System connector suitable for offshore oil and gas subsea production

Abstract

The application relates to the technical field of connectors and provides a system connector suitable for marine oil and gas underwater production, which comprises a mounting body and a connecting body, the outer peripheral walls of the two ends of two pipes close to each other are provided with butt joint parts in a convex manner, a sealing gap is formed between the two butt joint parts, and a sealing ring is embedded in the sealing gap; the mounting body is provided with two mounting bodies corresponding to the two pipes, each mounting body is sleeved on the outer peripheral wall of the corresponding pipe, and the mounting body is located on the side of the butt joint part of the corresponding pipe away from the sealing gap; and the connecting body is sleeved on the outer peripheral walls of the two mounting bodies to connect the two mounting bodies in series. The system connector suitable for marine oil and gas underwater production can improve the installation convenience and sealing performance of the connector.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of connectors, in particular to a system connector suitable for offshore oil and gas underwater production. BACKGROUND

[0002] A connector (pipe joint) is a device used to connect pipes, enabling the pipe system to achieve a sealed and stable connection to ensure the safe and smooth transmission of fluids (such as liquids, gases, etc.) in the pipe. It is a common hardware part in the field of modern oil and gas engineering.

[0003] In the prior art, at the connection position of two pipes, direct welding or the use of a connector structure is generally selected according to the working conditions, but for underwater production in a marine environment, welding operations are extremely difficult to implement, and some pipes are used in applications involving hydrogen, carbon dioxide, and acidic oil and gas, etc. In these applications, due to material compatibility or environmental conditions, traditional welding techniques may have problems. Therefore, in this scenario, a connection scheme using a connector becomes the preferred choice, but the existing connector structure is generally cumbersome to install and the sealing performance needs to be improved. Therefore, there is an urgent need for a connector that is easy to install and can improve the sealing performance between pipes. SUMMARY

[0004] In order to improve the installation convenience and sealing performance of the connector, the present application provides a system connector suitable for offshore oil and gas underwater production.

[0005] The system connector suitable for offshore oil and gas underwater production provided by the present application adopts the following technical scheme:

[0006] The system connector suitable for offshore oil and gas underwater production comprises a mounting body and a connecting body, and the outer peripheral walls of the two pipes close to each other are each provided with a butt joint portion protruding outward, a sealing gap is formed between the two butt joint portions, and a sealing ring is embedded in the sealing gap; the mounting body is provided with two mounting bodies corresponding to the two pipes, each mounting body is sleeved on the outer peripheral wall of the corresponding pipe, and the mounting body is located on the side of the butt joint portion of the corresponding pipe away from the sealing gap; the connecting body is sleeved on the outer peripheral walls of the two mounting bodies to connect the two mounting bodies in series; the outer peripheral wall of each pipe is sleeved with a closure ring, the closure ring is threadedly connected with the outer peripheral wall of the corresponding pipe, and when the two closure rings are tightened, the two closure rings abut against both ends of the connecting body; the connecting body comprises an inner ring and an outer ring provided on the outer peripheral side of the inner ring, the inner ring is threadedly connected with the two mounting bodies; a recessed area is formed between the inner peripheral wall of the inner ring and the outer peripheral wall of the butt joint portion of the two pipes, and the recessed area is annular around the central axis of the pipe; a sealing air bag is arranged in the recessed area, and the sealing air bag is annular and surrounds the outer peripheral side of the sealing gap.

[0007] By adopting the technical scheme, when the two pipes are connected, the outer circumferential walls of the two pipes are sleeved with the mounting bodies respectively, then the connecting body is sleeved with the outer circumferential walls of the two mounting bodies, and the connecting body connects the two pipes in series through the two mounting bodies, thereby improving the installation convenience of the connector; the connection between the mounting body and the connecting body forms a first sealing for the sealing gap, and the sealing ring forms a second sealing for the sealing gap, thereby improving the sealing performance of the overall structure; after the connecting body connects the two mounting bodies in series, the two sealing rings are respectively rotated to force the two sealing rings to approach each other to abut against the two ends of the connecting body, on one hand, the sealing ring can improve the connection stability between the connecting body and the mounting body, thereby improving the connection stability between the two pipes. On the other hand, after the sealing ring abuts against the connecting body, the sealing ring can seal the gap between the connecting body and the mounting body, thereby improving the sealing effect between the connecting body and the mounting body; the sealing air bag surrounds the sealing gap to seal the sealing gap, thereby improving the sealing effect of the overall structure.

[0008] Optionally, the inner ring comprises a connecting portion and a deformation portion, the connecting portion is provided with two connecting portions corresponding to the two mounting bodies, and each connecting portion is threadedly connected with the corresponding mounting body; the deformation portion is arranged between the two connecting portions, the deformation portion is in an arc shape, and the inner circumferential wall of the deformation portion and the outer circumferential wall of the pipe abutting portion form the recessed area; the cavity is formed between the inner ring and the outer ring, and the cavity is provided with an extrusion assembly, when the two sealing rings are tightened, the extrusion assembly forces the deformation portion to deform towards the recessed area.

[0009] By adopting the technical scheme, on one hand, the cavity is arranged to reduce the overall weight of the connecting body, thereby reducing the burden of the two pipes and improving the installation convenience of the connecting body to a certain extent. After the connecting body is sleeved with the two mounting bodies, the two sealing rings are rotated to force the two sealing rings to abut against the two ends of the connecting body, during the process, the extrusion assembly can force the deformation portion to deform towards the recessed area, thereby extruding the sealing air bag to generate a certain air pressure in the sealing air bag to separate the sealing gap from the outside, thereby improving the sealing performance of the sealing air bag.

[0010] Optionally, the extrusion assembly comprises first extrusion rings, a reset spring and a pushing member, the first extrusion rings are provided with two, both of which are slidingly installed in the cavity, and both of which are provided corresponding to the two connecting portions, and each of the first extrusion rings is sleeved on the outer peripheral wall of the corresponding connecting portion; the first extrusion ring is provided with a first extrusion surface, when the two first extrusion rings are close to each other, the first extrusion ring forces the deformation portion to deform towards the recess area through the first extrusion surface; the reset spring is arranged between the two first extrusion rings, and under normal circumstances, the reset spring forces the two first extrusion rings to move away from each other to be separated from the deformation portion; the pushing member is arranged between the first extrusion ring and the closing ring, when the two closing rings are tightened, the pushing member forces the two first extrusion rings to move close to each other.

[0011] By adopting the above technical scheme, after the connecting body is sleeved on the two mounting bodies, the two closing rings are rotated to force the two closing rings to abut against the two ends of the connecting body, in this process, the closing ring forces the two first extrusion rings to move close to each other through the pushing member, so that the two first extrusion rings extrude the surface of the deformation portion through the first extrusion surface of each first extrusion ring, and force the deformation portion to deform towards the recess area, thereby extruding the sealing air bag, forming a certain air pressure, increasing the difficulty of fluid passing through the recess area, and further improving the sealing performance of the overall structure.

[0012] Optionally, the pushing member comprises two groups of first pushing rods, which are provided corresponding to the two first extrusion rings, and the two groups of first pushing rods are respectively arranged on the end faces of the two first extrusion rings moving away from each other, and under normal circumstances, the reset spring forces the end faces of the two groups of first pushing rods to extend out of the outer ring for the closing ring to push.

[0013] By adopting the above technical scheme, under normal circumstances, the reset spring forces the two first extrusion rings to move away from each other, so that the ends of the two groups of first pushing rods moving away from each other extend out of the outer ring for the closing ring to push. When the closing ring is tightened, the closing ring can push the first extrusion ring through the first pushing rod, thereby driving the first extrusion surface of the first extrusion ring to extrude the deformation portion, improving the operation convenience of the overall structure.

[0014] Optionally, the outer peripheral wall of each connecting portion has a second extrusion surface, the second extrusion surface gradually decreases in outer diameter from the end away from the deformation portion to the end close to the deformation portion; the outer peripheral wall of each connecting portion is sleeved with a second extrusion ring, the second extrusion ring is connected with a second pushing rod, one end of the second pushing rod is connected to the second extrusion ring, and the other end penetrates through the first extrusion ring on the outer peripheral side of the corresponding connecting portion and is connected to the first extrusion ring on the outer peripheral side of the other connecting portion.

[0015] By adopting the technical scheme, when the two first extrusion rings are close to each other, the two second extrusion rings can be forced to be far away from each other, so as to drive the second extrusion rings to extrude the second extrusion surface of the connecting part, thereby generating an inward extrusion force on the connecting part, making the connecting part tightly abut against the corresponding mounting body, improving the connection stability between the connecting part and the mounting body, and improving the sealing between the connecting part and the mounting body to a certain extent.

[0016] Optionally, the first push rod and the second push rod are each arranged at intervals around the central axis of the pipeline, the side wall of each first push rod abuts against the outer peripheral wall of the corresponding connecting part, and the side wall of each second push rod abuts against the inner peripheral wall of the outer ring.

[0017] By adopting the technical scheme, on the one hand, the arrangement of the plurality of first push rods enables the closed ring to push the first extrusion ring through the plurality of first push rods, thereby improving the uniformity of stress of the first extrusion ring; the arrangement of the plurality of second push rings enables the first extrusion ring to push the second extrusion ring through the plurality of second push rods, thereby improving the uniformity of stress of the second extrusion ring, and further improving the smooth sliding of the first extrusion ring and the second extrusion ring. On the other hand, the side wall of the first push rod abuts against the outer peripheral wall of the corresponding connecting part to form support for the outer peripheral wall of the connecting part, and the side wall of the second push rod abuts against the inner peripheral wall of the outer ring to support the inner peripheral wall of the outer ring, thereby enhancing the connection between the inner ring and the outer ring and improving the structural stability of the connecting body.

[0018] Optionally, the outer peripheral wall of each of the two closed rings is fixedly provided with a connecting ring, the surface of the connecting ring is provided with a plurality of connecting grooves arranged at intervals around the central axis of the closed ring; the connecting rings of the two closed rings are connected by a plurality of reinforcing rods, the reinforcing rods are arranged in correspondence with the connecting grooves of the connecting rings, and the two ends of the reinforcing rods are respectively embedded in the opposite connecting grooves of the two connecting rings; the outer diameter of the reinforcing rod is matched with the inner diameter of the connecting groove, the outer peripheral wall of each end of the reinforcing rod is provided with two cutting surfaces, the inner wall of each connecting groove is provided with an inlet and outlet penetrating the outer peripheral wall of the connecting ring, and the spacing between the opposite side walls of the inlet and outlet is matched with the spacing between the two cutting surfaces of the reinforcing rod.

[0019] By adopting the technical scheme, the reinforcing rod is installed between the connecting rings of the two closed rings, the two closed rings are connected in series through the reinforcing rod, and the structural rigidity of the connection between the two pipelines is improved. When the reinforcing rod is installed, the two cutting surfaces of the reinforcing rod are aligned with the inlet and outlet of the connecting groove and are pushed in, the spacing between the two opposite side walls of the inlet and outlet is matched with the spacing between the two cutting surfaces of the reinforcing rod, so that the reinforcing rod can enter the connecting groove through the cutting surface. After the reinforcing rod enters the connecting groove, the reinforcing rod is driven to "rotate" around its own central axis by a certain angle to change the orientation of the two cutting surfaces, so that the reinforcing rod can be embedded in the connecting groove of the connecting ring, and the reinforcing rod can be installed in the connecting groove of the two connecting rings. Then, the tool drives the reinforcing rod to "revolve" around the central axis of the pipeline, so as to simultaneously drive the two closed rings to rotate to abut against the two ends of the connecting body, thereby improving the operation convenience of the overall structure. During the process of driving the two closed rings to approach each other (i.e. the closed rings slip along the axial direction of the reinforcing rod), the cutting surface can move out of the connecting groove of the connecting ring. At this time, no matter how the reinforcing rod is driven to "rotate", the reinforcing rod cannot be separated from the connecting groove, thereby greatly improving the stability of the overall structure.

[0020] Optionally, the outer peripheral wall of the reinforcing rod is provided with an abutting ring, and the surface of the abutting ring is provided with an elastic pad. When the closed ring is tightened, the surface of the connecting ring close to the connecting body abuts against the elastic pad.

[0021] By adopting the above technical scheme, the abutting ring is arranged to axially limit the reinforcing rod, thereby reducing the possibility that the reinforcing rod slips along the axial direction and separates from the connecting ring, and improving the connection stability of the overall structure. When the closed ring is tightened, the surface of the closed ring close to the connecting body abuts against the elastic pad to form a tight state, thereby improving the "series connection" effect of the reinforcing rod between the two closed rings, and further improving the structural rigidity of the connection between the two pipelines.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. By arranging the mounting body and the connecting body, when the two pipelines are connected, the mounting body is arranged on the outer peripheral wall of the two pipelines, and then the connecting body is arranged on the outer peripheral wall of the two mounting bodies. The connecting body connects the two pipelines in series through the two mounting bodies, thereby improving the installation convenience of the connector. The connection between the mounting body and the connecting body forms a "first sealing" for the sealing gap, and the sealing ring forms a "second sealing" for the sealing gap, thereby improving the sealing performance of the overall structure.

[0024] 2. By the arrangement of the extrusion assembly, on the one hand, the arrangement of the cavity reduces the overall weight of the connecting body, thereby reducing the burden of the two pipes and improving the installation convenience of the connecting body to a certain extent. After the connecting body is sleeved on the two mounting bodies, the two closure rings are rotated to force the two closure rings to abut against the two ends of the connecting body. In this process, the extrusion assembly can force the deformation part to deform towards the recess, thereby extruding the sealing air bag and generating a certain air pressure in the sealing air bag to separate the sealing gap from the outside and improve the sealing performance of the sealing air bag;

[0025] 3. By arranging the reinforcing rod between the connecting rings of the two closure rings, the reinforcing rod is connected in series with the two closure rings to improve the structural rigidity of the connection between the two pipes. When installing the reinforcing rod, the two cutting surfaces of the reinforcing rod are parallel to the inlet and outlet of the connecting slot and are pushed in. The distance between the two opposite side walls of the inlet and outlet is matched with the distance between the two cutting surfaces of the reinforcing rod, so that the reinforcing rod can enter the connecting slot through the cutting surface. After the reinforcing rod enters the connecting slot, the reinforcing rod is driven to "rotate" around its own central axis by a certain angle to change the orientation of the two cutting surfaces, so that the reinforcing rod can be embedded in the connecting slot of the connecting ring to realize the installation of the reinforcing rod in the connecting slot of the two connecting rings. Then, the tool drives the reinforcing rod to "revolve" around the central axis of the pipe to simultaneously rotate the two closure rings to abut against the two ends of the connecting body, thereby improving the operation convenience of the overall structure. During the process of driving the two closure rings to move close to each other (i.e., the closure ring slides along the axial direction of the reinforcing rod), the cutting surface can move out of the connecting slot of the connecting ring. At this time, no matter how the reinforcing rod is driven to "rotate", the reinforcing rod cannot be separated from the connecting slot, which greatly improves the stability of the overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a sectional view of the overall structure of Example 1;

[0027] Figure 2 is a sectional view of the overall structure of Example 2;

[0028] Figure 3 is a sectional view of the structure of the closure ring of Example 3;

[0029] Figure 4 is a state diagram of the closure ring of Example 3 when it is tightened;

[0030] Figure 5 is Figure 4 is an enlarged view of A in FIG. 6;

[0031] Figure 6 is a sectional view of the second extrusion ring of Example 4;

[0032] Figure 7 is a structural diagram of the reinforcing rod of Example 5;

[0033] Figure 8 is a partial sectional view embodying the cutting surface and the connecting groove of embodiment 5;

[0034] Figure 9 is a partial sectional view embodying the reinforcing rod embedded in the connecting groove of embodiment 5.

[0035] Explanation of reference numerals: 1, mounting body; 2, connecting body; 21, inner ring; 211, connecting part; 212, deformation part; 22, outer ring; 23, recessed area; 24, sealing air bag; 25, cavity; 26, protruding ring; 261, second extrusion surface; 262, first avoiding groove; 27, second extrusion ring; 28, second pushing rod; 3, pipeline; 31, abutting part; 311, second groove; 32, sealing gap; 33, sealing ring; 34, embedded ring groove; 4, closing ring; 41, connecting ring; 411, connecting groove; 412, inlet and outlet; 413, second magnet; 5, extrusion assembly; 51, first extrusion ring; 511, first extrusion surface; 512, second avoiding groove; 52, return spring; 53, first pushing rod; 6, reinforcing rod; 61, cutting surface; 62, abutting ring; 63, elastic pad; 64, first magnet. DETAILED DESCRIPTION

[0036] The following Figures 1-9 The application is further described in detail. Embodiment 1

[0037] The embodiments of the application disclose a system connector suitable for offshore oil and gas underwater production.

[0038] With reference to Figure 1 The system connector suitable for offshore oil and gas underwater production comprises a mounting body 1 and a connecting body 2, and the mounting body 1 and the connecting body 2 are annular around the central axis of the pipeline 3. In the embodiment, the outer peripheral wall of the abutting part 31 protrudingly arranged at the end of each of the two pipelines 3 to be connected and close to each other is integrally formed between the abutting part 31 and the pipeline 3, the abutting part 31 is annularly arranged around the central axis of the pipeline 3, and the sealing gap 32 is formed between the two abutting parts 31.

[0039] The end surface of the abutting part 31 of each of the two pipelines 3 close to the sealing gap 32 is provided with a first groove, and the first groove is annularly arranged around the central axis of the pipeline 3. When the abutting parts 31 of the two pipelines 3 to be connected abut each other, the first grooves of the two pipelines 3 are combined to form an embedded ring groove 34, and the sealing ring 33 is embedded in the embedded ring groove 34. The sealing ring 33 is a rubber ring. In other embodiments, the sealing ring 33 can be an octagonal sealing ring.

[0040] In the embodiment, two mounting bodies 1 are provided, and the two mounting bodies 1 are provided in correspondence with two pipes 3, each mounting body 1 is sleeved on the outer peripheral wall of the corresponding pipe 3 and is threadedly connected with the outer peripheral wall of the corresponding pipe 3 (the thread is not shown in the figure), and in other embodiments, the mounting body 1 and the pipe 3 can be fixed by welding in advance; each mounting body 1 is located on the side of the butt joint portion 31 of the corresponding pipe 3 away from the sealing gap 32. The connecting body 2 is sleeved on the outer peripheral wall of the two mounting bodies 1 to connect the two mounting bodies 1 in series, and the connecting body 2 and the two mounting bodies 1 are threadedly connected (the thread is not shown in the figure).

[0041] It should be noted that the inner peripheral wall of the mounting body 1 and the outer peripheral wall of the pipe 3, and the inner peripheral wall of the connecting body 2 and the outer peripheral wall of the mounting body 1 are all wrapped with raw rubber tape (not shown in the figure); in this way, the sealing performance between the mounting body 1 and the pipe 3 and between the connecting body 2 and the mounting body 1 is improved.

[0042] The implementation principle of the embodiment 1 of the application is that when the two pipes 3 are connected, the mounting body 1 is sleeved on the outer peripheral wall of each pipe 3, and then the connecting body 2 is sleeved on the outer peripheral wall of the two mounting bodies 1, the connecting body 2 connects the two pipes 3 in series through the two mounting bodies 1, thereby improving the installation convenience of the connector; the connection between the mounting body 1 and the connecting body 2 forms a “first” sealing for the sealing gap 32, and the sealing ring 33 forms a “second” sealing for the sealing gap 32, thereby improving the sealing performance of the overall structure. Embodiment 2

[0043] The embodiment of the application discloses a system connector suitable for offshore oil and gas underwater production.

[0044] The system connector suitable for offshore oil and gas underwater production disclosed by the embodiment of the application is different from the embodiment 1 in that:

[0045] Reference Figure 2 In the embodiment, the outer peripheral wall of each pipe 3 is sleeved with a sealing ring 4, and the sealing ring 4 is threadedly connected with the outer peripheral wall of the corresponding pipe 3 (the thread is not shown in the figure), when the two sealing rings 4 are screwed (that is, when the sealing ring 4 is rotated and forced to slide towards the sealing gap 32), the two sealing rings 4 abut against the two ends of the connecting body 2. It should be noted that the inner peripheral wall of the sealing ring 4 and the outer peripheral wall of the pipe 3 also need to be wrapped with raw rubber tape.

[0046] The implementation principle of the embodiment 2 of the application is as follows: after the connecting body 2 is connected in series with the two mounting bodies 1, the two closing rings 4 on the outer circumferential walls of the two pipes 3 are respectively rotated to force the two closing rings 4 to approach each other to abut against the two ends of the connecting body 2. On the one hand, the closing rings 4 can improve the connection stability between the connecting body 2 and the mounting bodies 1, thereby improving the connection stability between the two pipes 3. On the other hand, after the closing rings 4 abut against the connecting body 2, the gap between the connecting body 2 and the mounting bodies 1 can be sealed, thereby improving the sealing effect between the connecting body 2 and the mounting bodies 1. Embodiment 3

[0047] The embodiment of the application discloses a system connector suitable for offshore oil and gas underwater production.

[0048] The system connector suitable for offshore oil and gas underwater production disclosed by the embodiment of the application is different from the embodiment 2 in that:

[0049] With reference to Figure 3 , Figure 4 In the embodiment, the connecting body 2 comprises an inner ring 21 and an outer ring 22. The inner ring 21 is made of a plastic material, and the outer ring 22 is made of a metal material. The outer ring 22 is arranged on the outer circumferential side of the inner ring 21. The inner ring 21 and the outer ring 22 are connected and fixed by adhesion. A cavity 25 is formed between the inner ring 21 and the outer ring 22.

[0050] The deforming part 212 is arranged between the two connecting parts 211 and is integrally formed with the two connecting parts 211. The cross-sectional shape of the deforming part 212 is arc-shaped. The outer circumferential wall of the abutting part 31 of each pipe 3 is provided with a second groove 311. The second groove 311 is annular around the central axis of the abutting part 31. The inner circumferential wall of the deforming part 212 and the second groove 311 of the abutting part 31 of the two pipes 3 form a recessed area 23. The recessed area 23 is annular around the central axis of the pipe 3. A sealing air bag 24 is arranged in the recessed area 23. The outer wall of the sealing air bag 24 is connected to the inner circumferential wall of the deforming part 212 (the arc surface of the deforming part 212 away from the cavity 25) by adhesion. The sealing air bag 24 is annular and surrounds the outer circumferential side of the sealing gap 32. The sealing air bag 24 is filled with gas.

[0051] With reference to Figure 3 , Figure 5The cavity 25 is provided with an extrusion assembly 5. When the two closure rings 4 are screwed, the extrusion assembly 5 forces the deformation portion 212 to deform towards the recessed area 23, so that the sealing air bag 24 is tightly abutted to the second groove 311 of the butt joint portion 31 of the two pipelines 3. The extrusion assembly 5 comprises a first extrusion ring 51, a reset spring 52 and a pushing member. The first extrusion ring 51 is provided with two, and the two first extrusion rings 51 are slidingly installed in the cavity 25. The two first extrusion rings 51 are correspondingly arranged with the two connecting portions 211, each first extrusion ring 51 is sleeved on the outer circumferential wall of the corresponding connecting portion 211, and the two first extrusion rings 51 are symmetrically distributed on both sides of the deformation portion 212. Each first extrusion ring 51 has a first extrusion surface 511. When the two first extrusion rings 51 are close to each other, the first extrusion ring 51 forces the deformation portion 212 to deform towards the recessed area 23 through the first extrusion surface 511.

[0052] The reset spring 52 is arranged in the cavity 25, and the two ends of the reset spring 52 are fixedly connected to the two first extrusion rings 51. The number of reset springs 52 is multiple, and the multiple reset springs 52 are arranged at intervals around the central axis of the pipeline 3. Under normal circumstances, the reset spring 52 forces the two first extrusion rings 51 to move away from each other to be separated from the deformation portion 212. The pushing member is arranged between the first extrusion ring 51 and the closure ring 4. When the two closure rings 4 are screwed, the pushing member forces the two first extrusion rings 51 to move close to each other.

[0053] Referring to Figure 3 , Figure 4 , Figure 5 The pushing member comprises two groups of first pushing rods 53, which are correspondingly arranged with the two first extrusion rings 51. The two groups of first pushing rods 53 are arranged at the end faces of the two first extrusion rings 51 away from each other. The two ends of the first pushing rod 53 extend along the length direction of the pipeline 3. Under normal circumstances, the reset spring 52 forces the end faces of the two groups of first pushing rods 53 to protrude out of the outer ring 22 for the pushing of the closure ring 4. The end face of the outer ring 22 is provided with a through hole for the first pushing rod 53 to pass through. In the embodiment, the number of first pushing rods 53 in each group is multiple, and the multiple first pushing rods 53 are arranged at intervals around the central axis of the pipeline 3. The side wall of each first pushing rod 53 abuts against the outer circumferential wall of the corresponding connecting portion 211.

[0054] The implementation principle of the embodiment 3 of the application is as follows: after the connecting body 2 is sleeved on the two mounting bodies 1, the two closing rings 4 are rotated to force the two closing rings 4 to abut against the two ends of the connecting body 2. In this process, the closing ring 4 forces the two first extrusion rings 51 to approach each other through the first push rod 53, so that the two first extrusion rings 51 extrude the surface of the deformation part 212 through the respective first extrusion surfaces 511, and force the deformation part 212 to deform towards the recessed area 23, so as to extrude the sealing air bag 24, and form a certain air pressure in the recessed area 23, so as to increase the difficulty of the fluid passing through the recessed area 23, and further improve the sealing performance of the overall structure.

[0055] In addition, the plurality of first push rods 53 are arranged to push the first extrusion ring 51 through the plurality of first push rods 53, so as to improve the uniformity of the stress of the first extrusion ring 51 and improve the smoothness of the sliding of the first extrusion ring 51. In addition, the side wall of the first push rod 53 abuts against the outer peripheral wall of the corresponding connecting part 211 to support the outer peripheral wall of the connecting part 211 and improve the structural stability of the connecting part 211. Embodiment 4

[0056] The embodiment of the application discloses a system connector suitable for offshore oil and gas underwater production.

[0057] The system connector suitable for offshore oil and gas underwater production disclosed by the embodiment of the application is different from the embodiment 3 in that:

[0058] With reference to Figure 6 In the embodiment, the outer peripheral wall of each connecting part 211 is integrally formed with a protruding ring 26. The protruding ring 26 is annular around the central axis of the connecting part 211, and the protruding ring 26 surrounds the gap between the mounting body 1 and the abutting part 31 of the corresponding pipeline 3. The outer peripheral wall of the protruding ring 26 forms a second extrusion surface 261, and the outer diameter of the second extrusion surface 261 gradually decreases from the end away from the deformation part 212 to the end close to the deformation part 212.

[0059] The outer peripheral wall of each connecting part 211 is sleeved with a second extrusion ring 27. The second extrusion ring 27 is connected with a second push rod 28. The two ends of the second push rod 28 extend along the length direction of the pipeline 3. One end of the second push rod 28 is fixedly connected to the second extrusion ring 27, and the other end penetrates through the first extrusion ring 51 on the outer peripheral side of the corresponding connecting part 211 and is fixedly connected to the first extrusion ring 51 on the outer peripheral side of the other connecting part 211. It should be noted that the protruding ring 26 and the second extrusion ring 27 are both provided with a first avoiding slot 262 for the first push rod 53 of the first extrusion ring 51 to penetrate through. The number of the first avoiding slots 262 corresponds to the number of the first push rods 53. Each first extrusion ring 51 is provided with a second avoiding slot 512 for the second push rod 28 of the second extrusion ring 27 to penetrate through. The number of the second avoiding slots 512 corresponds to the number of the second push rods 28.

[0060] In this embodiment, multiple second push rods 28 are arranged at intervals around the central axis of the pipe 3, and the side walls of each second push rod 28 are pressed against the inner wall of the outer ring 22; it should be noted that the multiple second push rods 28 of the two second extrusion rings 27 are staggered around the central axis of the pipe 3 to avoid the possibility of interference between the multiple second push rods 28 of the two second extrusion rings 27.

[0061] The implementation principle of Example 4 of the present application is as follows: the second extrusion ring 27 passes through the first extrusion ring 51 on the outer peripheral side of the corresponding connection part 211 through the second push rod 28, and is connected to the first extrusion ring 51 on the outer peripheral side of the other connection part 211. When the two first extrusion rings 51 approach each other, they can force the two second extrusion rings 27 to move away from each other, so as to drive the second extrusion ring 27 to squeeze the second extrusion surface 261 of the connection part 211, thereby generating an inward extrusion force on the connection part 211, so that the connection part 211 is firmly pressed against the corresponding mounting body 1, thereby improving the connection stability between the connection part 211 and the mounting body 1.

[0062] The convex ring 26 surrounds the gap between the mounting body 1 and the docking portion 31 of the corresponding pipe 3. When the second extrusion ring 27 squeezes the second extrusion surface 261 to generate an extrusion force, the connecting portion 211 can press against the gap between the mounting body 1 and the docking portion 31 of the corresponding pipe 3, thereby improving the sealing between the connecting portion 211 and the mounting body 1 to a certain extent. Example 5

[0063] The embodiments of the present application disclose a system connector suitable for underwater marine oil and gas production.

[0064] The system connector for marine oil and gas underwater production disclosed in the embodiment of this application differs from that in embodiment 2 in that:

[0065] Reference Figure 7 、 Figure 8 In this embodiment, the outer walls of the two closed rings 4 are integrally formed with a connecting ring 41, and a plurality of connecting grooves 411 are opened on the surface of the connecting ring 41, and the plurality of connecting grooves 411 are arranged at intervals around the central axis of the closed ring 4; a plurality of reinforcing rods 6 are connected between the connecting rings 41 of the two closed rings 4, and the plurality of reinforcing rods 6 are arranged corresponding to the plurality of connecting grooves 411 of the connecting rings 41, and the two ends of the reinforcing rods 6 are respectively embedded in the corresponding connecting grooves 411 of the two connecting rings 41.

[0066] In this embodiment, the outer diameter of the reinforcing rod 6 is adapted to the inner diameter of the connecting groove 411. Two cutting surfaces 61 are formed on the outer circumferential walls at both ends of the reinforcing rod 6, and the two cutting surfaces 61 are maintained parallel to each other. Each connecting groove 411 has an inlet and outlet 412 formed on the inner wall thereof, which penetrates the outer circumferential wall of the connecting ring 41. The spacing between the two opposing side walls of the inlet and outlet 412 is adapted to the spacing between the two cutting surfaces 61 of the reinforcing rod 6. It should be noted that in this embodiment, the threads of the outer circumferential walls of the two pipes 3 are arranged in opposite directions. That is, when the two closed rings 4 are driven to rotate in the same direction, the two closed rings 4 can move closer to or farther away from each other.

[0067] Reference Figure 8 、 Figure 9 Two first magnets 64 are embedded in the outer peripheral wall of the reinforcing rod 6, and the two first magnets 64 and the two cutting surfaces 61 are arranged in an alternating manner around the central axis of the reinforcing rod 6; two second magnets 413 are embedded in the inner peripheral wall of the connecting groove 411, and the two first magnets 64 and the two second magnets 413 are arranged correspondingly. When the reinforcing rod 6 is inserted into the connecting groove 411 through the cutting surface 61 and rotated 90 degrees, the first magnets 64 magnetically attract the corresponding second magnets 413.

[0068] Reference Figure 7 、 Figure 8 The outer wall of the reinforcing rod 6 is fixedly installed with an abutment ring 62. Two abutment rings 62 are provided and are arranged corresponding to the two closed rings 4. The two abutment rings 62 are located between the connecting rings 41 of the two closed rings 4; an elastic pad 63 is fixedly installed on the surface of the abutment ring 62. When the closed ring 4 is tightened, the surface of the connecting ring 41 close to the connector 2 is pressed against the elastic pad 63. The elastic pad 63 can be made of rubber.

[0069] The implementation principle of Example 5 of the present application is as follows: a reinforcing rod 6 is installed between the connecting rings 41 of the two closed rings 4. The two closed rings 4 are connected in series by the reinforcing rod 6 to improve the structural rigidity of the connection between the two pipes 3. When installing the reinforcing rod 6, the two cutting surfaces 61 of the reinforcing rod 6 are aligned parallel to the inlet and outlet 412 of the connecting groove 411 and pushed in. The spacing between the two opposing side walls of the inlet and outlet 412 matches the spacing between the two cutting surfaces 61 of the reinforcing rod 6, so that the reinforcing rod 6 can pass through the cutting surfaces 61 and enter the connecting groove 411. After the reinforcing rod 6 enters the connecting groove 411, it is driven to "rotate" around its own central axis by a certain angle to change the orientation of the two cutting surfaces 61. Then, the reinforcing rod 6 can be embedded in the connecting groove 411 of the connecting ring 41, thereby achieving the installation of the reinforcing rod 6 in the connecting grooves 411 of the two connecting rings 41.

[0070] Then, the tool drives the reinforcing rod 6 to revolve around the central axis of the pipe 3, and the two closed rings 4 are simultaneously driven to rotate, so that the two closed rings 4 are respectively abutted against the two ends of the connecting body 2, and the operation convenience of the overall structure is improved. In the process of driving the two closed rings 4 to approach each other (i.e. the closed ring 4 slides along the axial direction of the reinforcing rod 6), the cutting surface 61 can move out of the connecting groove 411 of the connecting ring 41, and at this time, no matter how the reinforcing rod 6 is driven to rotate, the reinforcing rod 6 cannot be separated from the connecting groove 411, and the stability of the overall structure is greatly improved.

[0071] The above is the preferred embodiment of the present application, which does not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A system connector suitable for use in subsea oil and gas production, characterised in that: The utility model provides a pipeline connecting device, including installation body (1) and connecting body (2), the outer peripheral wall of two pipelines (3) near one end of mutual approach is provided with butt joint part (31) outwardly, and the sealing gap (32) is formed between two butt joint parts (31), and the sealing ring (33) is embedded in sealing gap (32), installation body (1) is provided with two and is correspondingly arranged with two pipelines (3), and each installation body (1) is sleeved on the outer peripheral wall of corresponding pipeline (3), and installation body (1) is located on the side of corresponding pipeline (3) butt joint part (31) away from sealing gap (32), connecting body (2) is sleeved on the outer peripheral wall of two installation bodies (1) to connect two installation bodies (1), and the outer peripheral wall of each pipeline (3) is sleeved with closed ring (4), and closed ring (4) is threadedly connected between the outer peripheral wall of corresponding pipeline (3), when two closed rings (4) are screwed, two closed rings (4) are respectively pressed to the both ends of connecting body (2), connecting body (2) includes inner ring (21) and outer ring (22) arranged on the outer peripheral side of inner ring (21), and inner ring (21) is threadedly connected between two installation bodies (1), and the inner peripheral wall of inner ring (21) and the outer peripheral wall between two pipeline (3) butt joint parts (31) form recessed area (23), and recessed area (23) is annular around the central axis of pipeline (3), and sealing air bag (24) is arranged in recessed area (23), and sealing air bag (24) is annular and surrounds the outer peripheral side of sealing gap (32), inner ring (21) includes connecting part (211) and deformation part (212), connecting part (211) is provided with two and is correspondingly arranged with two installation bodies (1), and each connecting part (211) is threadedly connected between corresponding installation body (1), and deformation part (212) is arranged between two connecting parts (211), and deformation part (212) is arc-shaped, and the inner peripheral wall of deformation part (212) and the outer peripheral wall between two pipeline (3) butt joint parts (31) form recessed area (23), cavity (25) is formed between inner ring (21) and outer ring (22), and extrusion assembly (5) is arranged in cavity (25), when two closed rings (4) are screwed, extrusion assembly (5) forces deformation part (212) to deform towards recessed area (23), extrusion assembly (5) includes first extrusion ring (51), reset spring (52) and pusher, first extrusion ring (51) is provided with two, and two first extrusion rings (51) are slidably installed in cavity (25), and two first extrusion rings (51) are correspondingly arranged with two connecting parts (211), and each first extrusion ring (51) is sleeved on the outer peripheral wall of corresponding connecting part (211), first extrusion ring (51) is equipped with first extrusion face (511), when two first extrusion rings (51) are close to each other, first extrusion ring (51) forces deformation part (212) to deform towards recessed area (23) through first extrusion face (511).The reset spring (52) is arranged between two first extrusion rings (51), and under normal circumstances, the reset spring (52) forces the two first extrusion rings (51) to move away from each other to be separated from the deformation part (212); the pusher is arranged between the first extrusion ring (51) and the closing ring (4), and when the two closing rings (4) are screwed, the pusher forces the two first extrusion rings (51) to move close to each other.

2. A system connector suitable for use in offshore oil and gas subsea production according to claim 1, characterized in that: The pushing member comprises two groups of first pushing rods (53) which are arranged correspondingly with the two first extrusion rings (51), and the two groups of first pushing rods (53) are arranged on the end faces of the two first extrusion rings (51) away from each other, and under normal circumstances, the reset spring (52) forces the end faces of the two groups of first pushing rods (53) to extend out of the outer ring (22) for the closed ring (4) to push.

3. A system connector suitable for use in offshore oil and gas subsea production according to claim 2, characterised in that: The outer peripheral wall of each connection part (211) has a second extrusion surface (261) which gradually decreases in outer diameter from one end away from the deformation part (212) to one end close to the deformation part (212); the outer peripheral wall of each connection part (211) is sleeved with a second extrusion ring (27), the second extrusion ring (27) is connected with a second pushing rod (28), one end of the second pushing rod (28) is connected to the second extrusion ring (27), the other end passes through the first extrusion ring (51) on the outer peripheral side of the corresponding connection part (211), and is connected to the first extrusion ring (51) on the outer peripheral side of the other connection part (211).

4. A system connector suitable for use in offshore oil and gas subsea production according to claim 3, characterised in that: The first pushing rod (53) and the second pushing rod (28) are each arranged at intervals around the central axis of the pipeline (3), the side wall of each first pushing rod (53) abuts against the outer peripheral wall of the corresponding connection part (211), and the side wall of each second pushing rod (28) abuts tightly against the inner peripheral wall of the outer ring (22).

5. A system connector suitable for use in offshore oil and gas subsea production according to claim 1, characterized in that: The outer peripheral wall of each of the two closed rings (4) is fixedly installed with a connecting ring (41), the surface of the connecting ring (41) is provided with a plurality of connecting grooves (411) which are arranged at intervals around the central axis of the closed ring (4); the connecting rings (41) of the two closed rings (4) are connected with a plurality of reinforcing rods (6), the reinforcing rods (6) are arranged correspondingly with the connecting grooves (411) of the connecting rings (41), and the two ends of the reinforcing rod (6) are respectively embedded in the opposite connecting grooves (411) of the two connecting rings (41); the outer diameter of the reinforcing rod (6) is matched with the inner diameter of the connecting groove (411), the outer peripheral wall of the two ends of the reinforcing rod (6) is provided with two cutting surfaces (61), the inner wall of each connecting groove (411) is provided with an inlet and outlet (412) which penetrates the outer peripheral wall of the connecting ring (41), and the spacing between the two opposite side walls of the inlet and outlet (412) is matched with the spacing between the two cutting surfaces (61) of the reinforcing rod (6).

6. A system connector suitable for use in offshore oil and gas subsea production according to claim 5, characterised in that: The outer peripheral wall of the reinforcing rod (6) is provided with an abutting ring (62), the surface of the abutting ring (62) is provided with an elastic pad (63), and when the closed ring (4) is tightened, the surface of the connecting ring (41) close to the connecting body (2) abuts tightly against the elastic pad (63).

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