Fastening device for flexible riser
By installing observation ports and fastening discs on the channel pipe, the problem of difficulty in observing the position of the flexible riser during the lifting process is solved, and its accurate positioning and fixation in offshore floating production storage and offloading units are realized.
Patent Information
- Application Number
- CN202520488023.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-19
AI Technical Summary
In offshore floating production storage and offloading (FPSO) units, the upper position of the flexible riser cannot be observed in the enclosed space during the lifting process, making it difficult to fix it above the channel.
A fastening device is designed, including a channel tube and a fastening plate. The channel tube is provided with an observation port and a passage. The position of the flexible riser is observed through the observation port, and its upper end is fixed by the fastening plate, so as to determine and fix it in the preset position.
The observation port allows for easy monitoring of the flexible riser's position, ensuring its upper end is accurately positioned and fixed above the channel pipe, thus simplifying the connection process.
Smart Images
Figure CN223821936U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to offshore floating production storage and offloading device field, especially in a kind of fastening device for flexible riser. BACKGROUND
[0002] Offshore floating production storage and offloading device (abbreviation FPSO) is increasingly built in domestic, and each FPSO needs to be equipped with flexible riser and seabed equipment (such as wellhead, manifold and pipeline etc.) connection;Flexible riser is connected with seabed equipment at one end, and the other end needs to be pulled and lifted to the upper balcony (upper deck) designated position and FPSO device connection after finishing.
[0003] In the current marine engineering field, flexible riser will pass through relatively closed space (upper balcony pipeline) in the process of lifting, and the position of the upper end of flexible riser in the channel cannot be observed in this process, which is inconvenient to fix flexible riser above the channel. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a kind of fastening device for flexible riser, to facilitate the position of the upper end of flexible riser in the channel pipe, to facilitate the position of the upper end of flexible riser, so that the upper end of flexible riser is limited in the upper of channel pipe.
[0005] To solve the above technical problems, the utility model adopts the following technical solutions:
[0006] According to one aspect of the utility model, the utility model provides a kind of fastening device for flexible riser, including channel pipe and fastening disc;Channel pipe is arranged on the upper deck along vertical direction;The upper and lower ends of the channel pipe respectively exceed the upper deck;Passageway is opened in the outer peripheral wall of the channel pipe, and the passageway is penetrated to the passageway;Fastening disc is used to fix the upper end of flexible riser;The fastening disc is used to be fixed on the upper surface of the channel pipe.
[0007] In some embodiments of the present application, cover is provided at the observation port, and the cover is detachably connected to the channel pipe to close the observation port.
[0008] In some embodiments of the present application, the outer periphery of the channel pipe is provided with a through hole, and the cover is provided with a connecting hole;The connecting hole corresponds to the through hole, so that the connecting hole and the through hole can be penetrated by fastener.
[0009] In some embodiments of the present application, the observation port is close to the upper end of the channel pipe, and the observation port is located above the upper surface of the upper deck.
[0010] In some embodiments of the present application, the observation port is spaced apart along the circumference of the passage pipe.
[0011] In some embodiments of the present application, the inner circumferential side of the lower end of the passage is expanded radially outwardly in the downward direction.
[0012] In some embodiments of the present application, the upper end of the outer circumference of the passage pipe is formed with a protruding connecting lug; the connecting lug is provided with a through hole extending upward and downward; the bottom surface of the fastening disc is provided with a through hole; the through hole of the fastening disc is opposite to the through hole of the connecting lug; a first bolt is arranged between the through hole of the fastening disc and the through hole of the connecting lug.
[0013] In some embodiments of the present application, the fastening disc is provided with a limiting hole extending upward and downward; the limiting hole is arranged corresponding to the passage; the upper end of the flexible riser is provided with a fixing flange; the lower end of the fixing flange is arranged in the flexible riser; the upper end edge of the fixing flange is outwardly protruded to form an overlapping portion; the lower end of the overlapping portion is abutted against the upper end of the fastening disc.
[0014] In some embodiments of the present application, the fastening disc comprises at least two branch discs which can be separated from each other; the branch discs are connected by a second bolt; the branch discs are abutted against each other; the limiting hole is arranged between the branch discs.
[0015] From the above technical solution, the present application has at least the following advantages and positive effects:
[0016] In the present application, the observation port is used to conveniently observe the position of the upper end of the flexible riser in the passage pipe, so as to determine the position of the upper end of the flexible riser, and then the upper end of the flexible riser is limited above the passage pipe. The upper end of the flexible riser is fixed on the fastening disc, so that the upper end of the flexible riser can be fixed at the preset position above the upper deck.
[0017] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.
[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS
[0019] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.
[0020] Figure 1 This is a schematic diagram of the flexible riser of this utility model during the traction process.
[0021] Figure 2 This is a schematic diagram of the flexible riser after it has been positioned according to the present invention.
[0022] Figure 3 This is a schematic diagram of the channel tube of this utility model.
[0023] Figure 4 yes Figure 3 Enlarged view of point A in the middle.
[0024] Figure 5 yes Figure 3 Sectional view at point BB.
[0025] Figure 6 This is a cross-sectional view of the channel tube at point CC.
[0026] Figure 7 This is a schematic diagram of the hole structure of the cap of this utility model.
[0027] Figure 8 This is a top view of the fastening disc of this utility model.
[0028] Figure 9 yes Figure 8 Cross-sectional view at point DD.
[0029] The reference numerals in the attached drawings are explained as follows: 10, flexible riser; 20, upper deck; 30, fixed flange; 40, traction rigging; 100, passage pipe; 110, passageway; 111, guide ramp; 120, connecting lug; 130, fixing hole; 140, observation port; 150, through hole; 160, protruding wall; 200, fastening plate; 210, perforation; 220, limiting hole; 310, first bolt; 320, second bolt; 330, fastener; 400, cover; 410, connecting hole. Detailed Implementation
[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.
[0031] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.
[0032] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present application, and should not be construed as limiting the present application.
[0033] For ease of description and understanding, the state of an offshore floating production storage and offloading (FPSO) unit during operation is used as a reference, with the vertical direction referring to the up-down direction.
[0034] Figure 1 This is a schematic diagram of the flexible riser 10 of this utility model during the traction process. Figure 2 This is a schematic diagram of the flexible riser 10 of this utility model after it has been limited.
[0035] See Figure 1 This application provides a fastening device for a flexible riser 10. One end of the flexible riser 10 is used for connection to subsea equipment, and the other end is set at a pre-positioned position on the upper deck 20 and connected to the FPSO device.
[0036] During the connection process of the flexible riser 10, after the lower end of the flexible riser 10 is connected to the subsea equipment, the upper end of the flexible riser 10 moves upward under the drive of the traction cable 40. The upper end of the flexible riser 10 is pulled to the fastening device under the action of the traction cable 40 and is limited at the fastening device to facilitate the connection of the flexible riser 10 to the FPSO device in the preset position.
[0037] The fastening device may include a channel tube 100 and a fastening disc 200. The channel tube 100 is positioned on the upper deck 20.
[0038] In one embodiment, an installation port extending vertically through the upper deck 20 is provided, through which the channel pipe 100 passes and is confined. The upper and lower ends of the channel pipe 100 extend beyond the upper deck 20, so that the traction rigging 40 can pass through the channel pipe 100 from bottom to top and can drive the flexible riser 10 through the channel pipe 100.
[0039] In some embodiments, the channel pipe 100 is fixed to the edge of the upper deck 20, and the traction rigging 40 can pass through the channel pipe 100 from bottom to top and can drive the flexible riser 10 through the channel pipe 100.
[0040] It should be noted that, in one embodiment, the upper end of the flexible riser 10 is provided with a fixed flange 30 for connecting the FPSO device. The traction rigging 40 is connected to the fixed flange 30 to drive the upper end of the flexible riser 10 to move.
[0041] In some embodiments, the upper end of the flexible riser 10 is provided with other structures, such as a connecting joint, to which the traction rigging 40 is connected.
[0042] In other embodiments, the upper end of the flexible riser 10 is not provided with a connecting structure, and the traction rigging 40 is directly fixed to the upper end of the flexible riser 10.
[0043] Figure 3 This is a structural schematic diagram of the channel tube 100 of this utility model.
[0044] See Figures 1 to 3 The channel pipe 100 is vertically installed on the upper deck 20, with its upper and lower ends extending beyond the upper deck 20. A through passage 110 is provided on the channel pipe 100. The through passage 110 allows the flexible riser 10 to pass through the channel pipe 100, with the upper end of the flexible riser 10 positioned above the upper deck 20 for connection to the FPSO unit. A towing rigging 40 passes through the through passage 110, enabling the upper end of the flexible riser 10 to pass through the through passage 110.
[0045] The inner circumferential side of the lower end of the passageway 110 expands outward radially in the downward direction to form a guide slope 111. The guide slope 111 gradually increases in size in the downward direction. When the upper end of the flexible riser 10 is driven upward into the passageway 110 of the channel pipe 100, the guide slope 111 guides the flexible riser 10, making it easier for the upper end of the flexible riser 10 to enter the passageway 110.
[0046] It should be noted that the lower end of the flexible riser 10 is fixed to the subsea equipment. When the upper end of the flexible riser 10 is close to the channel pipe 100, the flexible riser 10 is mostly not vertical. The setting of the guide slope 111 facilitates the alignment of the flexible riser 10 and the channel 110, so as to facilitate the flexible riser 10 to enter the channel 110.
[0047] Figure 4 yes Figure 3 Enlarged view of point A in the middle.
[0048] See Figures 1 to 4The upper end of the outer periphery of the channel tube 100 has a protruding connecting lug 120; the connecting lug 120 has a through-hole 130 for connecting the fastening disc 200. The first bolt 310 passes through the fastening hole 130 and is threaded to the corresponding structure on the fastening disc 200, thereby fixing the fastening disc 200 along its own axial direction to the upper surface of the channel tube 100.
[0049] The connecting lug 120 protrudes from the outer periphery of the channel tube 100, and the fixing hole 130 is opened on the connecting hole 410, so as to facilitate the insertion of the first bolt 310 on the channel tube 100.
[0050] In some implementations, the connecting ear 120 is an annular structure, and the connecting ear 120 is arranged around the axis of the channel tube 100. The connecting ear 120 is provided with a plurality of fixing holes 130, which are distributed around the axis of the channel tube 100.
[0051] In other embodiments, a connecting ear 120 is formed by a partial outward protrusion on the outer periphery of the channel tube 100. The connecting ear 120 is formed at the upper end of the channel tube 100. Multiple connecting ears 120 are provided on the outer periphery of the channel tube 100. The multiple connecting ears 120 are distributed around the axis of the channel tube 100. Each connecting ear 120 is provided with a fixing hole 130.
[0052] Figure 5 yes Figure 3 Sectional view at point BB. Figure 6 This is a cross-sectional view of the channel tube at point CC. Figure 7 This is a schematic diagram of the hole structure of the cover 400 of this utility model.
[0053] See Figures 1 to 7 An observation port 140 is provided on the outer peripheral wall of the channel pipe 100, extending into the passageway 110, so that information at the corresponding position within the passageway 110 can be obtained through the observation port 140. For example, when passing through the observation port 140 at the corresponding position at the upper end of the flexible riser 10, this information can be obtained at the observation port 140.
[0054] The position of the upper end of the flexible riser 10 within the channel tube 100 is easily observed through the observation port 140, facilitating the determination of the upper end position of the flexible riser 10 and thus conveniently limiting the upper end of the flexible riser 10 above the channel tube 100. The upper end of the flexible riser 10 is fixed to the fastening plate 200 to fix the upper end of the flexible riser 10 in a predetermined position above the upper deck 20 for connection of the FPSO device at that predetermined position.
[0055] In some embodiments, a camera (not shown) is provided at the channel tube 100, and the camera is positioned corresponding to the observation port 140. The camera can be positioned outside the observation port 140, and the camera can acquire signals from the upper end of the flexible riser 10 to the upper end of the passageway 110. The camera can be moved to the observation port, and the camera can acquire position information of the upper end of the flexible riser 10 within the passageway 110. After the flexible riser 10 is fixed above the channel tube 100, the camera can be removed.
[0056] In other embodiments, a camera (not shown) is disposed within the observation port 140, the camera being used to acquire information within the passageway 110. For example, the camera is capable of acquiring signals reaching the upper end of the passageway 110 from the upper end of the flexible riser 10.
[0057] The camera is detachably mounted inside the observation port 140, and can acquire position information of the upper end of the flexible riser 10 within the passageway 110. After the flexible riser 10 is fixed above the passageway 100, the camera can be removed to save costs.
[0058] In one embodiment, the observation port 140 is located near the upper end of the channel tube 100, above the upper surface of the upper deck 20. The observation port 140's location above the upper deck 20 facilitates operation at the observation port 140.
[0059] In other embodiments, the observation port 140 is located above the upper surface of the upper deck 20, and the camera is detachably disposed within the observation port 140, thereby facilitating the placement and removal of the camera within the observation port 140.
[0060] It should be noted that a marking structure or marking feature is set on the upper outer periphery of the flexible riser 10. After the marking information is obtained at the observation port 140, it indicates that the flexible riser 10 has moved upward to the corresponding installation position, and it is not necessary to pull the flexible riser 10 upward.
[0061] In one embodiment, a cover 400 is provided at the observation port 140. The cover 400 is detachably connected to the channel tube 100 to close the observation port 140. After the camera is removed from the observation port 140, the cover 400 closes the observation port 140 to prevent debris from entering the passageway 110.
[0062] In one embodiment, the camera is located outside the observation port and the cover, which is a transparent or semi-transparent structure, allowing the camera to obtain information about the passageway through the cover.
[0063] In one specific embodiment, a through hole 150 is formed on the outer periphery of the channel tube 100, and a connecting hole 410 is formed on the cover 400; the connecting hole 410 corresponds to the through hole 150, so that a fastener 330 can pass through the connecting hole 410 and the through hole 150 to fix the cover 400 to the channel tube 100. The fastener 330 is a bolt, screw or rivet, etc.
[0064] In some embodiments, a protruding wall 160 is formed on the outer periphery of the channel tube 100 at the observation port 140. The protrusion surrounds the outer periphery of the observation port 140, and the cover 400 is fixed to the protruding wall 160. The protruding wall 160 extends the diameter of the observation port 140 in the radial direction of the channel tube 100, so that the observation port 140 has a larger volume for placing the camera.
[0065] Multiple connecting holes 410 and multiple through holes 150 are provided, and the multiple connecting holes 410 and multiple through holes 150 are provided correspondingly. The multiple through holes 150 are arranged around the observation port 140.
[0066] In other embodiments, the observation port 140 is configured as one or more, and when the observation port 140 is configured as multiple, the multiple observation ports 140 are spaced apart circumferentially along the channel tube 100.
[0067] Figure 8 This is a top view of the fastening disc 200 of this utility model. Figure 9 yes Figure 8 Cross-sectional view at point DD.
[0068] See Figures 2 to 9 The upper end of the outer periphery of the channel tube 100 has a protruding connecting lug 120; the connecting lug 120 has a through-hole 130; the bottom surface of the fastening plate 200 has a through hole 210, which is opposite to the fixing hole 130; a first bolt 310 passes between the through hole 210 and the fixing hole 130. Multiple through holes 210 and fixing holes 130 are provided, and the multiple through holes 210 are distributed around the axis of the channel hole. The fastening plate 200 is used to fix the upper end of the flexible riser 10, so as to fix the upper end of the flexible riser 10 in a preset position.
[0069] In some embodiments, the upper surface of the fastening disc 200 is recessed downward to form a groove, and a through hole 210 is formed on the bottom wall of the groove. The groove extends radially outward through the outer periphery of the fastening disc 200.
[0070] The fastening disc 200 has a through-hole 220, corresponding to the passageway 110. A fixing flange 30 is provided at the upper end of the flexible riser 10. The lower end of the fixing flange 30 passes through the flexible riser 10. The upper edge of the fixing flange 30 protrudes outward to form an overlap. The lower end of the overlap abuts against the upper end of the fastening disc 200, thereby limiting the fixing flange 30 on the fastening disc 200. The lower end of the overlap abuts against the upper end of the fastening disc 200, limiting the downward movement of the fixing flange 30, thus restricting the movement of the fixing flange 30 along its own axial direction. The lower end of the fixing flange or the upper end of the flexible riser passes through the limiting hole 220, which extends vertically through the fastening disc.
[0071] In some embodiments, the fastening disc 200 includes at least two branch discs that can be separated from each other; the branch discs are connected by a second bolt 320; the branch discs fit together; and a limiting hole 220 is formed between the branch discs.
[0072] In another embodiment, the second bolt 320 is connected to the sidewall of an adjacent groove. The first bolt 310 and the second bolt 320 can be a bolt and nut structure or a bolt structure, and the corresponding hole is a threaded hole.
[0073] In this application, the position of the upper end of the flexible riser 10 within the channel tube 100 is easily observed through the observation port 140, which facilitates determining the position of the upper end of the flexible riser 10 and thus conveniently limiting the upper end of the flexible riser 10 above the channel tube 100. The upper end of the flexible riser 10 is fixed to the fastening plate 200, thereby enabling the upper end of the flexible riser 10 to be fixed in a predetermined position above the upper deck 20.
[0074] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0075] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In the description of this specification, the reference to terms such as "some embodiments," "exemplarily," etc., means that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0076] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.
Claims
1. A fastening device for flexible risers, characterized in that, include: A channel tube is vertically installed on the upper deck; the upper and lower ends of the channel tube extend beyond the upper deck; a through passage is provided on the channel tube for the flexible riser to pass through; an observation port is provided on the outer peripheral wall of the channel tube, and the observation port extends through the through passage. A fastening disc is used to fix the upper end of the flexible riser; the fastening disc is used to fix the upper surface of the channel tube.
2. The fastening device according to claim 1, characterized in that, The observation port is provided with a cover, which is detachably connected to the channel tube to close the observation port.
3. The fastening device according to claim 2, characterized in that, The channel tube has a through hole on its outer periphery, and the cover has a connection hole; the connection hole corresponds to the through hole so that a fastener can pass through the connection hole and the through hole.
4. The fastening device according to claim 2, characterized in that, The observation port is located near the upper end of the channel tube and is situated above the upper surface of the upper deck.
5. The fastening device according to claim 1, characterized in that, The observation ports are arranged at intervals along the circumference of the channel tube.
6. The fastening device according to claim 1, characterized in that, The inner circumferential side of the lower end of the passageway expands radially outward in a downward direction along the passageway.
7. The fastening device according to claim 1, characterized in that, The upper end of the outer periphery of the channel tube has a protruding connecting lug; the connecting lug has a through-hole, and the bottom surface of the fastening plate has a through hole, which is opposite to the fixing hole; a first bolt passes through the through hole and the fixing hole.
8. The fastening device according to claim 1, characterized in that, The fastening plate has a vertically penetrating limiting hole, which corresponds to the passageway. The upper end of the flexible riser is provided with a fixed flange; the lower end of the fixed flange passes through the flexible riser; the upper edge of the fixed flange protrudes outward to form an overlap; the lower end of the overlap abuts against the upper end of the fastening disc.
9. The fastening device according to claim 8, characterized in that, The fastening disc includes at least two branch discs that can be separated from each other; the branch discs are connected by a second bolt; the branch discs fit together; and the limiting hole is formed between the branch discs.