A tooling and method for assembling a ruptured disc

Abstract

This invention belongs to the field of downhole tool technology, specifically relating to a fracture disc assembly fixture and method. The fracture disc assembly fixture is used to assemble a fracture disc into the outer cylinder of a downhole tool. The outer cylinder includes a sealing section and a guide section coaxially arranged, the inner diameter of the guide section being larger than the inner diameter of the sealing section. The fracture disc assembly fixture further includes: a delivery cylinder, configured to move coaxially within the guide section, which delivers at least a portion of the thickness of the fracture disc into the sealing section; and an installation cylinder, configured to move coaxially within the guide section, which completely delivers the fracture disc into the sealing section, sealing the fracture disc with the sealing section. This invention can meet the installation requirements of fracture discs under conditions such as long installation strokes and small inner diameters of the matching outer cylinder.

Description

Technical Field

[0001] This invention belongs to the field of downhole tool technology, specifically, it relates to a fracture disc assembly tooling and a fracture disc assembly method. Background Technology

[0002] As exploration and development deepen, high-pressure, fragile, and fracture-resistant discs are increasingly being designed and applied to downhole tools such as floating couplings and formation isolation subs, effectively solving the problem of running completion tubing into wells with large reach and long horizontal sections.

[0003] For example, when implementing casing completion technology, a floating coupling with a fracture plate can be used for running casing; when implementing suspended screen completion technology, a formation isolation sub with a fracture plate can be used for running the tubing string. Both of these downhole tools can effectively seal off air or low-density drilling fluid during the corresponding process, reducing the positive pressure of the tubing string below the fracture plate on the wellbore, thereby significantly improving the running performance of the completion string.

[0004] Although the application of high-pressure, fragile fracturing discs is becoming increasingly widespread, their fragile nature limits their placement in practical applications. Typically, they are only installed at the ends of upper or lower connectors or other detachable components. This is because if the fracturing disc needs to be inserted into the component for installation, there are no suitable installation tools available, and the disc is easily damaged during insertion. This limitation restricts the optimized design and functional expansion of downhole tool structures.

[0005] In the existing technology, there is a method of assembling the fragile disc by covering its edge with a protective sleeve. However, the protective sleeve not only limits the detection of the disc's rotation and other movement performance on the mating surface, but also the coaxiality between the outer surface of the fragile disc and the mating surface may have a large error after covering it with a protective sleeve. When the installation stroke is long, there is still a possibility of local damage at the weak edge. Furthermore, for fragile discs made of transparent materials such as tempered glass that are subjected to high pressure, it is impossible to observe whether there is local breakage or whether the installation requirements are met after covering them, and it is impossible to judge the installation performance.

[0006] Therefore, there is a need for a highly reliable assembly tooling and method for fragile discs that can meet the installation requirements and performance of fragile discs under conditions such as long installation stroke and small inner diameter of matching outer cylinder. Summary of the Invention

[0007] To address the technical problems mentioned above, this invention aims to provide a rupture disc assembly fixture that can meet the installation requirements of the fragile disc and ensure installation performance under conditions such as long installation stroke and small inner diameter of the matching outer cylinder.

[0008] The present invention also proposes a method for assembling a fragile disc, which can meet the installation requirements of the fragile disc and ensure installation performance under working conditions such as long installation stroke of the fragile disc and small inner diameter of the matching outer cylinder.

[0009] According to the present invention, a fracturing disk assembly fixture is provided for assembling a fracturing disk into the outer cylinder of a downhole tool. The outer cylinder includes a sealing section and a guide section coaxially arranged, wherein the inner diameter of the guide section is larger than the inner diameter of the sealing section. The fracturing disk assembly fixture further includes:

[0010] A feeding cylinder, configured to move coaxially within the guide section, the feeding cylinder feeding at least a portion of the thickness of the rupture disc into the sealing section;

[0011] The mounting cylinder is configured to move coaxially within the guide section, and the mounting cylinder completely inserts the rupture disc into the sealing section, thereby sealing the rupture disc with the sealing section.

[0012] In a preferred embodiment, a feeding head is provided at the upper end of the feeding cylinder, the outer wall of the feeding head and the inner wall of the guide section form a sliding guide, the inner diameter of the feeding head is smaller than the outer diameter of the rupture disc, and a positioning ring for positioning the rupture disc is provided at the upper end of the feeding head.

[0013] In a preferred embodiment, the height of the positioning ring is less than the thickness of the rupture disc.

[0014] In a preferred embodiment, a first guide slope is provided on the outer wall of the positioning ring.

[0015] In a preferred embodiment, a second guide slope is provided at the connection between the inner wall of the sealing section and the guide section, and the inclination angle of the second guide slope is greater than or equal to the inclination angle of the first guide slope.

[0016] In a preferred embodiment, a first limiting block is provided on the outer wall of the dispensing cylinder. The size of the first limiting block is larger than the inner diameter of the guide section. When the end of the positioning ring axially abuts against the inner wall of the outer cylinder, the first limiting block axially abuts against the end of the guide section.

[0017] In a preferred embodiment, a sealing ring is provided within the sealing section, and the distance from the connection point between the sealing section and the guide section to the sealing ring is greater than or equal to the thickness of the rupture disc.

[0018] In a preferred embodiment, an external thread is provided on the outer wall of the mounting cylinder and an internal thread is provided on the inner wall of the guide section. After the mounting cylinder and the guide section are threadedly engaged, the mounting cylinder can be rotated relative to the guide section, which allows the mounting cylinder to move into the guide section, thereby squeezing the rupture disc and causing the rupture disc to enter the sealing section, thereby forming a seal between the rupture disc and the sealing section.

[0019] In a preferred embodiment, a second limiting block is provided on the outer wall of the mounting cylinder. The size of the second limiting block is larger than the inner diameter of the guide section. When the mounting cylinder completely sends the rupture disc into the sealing section, the second limiting block abuts against the guide section.

[0020] According to the present invention, a method for assembling a ruptured disc is also provided, using the ruptured disc assembly fixture provided by the present invention, comprising the following steps:

[0021] With the guide section of the outer cylinder facing down, place the rupture disc on top of the feeding cylinder, and use the feeding cylinder to feed part of the thickness of the rupture disc into the sealing section of the outer cylinder.

[0022] Invert the outer cylinder and the feed cylinder, and then remove the feed cylinder;

[0023] The mounting cylinder is inserted into the outer cylinder to axially compress the rupture disc, thereby pushing the rupture disc completely into the sealing section and completing the assembly.

[0024] Compared with the prior art, the advantages of this application are as follows.

[0025] This invention enables long-stroke assembly of the fracturing disc within the outer cylinder of a downhole tool, and prevents the fracturing disc from colliding with the inner wall of the outer cylinder during assembly, thereby effectively protecting the fracturing disc and preventing damage during installation.

[0026] This invention eliminates the need for a protective sleeve to wrap the rupture disc. On the one hand, it avoids the influence of the protective sleeve on the coaxiality of the rupture disc. On the other hand, it preserves the light transmittance of the rupture disc. After the rupture disc is assembled, it can be directly observed to check whether the rupture disc is installed correctly and whether there are any small rubber fragments that have been sheared, thereby checking whether the seal is intact. Attached Figure Description

[0027] The invention will now be described with reference to the accompanying drawings.

[0028] Figure 1 A schematic diagram of the structure of a delivery cylinder of a rupture disc assembly tooling according to the present invention is shown;

[0029] Figure 2A schematic diagram of the mounting cylinder of a rupture disc assembly tooling according to an embodiment of the present invention is shown;

[0030] Figure 3 A schematic diagram of the structure of an embodiment of the outer cylinder of a downhole tool for assembling a fractured disk according to the present invention is shown;

[0031] Figure 4 A schematic diagram showing a feeding cylinder of the rupture disc assembly tooling according to the present invention feeds the rupture disc into the outer cylinder;

[0032] Figure 5 A schematic diagram shows the installation cylinder of the rupture disc assembly tooling according to the present invention fully feeding the rupture disc into the outer cylinder.

[0033] In the picture:

[0034] 1. Outer cylinder; 11. Sealing section; 12. Guide section; 13. Second guide slope; 14. Internal thread; 15. Sealing ring; 16. Abutment section;

[0035] 2. Feeding tube; 21. Feeding head; 22. Positioning ring; 23. First guide ramp; 24. First limit block; 25. Positioning platform;

[0036] 3. Mounting cylinder; 31. External thread; 32. Second limit block;

[0037] 4. Ruptured disc;

[0038] 100. Assembly fixture for ruptured discs.

[0039] In this application, all drawings are schematic and are used only to illustrate the principles of the invention, and are not drawn to scale. Detailed Implementation

[0040] The invention will now be described with reference to the accompanying drawings.

[0041] It should be noted that the directional terms or qualifiers such as "upper" and "lower" used in this application refer to the accompanying drawings. They are not used to define the absolute position of the components involved, but can vary depending on the specific circumstances.

[0042] Figure 1 and Figure 2 The structures of the delivery cylinder 2 and the mounting cylinder 3 of the fracture disk assembly tool 100 according to the present invention are shown respectively. That is, the fracture disk assembly tool 100 of the present invention includes a delivery cylinder 2 and a mounting cylinder 3. The two parts, delivery cylinder 2 and mounting cylinder 3, cooperate with each other to assemble the fracture disk 4 into the outer cylinder 1 of the required downhole tool.

[0043] Using the fracture disc assembly fixture 100 of the present invention, the fracture disc 4 can be installed and placed over long distances without the need for a protective sleeve, allowing the fracture disc 4 to be installed at any depth within the outer casing 1 of the downhole tool. Furthermore, it prevents the fracture disc 4 from colliding during installation, thus satisfying the assembly performance requirements of the fracture disc 4.

[0044] It is easy to understand that the position for installing the rupture disc 4 needs to be pre-designed on the outer cylinder 1. This invention... Figures 1-5 The axial length of each part of the rupture disc assembly fixture 100 shown can be extended according to the actual situation.

[0045] Figure 3 The structure of the outer cylinder 1 of a downhole tool that requires the use of the fracture disk assembly fixture 100 of the present invention for assembling the fracture disk 4 is shown. For example... Figure 3 As shown, the outer cylinder 1 includes a sealing section 11 and a guide section 12 arranged coaxially. The inner diameter of the guide section 12 is larger than the inner diameter of the sealing section 11. The guide section 12 is located at the end of the outer cylinder 1, and the sealing section 11 is located inside the outer cylinder 1.

[0046] During the assembly process, the rupture disc 4 enters from the guide section 12 and moves axially along the guide section 12 until it enters the sealing section 11 and completes the sealing assembly with the sealing section 11.

[0047] Specifically, the rupture disc assembly fixture 100 of the present invention includes a feeding cylinder 2 and an mounting cylinder 3. The feeding cylinder 2 is configured to move coaxially within the guide section 12, and the feeding cylinder 2 feeds at least a portion of the thickness of the rupture disc 4 into the sealing section 11. The mounting cylinder 3 is configured to move coaxially within the guide section 12, and the mounting cylinder 3 completely feeds the rupture disc into the sealing section 11, thereby sealing the rupture disc with the sealing section 11.

[0048] According to the present invention, the structure of the dispensing tube 2 is as follows: Figure 1 As shown, a feeding head 21 is coaxially mounted on the upper end of the feeding cylinder 2, combined with... Figure 4 As shown, the outer wall of the dispensing head 21 and the inner wall of the guide section 12 form a sliding guide. That is, after the dispensing head 21 of the dispensing cylinder 2 enters the guide section 12, under the guiding action of the dispensing head 21 and the guide section 12, the central axis of the dispensing cylinder 2 always coincides with the central axis of the guide section 12.

[0049] In a preferred embodiment, the dimensions of the outer wall of the dispensing head 21 and the inner wall of the guide section 12 can be determined according to the design tolerance of the H8 / f7 mating surface.

[0050] The inner diameter of the feeding head 21 is smaller than the outer diameter of the rupture disc 4, such as Figure 4 As shown, the rupture disc 4 can be placed on the upper end of the feeding head 21 and enter the outer cylinder 1 under the push of the feeding head 21.

[0051] A positioning ring 22 for positioning the rupture disc 4 is coaxially disposed at the upper end of the feeding head 21. After the rupture disc 4 is placed on the feeding head 21, the positioning ring 22 positions the rupture disc 4 so that the central axis of the rupture disc 22 coincides with the central axis of the feeding head 21.

[0052] In a preferred embodiment, the inner diameter of the positioning ring 22 is slightly larger than the outer diameter of the rupture disc 4. After the rupture disc 4 is coaxially placed inside the positioning ring 22, the gap between the rupture disc 4 and the positioning ring 22 is 0.15 to 0.25 mm, which can ensure positioning accuracy and facilitate the placement of the rupture disc 4 inside the positioning ring 22.

[0053] According to the present invention, such as Figure 4 As shown, the height of the positioning ring 22 is less than the thickness of the rupture disc 4. When the upper end of the positioning ring 22 axially abuts against the sealing section 11, part of the thickness of the rupture disc 4 has already entered the sealing section 11.

[0054] In a preferred embodiment, such as Figure 1 As shown, a positioning platform 25 is provided at the top of the feeding head 21. The outer diameter of the positioning platform 25 is smaller than the inner diameter of the positioning ring 22. The upper end face of the positioning platform 25 is precision machined to contact the end face of the rupture disc 4, protecting the end face of the rupture disc 4 and preventing the rupture disc 4 from tilting, thereby ensuring that the rupture disc 4 can be assembled into the sealing section 11 in the correct posture. The size of the positioning platform 25 is smaller than the size of the feeding head 21, thereby reducing the end face area that needs to be precision machined.

[0055] In a preferred embodiment, a first guide slope 23 is provided on the outer wall of the positioning ring 22, that is, the outer wall of the positioning ring 22 is set as a cone with its size gradually decreasing from bottom to top. With this setting, the first guide slope 23 of the positioning ring 22 can play a guiding role in the process of the delivery cylinder 2 entering the outer cylinder 1, so that the delivery cylinder 2 can enter the outer cylinder 1 more smoothly.

[0056] According to the present invention, such as Figure 3 As shown, a second guide slope 13 is provided at the connection between the inner wall of the sealing section 11 and the guide section 12. Combined with... Figure 4 As shown, the second guide slope 13 changes the original horizontal end face of the sealing section 11 into a slope. Specifically, the second guide slope 13 can be configured as a conical surface, a circular arc conical surface, or a combination of a conical surface and a circular arc conical surface. The circular arc conical surface gradually transitions the guide section 12 to the sealing section 11. During the process of the rupture disc 4 being pushed into the outer cylinder 1 by the delivery cylinder 2, when the upper end of the rupture disc 4 passes through the second guide slope 13, it can slowly enter the sealing section 11 under the correcting and guiding effect of the second guide slope 13, preventing the upper end of the rupture disc 4 from colliding with the end face of the sealing section 11.

[0057] In a preferred embodiment, the tilt angle of the second guide slope 13 is greater than or equal to the tilt angle of the first guide slope 23.

[0058] In another preferred embodiment, the second guide slope 13 is configured as an arc-shaped surface, and the arc-shaped surface protrudes in the direction of the central axis of the outer cylinder 1.

[0059] According to the present invention, a first limiting block 24 is provided on the outer wall of the dispensing cylinder 2, and the size of the first limiting block 24 is larger than the inner diameter of the guide section 12. Figure 4 As shown, when the upper end of the positioning ring 22 axially abuts against the inner wall of the outer cylinder 1, part of the thickness of the rupture disc 4 has entered the sealing section 11, and the first limiting block 24 axially abuts against the end of the guide section 12, thereby preventing the upper end of the positioning ring 22 from being damaged due to excessive compression against the inner wall of the outer cylinder 1.

[0060] In one specific embodiment, a sealing ring 15 is provided in the sealing section 11. When the rupture disc 4 enters the sealing section 11, the sealing ring 15 is located between the outer wall of the rupture disc 4 and the inner wall of the sealing section 11, thereby achieving a seal.

[0061] In a preferred embodiment, the distance from the connection point of the sealing section 11 and the guide section 12 to the sealing ring 15 is greater than or equal to the thickness of the rupture disc 4. Specifically, in Figure 5 In the middle, the distance from the lower end of the second guide slope 13 (i.e. the connection position between the second guide slope 13 and the sealing section 11) to the sealing ring 15 is greater than or equal to the thickness of the rupture disc 4.

[0062] In this configuration, as the rupture disc 4 gradually extends into the sealing section 11 under the squeezing action of the mounting cylinder 3, when the lower end of the rupture disc 4 begins to abut against the sealing ring 15, the overall thickness of the rupture disc 4 is already fully embedded in the sealing section 11.

[0063] Since the edge of the rupture disc 4 is often a stress-concentrated and relatively fragile area, when the rupture disc 4 and the sealing ring 15 come into contact, the entire rupture disc 4 is completely embedded in the sealing section 11, which can prevent the rupture disc 4 from chipping or other phenomena during the pressing process, and ensure that the rupture disc 4 passes smoothly through the sealing ring 15.

[0064] According to the present invention, such as Figure 2 , Figure 3 and Figure 5 As shown, an external thread 31 is provided on the outer wall of the mounting cylinder 3, and an internal thread 14 is provided on the inner wall of the guide section 12. After the mounting cylinder 3 and the guide section 12 are threaded together, the mounting cylinder 3 can rotate relative to the guide section 12, which allows the mounting cylinder 3 to move into the guide section 12, thereby squeezing the rupture disc and allowing the rupture disc to completely enter the sealing section 11, thereby forming a seal between the rupture disc and the sealing section 11.

[0065] In a preferred embodiment, a second limiting block 32 is provided on the outer wall of the mounting cylinder 3. The size of the second limiting block 32 is larger than the inner diameter of the guide section 12. When the mounting cylinder 3 completely inserts the rupture disc into the sealing section 11, the second limiting block 32 abuts against the guide section 12. At the same time, the internal thread 14 is provided at the end of the guide section 12 away from the sealing section 11, and the external thread 31 is provided at the position of the mounting cylinder 3 near the second limiting block 32.

[0066] According to the present invention, a method for assembling a ruptured disc is also provided, comprising the following steps:

[0067] according to Figure 4 As shown, with the guide section 12 of the outer cylinder 1 facing downwards, the rupture disc is placed on top of the feeding cylinder 2, and the feeding cylinder 2 is used to feed part of the thickness of the rupture disc into the sealing section 11 of the outer cylinder 1.

[0068] according to Figure 5 As shown, invert the outer cylinder 1 and the feed cylinder 2, and then remove the feed cylinder 2;

[0069] Insert the mounting cylinder 3 into the outer cylinder 1 to axially compress the rupture disc, thereby pushing the rupture disc completely into the sealing section 11 and completing the assembly.

[0070] In one specific embodiment, preparatory work is required before assembling the rupture disc 4.

[0071] In this embodiment, the sealing ring 15 is an O-ring. First, the sealing ring 15 is installed into the sealing section 11 of the outer cylinder 1 and lubricating oil or grease is applied. The rupture disc 4 is placed in the feeding head 21 of the feeding cylinder 2 and positioned by the positioning ring 22. Lubricating oil or grease is applied to the edges, chamfered surfaces, and corners of the rupture disc 4 that protrude from the feeding cylinder 2. These parts of some rupture disc products are relatively rough. Applying lubricating oil or grease reduces the coefficient of friction and can prevent local shearing and damage to the sealing ring 15 during assembly, thereby effectively protecting the sealing ring 15.

[0072] After the preparations are complete, place the outer cylinder 1 according to... Figure 4 The vertical orientation shown eliminates the eccentricity and tilting of the rupture disc 4 under gravity in a horizontal state, ensuring that the rupture disc 4 is neither eccentric nor tilted, thus allowing it to enter the sealing section 11 more smoothly. Furthermore, in this invention, the gap between the rupture disc 4 and the positioning ring 22, along with the guiding cooperation between the feed head 21 and the guide section 12, allows the rupture disc 4 to move within a limited space, facilitating its alignment and automatic centering.

[0073] The assembly process requires a flat surface. During the insertion process, the upper end face and outer circular surface of the outer cylinder 1 can be gently tapped with a hammer to align the cylinder with these reference surfaces, so that the feeding cylinder 2 can be quickly inserted into the outer cylinder 1 until the lower end face of the outer cylinder 1 abuts against the first limiting block 24 of the feeding cylinder 2, indicating that the feeding cylinder 2 has placed the rupture disc 4 into place.

[0074] After the feeding and discharging cylinder 2 delivers the rupture disc 4 into place, the outer cylinder 1 and the feeding and discharging cylinder 2 are flipped over. During the flipping process, the feeding and discharging cylinder 2 is prevented from moving axially relative to the outer cylinder 1.

[0075] After the flipping is complete, remove the feeding tube 2 and insert the installation tube 3 into the outer tube 1, as follows. Figure 5 As shown.

[0076] When the external thread 31 of the mounting cylinder 3 contacts the internal thread 14 of the outer cylinder 1, continue to rotate the mounting cylinder 3. Under the action of the thread, the rupture disc 4 is squeezed until the second limiting block 32 of the mounting cylinder 3 abuts against the upper end face of the outer cylinder 1, indicating that the rupture disc 4 has been installed in place.

[0077] In a preferred embodiment, the outer cylinder 1 further includes an abutment section 16, which is coaxially disposed at the end of the sealing section 11 away from the guide section 12, and the inner diameter of the abutment section 16 is smaller than the inner diameter of the sealing section 11. After the mounting cylinder 3 installs the rupture disc 4 into place, the end face of the rupture disc 4 abuts axially with the abutment section 16.

[0078] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0079] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0081] Finally, it should be noted that the above are merely preferred embodiments of the present invention and do not constitute any limitation on the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fracturing disc assembly tooling for assembling a fracturing disc into the outer cylinder of a downhole tool, characterized in that, The outer cylinder (1) comprises a sealing section (11) and a guiding section (12) arranged coaxially, the inner diameter of the guiding section (12) is larger than that of the sealing section (11), and the rupture disc assembling tool further comprises: A broadcasting cylinder (2) arranged coaxially movable in the guiding section (12), the broadcasting cylinder (2) sends at least part of the thickness of the rupture disc into the sealing section (11), a broadcasting head (21) is arranged at the upper end of the broadcasting cylinder (2), the outer wall of the broadcasting head (21) forms a sliding guide with the inner wall of the guiding section (12), the inner diameter of the broadcasting head (21) is smaller than the outer diameter of the rupture disc, a positioning ring (22) for positioning the rupture disc is arranged at the upper end of the broadcasting head (21), the inner diameter of the positioning ring (22) is larger than the outer diameter of the rupture disc (4), and the gap between the rupture disc and the positioning ring is 0.15-0.25mm; An installation cylinder (3) arranged coaxially movable in the guiding section (12), the installation cylinder (3) sends the rupture disc completely into the sealing section (11), so that the rupture disc is sealed with the sealing section (11).

2. The rupture disc assembly tool of claim 1, wherein, The height of the positioning ring (22) is smaller than the thickness of the rupture disc.

3. The rupture disc assembly tool of claim 2, wherein, A first guide inclined surface (23) is arranged on the outer wall of the positioning ring (22).

4. The rupture disc assembly tool of claim 3, wherein, A second guide inclined surface (13) is arranged at the connecting part of the inner wall of the sealing section (11) and the guiding section (12), and the inclination angle of the second guide inclined surface (13) is greater than or equal to that of the first guide inclined surface (23).

5. The rupture disc assembly tool of claim 1, wherein, A first limiting block (24) is arranged on the outer wall of the broadcasting cylinder (2), the size of the first limiting block (24) is larger than the inner diameter of the guiding section (12), when the end of the positioning ring (22) axially abuts against the inner wall of the outer cylinder (1), the first limiting block (24) axially abuts against the end of the guiding section (12).

6. The rupture disc assembly tool of claim 1, wherein, A sealing ring (15) is arranged in the sealing section (11), and the distance from the connecting point of the sealing section (11) and the guiding section (12) to the sealing ring (15) is greater than or equal to the thickness of the rupture disc.

7. The rupture disc assembly tool of claim 1, wherein, An external thread (31) is arranged on the outer wall of the installation cylinder (3), an internal thread (14) is arranged on the inner wall of the guiding section (12), after the installation cylinder (3) is screwed with the guiding section (12), the installation cylinder (3) is rotated relative to the guiding section (12), so that the installation cylinder (3) is moved into the guiding section (12), thereby extruding the rupture disc, making the rupture disc enter the sealing section (11), and further making the rupture disc form a seal with the sealing section (11).

8. The rupture disc assembly tool of claim 1, wherein, A second limiting block (32) is arranged on the outer wall of the installation cylinder (3), the size of the second limiting block (32) is larger than the inner diameter of the guiding section (12), when the installation cylinder (3) completely sends the rupture disc into the sealing section (11), the second limiting block (32) abuts against the guiding section (12).

9. A rupture disc assembly method characterized by, The rupture disc assembly tool according to any one of claims 1-8, comprising the following steps: The guide section (12) of the outer cylinder (1) is directed downward, the rupture disc is placed on the top of the broadcasting cylinder (2), and the broadcasting cylinder (2) is used to send part of the thickness of the rupture disc into the sealing section (11) of the outer cylinder (1); The outer cylinder (1) and the broadcasting cylinder (2) are inverted, and then the broadcasting cylinder (2) is removed; The installation cylinder (3) is inserted into the outer cylinder (1), the rupture disc is axially extruded, so that the rupture disc is completely pushed into the sealing section (11), and the assembly is completed.

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