Riser joint connection structure and riser module

Abstract

This invention belongs to the field of marine engineering equipment technology, and relates to a riser connector connection structure and riser module. The riser connector connection structure includes a wedge block, a wedge groove, and an inlet groove. The wedge groove and the inlet groove are connected, and their connection has a stepped structure. When the wedge block is inserted axially into the inlet groove, the male and female connectors rotate relative to each other, allowing the wedge block to rotate into the corresponding wedge groove through the stepped structure. The wedge groove restricts the axial and radial movement of the wedge block, and the wedge groove, in conjunction with the stepped structure, restricts the circumferential movement of the wedge block. The technical solution provided by this riser connector connection structure and riser module, on the one hand, can improve the pressure resistance and reliability of the connection between two risers to a certain extent, while also achieving lightweighting of the riser connector connection structure; on the other hand, it simplifies the detachable operation method between the two pipe fittings and significantly reduces maintenance and upkeep costs.

Description

Technical Field

[0001] This invention relates to the field of marine engineering equipment technology, and in particular to a riser joint connection structure and riser module. Background Technology

[0002] Riser modules are typically composed of multiple pipe fittings connected by joints, and are a crucial yet vulnerable link in marine engineering fields such as deep-sea mining and oil and gas drilling. A riser module usually includes a main pipe and several parallel auxiliary pipes with smaller diameters. These auxiliary pipes are usually symmetrically distributed outside the main pipe and are used to transport fluids or transmit control signals.

[0003] Currently, common riser connection methods include traditional bolt flange connectors and deep-sea riser quick connectors. While these methods can improve operational efficiency, they struggle to balance pressure resistance and lightweight requirements when dealing with high pressure, high load, and high fatigue loads in the deep sea. Furthermore, the disassembly and maintenance of auxiliary pipelines are not flexible enough, and manual operation is difficult and costly.

[0004] Therefore, there is an urgent need for a relevant structure that can solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems of existing riser connection structures, which are difficult to balance pressure resistance, lightweight and reliability, as well as the high difficulty of manual disassembly and high maintenance costs.

[0006] To solve the above-mentioned technical problems, the present invention provides a riser joint connection structure, which adopts the following technical solution:

[0007] This riser connector connection structure is used for connecting two risers. Each riser includes several pipe fittings. The connection end of any pipe fitting of one riser is a male connector, and the connection end of a corresponding pipe fitting of the other riser is a female connector. The male connector is inserted into the female connector.

[0008] The riser joint connection structure includes a wedge-shaped block on the outer peripheral wall of the male joint and a wedge-shaped groove and an inlet groove on the inner peripheral wall of the female joint. The inlet groove is arranged axially, and the wedge groove and the inlet groove are connected. The connection between the two has a stepped structure.

[0009] When the wedge block is inserted into the inlet groove along the axial direction, and the wedge block and the corresponding wedge groove are at the same horizontal position, the male connector and the female connector rotate relative to each other, so that the wedge block can pass through the step structure and enter the corresponding wedge groove. The wedge groove can restrict the axial movement and radial movement of the wedge block, and the wedge groove and the step structure can restrict the circumferential movement of the wedge block.

[0010] Optionally, the riser connector connection structure further includes a transition groove provided on the inner peripheral wall of the female connector, and the wedge-shaped groove and the inlet groove are connected through the transition groove;

[0011] When the wedge block is inserted into the inlet groove along the axial direction, and the wedge block and the corresponding wedge groove are at the same horizontal position, the male connector rotates in the first direction or the female connector rotates in the second direction, so that the wedge block can be rotated into the corresponding wedge groove through the transition groove;

[0012] The first direction and the second direction are opposite to each other.

[0013] Optionally, along the direction from the inlet groove to the wedge groove, the depth of the transition groove gradually becomes shallower, so that the connection between the transition groove and the wedge groove forms the stepped structure.

[0014] Optionally, the end face of the wedge block is provided with a universal ball head, and the wedge groove is provided with a positioning groove;

[0015] When the wedge block moves within the inlet groove and / or the transition groove, the universal ball joint abuts against the bottom of the inlet groove and / or the bottom of the transition groove, and the universal ball joint is recessed into the wedge block so that the male connector can move smoothly within the inlet groove and / or the transition groove.

[0016] When the wedge block rotates into the wedge groove, the universal ball head pops out and engages with the positioning groove.

[0017] Optionally, a plurality of wedge blocks, wedge grooves, and transition grooves are provided, with the plurality of wedge blocks and wedge grooves arranged at intervals in a corresponding manner along the circumferential direction, and each wedge groove communicating with the inlet groove through the corresponding transition groove.

[0018] Optionally, a plurality of wedge blocks and a plurality of wedge grooves are provided, and the plurality of wedge blocks and the plurality of wedge grooves are arranged at intervals corresponding to each other along the axial direction.

[0019] Optionally, the riser connector connection structure includes a guide cone surface and a guide cone groove that mates with the guide cone surface. The guide cone surface is located on the outer peripheral wall of the male connector, and the guide cone groove is located inside the female connector.

[0020] Optionally, the riser connector connection structure includes a first hook provided on the outer peripheral wall of the male connector and a second hook provided on the outer peripheral wall of the female connector;

[0021] The male connector and the female connector rotate relative to each other so that the first hook and the second hook can engage.

[0022] Optionally, a plurality of the first hook and the second hook are provided, and the plurality of the first hook and the plurality of the second hook are arranged at intervals corresponding to each other in the circumferential direction.

[0023] To address the aforementioned technical problems, this invention also provides a riser module, employing the following technical solution:

[0024] The riser module includes several risers and the riser connector connection structure described above, and each riser includes several pipe fittings;

[0025] In two connected risers, any of the pipe fittings of one riser is connected to a corresponding pipe fitting of the other riser through the riser joint connection structure.

[0026] Compared with the prior art, the riser connector connection structure and riser module provided by the present invention have the following advantages:

[0027] This riser connector connection structure is used to connect two risers. The connection end of any fitting on one riser is designated as a male connector, and the corresponding connection end of a fitting on the other riser is designated as a female connector. The male connector is inserted into the female connector. The riser connector connection structure is located at the connection point of the male and female connectors. The riser connector connection structure includes a wedge-shaped block on the outer peripheral wall of the male connector and wedge-shaped grooves and inlet grooves on the inner peripheral wall of the female connector. The connection point between the two has a stepped structure.

[0028] When the wedge block is inserted axially into the inlet groove until the wedge block and the corresponding wedge groove are at the same horizontal position, the male and female connectors rotate relative to each other, allowing the wedge block to pass through the step structure and enter the corresponding wedge groove. The wedge groove can restrict the axial and radial movement of the wedge block, and the wedge groove and the step structure can restrict the circumferential movement of the wedge block. Thus, the male and female connectors are fixedly connected, that is, the two pipe fittings are fixedly connected.

[0029] When a sufficiently large external force is applied to the male and female connectors in opposite directions, the wedge block can overcome the limitations of the stepped structure and rotate out of the wedge groove. At this time, the male and female connectors can rotate in opposite directions until the wedge block enters the inlet groove and then comes out of the inlet groove, so as to release the connection between the male and female connectors, that is, the two pipe fittings can be disassembled from each other.

[0030] On the one hand, the pipe fittings connected to the two risers are fixedly connected through their respective riser joint connection structures. Moreover, the ocean currents are not powerful enough for the wedge blocks to overcome the limitations of the wedge structure fit and the stepped structure, which can effectively prevent the wedge blocks from coming out of the wedge groove. This improves the pressure resistance and reliability of the connection between the two risers to a certain extent. Furthermore, since the riser joint connection structure is set at the connection between the male and female joints of the connected pipe fittings, the volume and weight of the riser joint connection structure are greatly optimized, making the riser joint connection structure lightweight.

[0031] On the other hand, the relative rotation of the corresponding pipe fittings of the two risers causes the wedge block to rotate into the wedge groove through the inlet groove. The wedge groove itself, and its cooperation with the stepped structure, allows for a fixed connection between the male and female fittings, thus achieving a fixed connection between the two pipe fittings. Furthermore, applying a sufficiently large external force to the corresponding pipe fittings of the two risers in opposite directions allows the wedge block to overcome the restriction of the stepped structure and rotate out of the wedge groove, thereby releasing the connection between the male and female fittings, allowing the two pipe fittings to be disassembled. In other words, the riser joint connection structure simplifies the disassembly process by switching between a self-locking state and an unlocking state through the relative rotation of the male and female fittings, effectively reducing the difficulty of manual operation and significantly lowering maintenance costs. Attached Figure Description

[0032] To more clearly illustrate the solutions in this invention, a brief introduction to the accompanying drawings used in the description of the embodiments will be provided below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort. Wherein:

[0033] Figure 1 This is a front view of the riser module in one embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A magnified view of part A of the neutral tube module;

[0035] Figure 3 yes Figure 1 A magnified view of part B of the neutral tube module.

[0036] The labels in the attached diagram are as follows:

[0037] 200. Riser module; 210. Riser; 211. Pipe fitting; 211a. Main pipe; 211b. Auxiliary pipeline; 201. Male connector; 202. Female connector;

[0038] 100. Riser joint connection structure; 11. Wedge block; 12. Wedge groove; 13. Transition groove; 14. Inlet groove; 21. Guide cone surface; 22. Guide cone groove; 31. First hook; 32. Second hook; 33. Fastener; 40. Sealing ring. Detailed Implementation

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as “length,” “width,” “upper,” “lower,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate orientations or positions based on the orientations or positions shown in the accompanying drawings and are for ease of description only, and should not be construed as limiting the technical solution.

[0040] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion; the terms "first," "second," etc., used in the specification, claims, and accompanying drawings are used to distinguish different objects, not to describe a particular order. "A plurality of" means two or more, unless otherwise explicitly specified.

[0041] In the description and claims of this invention and the foregoing drawings, when an element is referred to as "fixed to," "mounted to," "disposed on," or "connected to" another element, it can be located directly or indirectly on that other element. For example, when an element is referred to as "connected to" another element, it can be directly or indirectly connected to that other element.

[0042] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] It should be noted that the riser joint connection structure 100 is mainly used in marine engineering scenarios such as deep-sea mining and oil and gas drilling.

[0044] This invention provides a riser connector connection structure 100, such as... Figure 1 and Figure 2As shown, the riser joint connection structure 100 is used for the connection between two risers 210. Each riser 210 includes a number of pipe fittings 211. Each pipe fitting 211 of each riser 210 can be set one-to-one with each pipe fitting 211 of the connected riser 210, and the corresponding pipe fittings 211 are connected.

[0045] The connection end of any fitting 211 of one riser 210 can be set as a male connector 201, and the connection end of the corresponding fitting 211 of another riser 210 can be set as a female connector 202. The male connector 201 can be inserted into the female connector 202. The riser connector connection structure 100 can be set at the connection between the male connector 201 and the female connector 202. That is, the volume and weight of the riser connector connection structure 100 are greatly optimized, making the riser connector connection structure 100 lightweight.

[0046] Furthermore, since the pipe fittings 211 connected to each of the two risers 210 are fixedly connected through the corresponding riser joint connection structure 100, the pressure resistance and reliability of the connection between the two risers 210 are improved to a certain extent.

[0047] In addition, the two pipe fittings 211 are connected in a detachable manner by controlling the riser joint connection structure 100 to switch between a self-locking state and an unlocking state through relative rotation.

[0048] Specifically, the riser connector connection structure 100 includes a wedge block 11, a wedge groove 12, and an inlet groove 14. The wedge block 11 can be disposed on the outer peripheral wall of the male connector 201, and the wedge groove 12 and the inlet groove 14 can both be disposed on the inner peripheral wall of the female connector 202. The inlet groove 14 can be arranged axially, and the wedge groove 12 and the inlet groove 14 can be connected. The connection between the two can have a stepped structure.

[0049] Understandably, the working principle of the riser joint connection structure 100 is roughly as follows:

[0050] Understandably, if a fixed connection between the male connector 201 and the female connector 202 is required, the wedge block 11 can be inserted axially into the inlet groove 14. When the wedge block 11 moves axially until it is at the same horizontal position as the corresponding wedge groove 12, the male connector 201 can rotate relative to the female connector 202, allowing the wedge block 11 to pass through the stepped structure and enter the corresponding wedge groove 12, thus completing the fixed connection between the male connector 201 and the female connector 202. That is, the cooperation of the wedge block 11 and the wedge groove 12 restricts the axial and radial movement of the male connector 201 and the female connector 202. Simultaneously, since both the wedge block 11 and the wedge groove 12 are wedge-shaped structures and cooperate with the stepped structure to restrict the relative rotation of the male connector 201 and the female connector 202, a fixed connection between the two pipe fittings 211 is achieved.

[0051] If it is necessary to release the fixed connection between the male connector 201 and the female connector 202: when a sufficiently large external force is applied to the male connector 201 and the female connector 202 in opposite directions, the wedge block 11 can overcome the limitation of the stepped structure and rotate out of the wedge groove 12. At this time, the male connector 201 and the female connector 202 can rotate in opposite directions until the wedge block 11 rotates into the inlet groove 14 and then comes out of the inlet groove 14, so as to release the connection between the male connector 201 and the female connector 202, that is, the two pipe fittings 211 can be disassembled from each other.

[0052] In summary, compared with existing technologies, this riser joint connection structure 100 has at least the following beneficial effects:

[0053] The riser joint connection structure 100 is used to connect two risers 210. On the one hand, the corresponding pipe fittings 211 of the two risers 210 are fixedly connected through their respective riser joint connection structures 100. Moreover, the ocean current power is insufficient to allow the wedge block 11 to overcome the limitations of the wedge structure fit and the step structure, which can effectively prevent the wedge block 11 from coming out of the wedge groove 12. This improves the pressure resistance and reliability of the connection between the two risers 210 to a certain extent. Furthermore, since the riser joint connection structure 100 is set at the connection between the male connector 201 and the female connector 202 of the connected pipe fittings 211, the volume and weight of the riser joint connection structure 100 are greatly optimized, making the riser joint connection structure 100 lightweight.

[0054] On the other hand, the relative rotation of the corresponding pipe fittings 211 of the two risers 210 causes the wedge block 11 to rotate into the wedge groove 12 via the inlet groove 14. The wedge groove 12 itself and the wedge groove 12 cooperate with the step structure to fix the male connector 201 and the female connector 202, thus achieving a fixed connection between the two pipe fittings 211. Furthermore, applying a sufficiently large external force to the corresponding pipe fittings 211 of the two risers in opposite directions allows the wedge block 11 to overcome the restriction of the step structure and rotate out of the wedge groove 12, thereby releasing the connection between the male connector 201 and the female connector 202, allowing the two pipe fittings 211 to be disassembled. In other words, the riser connector connection structure 100 simplifies the disassembly operation of the two pipe fittings 211 by switching between a self-locking state and an unlocking state through the relative rotation of the male connector 201 and the female connector 202, effectively reducing the difficulty of manual operation and also significantly reducing maintenance costs.

[0055] To enable those skilled in the art to better understand the present invention, the following will be described in conjunction with the appendix. Figures 1 to 3 The technical solutions in the embodiments of the present invention will be clearly and completely described.

[0056] In some embodiments, such as Figure 1 and Figure 2 As shown, the riser connector connection structure 100 also includes a transition groove 13, which can be provided on the inner peripheral wall of the female connector 202. The wedge groove 12 and the inlet groove 14 can be connected through the transition groove 13.

[0057] Understandably, if it is necessary to fix the male connector 201 and the female connector 202, the wedge block 11 can be inserted into the inlet groove 14 along the axial direction first. When the wedge block 11 moves along the axial direction to the same horizontal position as the corresponding wedge groove 12, the male connector 201 can be rotated in the first direction or the female connector 202 can be rotated in the second direction so that the wedge block 11 can be rotated into the corresponding wedge groove 12 through the transition groove 13, thus completing the fixed connection between the male connector 201 and the female connector 202.

[0058] If it is necessary to release the fixed connection between the male connector 201 and the female connector 202, the male connector 201 can be rotated in the second direction or the female connector 202 can be rotated in the first direction, so that the wedge block 11 can be rotated out of the wedge groove 12 and moved into the inlet groove 14 via the transition groove 13, and then moved axially until the wedge block 11 can be dislodged from the inlet groove 14, thus completing the release of the fixed connection between the male connector 201 and the female connector 202.

[0059] The first and second directions are opposite in direction. Specifically, the first direction is clockwise, and the second direction is counterclockwise. The reverse is also possible.

[0060] In some embodiments, the depth of the transition groove 13 may gradually decrease along the direction from the inlet groove 14 to the wedge groove 12, so that a step is formed at the connection between the transition groove 13 and the wedge groove 12, i.e., a stepped structure. Understandably, after the wedge block 11 rotates into the wedge groove 12, if it needs to rotate out of the wedge groove 12 in the opposite direction, due to the step at the connection between the transition groove 13 and the wedge groove 12, a very large torque is required for the wedge block 11 to overcome the step and rotate from the wedge groove 12 into the transition groove 13. Therefore, this structure can further restrict the circumferential movement of the male connector 201 and the female connector 202, effectively improving the reliability and stability of the fixed connection between the male connector 201 and the female connector 202.

[0061] In some embodiments, after the male connector 201 and the female connector 202 are fixedly connected, anti-reverse pins can be provided on both to further prevent the wedge block 11 from overcoming the fit of the wedge structure and the step structure and rotating out of the wedge groove 12, so as to increase the stability of the riser connector connection structure 100 when it is in the locked state.

[0062] In some embodiments, a universal ball joint (not shown in the figure) may be provided on the end face of the wedge block 11, and a positioning groove (not shown in the figure) may be provided in the wedge groove 12.

[0063] When the wedge block 11 moves within the inlet groove 14, the universal ball joint abuts against the bottom of the inlet groove 14, and the universal ball joint recesses into the wedge block 11, so that the male connector can move smoothly within the inlet groove 14. The working principle of the universal ball joint is the same when the wedge block 11 moves within the transition groove 13, and will not be described again here.

[0064] When the wedge block 11 rotates into the wedge groove 12, the universal ball head can pop out and engage with the positioning groove to further restrict the axial and circumferential movement of the male connector 201 and the female connector 202.

[0065] In some embodiments, such as Figure 2 As shown, several wedge blocks 11 can be provided, and these wedge blocks 11 can be spaced apart circumferentially on the outer peripheral wall of the male connector 201. Correspondingly, several wedge grooves 12 and transition grooves 13 can also be provided, and these wedge grooves 12 and transition grooves 13 can be spaced apart circumferentially on the inner peripheral wall of the female connector 202. The wedge blocks 11 and wedge grooves 12 can be spaced apart circumferentially, and each wedge groove 12 can be connected to the inlet groove 14 through the corresponding transition groove 13. This arrangement can improve the stability of the connection between the two pipe fittings 211.

[0066] In some embodiments, such as Figure 2 As shown, a number of wedge blocks 11 and wedge grooves 12 can be provided. The number of wedge blocks 11 and wedge grooves 12 can be arranged in a corresponding interval along the axial direction to improve the connection strength between the two pipe fittings 211.

[0067] In some embodiments, such as Figure 2 and Figure 3 As shown, a sealing ring 40 may be provided at the mating point of the male connector 201 and the female connector 202 to improve the leakage prevention capability of the connection between the male connector 201 and the female connector 202.

[0068] In some embodiments, such as Figure 3 As shown, the riser connector connection structure 100 also includes a guide cone surface 21 and a guide cone groove 22 that mates with the guide cone surface 21, so as to play a guiding role when the male connector 201 is inserted into the female connector 202, so that the male connector 201 and the female connector 202 are properly inserted and mated.

[0069] The guide cone surface 21 can be provided on the outer peripheral wall of the male connector 201, that is, at least part of the outer peripheral wall of the male connector 201 is a cone surface; the guide cone groove 22 can be provided in the female connector 202, that is, at least part of the inner peripheral wall of the female connector 202 is a cone groove structure.

[0070] In some embodiments, such as Figure 3As shown, the riser connector connection structure 100 also includes a first hook 31 and a second hook 32. The first hook 31 can be provided on the outer peripheral wall of the male connector 201, and the second hook 32 can be provided on the outer peripheral wall of the female connector 202.

[0071] Understandably, by rotating the male connector 201 and the female connector 202 relative to each other, the first hook 31 and the second hook 32 can be engaged, so as to provide additional connection points and mounting points between the two pipe fittings 211.

[0072] In some embodiments, such as Figure 3 As shown, there can be a number of first hooks 31 and second hooks 32. The number of first hooks 31 and the number of second hooks 32 are arranged in a corresponding interval along the circumference to improve the pressure resistance and stability of the additional connection points and installation points between the two pipe fittings 211.

[0073] In some embodiments, such as Figure 3 As shown, a fastener 33 can be inserted axially at the mating point of the first hook 31 and the second hook 32 to further enhance the connection stability of the first hook 31 and the second hook 32. The fastener 33 can be a screw, rivet, etc.

[0074] Specifically in this embodiment, such as Figures 1 to 3 As shown, the riser 210 has several fittings 211, which can be a main pipe 211a and several auxiliary pipes 211b, and the several auxiliary pipes 211b can be arranged around the main pipe 211a at intervals.

[0075] Based on this, since the main pipe 211a has a large diameter and the main pipe 211a itself has a certain degree of precision, the main pipes 211a of the two risers 210 can be detachably connected by the cooperation of the wedge block 11 and the wedge groove 12, as well as the cooperation of the guide cone surface 21 at the male connector 201 of one main pipe 211a and the guide cone groove 22 at the female connector 202 of the other main pipe 211a, while ensuring the connection strength and stability between the two main pipes 211a.

[0076] Because the auxiliary pipeline 211b has a smaller diameter and its structural precision is lower than that of the main pipeline 211a, the corresponding auxiliary pipelines 211b of the two risers 210 can be equipped with a first hook 31 and a second hook 32 in addition to the cooperation of the wedge block 11 and the wedge groove 12, the guide cone surface 21 at the male connector 201 of one auxiliary pipeline 211b and the guide cone groove 22 at the female connector 202 of the other auxiliary pipeline 211b. This provides additional connection points and installation points, improves the connection strength and stability between the two corresponding auxiliary pipelines 211b, and enables the auxiliary pipeline 211b to withstand the transportation intensity in its application in the marine oil and gas field.

[0077] Of course, the specific structure of the riser connector connection structure 100 applied to the main pipe 211a of the two risers 210 is not limited to the above method; similarly, the specific structure of the riser connector connection structure 100 applied to the corresponding auxiliary pipelines 211b of the two risers 210 is also not limited to the above method, and can be adjusted according to the actual situation, without restriction here.

[0078] Based on the above-mentioned riser joint connection structure 100, such as Figure 1 and Figure 2 As shown, this embodiment of the invention also provides a riser module 200, which includes a plurality of risers 210 and the riser connector connection structure 100 described above. Each riser 210 includes a plurality of pipe fittings 211.

[0079] In two connected risers 210, any fitting 211 of one riser 210 can be connected to a corresponding fitting 211 of the other riser 210 through the riser connector connection structure 100.

[0080] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of 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 specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A riser joint connection structure, applied to the connection between two risers in marine engineering scenarios such as deep-sea mining and oil and gas drilling, characterized in that, Each of the risers includes a number of pipe fittings. The connection end of any pipe fitting of one riser is a male connector, and the connection end of a corresponding pipe fitting of another riser is a female connector. The male connector is inserted into the female connector. The riser connector connection structure includes a wedge-shaped block on the outer peripheral wall of the male connector and a wedge-shaped groove, a transition groove, and an inlet groove on the inner peripheral wall of the female connector. The inlet groove is arranged axially, and the wedge-shaped groove and the inlet groove are connected through the transition groove. Along the direction from the inlet groove to the wedge-shaped groove, the depth of the transition groove gradually becomes shallower, so that a stepped structure is formed at the connection between the transition groove and the wedge groove. When the wedge block is inserted into the inlet groove along the axial direction until the wedge block and the corresponding wedge groove are at the same horizontal position, the male connector rotates along the first direction or the female connector rotates along the second direction, so that the wedge block can be rotated into the corresponding wedge groove through the transition groove. The wedge groove can restrict the axial movement and radial movement of the wedge block, and the wedge groove and the step structure can restrict the circumferential movement of the wedge block. The first direction and the second direction are opposite to each other.

2. The riser joint connection structure according to claim 1, characterized in that, The end face of the wedge block is provided with a universal ball head, and the wedge groove is provided with a positioning groove; When the wedge block moves within the inlet groove and / or the transition groove, the universal ball joint abuts against the bottom of the inlet groove and / or the bottom of the transition groove, and the universal ball joint is recessed into the wedge block so that the male connector can move smoothly within the inlet groove and / or the transition groove. When the wedge block rotates into the wedge groove, the universal ball head pops out and engages with the positioning groove.

3. The riser joint connection structure according to claim 1, characterized in that, The wedge-shaped blocks, wedge-shaped grooves, and transition grooves are provided in multiples. The multiple wedge-shaped blocks and multiple wedge-shaped grooves are arranged in a circumferentially corresponding interval. Each wedge-shaped groove is connected to the inlet groove through the corresponding transition groove.

4. The riser joint connection structure according to claim 1, characterized in that, The wedge-shaped blocks and the wedge-shaped grooves are provided in multiples, and the multiple wedge-shaped blocks and the multiple wedge-shaped grooves are arranged at intervals in a one-to-one correspondence along the axial direction.

5. The riser joint connection structure according to claim 1, characterized in that, The riser connector connection structure includes a guide cone surface and a guide cone groove that mates with the guide cone surface. The guide cone surface is located on the outer peripheral wall of the male connector, and the guide cone groove is located inside the female connector.

6. The riser joint connection structure according to claim 1, characterized in that, The riser connector connection structure includes a first hook provided on the outer peripheral wall of the male connector and a second hook provided on the outer peripheral wall of the female connector; The male connector and the female connector rotate relative to each other so that the first hook and the second hook can engage.

7. The riser joint connection structure according to claim 6, characterized in that, The first hook and the second hook are provided in multiples, and the multiple first hooks and the multiple second hooks are arranged at intervals in a one-to-one correspondence along the circumference.

8. A riser module, characterized in that, It includes a plurality of risers and a riser joint connection structure according to any one of claims 1 to 7, wherein each riser includes a plurality of pipe fittings; In two connected risers, any of the pipe fittings of one riser is connected to a corresponding pipe fitting of the other riser through the riser joint connection structure.

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