Well drilling top drive real-time grouting device

Abstract

The invention discloses a drilling top drive real-time grouting device, and relates to the technical field of oil and gas drilling. Comprising a body pipe and a hose with the bottom end being an inclined face, a conical internal thread upper connector used for being connected with a protection connector of a top drive is integrally arranged at the top end of the body pipe, an external hexagonal structure is integrally arranged in the middle of the outer side of the body pipe, and external threads are formed in the bottom of the outer side of the body pipe. By arranging a series of structures, stable threaded butt joint of the hose and the body pipe is facilitated, elastic tightening and looseness prevention are integrally conducted on the threaded engagement position, the risk of looseness of the threaded screwing position during use is reduced, and the connection stability during use is improved; and the stable tightening sealing communication effect can be integrally and directly formed at the bottom end of the body pipe during screwing, the phenomenon that slurry enters the inner threaded sleeve to be blocked, left and solidified into threads on the inner side of the inner threaded sleeve is avoided, and therefore the phenomenon that the hose is difficult to replace subsequently due to the fact that the slurry is left and solidified at the positions of the threads to block the anti-disengaging ring is avoided.

Description

Technical Field

[0001] This invention relates to the field of oil and gas drilling technology, specifically to a real-time grouting device for top drive drilling. Background Technology

[0002] Currently, the oilfield uses top-drive drilling rigs, and grouting is carried out through surface grouting pumps and corresponding pipelines. When grouting is needed, the casing lowering operation is stopped, the near end of the surface grouting pipeline is placed into the casing, and the surface injection pump is turned on for grouting. This requires stopping the casing lowering operation for grouting, which increases the casing lowering operation time.

[0003] According to the novelty search report, application number 202310142551.0 discloses a real-time grouting device for drilling top drive, including: a main body pipe, an intermediate joint, and a hose; the top end of the main body pipe is detachably connected to the protective joint of the top drive through a connecting mechanism; the bottom end of the main body pipe is detachably connected to one end of the intermediate joint, and the other end of the intermediate joint is connected to one end of the hose; the other end of the hose is inserted into the casing; the protective joint of the top drive is connected to the grouting device, and the end face of the hose away from the intermediate joint is an inclined surface; this solves the problem that in the past, when top drive drilling rigs were performing casing lowering operations, it was necessary to stop the casing lowering operation in the middle before grouting could be carried out, resulting in long casing lowering operation time and increased risk of casing jamming.

[0004] The aforementioned technology discloses a real-time grouting device for drilling top drives. By setting up a main pipe, intermediate joint, and hose for direct connection between the top drive and the casing, grouting can be performed simultaneously during casing running operations, greatly reducing the risk of casing jamming. The operation is continuous, effectively shortening casing running time and preventing accidents. This solves the problem that traditional top drive drilling rigs required interruption of casing running operations before grouting could be performed. However, the following shortcomings still exist in its use: 1. Simply connecting the intermediate connector to the threaded bottom of the outer side of the main tube is not ideal because the threads may loosen due to vibration during use. 2. The method of grouting by first entering the intermediate joint and then the hose can cause grout residue to get stuck in the inner thread of the intermediate joint. The sealing effect between the hose and the main pipe is poor, making it difficult to disassemble and replace the severely worn hose later. In view of this, this application proposes a drilling top drive real-time grouting device to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a real-time grouting device for drilling top drive to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drilling top drive real-time grouting device, comprising a main body pipe and a flexible hose with an inclined bottom end, wherein the top end of the main body pipe is integrally provided with a tapered internal threaded upper connector for connecting with a protective connector of the top drive, the middle of the outer side of the main body pipe is integrally provided with an external hexagonal structure, the bottom of the outer side of the main body pipe is provided with an external thread, and a pressure-adjusting tensioning anti-loosening screw connection mechanism is installed between the outer side of the main body pipe and the flexible hose; The adjustable tensioning anti-loosening screw mechanism includes: An internally threaded sleeve with an opening at the top, which is threaded onto the external thread; The anti-detachment sealing abutment assembly is connected and fixed at the top end of the hose and squeezed into contact with the bottom end of the body tube. The anti-detachment sealing abutment assembly is used to seal the connection between the hose and the body tube. The elastic compression assembly is installed inside the inner threaded sleeve and squeezes tightly to the bottom of the anti-detachment sealing abutment assembly. The elastic compression assembly is used to elastically tighten the anti-detachment sealing abutment assembly after the inner threaded sleeve is screwed onto the outer thread, so that it squeezes tightly to the bottom end of the body tube to seal it. A magnetic telescopic dustproof assembly is installed between the top of the internal threaded sleeve and the bottom of the external hexagonal structure. The magnetic telescopic dustproof assembly is used to cover and prevent dust from the exposed part of the external thread.

[0007] Preferably, the anti-detachment sealing abutment assembly includes an anti-detachment ring that is connected and fixed to the top end of the hose. The anti-detachment ring is movably sleeved in the internal threaded sleeve, and a sealing ring is bonded and fixed to the top of the anti-detachment ring, which is in tight contact with the bottom end of the main tube.

[0008] Preferably, the elastic compression assembly includes a compression ring disposed inside the internal threaded sleeve and movably sleeved on the outside of the hose. The bottom of the compression ring is fixedly connected with four vertical guide rods at equal intervals in a ring shape. The bottom ends of the vertical guide rods movably penetrate the bottom inner wall of the internal threaded sleeve and extend below it. Four springs in a compressed state are fixedly connected between the bottom of the compression ring and the bottom inner wall of the internal threaded sleeve. The springs are movably sleeved on the corresponding vertical guide rods. The outer side of the vertical guide rods is provided with scale lines that cooperate with the bottom of the internal threaded sleeve.

[0009] Preferably, the magnetic telescopic dust-blocking assembly includes a telescopic flexible hose fixedly connected to the top of the internal threaded sleeve and movably sleeved on the outside of the main body tube. The top of the telescopic flexible hose is fixedly connected to an annular iron plate movably sleeved on the outside of the main body tube. Pull rings are fixedly connected to both sides of the annular iron plate. An annular strong magnet that attracts the annular iron plate is fixedly connected to the bottom of the outer hexagonal structure.

[0010] Preferably, a circular perforation is provided on the bottom inner wall of the internally threaded sleeve, and the flexible tube is movably inserted into the circular perforation.

[0011] Preferably, U-shaped handles are fixedly connected to both sides of the internal threaded sleeve.

[0012] Preferably, the lower part of the body tube in the hexagonal structure is an external thread area.

[0013] The beneficial effects of this invention are as follows: 1. By combining the main body tube, external thread, internal thread sleeve, hose, anti-loosening sealing abutment component and elastic compression component, the hose and main body tube can be stably threadedly connected and the thread engagement point can be elastically tightened to prevent loosening, reducing the risk of loosening of the threaded connection point during use and improving the connection stability during use. 2. By combining the set hose, anti-detachment sealing abutment component and elastic compression component, a stable and tight sealing connection effect can be formed directly at the bottom of the main tube during screwing. This avoids the phenomenon of slurry entering the inner thread sleeve and getting stuck and solidifying into its inner thread. Therefore, it avoids the phenomenon of slurry residue solidifying at the thread position and jamming the anti-detachment ring, making it difficult to replace the hose later, and further improves the use effect. 3. By combining the internal threaded sleeve, the external hexagonal structure, and the magnetic telescopic dustproof component, the exposed part of the external thread can be shielded from dust after the thread is screwed on, reducing the phenomenon of dust and impurities getting stuck in the external thread and affecting subsequent adjustments and use, thus further improving the stability of use.

[0014] This invention features a series of structures that facilitate stable threaded connection between the hose and the main tube, and integrate elastic tension at the thread engagement point to prevent loosening. This reduces the risk of loosening during use, improves connection stability, and creates a stable, tight, and sealed connection at the bottom of the main tube during screwing. This prevents slurry from entering the inner threaded sleeve, causing it to solidify and become stuck inside the inner thread. Therefore, it avoids the problem of slurry residue solidifying at the thread position and jamming the anti-detachment ring, which would make it difficult to replace the hose later. This facilitates replacement when the hose is severely worn.

[0015] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure viewed from below; Figure 3 This is a schematic diagram of the front sectional view of the structure shown in this invention; Figure 4 for Figure 3 A magnified structural diagram of part A in the diagram.

[0017] Explanation of reference numerals in the attached drawings: 1-Main tube; 101-Tapered internal threaded upper connector; 102-External hexagonal structure; 103-External thread; 2-Hose; 201-Anti-detachment ring; 202-Sealing ring; 3-Internal threaded sleeve; 301-U-shaped handle; 4-Crushing ring; 401-Vertical guide rod; 402-Spring; 5-Telescopic hose; 501-Annular iron sheet; 502-Annular strong magnet. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Please see Figure 1A preferred embodiment of this application shows a drilling top drive real-time grouting device, including a main body pipe 1 and a flexible hose 2 with an inclined bottom end. The top end of the main body pipe 1 is integrally provided with a tapered internal threaded upper connector 101 for connecting with the protective connector of the top drive. The outer hexagonal structure 102 is integrally provided in the middle of the outer side of the main body pipe 1. An external thread 103 is provided at the bottom of the outer side of the main body pipe 1. The lower part of the main body pipe 1 located in the external hexagonal structure 102 is the area of ​​the external thread 103.

[0023] In this implementation plan: The existing device {application number}: 202310142551.0 discloses a drilling top drive real-time grouting device. The tapered internal thread upper connector 101 in this application is connected to the protective connector of the top drive. The grouting device is connected using the protective connector on the top drive that was originally used to connect the water hose. The top drive lowering hose 2 is inserted into the casing for grouting. The drilling fluid is guided through the relatively longer side of the other end of the hose 2 and flows downward from the side close to the inner wall of the casing. The gas in the empty casing is discharged upward from the other side of the inner wall of the casing. The principle of real-time grouting of the top drive is the same as the technical means in the above-mentioned prior art. This technical means will not be described in detail here. This application further improves upon the existing main body, as detailed in the following disclosure. To address the technical problems existing in the prior art, such as those disclosed in the background art above ("1. Simply connecting the intermediate joint to the threaded bottom of the outer side of the main body tube via a threaded connection inevitably leads to thread loosening due to vibration during use, resulting in unsatisfactory connection stability between the main body tube and the hose; 2. The method of injecting grout into the intermediate joint first and then into the hose can cause grout residue to get stuck at the inner thread of the intermediate joint, resulting in poor sealing between the hose and the main body tube, making it difficult to disassemble and replace the severely worn hose later"), this problem is clearly a real and difficult-to-solve issue. Therefore, to solve this technical problem, a pressure-adjusting tensioning anti-loosening screw connection mechanism has been added to this application.

[0024] Furthermore: like Figures 1 to 4 As shown, a pressure-adjustable tensioning anti-detachment screw connection mechanism is installed between the outer side of the main body tube 1 and the hose 2; The adjustable tension anti-loosening screw mechanism includes: The internal threaded sleeve 3 has an open top and is threaded onto the external thread 103. Both sides of the internal threaded sleeve 3 are fixedly connected with U-shaped handles 301. The U-shaped handles 301 facilitate the rotation of the internal threaded sleeve 3. A round through hole is opened on the bottom inner wall of the internal threaded sleeve 3. The flexible hose 2 is inserted into the round through hole to allow the flexible hose 2 to move through. The anti-detachment sealing abutment assembly is connected and fixed at the top of the hose 2 and squeezed into contact with the bottom of the body tube 1. The anti-detachment sealing abutment assembly is used to seal the connection between the hose 2 and the body tube 1. The spring-loaded compression assembly is installed inside the inner threaded sleeve 3 and is pressed tightly against the bottom of the anti-detachment sealing abutment assembly; the spring-loaded compression assembly is used to elastically tighten the anti-detachment sealing abutment assembly after the inner threaded sleeve 3 is screwed onto the outer thread 103, so that it is pressed tightly against the bottom end of the body tube 1 for sealing. The magnetic telescopic dustproof assembly is installed between the top of the internal threaded sleeve 3 and the bottom of the external hexagonal structure 102. The magnetic telescopic dustproof assembly is used to cover the exposed part of the external thread 103 to prevent dust.

[0025] Furthermore: The anti-detachment sealing abutment assembly includes an anti-detachment ring 201 that is connected and fixed to the top of the hose 2. The anti-detachment ring 201 is movably sleeved in the internal threaded sleeve 3. A sealing ring 202 that is pressed tightly against the bottom of the main tube 1 is bonded and fixed to the top of the anti-detachment ring 201. In this embodiment: the anti-detachment ring 201 and the sealing ring 202 cooperate to realize the connection between the top end of the main body tube 1 and the top end of the hose 2. The sealing ring 202 is squeezed and sealed with the bottom end of the main body tube 1 to prevent the injected slurry from entering the inner threaded sleeve 3.

[0026] Furthermore: The spring compression assembly includes a compression ring 4 disposed inside the internal threaded sleeve 3 and movably sleeved on the outside of the hose 2. The bottom of the compression ring 4 is fixedly connected with four vertical guide rods 401 at equal intervals in a ring shape. The bottom end of the vertical guide rods 401 movably penetrates the bottom inner wall of the internal threaded sleeve 3 and extends below it. The bottom inner wall of the internal threaded sleeve 3 is provided with four vertical guide holes that slide and fit with the corresponding outer side of the vertical guide rods 401, so as to allow the vertical guide rods 401 to pass through and guide them to slide vertically. Four springs 402 in a compressed state are fixedly connected between the bottom of the compression ring 4 and the bottom inner wall of the internal threaded sleeve 3. The springs 402 are movably sleeved on the corresponding vertical guide rods 401. The outer side of the vertical guide rods 401 is provided with scale lines that cooperate with the bottom of the internal threaded sleeve 3. In this embodiment: the compression ring 4, vertical guide rod 401, scale line, and spring 402 work together. When the inner threaded sleeve 3 is screwed onto the outer thread 103 and moves upward, the inner threaded sleeve 3, through the four springs 402, drives the compression ring 4 upward to compress the anti-detachment ring 201. In the compressed state, the compression ring 4 is blocked and restricted from moving upward by the anti-detachment ring 201. At this time, the inner threaded sleeve 3, which continues to move upward, slides upward on the four vertical guide rods 401 and compresses the four springs 402. The operator judges the spring 402 to be compressed to its maximum state by observing the length of the scale line exposed on the vertical guide rod 401, thus changing to a fixed compression state. Under the fixed compression, the anti-detachment ring 201 is protected. Even when the anti-disengagement ring 201 does not move downwards and the spring 402 is compressed to its maximum state for fixed clamping, there is still an upward tensioning force on the anti-disengagement ring 201. This can continuously tighten the anti-disengagement ring 201, preventing the sealing ring 202 from separating from the bottom end of the main body tube 1 due to aging and thinning. This ensures the stability of the sealing connection. Utilizing the interaction of forces, the bottom end of the spring 402 also has a downward tensioning force on the internal thread sleeve 3. This elastic tension ensures that the inner thread of the internal thread sleeve 3 and the external thread 103 are always in a tight and engaged state, enhancing the damping friction force during thread connection, reducing the risk of loosening, and further improving the stability of use.

[0027] It is worth noting that during installation, the spring 402 is compressed to its maximum state to form a hard squeeze on the anti-loosening ring 201, rather than just using elastic force to squeeze. The function of the spring 402 is to use the elastic force that remains after it is compressed to its maximum state to store energy, so as to tighten and loosen the thread engagement and prevent the sealing ring 202 from aging and thinning, thus preventing gaps.

[0028] Furthermore: The magnetic telescopic dustproof assembly includes a telescopic hose 5 fixedly connected to the top of the inner threaded sleeve 3 and movably sleeved on the outside of the main body tube 1. The top of the telescopic hose 5 is fixedly connected to an annular iron plate 501 movably sleeved on the outside of the main body tube 1. Pull rings are fixedly connected to both sides of the annular iron plate 501. The bottom of the outer hexagonal structure 102 is fixedly connected to an annular strong magnet 502 that attracts the annular iron plate 501. In this embodiment: the telescopic hose 5, the annular iron plate 501, the pull ring, and the annular strong magnet 502 are configured to work together. After the inner thread sleeve 3 is screwed onto the outer thread 103, pulling the pull ring upwards causes the annular iron plate 501 to be attracted upwards to the annular strong magnet 502, and stretches the telescopic hose 5. The telescopic hose 5 is used to shield the remaining exposed part of the outer thread 103 from dust, reducing the phenomenon that dust and impurities will get stuck in the outer thread 103 and affect subsequent adjustments and use.

[0029] The usage method of this embodiment is as follows: When the drilling top drive real-time grouting device is used, when the inner thread sleeve 3 is screwed onto the outer thread 103, as the inner thread sleeve 3 rotates and moves upward on the outer thread 103, the inner thread sleeve 3 drives the compression ring 4 upward through the four springs 402 to compress and move the anti-detachment ring 201 upward. When the anti-detachment ring 201 drives the sealing ring 202 upward to contact the bottom end of the main body pipe 1, it is blocked and restricted by it. At this time, the compression ring 4 is blocked and restricted by the anti-detachment ring 201 and no longer moves upward. At this time, the inner thread sleeve 3, which continues to move upward, slides upward on the four vertical guide rods 401 and compresses the four springs 402. The personnel judge by observing the length of the scale line exposed on the vertical guide rod 401 that the spring 402 is compressed to the maximum state to change to a fixed compression state. Under the fixed compression, the anti-detachment ring 201 is ensured not to move downward, and when the spring 402 is compressed to the maximum state for fixed compression, there is still one spring that compresses the anti-detachment ring 201. The tensioning elasticity of the spring 402 continuously tightens the anti-loosening ring 201, preventing the sealing ring 202 from separating from the bottom of the main tube 1 due to aging and thinning. This ensures the stability of the sealing connection. Utilizing the mutual action of forces, the bottom of the spring 402 also exerts a downward tensioning elasticity on the inner threaded sleeve 3. This elastic tension keeps the inner thread of the inner threaded sleeve 3 and the outer thread 103 in a tight and engaged state, enhancing the damping friction during thread connection, reducing the risk of loosening, and achieving a stable threaded connection between the hose 2 and the main tube 1. This also provides an integrated elastic tensioning and anti-loosening effect at the thread engagement point, improving the connection stability during use. Furthermore, it directly forms a stable seal at the bottom of the main tube 1, preventing slurry from entering the inner threaded sleeve 3 and solidifying into its inner thread. Therefore, it avoids the phenomenon of slurry residue solidifying at the thread position and jamming the anti-loosening ring 201, making it difficult to replace the hose 2 later. After the inner thread sleeve 3 is tightened, the pull ring is pulled upward to drive the annular iron piece 501 upward to attract the annular strong magnet 502, and to stretch the telescopic hose 5. The telescopic hose 5 is used to cover the exposed part of the remaining external thread 103 to prevent dust, reduce the phenomenon that dust and impurities will get stuck in the external thread 103 and affect subsequent adjustment and use, and further improve the stability of use. When it is necessary to disassemble and replace the severely worn hose 2, first pull down the pull ring to separate the annular iron piece 501 from the annular strong magnet 502. Then rotate the inner threaded sleeve 3 to disengage it from the outer thread 103. Then, the personnel can pull up the anti-detachment ring 201 to pull the hose 2 upward. The new hose 2 can then be passed through from the top to below the inner threaded sleeve 3. The anti-detachment ring 201 at the top of the new hose 2 is inserted into the inner threaded sleeve 3 to prevent detachment. The inner threaded sleeve 3 and the outer thread 103 can then be screwed together in the same way to achieve direct sealing and connection with the bottom of the main tube 1, thus achieving the purpose of replacing the hose 2.

[0030] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The above-described embodiments are merely one implementation of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this invention should be determined by the appended claims.

Claims

1. A drilling top drive real-time grouting device, comprising a main body pipe (1) and a flexible hose (2) with an inclined bottom end, wherein the top end of the main body pipe (1) is integrally provided with a tapered internal threaded upper connector (101) for connecting with a protective connector of the top drive, the middle of the outer side of the main body pipe (1) is integrally provided with an external hexagonal structure (102), the bottom of the outer side of the main body pipe (1) is provided with an external thread (103), and a pressure-adjusting tensioning anti-loosening screw connection mechanism is installed between the outer side of the main body pipe (1) and the flexible hose (2); The adjustable tensioning anti-loosening screw mechanism includes: An internal threaded sleeve (3) has an opening at the top and is threaded onto the external thread (103); The anti-detachment sealing abutment assembly is connected and fixed at the top of the hose (2) and squeezed into contact with the bottom of the body tube (1); The elastic compression assembly is installed inside the inner threaded sleeve (3) and is pressed tightly against the bottom of the anti-detachment sealing abutment assembly; A magnetic telescopic dust-blocking assembly is installed between the top of the inner threaded sleeve (3) and the bottom of the outer hexagonal structure (102).

2. The drilling top drive real-time grouting device as described in claim 1, characterized in that: The anti-detachment sealing abutment assembly includes an anti-detachment ring (201) that is connected and fixed at the top of the hose (2). The anti-detachment ring (201) is movably sleeved in the internal thread sleeve (3). The top of the anti-detachment ring (201) is bonded and fixed with a sealing ring (202) that is squeezed and contacted with the bottom end of the main tube (1).

3. The drilling top drive real-time grouting device as described in claim 2, characterized in that: The elastic compression assembly includes a compression ring (4) disposed inside the internal threaded sleeve (3) and movably sleeved on the outside of the hose (2). The bottom of the compression ring (4) is fixedly connected with four vertical guide rods (401) at equal intervals in a ring shape. The bottom end of the vertical guide rod (401) movably penetrates the bottom inner wall of the internal threaded sleeve (3) and extends below it. The bottom of the compression ring (4) and the bottom inner wall of the internal threaded sleeve (3) are fixedly connected with four springs (402) in a compressed state. The springs (402) are movably sleeved on the corresponding vertical guide rods (401). The outside of the vertical guide rods (401) is provided with scale lines that cooperate with the bottom of the internal threaded sleeve (3).

4. The drilling top drive real-time grouting device as described in claim 1, characterized in that: The magnetic telescopic dustproof assembly includes a telescopic hose (5) fixedly connected to the top of the inner threaded sleeve (3) and movably sleeved on the outside of the main body tube (1). The top of the telescopic hose (5) is fixedly connected to an annular iron plate (501) movably sleeved on the outside of the main body tube (1). Pull rings are fixedly connected to both sides of the annular iron plate (501). The bottom of the outer hexagonal structure (102) is fixedly connected to an annular strong magnet (502) that attracts the annular iron plate (501).

5. The drilling top drive real-time grouting device as described in claim 1, characterized in that: A circular perforation is provided on the bottom inner wall of the internal threaded sleeve (3), and the flexible tube (2) is movably inserted into the circular perforation.

6. The drilling top drive real-time grouting device as described in claim 1, characterized in that: Both sides of the internal threaded sleeve (3) are fixedly connected with U-shaped handles (301).

7. The drilling top drive real-time grouting device as described in claim 1, characterized in that: The lower part of the main tube (1) located in the outer hexagonal structure (102) is the area of ​​the external thread (103).

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