Protective device for gooseneck section of marine riser

Abstract

The present invention discloses a protective device for the gooseneck section of an ocean riser, comprising a protective outer cover and a spoiler assembly. The protective outer cover is covered on the outer side of the riser gooseneck to cover it, and the spoiler assembly is arranged on the peripheral part of the outer side of the protective outer cover. The spoiler assembly includes a plurality of spoiler blocks that can be spliced ​​and combined along the length direction of the riser gooseneck section, and the surface of the spoiler block facing away from the riser gooseneck section is arc-shaped to change the flow direction of the incoming ocean current to make it flow upward. The present invention covers the riser gooseneck section through the protective outer cover, thereby protecting the structure inside the protective outer cover, avoiding the problem of foreign objects falling directly on the riser gooseneck section to damage it, and also avoiding the ocean current directly scouring the riser gooseneck section, thereby playing a protective role; in addition, the spoiler assembly is arranged on the periphery of the protective outer cover, which can change the flow direction of the incoming ocean current to make it flow upward, thereby reducing the sediment scouring effect of the riser gooseneck section.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering, and in particular to a protective device for a gooseneck section of a marine riser. Background Art

[0002] Marine engineering, especially the exploration and exploitation of deep-sea oil and gas resources, is a key part of the global energy strategy. However, the complexity and unpredictability of the marine environment have brought huge challenges to the construction and maintenance of related facilities. Among them, the riser gooseneck is an important part connecting the middle of the submarine pipeline, such as Figure 1 As shown, the structural integrity and functionality of the riser gooseneck are directly related to the safety and efficiency of the entire operation. However, existing riser goosenecks have the following problems: First, they are subject to long-term seawater erosion, which easily forms scour pits. This can lead to loss of support and changes in the overall stress state. The continuous scouring of ocean currents can cause pipeline vibration and even fatigue failure. Second, the riser gooseneck is located close to the bottom of the jacket, exposing a high risk of falling objects and causing damage by third parties.

[0003] Therefore, there is an urgent need for a protective device for the gooseneck section of a marine riser to solve the above technical problems. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems, namely, to solve the following problems existing in the existing riser gooseneck: first, the riser gooseneck is subjected to long-term erosion by seawater, which easily forms scour pits, causing the riser gooseneck to lose support and change the overall stress state. Under the continuous scouring action of ocean currents, the pipeline is caused to vibrate and even fatigue damage is caused; second, the riser gooseneck is close to the bottom of the conductor rack, which has a greater risk of falling objects and is prone to third-party damage.

[0005] To this end, the present invention provides a protective device for the gooseneck section of a marine riser, comprising a protective outer cover and a spoiler assembly. The protective outer cover is covered on the outside of the riser gooseneck to cover it, and a spoiler assembly is arranged on the peripheral portion of the outside of the protective outer cover. The spoiler assembly is configured to reduce the scouring force of the ocean current on the base of the riser gooseneck and the protective outer cover by changing the direction and speed of the ocean current.

[0006] In the above-mentioned specific embodiment of the protective device for the gooseneck section of the marine riser, the cross-section of the protective cover perpendicular to the gooseneck section of the riser is an isosceles trapezoid, and the top wall thickness of the protective cover is greater than the wall thickness of the two waist-shaped side walls.

[0007] In the above-mentioned specific embodiment of the protective device for the gooseneck section of the marine riser, the spoiler assembly includes a plurality of spoiler blocks that can be spliced ​​and combined along the length direction of the riser gooseneck section, and the spoiler blocks are provided with an arc structure to change the flow direction of the incoming ocean current so that it flows upward.

[0008] In the above-mentioned specific embodiment of the protective device for the gooseneck section of the marine riser, the spoiler includes a support frame and a plurality of curved plates, the curved plates are provided with a plurality of water-permeable holes, the plurality of curved plates are fixed on the support frame in an inclined manner and the inclination angle of each curved plate is the same. When the spoiler is placed on the peripheral part of the protective outer cover, the plurality of curved plates are arranged in sequence in a direction gradually approaching the protective outer cover to change the flow direction of the incoming ocean current so that it flows upward.

[0009] In the above-mentioned specific embodiment of the protective device for the gooseneck section of the marine riser, the diameters of the water holes on the multiple curved plates are different and decrease in sequence according to the arrangement order of the curved plates. The curved plate with the water holes with the largest diameter is located on the outermost side, and the water holes on two adjacent curved plates are arranged in a staggered manner.

[0010] In the above-mentioned specific embodiment of the protective device for the gooseneck section of the marine riser, the support frame is a right-angle frame, one end of the curved plate is fixedly connected to a right-angle wall of the support frame, and the other end of the curved plate is fixedly connected to another right-angle wall of the support frame. A connecting block is fixed to one side end of the support frame, and a connecting socket that cooperates with the connecting block is fixed to the other side end of the support frame. Two adjacent spoiler blocks are spliced ​​and combined by inserting the connecting block into the connecting socket.

[0011] In the above-mentioned specific embodiment of the protective device for the gooseneck section of the marine riser, the support frame includes a base plate and a vertical plate, the bottom end of the vertical plate is fixed to the base plate, one end of the curved plate is fixedly connected to the vertical plate, and the other end of the curved plate is fixedly connected to the base plate, and the connecting block and the connecting socket are respectively fixed on the two side walls of the base plate.

[0012] In the above-mentioned specific embodiment of the protective device for the gooseneck section of the marine riser, spoiler components are respectively placed along the peripheral portions of the two side walls of the protective cover that are consistent with the length direction of the gooseneck section of the riser.

[0013] In the above-mentioned specific embodiment of the protective device for the gooseneck section of the marine riser, a pressure sensor is fixed on the top end of the protective outer cover.

[0014] In a specific embodiment of the protective device for the gooseneck section of a marine riser, a stabilizing assembly is provided on the inner side of the protective outer cover. The stabilizing assembly includes at least one pair of damping rods. Each pair of damping rods is located on both sides of the riser gooseneck section and is symmetrically distributed. One end of the damping rod is hingedly connected to the side wall of the protective outer cover, and the other end of the damping rod rests on the riser gooseneck section. Each pair of damping rods clamps the riser gooseneck in the middle to generate a damping force thereon.

[0015] In the above-mentioned specific embodiment of the protective device for the gooseneck section of the marine riser, the damping rod includes a rod body, a splint and a spring. One end of the rod body is hingedly connected to the side wall of the protective outer cover. The interior of the rod body is a hollow structure. The spring is arranged in the rod body and one end is fixedly connected to the rod body. The other end of the spring extends out of the rod body and is fixedly connected to the splint. The splint is pressed against the side wall of the gooseneck section of the riser under the action of the elastic force of the spring.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The protective cover covers the gooseneck section of the riser, which protects the structure inside the protective cover, prevents foreign objects from falling directly on the gooseneck section of the riser and damaging it, and also prevents ocean currents from directly scouring the gooseneck section of the riser, thus playing a protective role. In addition, spoiler components are arranged around the protective cover to change the flow direction of the incoming ocean current and make it flow upward, reducing the sediment scouring effect on the gooseneck section of the riser.

[0018] 2. The pressure sensor built into the protective cover is used for real-time monitoring. When the protective device encounters a sudden external force impact, such as falling objects, or suffers potential damage, the pressure sensor can respond immediately, collect relevant data and send it to the smart terminal, providing data support for maintenance decisions, and comprehensively improving the safety level and operation and maintenance efficiency of marine engineering.

[0019] 3. A stabilizing component is set inside the protective cover. By connecting the riser gooseneck and the protective cover, the vibration amplitude of the riser gooseneck section can be significantly reduced, and the stability of the overall structure can be enhanced.

[0020] 4. The spoiler assembly is composed of multiple spoiler blocks spliced ​​together and can be easily assembled and disassembled, which not only greatly shortens the on-site construction time and reduces the operation cost, but also provides convenience for subsequent maintenance and recycling and reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0022] Figure 1 This is a diagram of the installation status of the riser gooseneck section on the seabed;

[0023] Figure 2 Schematic diagram of the overall structure of the protective device for the gooseneck section of the marine riser provided by the present invention;

[0024] Figure 3 It is a schematic diagram of the structure inside the protective cover;

[0025] Figure 4 It is a schematic diagram of the structure of the spoiler block;

[0026] Figure 5 It is a structural diagram of the location of the connection socket;

[0027] Figure 6 It is a structural diagram of the damping rod.

[0028] List of reference numerals:

[0029] 1. Pile foundation; 2. Riser gooseneck section; 3. Concrete support platform; 4. Seabed; 5. Protective cover; 6. Spoiler assembly; 601. Curved plate; 602. Water-permeable hole; 603. Connecting block; 604. Support frame, 605. Connecting socket; 7. Stabilizing assembly; 701. Articulated seat; 702. Damping rod; 7021. Rod body; 7022. Spring; 7023. Clamp; 7024. Flexible pad; 8. Pressure sensor. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the systems or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing those components. Unless otherwise stated, these terms have no special meanings and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] The present invention relates to the field of marine engineering technology, and in particular to a protective device for the gooseneck section of a marine riser. The device aims to address the following issues with existing riser goosenecks: First, the riser gooseneck is subject to long-term seawater erosion, which can easily form scour pits. This can lead to loss of support and changes in the overall stress state of the riser gooseneck. This can cause pipeline vibration and even fatigue failure due to the continuous scouring of ocean currents. Second, the riser gooseneck is located close to the bottom of the jacket, exposing a significant risk of falling objects and potential third-party damage. To this end, the protective device for the gooseneck section of the marine riser provided by the present invention includes a protective cover and a spoiler assembly. The protective cover is covered on the outside of the riser gooseneck to cover it, and the spoiler assembly is arranged on the peripheral part of the outside of the protective cover. The spoiler assembly is configured to slow down the scouring force of the ocean current on the base of the riser gooseneck and the protective cover by changing the direction and speed of the ocean current. The riser gooseneck section is covered by the protective cover, which protects the structure inside the protective cover, avoids the problem of foreign objects falling directly on the riser gooseneck section and damaging it, and avoids the ocean current directly scouring the riser gooseneck section, thereby playing a protective role; in addition, the spoiler assembly is arranged around the protective cover, which can change the flow direction of the incoming ocean current to make it flow upward, reducing the sediment scouring effect of the riser gooseneck section.

[0034] The protective device for the gooseneck section of a marine riser provided by an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Figure 1 This is a diagram showing the installation status of the riser gooseneck section on the seabed. The riser is installed on pile foundation 1, and the riser gooseneck section 2 is shown in the figure. A concrete support platform is located below the riser gooseneck section to support the riser. The concrete support platform is installed on the seabed.

[0036] See Figure 2 The present invention provides a protective device for the gooseneck section 2 of a marine riser, comprising a protective outer cover 5 and a spoiler assembly 6. The protective outer cover 5 is covered on the outside of the riser gooseneck to cover it, and the spoiler assembly 6 is arranged on the peripheral portion of the outer side of the protective outer cover 5. The spoiler assembly is configured to reduce the scouring force of the ocean current on the base of the riser gooseneck and the protective outer cover 5 by changing the direction and speed of the ocean current.

[0037] Specifically, if Figure 2 As shown, the cross-section of the protective cover 5 perpendicular to the riser gooseneck section 2 is an isosceles trapezoid, ensuring the stability of the protective device on the seabed. The top wall thickness of the protective cover 5 is greater than that of the two waist-shaped side walls, which better conforms to the stress characteristics of the protective device subjected to external impacts. The top of the protective cover 5 can be made of materials such as fiberglass reinforced plastic, which provides a certain degree of cushioning when external forces impact the protective device. To ensure that the protective cover 5 completely covers the riser gooseneck section 2, a notch is provided in the protective cover 5 where the riser gooseneck section 2 passes, thereby achieving the purpose of allowing the riser gooseneck section 2 to pass through.

[0038] In one embodiment, see Figure 3 A pressure sensor 8 is fixed to the top of the protective housing 5. Pressure sensor 8 can be wirelessly connected to a smart terminal, transmitting detected data to the terminal, enabling monitoring of external forces on the pipeline. When the protective device encounters a sudden external impact, such as a falling object, or potential damage, pressure sensor 8 can respond immediately, collecting relevant data and transmitting it to the smart terminal. This data supports maintenance decisions, comprehensively improving the safety level and operational efficiency of marine engineering. The smart terminal can be a computer device.

[0039] In one embodiment, see Figure 2 and Figure 4 The spoiler assembly 6 comprises multiple spoiler blocks that can be assembled along the length of the riser gooseneck section 2. These blocks are equipped with curved structures to redirect incoming ocean currents upward. The spoiler blocks, backed by the protective housing 5, are curved in shape, better matching the current gradient of the submarine current and redirecting it upward.

[0040] In the above embodiment, preferably, refer to Figure 4 The spoiler includes a support frame 604 and a plurality of curved plates 601. The curved plates 601 are provided with a plurality of water-permeable holes 602. The plurality of curved plates 601 are fixed on the support frame 604 in an inclined manner and the inclination angle of each curved plate 601 is the same. When the spoiler is placed on the peripheral part of the protective cover 5, the plurality of curved plates 601 are arranged in a direction gradually approaching the protective cover 5 to change the flow direction of the incoming ocean current so that it flows upward.

[0041] In the above embodiment, the curvature of the curved plate does not exceed π / 2, and the inclination angle of the curved plate is preferably between 30° and 60°. Due to the provision of curved plate 601, the flow of ocean currents is redirected upwards by curved plate 601. The combination of curved plate 601 and permeable holes 602 cleverly alters the direction and intensity of the water flow, reducing the erosion of the ocean current on the riser gooseneck base and protective structure, and preventing the problem of suspension caused by sediment scouring.

[0042] In the above embodiment, preferably, Figure 4 As shown, the diameters of the water holes 602 on the multiple curved plates 601 vary and decrease in size as the curved plates 601 are arranged. The curved plate 601 with the largest diameter water holes 602 is located on the outermost side, and the water holes 602 on two adjacent curved plates 601 are arranged in a staggered manner. This maximizes the attenuation of ocean current energy by the spoiler.

[0043] In one embodiment, see Figure 4-5The support frame 604 is a right-angle frame. One end of the curved plate 601 is fixedly connected to a right-angle wall of the support frame 604, and the other end of the curved plate 601 is fixedly connected to another right-angle wall of the support frame 604. A connecting block 603 is fixed to one end of the support frame 604, and a connecting socket 605 that cooperates with the connecting block 603 is fixed to the other end of the support frame 604. Two adjacent spoiler blocks are spliced ​​and combined by inserting the connecting block 603 into the connecting socket 605, and the connecting block is inserted into the connecting socket and is in a clamping state. In order to make each curved plate 601 in an inclined state with the same tilt angle, the width of the multiple curved plates 601 gradually decreases in the direction of gradually approaching the support frame 604, such as Figure 4 shown.

[0044] Specifically, the support frame 604 includes a bottom plate and a vertical plate. The vertical plate is vertically fixed to the bottom plate to form a right-angle frame. One end of the curved plate 601 is fixedly connected to the vertical plate, and the other end of the curved plate 601 is fixedly connected to the bottom plate. The connecting block 603 and the connecting socket can be fixed to the vertical plate or the bottom plate. Figure 4 As shown, for example, the connecting blocks 603 and the connecting sockets are respectively fixed to the two side walls of the base plate. The number of connecting blocks 603 and the connecting sockets on each support frame 604 is the same and corresponds one to one. This application does not limit the specific number of connecting blocks 603 and connecting sockets, and it can be flexibly set according to actual usage.

[0045] The material selected for the spoiler needs to have good corrosion resistance and long life, and can maintain its original physical and chemical properties even after long-term immersion in the ocean. For example, it can be stainless steel or fiberglass.

[0046] In addition, it should be noted that the present application does not impose any specific limitation on the number of the arc-shaped plates 601 in the spoiler, and the number can be flexibly adjusted according to the energy of the on-site ocean current.

[0047] In one embodiment, see Figure 2 , spoiler assemblies 6 are placed along the periphery of both side walls of the protective cover 5, which are aligned with the length direction of the riser gooseneck section 2. It should be noted that the above is merely an example, and the present application does not specifically limit the distribution of the spoiler assemblies 6 around the outer periphery of the protective cover 5. Spoiler assemblies 6 can also be placed on all four peripheries of the outer periphery of the protective cover 5.

[0048] In one embodiment, see Figure 3A stabilizing assembly 7 is disposed inside the protective housing 5. The stabilizing assembly 7 includes at least one pair of damping rods 702. Each pair of damping rods includes two damping rods. Each pair of damping rods 702 is symmetrically located on either side of the riser gooseneck section 2. One end of each damping rod 702 is hingedly connected to the sidewall of the protective housing 5, and the other end of the damping rod 702 abuts against the riser gooseneck section 2. Each pair of damping rods 702 clamps the riser gooseneck section 2 to generate a damping force. This application does not impose any specific restrictions on the number of pairs of damping rods, and the number may be flexibly set based on actual conditions, such as three, four, five, or six pairs.

[0049] In the above embodiment, preferably, refer to Figure 6 Damping rod 702 comprises a rod body 7021, a clamping plate 7023, and a spring 7022. One end of rod body 7021 is hingedly connected to the side wall of protective housing 5. Rod body 7021 is hollow. Spring 7022 is disposed within rod body 7021, with one end fixedly connected thereto. The other end of spring 7022 extends outside rod body 7021 and is fixedly connected to clamping plate 7023. Clamping plate 7023, under the elastic force of spring 7022, abuts against the side wall of riser gooseneck section 2. The provision of spring 7022 enhances its energy absorption and release capabilities, effectively suppressing the vibration amplitude of riser gooseneck section 2, thereby reducing the vibration amplitude and enhancing the overall stability and durability of the structure.

[0050] Specifically, a flexible pad 7024 is fixed to the end surface of the clamping plate 7023 that contacts the riser gooseneck section 2. This significantly reduces the friction coefficient between the damping rod 702 and the riser gooseneck section 2, thus preventing wear during long-term operation. A hinged seat 701 is fixed to the inner wall of the protective housing 5. One end of the rod 7021 is hingedly connected to the hinged seat 701, allowing the rod 7021 to rotate relative to the protective housing 5, facilitating adjustment of the damping rod 702's tilt angle for optimal vibration reduction.

[0051] In this application, fiberglass can be selected as the material of the main body of the protective device, which not only gives the device excellent impact resistance and effectively resists the potential threat of falling objects in the ocean, but also ensures its light weight and corrosion resistance.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A protective device for the gooseneck section of a marine riser, characterized in that: The invention also provides a plurality of spoiler components, and the spoiler components are provided on the peripheral part of the outer side of the protective cover, and the spoiler components are configured to slow down the scouring force of the ocean current on the base of the riser gooseneck and the protective cover by changing the direction and speed of the ocean current. The spoiler component includes a plurality of spoiler blocks that can be spliced ​​and combined along the length direction of the riser gooseneck section. The surface of the spoiler block facing away from the riser gooseneck section is arc-shaped to change the direction of the incoming ocean current so that it flows upward. The spoiler block includes a support frame and a plurality of arc plates, and a plurality of water-permeable holes are provided on the arc plates. The plurality of arc plates are all fixed on the support frame in an inclined manner and the inclination angle of each arc plate is the same. When the spoiler block is placed on the peripheral part of the protective cover, the plurality of arc plates gradually approach the protective cover. The directions are arranged in sequence to change the flow direction of the incoming ocean current and make it flow upward. A stabilizing component is provided on the inner side of the protective outer cover, and the stabilizing component includes at least one pair of damping rods, each pair of damping rods is located on both sides of the riser gooseneck section and is symmetrically distributed, one end of the damping rod is hingedly connected to the side wall of the protective outer cover, and the other end of the damping rod is against the riser gooseneck section, each pair of damping rods clamps the riser gooseneck in the middle to generate a damping force thereon, and the damping rod includes a rod body, a splint and a spring, one end of the rod body is hingedly connected to the side wall of the protective outer cover, the interior of the rod body is a hollow structure, the spring is arranged in the rod body and one end of it is fixedly connected to it, the other end of the spring extends out of the rod body and is fixedly connected to the splint, and the splint is against the side wall of the riser gooseneck section under the action of the spring elastic force.

2. The protective device for the gooseneck section of a marine riser according to claim 1, characterized in that: The cross-section of the protective outer cover perpendicular to the gooseneck section of the riser is an isosceles trapezoid, and the thickness of the top wall of the protective outer cover is greater than the thickness of the two waist-shaped side walls.

3. The protective device for the gooseneck section of a marine riser according to claim 1, characterized in that: The diameters of the water holes on the multiple curved plates are different and decrease in sequence according to the arrangement of the curved plates. The curved plate with the water holes with the largest diameter is located on the outermost side, and the water holes on two adjacent curved plates are arranged in a staggered manner.

4. The protective device for the gooseneck section of a marine riser according to claim 3, characterized in that: The support frame is a right-angle frame, one end of the curved plate is fixedly connected to a right-angle wall of the support frame, and the other end of the curved plate is fixedly connected to another right-angle wall of the support frame. A connecting block is fixed to one side end of the support frame, and a connecting socket that cooperates with the connecting block is fixed to the other side end of the support frame. Two adjacent spoiler blocks are spliced ​​and combined by inserting the connecting block into the connecting socket.

5. The protective device for the gooseneck section of a marine riser according to claim 1, characterized in that: The protective outer cover is provided with spoiler components along the periphery of the two side walls which are consistent with the length direction of the gooseneck section of the riser.

6. The protective device for the gooseneck section of a marine riser according to claim 1, characterized in that: A pressure sensor is fixed on the top end of the protective cover.

Images