wall of the U-shaped tube, which can eliminate obstacles between the RFID coil and the RFID tag and improve the recognition speed and efficiency of the RFID signal.

[0015] There are several RFID antennas.

[0016] The above solution can provide multiple layers of insurance for RFID signal recognition, thereby preventing the reader from being unable to read the signal of the RFID tag due to failure of one of the RFID antennas. This structure can reduce the maintenance rate of the equipment.

[0017] The outlet of the U-shaped tube is fixedly connected to a storage box, and the air outlet of the storage box is fixedly connected to a negative pressure fan.

[0018] By adopting the above scheme, after the RFID tag completes the identification work, it can be recovered into the storage box through the outlet of the U-shaped tube. Specifically, the negative pressure fan can form negative pressure in the U-shaped tube, so that the RFID tag accelerates its fall in the U-shaped tube, and is pulled out and recovered from the well after the identification work is completed.

[0019] A filter is fixedly arranged inside the storage box.

[0020] The above solution can prevent the RFID from being accidentally sucked into the negative pressure fan.

[0021] The end of the side-pass valve is fixedly connected with a hydraulic pipe, and the hydraulic pipe is connected to the PLC control board.

[0022] The U-shaped tube is made of non-metallic material.

[0023] By adopting the above solution, it is possible to prevent metal from affecting the signal of the RFID tag.

[0024] The RFID antenna is a printed RFID antenna.

[0025] It also includes a first cavity and a second cavity, the RFID antenna is arranged in the first cavity, and the bending part of the U-shaped tube connects the first cavity and the second cavity.

[0026] The diameter of the U-shaped tube is 5-7 cm.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] 1. When controlling the underground plugging tool, the RFID tag can be dropped from one end of the U-shaped tube. During the falling process of the U-shaped tube, it can pass through the RFID antenna set on the outside of the U-shaped tube. Through the electromagnetic wave induction confirmation between the RFID antenna and the RFID tag, the control information carried in the RFID tag can be identified. The RFID reader can identify the control information and convert the information into an electrical signal and transmit it to the PLC control board. The PLC control board sends corresponding control signals to each valve in the equipment to complete the opening and closing of the side passage and the vertical passage. In the above structure, the U-shaped tube replaces the traditional technology of directly dropping the RFID tag into the mud pipeline, avoiding the influence of the metal sleeve on the RFID tag signal, and the technical problems of unstable wireless radio frequency signals and inaccurate and rapid recognition caused by the weakening of the signal emitted by the RFID tag in the mud, thereby improving the recognition efficiency and accuracy of the RFID signal underground.

[0029] 2. By replacing part of the wall of the U-shaped tube with a ring-shaped matrix, obstacles between the RFID coil and the RFID tag can be eliminated, thereby improving the recognition speed and efficiency of the RFID signal.

[0030] 3. It can provide multiple layers of insurance for RFID signal recognition to prevent the reader from being unable to read the signal of the RFID tag due to the failure of one of the RFID antennas. Through this structure, the maintenance rate of the equipment can be reduced.

[0031] 4. After the RFID tag completes the identification work, it can be recovered into the storage box through the outlet of the U-shaped tube. Specifically, the negative pressure fan can form a negative pressure in the U-shaped tube, so that the RFID tag is accelerated to fall in the U-shaped tube, and is pulled out and recovered from the well after the identification work is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0033] Figure 1 It is a schematic diagram of the internal structure of an embodiment of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure of an RFID tag according to an embodiment of the present invention;

[0035] Figure 3 It is a schematic diagram of the RFID tag structure of an embodiment of the present invention.

[0036] Figure markings: 1-first cavity; 2-second cavity; 3-U-shaped tube; 4-base; 5-reader / writer; 6-PLC control board; 7-hydraulic controller; 8-hydraulic pipe; 9-side passage valve; 10-side passage opening; 11-storage box; 12-filter; 13-negative pressure fan; 14-RFID coil; 15-RFID tag; 16-vertical valve. DETAILED DESCRIPTION

[0037] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0038] Combine the following Figure 1-Figure 3 The present invention is described in detail.

[0039] Embodiment 1:

[0040] In this embodiment, a downhole plugging device is disclosed that can avoid the influence of mud and metal sleeve on RFID tag signal. It mainly opens a separate pipeline in the drill pipe as a sliding channel for the RFID tag. Only the RFID tag moves in the channel, which can avoid the RFID tag signal being absorbed by the mud during the mud falling process, affecting the radiation range of the RFID signal. At the same time, by arranging an RFID antenna on the channel, the RFID antenna can directly receive the signal of the RFID tag, and the electromagnetic wave emitted by the RFID antenna is not affected by the metal sleeve. Its specific structure is as follows: Figure 2-Figure 3 The above equipment specifically includes:

[0041] U-shaped tube 3: used for inputting and retrieving RFID tags;

[0042] RFID antenna: The RFID antenna is a ring structure, and the RFID antenna is sleeved on the outside of the U-shaped tube 3. The outlet of the U-shaped tube 3 is connected to a negative pressure device. A window is provided on the U-shaped tube 3, and the inner wall of the RFID antenna corresponds to the position of the window. The RFID antenna signal is connected to a reader 5, and the reader 5 signal is connected to a PLC control board 6.

[0043] Side-way valve 9: used to open and close the side-way port;

[0044] Vertical valve 16: used to control the vertical opening;

[0045] The side-pass valve 9 and the vertical valve 16 are both connected to the PLC control board 6 .

[0046] like Figure 1 As shown, the U-shaped tube 3 includes a first tube body, a second tube body and a bending portion for connecting the first tube body and the second tube body, wherein the first tube body is arranged in the first cavity 1, and the second tube body is arranged in the second tube body 2, one end of the bending portion is connected to the first tube body, and the other end is connected to the second tube body 2, and the two ends of the bending portion are respectively in the first cavity 1 and the second cavity 2. In this embodiment, the RFID tag 15 performs a falling motion in the first tube body, and the RFID tag 15 performs an ascending motion in the second tube body, wherein the falling motion is performed by the negative pressure action of the negative pressure device and the natural gravity, and the ascending motion sucks the RFID tag out of the bottom of the U-shaped tube 3 through the negative pressure device.

[0047] Furthermore, a window is provided in the middle of the U-shaped tube 3, and the window is filled with an RFID antenna. The specific structure is as follows: Figure 3 As shown, through this method, the RFID antenna can be directly placed in the same space as the RFID tag, avoiding the signal blocking by the U-shaped tube 3 and the absorption of the RFID tag signal by the mud, and can improve the transmission speed and accuracy of the opening and closing control instructions of the measuring port.

[0048] The RFID antenna is a ring-shaped structure, which specifically includes a base 4, the base 4 is a ring-shaped structure, and an RFID coil 14 is fixedly arranged on the inner wall of the base 4, and the RFID coil 14 corresponds to the window position. Figure 2 As shown, the substrate 4 is a thick ring structure, and the RFID coil 14 is attached to the inner circle. When the RFID tag 15 enters the radiation range of the RFID antenna, the information interaction can be completed and the RFID tag 15 continues to fall through the center of the RFID antenna. The schematic diagram of the RFID antenna is shown in FIG. Figure 2 .

[0049] In order to ensure that the RFID tag 15 and the RFID antenna can complete the interaction, several RFID antennas are provided in this embodiment.

[0050] After the RFI tag completes the signal interaction, it can be sucked out of the drill tube by the negative pressure fan 13. A storage box 11 is fixedly connected to the outlet of the U-shaped tube 3, and the air outlet of the storage box 11 is fixedly connected to the negative pressure fan 13. Through the negative pressure effect of the negative pressure fan 13, the RFID tag 15 moves in a U-shaped trajectory in the U-shaped tube and is finally sucked into the storage box 11, wherein a filter screen 12 is fixedly arranged inside the storage box 11, and the filter screen 12 can prevent the RFID tag 15 from being sucked into the negative pressure fan 13, thereby ensuring that all RFID tags are sucked into the storage box 11.

[0051] The end of the side-pass valve 9 is fixedly connected to a hydraulic pipe 8, and the hydraulic pipe 8 is connected to the PLC control board 6. In this embodiment, the side-pass valve 9 is controlled by the hydraulic pipe 8, and the opening and closing of the side-pass opening 10 are controlled, wherein the hydraulic rod 8 and the Figure 1 The cylinder 7 is connected, and its specific structure is as follows Figure 1 shown.

[0052] The material of the U-shaped tube 3 is non-metallic material. Through this solution, it is possible to avoid the absorption of radio frequency signals by metal, and further increase the range of electromagnetic induction of the RFID tag and the RFID antenna.

[0053] The RFID antenna is a printed RFID antenna, which is a flexible structure and can be attached to the inner wall of the substrate 4.

[0054] The device further comprises a first cavity 1 and a second cavity 2 , wherein the RFID antenna is arranged in the first cavity 1 , and the bending part of the U-shaped tube 3 connects the first cavity 1 and the second cavity 2 .

[0055] The diameter of the U-shaped tube 3 is 5-7 cm.

[0056] The above embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. An underground leak plugging device with RFID signal anti-interference, characterized in that: include: U-shaped tube (3): used for inserting and retrieving RFID tags; RFID antenna: the RFID antenna is a ring-shaped structure, the RFID antenna is sleeved on the outside of the U-shaped tube (3), and the outlet of the U-shaped tube (3) is connected to a negative pressure device; The U-shaped tube (3) is provided with a window, the inner wall of the RFID antenna corresponds to the position of the window, the RFID antenna signal is connected to a reader / writer (5), and the reader / writer (5) signal is connected to a PLC control board (6); Side-way valve (9): used to open and close the side-way port; Vertical valve (16): used to control the vertical opening; The side-pass valve (9) and the vertical valve (16) are both connected to the PLC control panel (6).

2. The downhole plugging equipment with RFID signal anti-interference according to claim 1 is characterized in that: The RFID antenna comprises a base body (4), the base body (4) is a ring-shaped structure, an RFID coil (14) is fixedly arranged on the inner wall of the base body (4), and the RFID coil (14) corresponds to the window opening position.

3. The downhole plugging equipment with RFUD signal anti-interference according to claim 1, characterized in that: There are several RFID antennas.

4. The downhole plugging equipment with RFID signal anti-interference according to claim 1 is characterized in that: The outlet of the U-shaped tube (3) is fixedly connected to a storage box (11), and the air outlet of the storage box (11) is fixedly connected to a negative pressure fan (13).

5. The downhole plugging equipment with RFID signal anti-interference according to claim 4 is characterized in that: A filter screen (12) is fixedly arranged inside the storage box (11).

6. The downhole plugging equipment with RFID signal anti-interference according to claim 1 is characterized in that: The end of the side-pass valve (9) is fixedly connected to a hydraulic pipe (8), and the hydraulic pipe (8) is connected to the PLC control board (6).

7. The downhole plugging equipment with RFID signal anti-interference according to claim 1 is characterized in that: The material of the U-shaped tube (3) is a non-metallic material.

8. The downhole plugging equipment with RFID signal anti-interference according to claim 1 is characterized in that: The RFID antenna is a printed RFID antenna.

9. The downhole plugging equipment with RFID signal anti-interference according to claim 1, characterized in that: It also comprises a first cavity (1) and a second cavity (2), the RFID antenna being arranged in the first cavity (1), and the bending part of the U-shaped tube (3) connecting the first cavity (1) and the second cavity (2).

10. The downhole plugging equipment with RFUD signal anti-interference according to claim 1, characterized in that: The diameter of the U-shaped tube (3) is 5-7 cm.

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