Large-caliber underground vertical well multi-media labyrinth sealing device and preparation method thereof

Abstract

The present invention discloses a large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof, comprising a well wall, a sealing device body installed at the inner wall position of the well wall, a down-the-hole hammer top installed in the middle of the sealing device body, a hammer handle installed at the bottom of the down-the-hole hammer top, a down-the-hole hammer body provided at the bottom of the hammer handle, a down-the-hole hammer seat provided at the bottom of the down-the-hole hammer body, sealing debris provided on the outside of the down-the-hole hammer body, and a drive seat installed at the upper end of the down-the-hole hammer top. The large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof of the present invention effectively solve the wear generated by the rotation of the sealing material, reduce the intermediate adjustment process in the sealing process, enable the down-the-hole hammer to be used normally in deep layers with high water content and high negative pressure space at the bottom of the well, and reduce the production cost exponentially, effectively solving the construction problem of the down-the-hole hammer in high water content layers and high negative pressure space.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling equipment, in particular to a large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof. Background Art

[0002] Vertical well multi-media labyrinth sealing device is a supporting device for wellhead sealing. In the construction of large-diameter wells, the most effective drilling method is to use the pressure of liquid and gas to drill under the state of rotary impact. Therefore, the seal between the well wall and the drill bit is the most important link. Existing large-diameter sealing devices all use organic materials as filling sealing media, such as rubber, nylon, etc. Traditional materials achieve sealing through frictional contact between the filling material and the well wall. With the continuous development of science and technology, people have higher and higher requirements for the manufacturing process of vertical well multi-media labyrinth sealing devices.

[0003] The existing vertical well multi-media labyrinth sealing device has certain disadvantages when used. During construction, the rotation of the sealing body causes friction between the filling sealing material and the wellbore wall to achieve the sealing function. Due to the friction between the rotating body and the wellbore wall, the filling sealing material is continuously worn, and the sealing performance gradually decays, which directly affects the sealing performance of the sealing body during the drilling process. Therefore, during construction, it is necessary to replace the sealing filler from time to time to meet the sealing requirements. The method of replacing or adjusting the sealing material can only be achieved by lifting the drill to replace or adjust the sealing filling material to achieve the best sealing effect. This repeated lifting of the drill to replace and adjust the sealing material treatment method results in extremely poor sealing effect in the middle and late stages of the average sealing time unit, especially in the late stages, and low drilling efficiency, increasing the construction cost and the risk of accidents during the lifting and drilling non-drilling time periods, which has brought certain adverse effects on people's use process. For this reason, we propose a large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof. The device effectively solves the wear caused by the rotation of the sealing material, reduces the intermediate adjustment process in the sealing process, and enables the down-the-hole hammer to be used normally in deep layers with high water content and high negative pressure spaces at the bottom of the well, and reduces the production cost exponentially, effectively solving the construction difficulties of the down-the-hole hammer in high water content layers and high negative pressure spaces, and can effectively solve the problems in the background technology.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof, including a well wall, a sealing device body is installed at the inner wall position of the well wall, the middle part of the sealing device body is installed with the top of the down-the-hole hammer, the bottom of the down-the-hole hammer top is installed with a hammer handle, the bottom of the hammer handle is provided with a down-the-hole hammer body, the bottom of the down-the-hole hammer body is provided with a down-the-hole hammer seat, and the outside of the down-the-hole hammer body is provided with sealing debris.

[0008] As a preferred technical solution of the present application, a drive seat is installed at the upper end of the top of the down-the-hole hammer, a bolt seat is installed between the top of the down-the-hole hammer and the drive seat, a No. 1 connecting chain and a No. 2 connecting chain are connected between the top of the down-the-hole hammer and the main body of the sealing device, a No. 2 lock chain is installed on the No. 2 connecting chain, and a No. 1 lock chain is installed on the No. 1 connecting chain.

[0009] As a preferred technical solution of the present application, a card slot is provided on the outer wall of the sealing device body, a card block is installed on the inner wall of the well wall at the position of the card slot, a sealing outer layer and a sealing seat are positioned on the outer wall of the sealing device body, and a No. 1 reinforcement seat and a No. 2 reinforcement seat are installed inside the sealing device body, and a screw is provided on the No. 1 reinforcement seat.

[0010] As a preferred technical solution of the present application, reinforcing ribs are installed between the No. 1 reinforcing seat and the No. 2 reinforcing seat, positioning welding points are installed between the reinforcing ribs and the No. 2 reinforcing seat and the No. 1 reinforcing seat, a sealing protective pad is positioned on the inner wall of the No. 1 reinforcing seat, and the sealing outer layer includes rock wool reinforcement material, wear-resistant ceramic material, vinyl material and sealing resin.

[0011] As a preferred technical solution of the present application, the well wall and the sealing device body are sealed and connected, and the sealing device body is engaged with the inner wall of the well wall through a slot and a block, the top of the down-the-hole hammer, the hammer handle, the down-the-hole hammer body and the down-the-hole hammer seat are integrally formed, and the sealing debris is multi-media powder.

[0012] As a preferred technical solution of the present application, the bottom of the drive seat is positioned and installed through a bolt seat and the top position of the down-the-hole hammer top, and the down-the-hole hammer top and the sealing device body are positioned and installed through a No. 1 connecting chain and a No. 2 connecting chain.

[0013] As a preferred technical solution of the present application, the sealing device body is integrally formed with the sealing outer layer and the sealing seat, the sealing device body is integrally formed with the card slot, and the sealing device body is fixedly installed with the No. 1 reinforcement seat.

[0014] As a preferred technical solution of the present application, the No. 1 reinforcement seat and the No. 2 reinforcement seat are positioned by reinforcement ribs, and the reinforcement ribs and the No. 1 reinforcement seat and the No. 2 reinforcement seat are fixed by positioning welding points.

[0015] A method for preparing a multi-media labyrinth sealing device for a large-diameter underground vertical well comprises the following steps:

[0016] S1: The sealing device body, the sealing outer layer, and the sealing seat are integrally formed by die-casting. The sealing device body and the card slot are integrally formed. The interior of the sealing outer layer includes rock wool reinforcement material, wear-resistant ceramic material, vinyl material and sealing resin, which are compositely integrally formed.

[0017] S2: A second reinforcement seat is positioned and installed inside the main body of the sealing device, and the reinforcement ribs are integrally positioned with the first reinforcement seat. The reinforcement ribs are welded to the second reinforcement seat and the first reinforcement seat through positioning welding points to fix the shape;

[0018] S3: The main body of the sealing device is sealed at the inner wall of the well wall through the block and the slot. The top of the down-the-hole hammer is connected to the main body of the sealing device through the No. 1 connecting chain and the No. 1 connecting chain, and drives the hammer handle, the down-the-hole hammer body and the down-the-hole hammer seat to knock. The knocking debris becomes sealing debris. The discharged high-pressure gas mixes the powder and chips and forces them to invade the maze, forming sealing rings of different media to achieve a permanent sealing effect.

[0019] (3) Beneficial effects

[0020] Compared with the prior art, the present invention provides a large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof, which has the following beneficial effects: the large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof effectively solve the wear caused by the rotation of the sealing material, reduce the intermediate adjustment process in the sealing process, enable the down-the-hole hammer to be used normally in high water-containing deep layers and high negative pressure spaces at the bottom of the well, and reduce the production cost exponentially, effectively solving the construction difficulties of the down-the-hole hammer in high water-containing layers and high negative pressure spaces. In underground strata with abundant water content, due to the installation of a After the "multi-media labyrinth sealing device" was developed, the negative pressure generated by the water column in the annular gap between the well wall and the rotating drill bit was blocked at the bottom of the well, which completely solved the technical problem that the down-the-hole hammer could not work normally in the deep high-negative-pressure space. Since the sealing material uses the powder generated by the formation during impact and crushing as the sealing medium, the cost of the sealing material is reduced. The "multi-media labyrinth sealing device" uses the powder generated by the impact of the geological layer during the drilling process as the filling material, and the filling material is provided according to the changes in the formation quality, so it is named "multi-media". Since the pneumatic down-the-hole hammer needs to input high-pressure air when working, As the driving force, the high-pressure gas discharged after work mixes the cuttings and forces them into the labyrinth, forming a sealing ring of different media to achieve a sealing effect. As long as the down-the-hole hammer is in working condition, an effective seal can be generated, otherwise it will be ineffective. Since the cuttings and high-pressure mixture in the wellbore are continuously input into the labyrinth cavity, a sealing ring that will never wear out is formed, and it is not limited by the diameter size of the sealing device. This sealing material is locally sourced, will never wear out, has low cost, and is highly effective. It reduces the number of times the drill is lifted during construction, thereby reducing safety hazards generated during non-drilling periods. First of all, the sealing filling material The material is provided by drill cuttings, which is basically 0 cost. Secondly, in terms of sealer manufacturing, there is no special processing requirement and the processing fee is equal to that of traditional sealing devices. The sealing performance is improved exponentially compared with traditional seals. In terms of operation, it reduces the intermediate operation process compared with traditional seals. For example, reducing the large drill can save 5-10% of the total drilling cost. Because it uses a double-wall drill pipe reverse circulation construction method, the drill cuttings are discharged from the inner hole of the drill pipe into the ground water pool, so the environmental pollution index is fully up to standard. The entire vertical well multi-media labyrinth sealing device has a simple structure, easy operation, and better effect than traditional methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the large-diameter underground vertical well multi-media labyrinth sealing device and its preparation method according to the present invention.

[0022] Figure 2 It is a structural schematic diagram of the sealing device main body in the large-diameter underground vertical well multi-media labyrinth sealing device and the preparation method thereof of the present invention.

[0023] Figure 3It is a structural schematic diagram of a top view of the sealing device main body in the large-diameter underground vertical well multi-media labyrinth sealing device and the preparation method thereof of the present invention.

[0024] Figure 4 This is a structural schematic diagram of the enlarged view of point A in the large-diameter underground vertical well multi-media labyrinth sealing device and its preparation method of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the reinforcement seat in the large-diameter underground vertical well multi-media labyrinth sealing device and the preparation method thereof of the present invention.

[0026] Figure 6 It is a structural schematic diagram of the sealing outer layer in the large-diameter underground vertical well multi-media labyrinth sealing device and its preparation method of the present invention.

[0027] In the figure: 1. Well wall; 2. No. 1 connecting chain; 3. Bolt seat; 4. Top of down-the-hole hammer; 5. Drive seat; 6. No. 2 chain; 7. No. 2 connecting chain; 8. Hammer handle; 9. No. 1 chain; 10. Sealing device body; 11. Sealing debris; 12. Down-the-hole hammer body; 13. Down-the-hole hammer seat; 14. Slot; 15. Sealing outer layer; 16. Sealing seat; 17. Screw; 18. No. 1 reinforcement seat; 19. Block; 20. Sealing protective pad; 21. Reinforcement rib; 22. Positioning welding point; 23. No. 2 reinforcement seat; 24. Wear-resistant ceramic material; 25. Rock wool reinforcement material; 26. Vinyl material; 27. Sealing resin. DETAILED DESCRIPTION

[0028] The technical scheme of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but it will be understood by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. Those who do not specify specific conditions in the embodiments are carried out according to normal conditions or the conditions recommended by the manufacturer. Those whose reagents or instruments are not specified by the manufacturer are conventional products that can be purchased commercially.

[0029] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present 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.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] Example 1:

[0032] like Figure 1-6 As shown, a large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof include a well wall 1, a sealing device body 10 is installed at the inner wall position of the well wall 1, a down-the-hole hammer top 4 is installed in the middle of the sealing device body 10, a hammer handle 8 is installed at the bottom of the down-the-hole hammer top 4, a down-the-hole hammer body 12 is provided at the bottom of the hammer handle 8, a down-the-hole hammer seat 13 is provided at the bottom of the down-the-hole hammer body 12, and sealing debris 11 is provided on the outside of the down-the-hole hammer body 12.

[0033] Furthermore, a drive seat 5 is installed at the upper end of the down-the-hole hammer top 4, a bolt seat 3 is installed between the down-the-hole hammer top 4 and the drive seat 5, a No. 2 connecting chain 7 and a No. 1 connecting chain 2 are connected between the down-the-hole hammer top 4 and the sealing device body 10, a No. 2 lock chain 6 is installed on the No. 2 connecting chain 7, and a No. 1 lock chain 9 is installed on the No. 1 connecting chain 2.

[0034] Furthermore, the well wall 1 and the sealing device body 10 are sealed and connected, and the sealing device body 10 is engaged with the inner wall position of the well wall 1 through the card slot 14 and the card block 19. The top of the down-the-hole hammer 4, the hammer handle 8, the down-the-hole hammer body 12, and the down-the-hole hammer seat 13 are integrally formed, and the sealing debris 11 is multi-media powder.

[0035] Furthermore, the bottom of the driving seat 5 is positioned and installed through the bolt seat 3 and the top position of the down-the-hole hammer top 4, and the down-the-hole hammer top 4 and the sealing device body 10 are positioned and installed through the No. 2 connecting chain 7 and the No. 1 connecting chain 2.

[0036] Example 2:

[0037] Based on the first embodiment, Figure 1-6 As shown, a large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof include a well wall 1, a sealing device body 10 is installed at the inner wall position of the well wall 1, a down-the-hole hammer top 4 is installed in the middle of the sealing device body 10, a hammer handle 8 is installed at the bottom of the down-the-hole hammer top 4, a down-the-hole hammer body 12 is provided at the bottom of the hammer handle 8, a down-the-hole hammer seat 13 is provided at the bottom of the down-the-hole hammer body 12, and sealing debris 11 is provided on the outside of the down-the-hole hammer body 12.

[0038] Furthermore, a card slot 14 is provided on the outer wall of the sealing device body 10, and a card block 19 is installed on the inner wall of the well wall 1 at the position of the card slot 14. A sealing outer layer 15 and a sealing seat 16 are positioned on the outer wall of the sealing device body 10. A No. 1 reinforcement seat 18 and a No. 2 reinforcement seat 23 are installed inside the sealing device body 10, and a screw 17 is provided on the No. 1 reinforcement seat 18.

[0039] Furthermore, the sealing device body 10 is integrally formed with the sealing outer layer 15 and the sealing seat 16 , the sealing device body 10 is integrally formed with the card slot 14 , and the sealing device body 10 is fixedly installed with the No. 1 reinforcement seat 18 .

[0040] Example 3:

[0041] Based on the first and second embodiments, Figure 1-6 As shown, a large-diameter underground vertical well multi-media labyrinth sealing device and a preparation method thereof include a well wall 1, a sealing device body 10 is installed at the inner wall position of the well wall 1, a down-the-hole hammer top 4 is installed in the middle of the sealing device body 10, a hammer handle 8 is installed at the bottom of the down-the-hole hammer top 4, a down-the-hole hammer body 12 is provided at the bottom of the hammer handle 8, a down-the-hole hammer seat 13 is provided at the bottom of the down-the-hole hammer body 12, and sealing debris 11 is provided on the outside of the down-the-hole hammer body 12.

[0042] Furthermore, reinforcing ribs 21 are installed between the No. 1 reinforcing seat 18 and the No. 2 reinforcing seat 23, and positioning welding points 22 are installed between the reinforcing ribs 21 and the No. 2 reinforcing seat 23 and the No. 1 reinforcing seat 18. A sealing protective pad 20 is positioned on the inner wall of the No. 1 reinforcing seat 18, and the sealing outer layer 15 includes rock wool reinforcement material 25, wear-resistant ceramic material 24, vinyl material 26 and sealing resin 27.

[0043] Furthermore, the No. 1 reinforcement seat 18 and the No. 2 reinforcement seat 23 are positioned by a reinforcement rib 21 , and the No. 1 reinforcement seat 18 and the No. 2 reinforcement seat 23 are fixed by positioning welding points 22 .

[0044] A method for preparing a multi-media labyrinth sealing device for a large-diameter underground vertical well comprises the following steps:

[0045] S1: The sealing device body 10, the sealing outer layer 15, and the sealing seat 16 are integrally formed by die-casting. The sealing device body 10 and the card slot 14 are integrally formed. The interior of the sealing outer layer 15 includes a rock wool reinforcement material 25, a wear-resistant ceramic material 24, a vinyl material 26, and a sealing resin 27, which are compositely integrally formed;

[0046] S2: The second reinforcement seat 23, the reinforcement rib 21 and the first reinforcement seat 18 are positioned and installed in the inner position of the sealing device body 10 to be positioned integrally. The reinforcement rib 21 and the second reinforcement seat 23 and the first reinforcement seat 18 are welded and positioned through positioning welding points 22 to fix the shape;

[0047] S3: The sealing device body 10 is sealed at the inner wall position of the well wall 1 through the block 19 and the slot 14. The top 4 of the down-the-hole hammer is connected to the sealing device body 10 through the No. 2 connecting chain 7 and the No. 1 connecting chain 2, and drives the hammer handle 8, the down-the-hole hammer body 12, and the down-the-hole hammer seat 13 to knock. The knocked debris becomes the sealing debris 11. The discharged high-pressure gas mixes the powder and chips and forces them to invade the maze, forming a sealing ring of different media to achieve a permanent sealing effect.

[0048] Working principle: The present invention includes a well wall 1, a No. 1 connecting chain 2, a bolt seat 3, a down-the-hole hammer top 4, a drive seat 5, a No. 2 chain 6, a No. 2 connecting chain 7, a hammer handle 8, a No. 1 chain 9, a sealing device body 10, sealing debris 11, a down-the-hole hammer body 12, a down-the-hole hammer seat 13, a slot 14, a sealing outer layer 15, a sealing seat 16, a screw 17, a No. 1 reinforcement seat 18, a block 19, a sealing protective pad 20, a reinforcement rib 21, a positioning welding point 22, a No. 2 reinforcement seat 23, a wear-resistant ceramic material 24, a rock wool reinforcement material 25, a vinyl material 26, and a sealing resin 27. The sealing device body 10, the sealing outer layer 15, and the sealing seat 16 are integrally molded and die-casted. The sealing device body 10 and the slot 14 are integrally molded. The interior of the sealing outer layer 15 includes a rock wool reinforcement material 25, a wear-resistant ceramic material 24. The vinyl material 26 and the sealing resin 27 are compositely formed into one piece. The No. 2 reinforcing seat 23, the reinforcing rib 21 and the No. 1 reinforcing seat 18 are positioned and installed in the internal position of the sealing device body 10 for integrated positioning. The reinforcing rib 21 and the No. 2 reinforcing seat 23 and the No. 1 reinforcing seat 18 are welded and positioned by positioning welding points 22 to fix the molding. The sealing device body 10 is sealed at the inner wall position of the well wall 1 through the clamping block 19 and the clamping groove 14. The top end 4 of the down-the-hole hammer is connected to the sealing device body 10 through the No. 2 connecting chain 7 and the No. 1 connecting chain 2, and drives the hammer handle 8, the down-the-hole hammer body 12, and the down-the-hole hammer seat 13 to knock. The knocked debris becomes the sealing debris 11. The discharged high-pressure gas mixes the powder and chips and forces them to invade the maze to form sealing rings of different media, thereby achieving a permanent sealing effect.

[0049] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "include," "comprise," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "includes a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0050] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A multi-media labyrinth sealing device for a large-diameter underground vertical well, comprising a well wall (1), characterized in that: A sealing device body (10) is installed at the inner wall position of the well wall (1), a down-the-hole hammer top (4) is installed in the middle of the sealing device body (10), a hammer handle (8) is installed at the bottom of the down-the-hole hammer top (4), a down-the-hole hammer body (12) is provided at the bottom of the hammer handle (8), a down-the-hole hammer seat (13) is provided at the bottom of the down-the-hole hammer body (12), and sealing debris (11) is provided on the outside of the down-the-hole hammer body (12). The knocked debris becomes the sealing debris (11), and the discharged high-pressure gas mixes the powder and debris and forces it to invade the maze, forming a sealing ring of different media, thereby achieving a permanent sealing effect.

2. The multi-media labyrinth sealing device for large-diameter underground vertical wells according to claim 1, characterized in that: A driving seat (5) is installed at the upper end of the down-the-hole hammer top (4), a bolt seat (3) is installed between the down-the-hole hammer top (4) and the driving seat (5), a second connecting chain (7) and a first connecting chain (2) are connected between the down-the-hole hammer top (4) and the sealing device body (10), a second lock chain (6) is installed on the second connecting chain (7), and a first lock chain (9) is installed on the first connecting chain (2).

3. The multi-media labyrinth sealing device for large-diameter underground vertical wells according to claim 1, characterized in that: The outer wall of the sealing device body (10) is provided with a card slot (14), the inner wall of the well wall (1) is provided with a card block (19) at the position of the card slot (14), the outer wall of the sealing device body (10) is provided with a sealing outer layer (15) and a sealing seat (16), and the interior of the sealing device body (10) is provided with a No. 1 reinforcement seat (18) and a No. 2 reinforcement seat (23), and the No. 1 reinforcement seat (18) is provided with a screw (17).

4. The multi-media labyrinth sealing device for large-diameter underground vertical wells according to claim 3, characterized in that: A reinforcing rib (21) is installed between the No. 1 reinforcing seat (18) and the No. 2 reinforcing seat (23), and a positioning welding point (22) is installed between the reinforcing rib (21) and the No. 2 reinforcing seat (23) and the No. 1 reinforcing seat (18). A sealing protective pad (20) is positioned on the inner wall of the No. 1 reinforcing seat (18), and the sealing outer layer (15) includes a rock wool reinforcement material (25), a wear-resistant ceramic material (24), a vinyl material (26) and a sealing resin (27).

5. The multi-media labyrinth sealing device for large-diameter underground vertical wells according to claim 1, characterized in that: The well wall (1) and the sealing device body (10) are sealed and connected, and the sealing device body (10) is engaged with the inner wall of the well wall (1) through the card slot (14) and the card block (19); the down-the-hole hammer top (4), the hammer handle (8), the down-the-hole hammer body (12), and the down-the-hole hammer seat (13) are integrally formed; and the sealing debris (11) is multi-media powder.

6. The multi-media labyrinth sealing device for large-diameter underground vertical wells according to claim 2, characterized in that: The bottom of the driving seat (5) is positioned and installed via a bolt seat (3) and the top position of the down-the-hole hammer top (4), and the down-the-hole hammer top (4) and the sealing device body (10) are positioned and installed via a second connecting chain (7) and a first connecting chain (2).

7. The multi-media labyrinth sealing device for large-diameter underground vertical wells according to claim 3, characterized in that: The sealing device body (10), the sealing outer layer (15), and the sealing seat (16) are integrally formed, the sealing device body (10) and the card slot (14) are integrally formed, and the sealing device body (10) and the No. 1 reinforcement seat (18) are fixedly installed.

8. The multi-media labyrinth sealing device for large-diameter underground vertical wells according to claim 4, characterized in that: The first reinforcement seat (18) and the second reinforcement seat (23) are positioned via reinforcement ribs (21), and the reinforcement ribs (21) and the first reinforcement seat (18) and the second reinforcement seat (23) are fixed via positioning welding points (22).

9. The method for preparing the large-diameter underground vertical well multi-media labyrinth seal device according to any one of claims 1 to 8, characterized in that: The following steps are included: S1: The sealing device body (10), the sealing outer layer (15), and the sealing seat (16) are integrally molded by die casting, the sealing device body (10) and the card slot (14) are integrally molded, and the interior of the sealing outer layer (15) includes rock wool reinforcement material (25), wear-resistant ceramic material (24), vinyl material (26) and sealing resin (27), which are compositely molded into one piece; S2: A second reinforcing seat (23), a reinforcing rib (21) and a first reinforcing seat (18) are positioned and installed in an internal position of the sealing device body (10) for integral positioning, and the reinforcing rib (21) and the second reinforcing seat (23) and the first reinforcing seat (18) are welded and positioned through positioning welding points (22) to fix the shape; S3: The sealing device body (10) is sealed at the inner wall position of the well wall (1) through the clamping block (19) and the clamping groove (14), and the top end (4) of the down-the-hole hammer is connected to the sealing device body (10) through the second connecting chain (7) and the first connecting chain (2), and drives the hammer handle (8), the down-the-hole hammer body (12), and the down-the-hole hammer seat (13) to strike.

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