Dynamic and static umbilical cable

Abstract

The invention provides a dynamic and static umbilical cable, and relates to the technical field of umbilical cables. Comprising at least one steel pipe, the steel pipe comprises a dynamic section and a static section, the inner diameter of the dynamic section is the same as that of the static section, the wall thickness of the dynamic section is larger than that of the static section, and the dynamic section and the static section are connected in a welded mode; at least one light unit; at least one electrical unit; the coating structure coats the peripheries of the steel pipe, the optical unit and the electric unit; the outer diameter of the first end of the unequal-diameter joint pipe is larger than that of the second end of the unequal-diameter joint pipe, the first end of the unequal-diameter joint pipe is connected with the dynamic section in a welded mode, and the second end of the unequal-diameter joint pipe is connected with the static section in a welded mode. According to the dynamic and static umbilical cable, the fatigue life of the dynamic and static umbilical cable is prolonged by increasing the wall thickness of the dynamic section steel pipe on the premise that the overall size of the dynamic and static umbilical cable is kept consistent. The production difficulty and cost are reduced, and the problems of overlarge rigidity and carbon corrosion of the connector box are effectively avoided.

Description

Technical Field

[0001] The present application relates to the field of umbilical cables, and in particular to a dynamic and static umbilical cable. Background Art

[0002] An umbilical cable is a composite submarine cable used in marine engineering to connect offshore platforms to underwater production systems. It integrates multiple functional units, including electrical cables, optical cables, and hydraulic or chemical hoses. Depending on the dynamic loads and cyclic fatigue loads to which it is subjected during operation, the umbilical cable can be divided into a dynamic section and a static section.

[0003] The dynamic portion of the umbilical cable must withstand greater and more complex mechanical forces, while the static portion of the umbilical cable is subject to relatively less force and has lower strength requirements. In actual engineering applications, to ensure safety, the entire umbilical cable is usually designed to meet the strength requirements of the dynamic portion. However, this results in the static portion being too strong, resulting in costly design.

[0004] To address this issue, the current common approach is to design the dynamic and static components separately and then connect them using a splice box. However, the umbilical cable's integrity is poor in the splice area, resulting in low connection strength and susceptibility to external interference. This not only complicates umbilical cable maintenance but also potentially impacts the system's long-term reliability and safety. Summary of the Invention

[0005] In response to the aforementioned issues, embodiments of the present application provide a dynamic-static umbilical cable. While maintaining consistent overall dimensions between the dynamic and static sections, this umbilical cable increases its fatigue life by increasing the wall thickness of the steel pipe in the dynamic section. This not only reduces production difficulty and cost, but also effectively avoids the problems of excessive joint box rigidity and carbon corrosion.

[0006] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0007] The present application provides a dynamic-static umbilical cable, comprising: at least one steel pipe, the steel pipe including a dynamic section and a static section, the inner diameter of the dynamic section being the same as the inner diameter of the static section and the wall thickness of the dynamic section being greater than the wall thickness of the static section, the dynamic section and the static section being welded together; an unequal-diameter joint pipe, the outer diameter of a first end of the unequal-diameter joint pipe being greater than the outer diameter of a second end of the unequal-diameter joint pipe, the first end of the unequal-diameter joint pipe being welded together with the dynamic section, and the second end of the unequal-diameter joint pipe being welded together with the static section; at least one optical unit; at least one electrical unit; and a covering structure covering the outer circumference of the steel pipe, the optical unit, and the electrical unit.

[0008] In a possible embodiment, it further includes: an unequal diameter joint pipe, the outer diameter of the first end of the unequal diameter joint pipe is greater than the outer diameter of the second end of the unequal diameter joint pipe, the first end of the unequal diameter joint pipe is welded to the dynamic section, and the second end of the unequal diameter joint pipe is welded to the static section.

[0009] In a possible implementation manner, the outer diameter of the unequal diameter joint pipe gradually decreases from the first end to the second end of the unequal diameter joint pipe.

[0010] In a possible implementation manner, the outer wall of the steel pipe is covered with a protective layer.

[0011] In a possible implementation, there are multiple steel pipes, and different steel pipes have different inner diameters.

[0012] In a possible implementation, the steel pipe with a large inner diameter is arranged in the central area of the dynamic and static umbilical cable, and the steel pipe with a small inner diameter is arranged around the outer periphery of the steel pipe with a large inner diameter.

[0013] In one possible embodiment, the steel pipe is a super duplex stainless steel pipe.

[0014] In a possible implementation, the structure further includes a filling structure, wherein the filling structure fills the gaps in the covering structure.

[0015] In one possible embodiment, the filling structure includes a solid filling part and a hollow filling part, the solid filling part is filled in the inner wall surface of the covering structure, and the hollow filling part is filled between adjacent steel pipes, between the steel pipe and the optical unit or between the steel pipe and the electrical unit, or between the optical unit and the electrical unit.

[0016] In a possible implementation, there are multiple electrical units, and each electrical unit is distributed at a different circumferential position within the covering structure.

[0017] In a possible implementation, there are multiple light units, and each light unit is distributed at a different circumferential position within the covering structure.

[0018] The present application provides a dynamic-static umbilical cable comprising at least one steel pipe, an unequal-diameter joint pipe, at least one optical unit, at least one electrical unit, and a sheathing structure covering the outer periphery of the steel pipe, optical unit, and electrical unit. The steel pipe is divided into a dynamic section and a static section, depending on the dynamic loads and cyclic fatigue loads it is subjected to during operation. The dynamic section must withstand large and complex mechanical forces, while the static section, subject to less stress, has relatively lower strength requirements. The inner diameters of the dynamic and static sections remain the same, but the wall thickness of the dynamic section is greater than that of the static section. This thicker wall thickness of the dynamic section provides higher strength and fatigue life to withstand more complex mechanical forces, while the thinner wall thickness of the static section reduces material cost and weight. The outer diameter of the first end of the unequal-diameter joint pipe is greater than the outer diameter of the second end of the unequal-diameter joint pipe. The first end of the unequal-diameter joint pipe is welded to the dynamic section, and the second end of the unequal-diameter joint pipe is welded to the static section. This simple and reliable connection avoids the problems of excessive joint box rigidity and carbon corrosion, ensuring reliability and durability while maximizing economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic diagram of the connection structure of the aluminum core submarine cable provided in an embodiment of the present application;

[0021] Figure 2 This is a schematic structural diagram of the dynamic section, static section and connecting parts of the steel pipe in the dynamic and static umbilical cable provided in an embodiment of the present application.

[0022] Description of reference numerals:

[0023] 10-Dynamic and static umbilical cables;

[0024] 100-steel pipe; 200-optical unit; 300-electrical unit; 400-cladding structure; 500-filling structure; 600-taping layer;

[0025] 110-static section; 120-dynamic section; 130-uneven diameter joint pipe; 140-protective layer; 510-solid filling part; 520-hollow filling part;

[0026] 131-first end; 132-second end. DETAILED DESCRIPTION

[0027] As mentioned in the background, umbilical cables are widely used in submarine oil and gas production, marine renewable energy development, and underwater production systems. They are primarily used to transmit hydraulic power, electricity, chemicals, and control signals to ensure the normal operation of underwater equipment.

[0028] Based on the dynamic loads and cyclic fatigue loads it experiences during operation, umbilical cables can be divided into dynamic and static sections. The dynamic section is typically located underwater, subject to frequent bending and stretching caused by currents, waves, and platform movement. The static section, typically located in a more stable environment, primarily bears fixed mechanical loads, subject to relatively small forces, and therefore has lower strength requirements.

[0029] In engineering applications of umbilical cables, to ensure safety and reliability, the entire umbilical cable is typically designed to meet the strength requirements of the dynamic portion. While this design strategy improves safety, it also results in static portion strength far exceeding actual requirements, resulting in wasteful material and production costs.

[0030] In order to optimize cost and performance, the dynamic part and the static part are often designed and connected in sections, so as to meet safety requirements while reducing unnecessary waste of resources. CN210720828U discloses a dynamic-static submarine optical cable junction box, which divides the submarine cable into a dynamic submarine optical cable and a static submarine optical cable, and connects the two in the form of a junction box. This solution can reduce costs, but it will cause the umbilical cable in the junction box area to have poor integrity, low connection strength, and be easily interfered with by external factors. CN116682604A discloses a dynamic-static conversion umbilical cable, which uses a steel strand structure added to a steel pipe as the dynamic part, while no steel strand is added to the steel pipe as the static part, and a metal ring is used to fix it in the middle. However, the welding connection between the steel strand and the steel pipe may cause carbon corrosion of the carbon steel material to the super duplex stainless steel pipe. In addition, welding the metal ring and adding the steel strand may increase the cross-sectional size of the umbilical cable, resulting in bulging at the connection end, thereby increasing the risk of damage during installation.

[0031] In view of this, an embodiment of the present application provides a dynamic and static umbilical cable, comprising at least one steel pipe, an unequal diameter joint pipe, at least one optical unit, at least one electrical unit, and a covering structure covering the periphery of the steel pipe, the optical unit, and the electrical unit. According to the different dynamic loads and periodic fatigue loads received during operation, the steel pipe is divided into a dynamic section and a static section. The dynamic section needs to withstand large and complex mechanical forces, while the static section has relatively low strength requirements due to the smaller force. Among them, the inner diameters of the dynamic section and the static section remain consistent, but the wall thickness of the dynamic section is greater than the wall thickness of the static section. In this way, the thicker wall thickness of the dynamic section can provide higher strength and fatigue life to cope with more complex mechanical forces, while the static section maintains a thinner wall thickness to reduce material cost and weight. The outer diameter of the first end of the unequal diameter joint pipe is greater than the outer diameter of the second end of the unequal diameter joint pipe. The first end of the unequal diameter joint pipe is welded to the dynamic section, and the second end of the unequal diameter joint pipe is welded to the static section. The connection method is simple and reliable, avoiding the problems of excessive rigidity and carbon corrosion of the joint box, while ensuring reliability and durability while maximizing economic benefits.

[0032] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] Figure 1 This is a schematic diagram of the structure of the dynamic and static umbilical cable provided in the embodiment of the present application. Figure 1 As shown, an embodiment of the present application provides a dynamic and static umbilical cable 10. The dynamic and static umbilical cable 10 can be used to provide a reliable hydraulic power source for valve actuators in underwater production systems, ensuring the smooth execution of key operations and the efficient operation of the system. The dynamic and static umbilical cable 10 can also provide continuous power support for the underwater production system, meet the operating requirements of various equipment, and ensure the stability and reliability of the system. In addition, the dynamic and static umbilical cable 10 has a chemical delivery function, and can accurately deliver chemicals such as methanol and corrosion inhibitors to underwater oil wells and other facilities through dedicated channels to effectively prevent corrosion and maintain the long-term stability of the equipment. At the same time, the dynamic and static umbilical cable 10 can also achieve precise control of the underwater production system, support real-time monitoring and remote management by transmitting control signals and operating status data, and improve the intelligence level of the system.

[0034] Reference Figure 1As shown, the dynamic-static umbilical cable 10 includes a steel pipe 100, an optical unit 200, an electrical unit 300, and a sheathing structure 400. The integrated design of the steel pipe 100, optical unit 200, and electrical unit 300 enables the dynamic-static umbilical cable 10 to efficiently transmit hydraulic power, chemicals, electricity, and data. The sheathing structure 400 protects the dynamic-static umbilical cable 10 from physical damage and chemical corrosion, and provides the necessary mechanical strength to withstand the various stresses of the marine environment, ensuring the normal operation and remote control of the dynamic-static umbilical cable 10.

[0035] Among them, the steel pipe 100 serves as a hydraulic or chemical pipe, which can transport control fluid or chemicals (such as methanol and corrosion inhibitors) from the offshore platform to the underwater production system. In addition, the steel pipe 100 can provide mechanical protection and structural support for internal components, enabling it to withstand various stresses in the marine environment. The design of the steel pipe 100 needs to consider internal pressure, external pressure, tensile and bending stresses to determine the appropriate material and wall thickness. For example, the material of the steel pipe 100 can be super duplex stainless steel. Super duplex stainless steel is an alloy composed of two phases, austenite and ferrite, with high strength and corrosion resistance, and can adapt to the high pressure and corrosive environment of the deep sea.

[0036] Figure 2 This is a structural diagram of the dynamic section, static section and connecting portion of the steel pipe in the dynamic and static umbilical cable provided in the embodiment of the present application. Figure 2 As shown, the steel pipe 100 can be divided into a static section 110 and a dynamic section 120. The static section 110 is typically fixed to the seabed or platform and does not move significantly with changes in the external environment. It is subject to relatively small movements and stress changes, and therefore has lower strength requirements. The dynamic section 120 is typically located in an underwater environment and is subject to frequent bending and stretching caused by ocean currents, waves, and platform movement. Therefore, the dynamic section 120 requires higher strength and toughness to resist fatigue and impact loads.

[0037] According to fatigue life prediction theory, significant hoop stress and radial stress are generated during the bending and straightening process of the pipe body, and these stresses vary nonlinearly with the pipe wall thickness. In other words, increasing the wall thickness can increase the fatigue life of the steel pipe 100.

[0038] Therefore, refer to Figure 2 As shown, while maintaining the same inner diameters of the dynamic section 120 and the static section 110, the present application increases the wall thickness of the dynamic section 120, making it thicker than the wall thickness of the static section 110. This thicker wall thickness of the dynamic section 120 provides higher strength and fatigue life to withstand more complex mechanical forces, reducing the risk of material fatigue and fracture caused by repeated loads. Maintaining a thinner wall thickness for the static section 110 reduces material cost and weight.

[0039] Compared to the solution of adding a steel strand structure as the dynamic section 120 to the steel pipe 100 and using a metal collar to fix the steel strand structure, the present application increases the wall thickness of the dynamic section 120 and connects the dynamic section 120 and the static section 110 by welding, which can effectively avoid the carbon corrosion problem of the super duplex stainless steel pipe caused by the carbon steel material when the steel strand is welded to the steel pipe. At the same time, the use of metal collars and steel strands is eliminated, avoiding the increase in the cross-sectional size of the umbilical cable and the bulging phenomenon at the connection end caused by the protrusion of the structural transition point, thereby reducing the risk of damage during installation, optimizing the structural dimensions of the dynamic and static umbilical cable 10, and enhancing the overall reliability and safety of the dynamic and static umbilical cable 10.

[0040] Once the dynamic and static sections 120 and 110 are designed, they can be connected by welding. The welding process requires consideration of heat treatment and stress relief to avoid stress concentration and potential fatigue sources in the weld area. In complex marine environments, welded connections can withstand complex mechanical stresses and corrosion, ensuring the structural integrity, sealing, and long-term reliability of the dynamic and static umbilical cable 10.

[0041] Continue to refer to Figure 2 As shown, the dynamic-static umbilical cable 10 may further include an unequal-diameter joint pipe 130, which can be used to connect the dynamic section 120 and the static section 110. The first end 131 of the unequal-diameter joint pipe 130 is welded to the dynamic section 120, and the second end 132 of the unequal-diameter joint pipe 130 is welded to the static section 110. Welding the dynamic section 120 and the static section 110 together using the unequal-diameter joint pipe 130 significantly simplifies the butt welding alignment and installation process, reduces the risk of welding defects caused by improper alignment, and thereby improves construction efficiency and welding quality.

[0042] It should be noted that the outer diameter of the first end 131 of the unequal diameter joint pipe 130 is greater than the outer diameter of the second end 132, and the outer diameter of the unequal diameter joint pipe 130 gradually decreases from the first end 131 to the second end 132 of the unequal diameter joint pipe 130. Exemplarily, a smooth transition surface can be provided between the first end 131 and the second end 132 of the unequal diameter joint pipe 130, or a stepped surface can be provided. This embodiment does not impose specific restrictions on this. In this way, the unequal diameter joint pipe 130 helps to achieve the transition between the dynamic section 120 and the static section 110, reduces the stress concentration caused by the sudden change in diameter, and helps to reduce the local stress peak, thereby improving the fatigue life of the connection and the durability of the overall structure.

[0043] In addition, the design of the unequal diameter joint pipe 130 can effectively disperse and alleviate the mechanical stress differences caused by the different wall thicknesses of the dynamic section 120 and the static section 110, thereby improving the structural integrity and stability of the entire dynamic and static umbilical cable 10 and ensuring its long-term reliability and safety in complex marine environments.

[0044] Of course, the unequal diameter joint pipe 130 can also provide a transition area between the dynamic section 120 and the static section 110, which can provide a smoother transition path for the fluid in the steel pipe 100, reduce the turbulence and eddy current phenomenon of the fluid in the pipeline, reduce local resistance and pressure loss, optimize the fluid dynamics performance, improve the efficiency of fluid transportation, and reduce energy consumption.

[0045] The present application effectively solves many problems existing in the connection process by using unequal diameter joint pipes 130 to replace the traditional joint box to connect the dynamic section 120 and the static end 110. Compared with the traditional joint box, the unequal diameter joint pipe 130 significantly improves the integrity and flexibility of the connection, avoiding the structural fragility caused by excessive rigidity. In addition, the application of the welding process enhances the connection strength between the dynamic section 120 and the static end 110, so that the steel pipe 100 remains stable and reliable under high stress conditions. At the same time, this design reduces the interference of external factors on the connection area, such as mechanical shock and environmental pressure changes, and further improves the anti-interference ability and durability of the dynamic and static umbilical cable 10.

[0046] Reference Figure 1 As shown, the outer wall of the steel pipe 100 is also provided with a protective layer 140. The protective layer 140 can provide a solid barrier for the steel pipe 100, so that the steel pipe 100 can effectively resist external mechanical impact, scratches and wear, and prevent structural damage caused by external forces. In addition, the protective layer 140 can also prevent direct contact and friction between adjacent steel pipes 100, reduce surface damage and wear caused by mutual friction, and thus maintain the integrity and functionality of the steel pipe 100. In addition, the protective layer 140 can also effectively resist the erosion of the steel pipe 100 by high temperature environments and corrosive media, thereby extending the service life of the steel pipe 100. The protective layer 140 can be made of a material with excellent wear resistance, corrosion resistance and high temperature resistance. For example, the protective layer 140 can be obtained by uniformly coating the outer wall of the steel pipe 100 with materials such as polyethylene and polyurethane through an extrusion process.

[0047] Due to the difference in wall thickness of the steel pipe 100 in the dynamic section 120 and the static section 110, their outer diameters differ. Therefore, the thickness of the outer protective layer 140 of the dynamic section 120 and the static section 110 can be adjusted to make the protective layer 140 of the dynamic section 120 thinner than that of the static section 110. This ensures that the overall outer diameters of the dynamic section 120 and the static section 110, after being coated with the protective layer 140, are the same, ensuring the overall uniformity and consistency of the system. This reduces the need for adjustments to other components in the dynamic-static umbilical cable 10, helps improve the overall coordination and compatibility of the dynamic-static umbilical cable 10, and reduces production difficulty, time, and costs.

[0048] Reference Figure 1 As shown, multiple steel pipes 100 can be provided, and different steel pipes 100 can have different inner diameters based on actual needs. When the dynamic and static umbilical cable 10 is equipped with multiple steel pipes 100, the different steel pipes 100 can be arranged in a nearly symmetrical distribution. This allows a certain degree of flexibility to adapt to specific functional requirements and space constraints while maintaining overall structural stability. Furthermore, the nearly symmetrical distribution helps to balance stress distribution within the dynamic and static umbilical cable 10, reducing stress concentration caused by asymmetrical arrangement, thereby improving the durability and stability of the dynamic and static umbilical cable 10.

[0049] In one possible implementation, the steel pipe 100 with a larger inner diameter can be positioned in the center of the dynamic / static umbilical cable 10, while the steel pipe 100 with a smaller inner diameter can be positioned around the outer periphery of the larger inner diameter steel pipe 100. This arrangement can improve the overall structural stability of the dynamic / static umbilical cable 10, enhance its torsional resistance, reduce the risk of damage due to torsion in dynamic environments, and ensure the reliable operation of the dynamic / static umbilical cable 10 under harsh conditions.

[0050] The optical unit 200 can be used to transmit optical signals, providing a high-speed data transmission channel and ensuring fast and reliable data transmission to meet modern communication requirements. Furthermore, the optical unit 200 can monitor the temperature and strain of the dynamic and static umbilical cable 10 in real time. Furthermore, by measuring the reflection and loss of optical signals, the optical unit 200 can identify and locate fault points in the dynamic and static umbilical cable 10, facilitating rapid repair of the cable 10, reducing downtime and improving production efficiency.

[0051] There may be a plurality of optical units 200 , and each optical unit 200 is distributed at different circumferential positions within the cladding structure 400 , which helps to achieve more uniform light coverage and more efficient optical signal transmission.

[0052] The electrical unit 300 is responsible for the efficient transmission of electrical energy from the power source to the load. For example, the electrical unit 300 can provide the necessary power to underwater equipment such as valve actuators, control boxes, and electric pumps, ensuring their proper operation. Alternatively, the electrical unit 300 can also be used to transmit control signals and data, including data transmitted from underwater equipment such as sensor readings and video signals, as well as control commands sent from the surface.

[0053] There may be multiple electrical units 300 , and the electrical units 300 are distributed at different circumferential locations within the covering structure 400 , thereby achieving more uniform power distribution and more efficient electrical signal transmission.

[0054] The sheathing structure 400, which covers the outer periphery of the steel pipe 100, optical unit 200, and electrical unit 300, protects the dynamic and static umbilical cable 10 from external mechanical forces, such as physical damage caused by friction with seabed rocks and sediments, fishing activities, and erosion of the internal structure by seawater and other corrosive substances, thereby extending the service life of the dynamic and static umbilical cable 10. Furthermore, during the installation and recovery of the dynamic and static umbilical cable 10, the sheathing structure 400 also provides additional tensile strength, reducing the risk of breakage due to external forces. For example, the sheathing structure 400 can be a polyethylene sheath.

[0055] Continue to refer to Figure 1 As shown, the dynamic-static umbilical cable 10 further includes a filling structure 500. Filling the gaps within the cladding structure 400, the filling structure 500 effectively increases the overall rigidity and stability of the dynamic-static umbilical cable 10 and reduces movement and friction of internal components. Furthermore, the filling structure 500 absorbs and disperses external shocks or vibrations, protecting the internal optical unit 200, electrical unit 300, and steel pipe 100 from being crushed.

[0056] For example, the filling structure 500 can be made of a lightweight foam material, which can provide a good cushioning effect without significantly increasing the weight of the dynamic / static umbilical cable 10. Alternatively, the filling structure 500 can be made of a gel material, which has high elasticity and good fluidity. Its elastic properties allow the material to deform and return to its original shape when subjected to mechanical stress, while its fluidity enables it to redistribute stress within the dynamic / static umbilical cable 10, thereby alleviating local stress concentration. This embodiment does not limit the specific material of the filling structure 500.

[0057] In addition, the filling structure 500 may include a solid filling portion 510 and a hollow filling portion 520. The solid filling portion 510 fills the inner wall surface of the covering structure 400, providing strong support and protection. The hollow filling portion 520 can be flexibly distributed between adjacent steel pipes 100, between a steel pipe 100 and an optical unit 200, between a steel pipe 100 and an electrical unit 300, or between an optical unit 200 and an electrical unit 300.

[0058] The unique cavity structure of the hollow filler 520 effectively absorbs and disperses external vibration and impact forces. When the dynamic / static umbilical cable 10 is subjected to external mechanical shock or vibration, the hollow filler 520, through its elastic deformation properties, converts the instantaneous impact energy into internal stress distribution. This buffering effect not only protects the physical integrity of components such as the steel pipe 100, optical unit 200, and electrical unit 300, but also reduces wear and fatigue caused by vibration, extending the service life of the dynamic / static umbilical cable 10.

[0059] In addition, the presence of the hollow filling portion 520 can effectively isolate the mechanical transmission paths between different units, reduce or prevent the propagation of vibration and shock between different components, and further enhance the anti-interference capability and stability of the static umbilical cable 10. The various embodiments or implementations in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the same or similar parts between the various embodiments.

[0060] Continue to refer to Figure 1 As shown, the dynamic / static umbilical cable 10 may further include a tape layer 600, disposed inside the sheathing structure 400. The tape layer 600 is used to bundle the optical unit 200, electrical unit 300, steel pipe 100, and filling structure 500, preventing the optical unit 200, electrical unit 300, and steel pipe 100 from loosening or shifting during installation or operation of the dynamic / static umbilical cable 10. For example, the tape layer 600 may be made of a high-strength fabric tape with excellent tensile strength and wear resistance to enhance the dynamic / static umbilical cable 10's strength and stability. For example, the high-strength fabric tape may be made of materials such as aramid fiber tape or polyester fiber tape.

[0061] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A dynamic and static umbilical cable, characterized in that: include: At least one steel pipe, the steel pipe comprising a dynamic section and a static section, the inner diameter of the dynamic section being the same as the inner diameter of the static section and the wall thickness of the dynamic section being greater than the wall thickness of the static section, the dynamic section and the static section being welded together; An unequal diameter joint pipe, wherein the outer diameter of the first end of the unequal diameter joint pipe is greater than the outer diameter of the second end of the unequal diameter joint pipe, the first end of the unequal diameter joint pipe is welded to the dynamic section, and the second end of the unequal diameter joint pipe is welded to the static section; at least one light unit; at least one electrical unit; The covering structure covers the outer periphery of the steel pipe, the optical unit and the electrical unit.

2. The dynamic and static umbilical cable according to claim 1, characterized in that: The outer diameter of the unequal diameter joint pipe gradually decreases from the first end to the second end of the unequal diameter joint pipe.

3. The dynamic and static umbilical cable according to claim 1, characterized in that: The outer wall of the steel pipe is covered with a protective layer.

4. The dynamic and static umbilical cable according to claim 1, characterized in that: There are multiple steel pipes, and the inner diameters of different steel pipes are different.

5. The dynamic and static umbilical cable according to claim 4, characterized in that: The steel pipe with a large inner diameter is arranged in the central area of the dynamic and static umbilical cable, and the steel pipe with a small inner diameter is arranged around the outer periphery of the steel pipe with a large inner diameter.

6. The dynamic and static umbilical cable according to claim 1, characterized in that: The steel pipe is a super duplex stainless steel pipe.

7. The dynamic and static umbilical cable according to claim 1, characterized in that: Also includes: A filling structure is provided, wherein the filling structure fills the gaps in the covering structure.

8. The dynamic and static umbilical cable according to claim 7, characterized in that: The filling structure includes a solid filling part and a hollow filling part. The solid filling part is filled in the inner wall surface of the covering structure, and the hollow filling part is filled between adjacent steel pipes, between the steel pipe and the optical unit or between the steel pipe and the electrical unit, or between the optical unit and the electrical unit.

9. The dynamic and static umbilical cable according to claim 1, characterized in that: There are multiple electrical units, and each of the electrical units is distributed at different circumferential positions within the covering structure.

10. The dynamic and static umbilical cable according to claim 1, characterized in that: There are multiple light units, and each light unit is distributed at a different circumferential position within the covering structure.

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