A vortex-induced vibration suppression device

Abstract

The present application provides a kind of vortex-induced vibration suppression device, belong to marine drilling technology field.The vortex-induced vibration suppression device includes strip flow guide component and at least two fixed plates.The fixed plate of the present application is equipped with the mounting hole for being connected with pipe string, the fixed plate can be installed to pipe string by mounting hole, meanwhile, the fixed plate is equipped with flow guide hole, the axis of multiple fixed plate flow guide holes coincides and the axis is parallel to the radial direction of pipe string, strip flow guide component is sequentially inserted in multiple flow guide holes, strip flow guide component is parallel to pipe string, strip flow guide component is arranged with the installation place on pipe string, so that strip flow guide component changes flow field to the vortex formed by water flow at the water flow blowing place of pipe string, reduces the pressure fluctuation of pipe string surface, so that the vortex-induced vibration of whole pipe string can be effectively inhibited, the device structure is simple, can realize the inhibition function of the vortex-induced vibration of whole pipe string, effectively reduces the input cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of offshore drilling technology, and particularly relates to a vortex-induced vibration suppression device. BACKGROUND

[0002] The Karman vortex street of the bluff body tail causes the periodically changed fluid action force, and the fluid action force is applied to the structure, that is, the displacement, vibration and deformation response of the structure are caused, and the vibration response of the structure caused by the alternately shedding vortex is called vortex-induced vibration. For the cylindrical section structure commonly used in offshore engineering, such as a drilling string, as a key component for ensuring the normal operation of deep-sea oil and gas exploration and development, the vortex-induced vibration problem caused by the wave flow action is encountered in service. When the vortex-induced vibration frequency is close to the natural frequency of the pipe string, resonance occurs, which seriously affects the use strength and service life of the pipe string. In the deep water environment, the marine environmental load borne by the pipe string is mainly the action of the water flow, when the water flow passes through the pipe string, the vortex alternately sheds on the pipe string, thereby generating the periodically changed action force on the pipe string. Generally, the deep-sea pipe string has a low base frequency vibration frequency, under the vortex action of the water flow, the pipe string is prone to vortex-induced vibration phenomenon, causing large vibration of the pipe string structure, and even causing collision between the pipe strings and fatigue failure. Therefore, the corresponding device needs to be provided for the pipe string to suppress the vortex-induced vibration, so as to reduce the damage to the drilling string.

[0003] Chinese patent CN105201420A, published on March 22, 2017, discloses an active vortex-induced vibration suppression device, belonging to the field of offshore riser vortex-induced vibration suppression devices. The device comprises a fixed seat, a leaf type rotating body, a rotating seat, a rotating seat cover, an outer guide plate, an inner guide plate, a transmission shaft, two leaf type rotating bodies are installed on the fixed seat of the limiting clamp device, the rotating seat and the rotating seat cover are connected through bolts and are installed on the fixed seat of the limiting clamp device, the gear end of the transmission shaft is engaged with the gear end of the leaf type rotating body, the middle part of the transmission shaft is combined with the bearing and is installed on the support seat, the support seat and the support seat cover are connected through bolts, the impeller is installed on the smooth end of the transmission shaft through the key groove and the nut and is placed in the pump cylinder, the cover plate is connected with the impeller pump cylinder through bolts, the outer guide plate is hinged with the rotating seat, one end of the inner guide plate is embedded in the inner side of the outer guide plate, and the other end is hinged with the push rod. The prior art has a clever structure design and high use value, and can better suppress the vortex-induced vibration of the offshore riser under high and low flow rates. The drilling string in the above patent is relatively long, so multiple suppression devices need to be arranged along the length direction of the drilling string to realize the protection of the whole drilling string, and the investment cost is too high. SUMMARY

[0004] The present application aims at the deficiencies of the prior art, and provides a vortex-induced vibration suppression device.

[0005] The application provides a vortex-induced vibration suppression device for suppressing vortex-induced vibration of a pipe column, comprising a strip-shaped flow guide assembly and at least two fixing plates arranged in parallel along the length direction of the pipe column, the fixing plate comprises a flow guide hole and a mounting hole for connecting with the pipe column, the flow guide hole is communicated with the mounting hole, the axes of the flow guide holes on the plurality of fixing plates coincide and are parallel to the radial direction of the pipe column, and the strip-shaped flow guide assembly is sequentially inserted into the plurality of flow guide holes; the strip-shaped flow guide assembly is parallel to the pipe column, the pipe column is provided with a water flow blowing position directed by water flow and a mounting position symmetrically arranged with the water flow blowing position, and the strip-shaped flow guide assembly is arranged in close contact with the mounting position on the pipe column, so that the strip-shaped flow guide assembly changes the vortex formed by the water flow at the water flow blowing position of the pipe column.

[0006] Further, the diameter of the strip-shaped flow guide assembly is smaller than the diameter of the pipe column.

[0007] Further, the flow guide hole on each fixing plate is a plurality of flow guide holes, and the strip-shaped flow guide assembly is a plurality of strip-shaped flow guide assemblies, the plurality of strip-shaped flow guide assemblies are arranged corresponding to the plurality of flow guide holes on each fixing plate, and the strip-shaped flow guide assembly is arranged in close contact with the pipe column when the strip-shaped flow guide assembly is inserted into the flow guide hole communicated with the mounting hole.

[0008] Further, the plurality of flow guide holes are arranged on one side of the pipe column, the plurality of flow guide holes are sequentially arranged along the radial direction of the pipe column and away from the pipe column, one flow guide hole close to the pipe column is communicated with the mounting hole, the hole diameters of the plurality of flow guide holes gradually decrease along the direction away from the pipe column, and any two adjacent strip-shaped flow guide assemblies are arranged in close contact.

[0009] Further, one flow guide hole is located on one side of the pipe column and communicated with the mounting hole, the remaining flow guide holes are located on the other side of the pipe column and communicated with the mounting hole, the remaining flow guide holes are sequentially arranged along the radial direction of the pipe column and away from the pipe column, the hole diameters of the remaining flow guide holes gradually decrease along the direction away from the pipe column, any two adjacent strip-shaped flow guide assemblies are arranged in close contact, and the line connecting the center points of all flow guide holes is parallel to the radial direction of the pipe column.

[0010] Further, the plurality of flow guide holes are uniformly arranged along the circumferential direction of the pipe column, and each flow guide hole is communicated with the mounting hole.

[0011] Further, the fixing plate comprises two clamping plates symmetrically arranged, the two clamping plates are detachably connected, and the mounting hole and the flow guide hole are formed when the two clamping plates abut against each other.

[0012] Further, the flow guide hole is a circular hole, and the cross section of the strip-shaped flow guide assembly is circular.

[0013] Further, the guide hole is triangular, and the cross section of the strip-shaped flow guide assembly is triangular.

[0014] Further, at least two of the fixing plates are arranged at two ends of the pipe column respectively, and the length of the strip-shaped flow guide assembly is the same as the length of the pipe column.

[0015] The vortex-induced vibration suppression device has the following beneficial effects:

[0016] The fixing plate is provided with a mounting hole for cooperating with the pipe column, and the fixing plate can be mounted on the pipe column through the mounting hole. Meanwhile, the fixing plate is provided with a guide hole, the axes of the guide holes of the plurality of fixing plates coincide and are parallel to the radial direction of the pipe column, the strip-shaped flow guide assembly is sequentially inserted into the plurality of guide holes, the strip-shaped flow guide assembly is parallel to the pipe column, and the strip-shaped flow guide assembly is arranged in close contact with the mounting position on the pipe column, so that the strip-shaped flow guide assembly changes the flow field of the vortex formed by the water flow at the water flow blowing position of the pipe column, reduces the pressure fluctuation on the surface of the pipe column, and effectively suppresses the vortex-induced vibration of the whole pipe column. The device has a simple structure and can realize the function of suppressing the vortex-induced vibration of the whole pipe column, effectively reducing the investment cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application. In these drawings, like reference numerals are used to represent similar elements. The drawings in the following description are some embodiments of the present application, not all embodiments. For those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0018] Fig. 1 The low-cost vortex-induced vibration suppression device provided for the embodiments of the present application has a schematic structural diagram as a whole;

[0019] Fig. 2 The low-cost vortex-induced vibration suppression device provided for the embodiments of the present application has a schematic structural diagram of a fixing plate;

[0020] Fig. 3 The low-cost vortex-induced vibration suppression device provided for the embodiments of the present application has a schematic structural diagram of another fixing plate.

[0021] In the drawings: 100-pipe column, 200-fixing plate, 210-mounting hole, 220-guide hole, 300-strip-shaped flow guide assembly. DETAILED DESCRIPTION

[0022] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall into the scope of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in any manner without conflict.

[0023] Please refer to Figs. 1-3 The vortex-induced vibration suppression device of the embodiment of the present application is used for suppressing vortex-induced vibration of the tubular column 100, and comprises a strip-shaped flow guide assembly 300 and at least two fixing plates 200 which are arranged in parallel along the length direction of the tubular column 100 in sequence. The fixing plate 200 comprises a flow guide hole 220 and a mounting hole 210 used for cooperating with the tubular column 100. The flow guide hole 220 is communicated with the mounting hole 210. The axes between the flow guide holes 220 on the plurality of fixing plates 200 coincide and are parallel to the radial direction of the tubular column 100. The strip-shaped flow guide assembly 300 is inserted into the plurality of flow guide holes 220 in sequence. The strip-shaped flow guide assembly 300 is parallel to the tubular column 100. The tubular column 100 is provided with a water flow blowing position where the water flow is directed and a mounting position which is symmetrically arranged with the water flow blowing position. The strip-shaped flow guide assembly 300 is arranged in close contact with the mounting position on the tubular column 100, so that the strip-shaped flow guide assembly 300 changes the flow field of the vortex formed by the water flow at the water flow blowing position of the tubular column 100.

[0024] Here, the fixing plate 200 is a structure used for mounting the strip-shaped flow guide assembly 300 to the tubular column 100, and comprises at least two fixing plates 200 which are arranged in parallel along the length direction of the tubular column 100 in sequence. The at least two fixing plates 200 are each provided with a mounting hole 210 used for cooperating with the tubular column 100, so that the fixing plate 200 can be mounted to the tubular column 100. Meanwhile, the at least two fixing plates 200 are each provided with a flow guide hole 220. The axes between the flow guide holes 220 on the at least two fixing plates 200 coincide and are parallel to the radial direction of the tubular column 100. The strip-shaped flow guide assembly 300 is arranged through the plurality of flow guide holes 220 in sequence. The strip-shaped flow guide assembly 300 is parallel. The strip-shaped flow guide assembly 300 is arranged in close contact with the mounting position on the tubular column 100. The strip-shaped flow guide assembly 300 forms a structure which is in close contact with the side wall of the entire tubular column 100. The strip-shaped flow guide assembly 300 changes the flow field of the water flow and further changes the pressure fluctuation on the surface of the tubular column 100, so as to effectively suppress the vortex-induced vibration of the entire tubular column 100.

[0025] The diameter of the strip-shaped flow guide assembly 300 can be smaller than the diameter of the tubular column 100.

[0026] Specifically, by setting the diameter of the strip-shaped flow guide assembly 300 to be smaller than the diameter of the pipe column 100, the vortex-induced vibration of the entire pipe column 100 can be effectively inhibited.

[0027] Specifically, it can be understood that the number of the fixed plates 200 can be two, and when the length of the pipe column 100 is longer, a larger number of fixed plates 200 should be provided to ensure the relative position between the strip-shaped flow guide assembly 300 and the pipe column 100 and prevent the strip-shaped flow guide assembly 300 from being offset relative to the pipe column 100. In some embodiments, the number of the strip-shaped flow guide assemblies 300 is one, and the strip-shaped flow guide assembly 300 is arranged on the other side of the pipe column 100 where the water flow is directed.

[0028] The flow guide holes 220 on each fixed plate 200 can be multiple, and the strip-shaped flow guide assemblies 300 are multiple and correspondingly arranged with the multiple flow guide holes 220 on each fixed plate 200, and the strip-shaped flow guide assembly 300 is arranged in close contact with the pipe column 100 when the strip-shaped flow guide assembly 300 is inserted into the flow guide hole 220 in communication with the mounting hole 210.

[0029] Referring to Fig. 2 , multiple flow guide holes 220 can be arranged on one side of the pipe column 100, and the multiple flow guide holes 220 are arranged in sequence along the radial direction of the pipe column 100 and away from the pipe column 100, wherein one flow guide hole 220 close to the pipe column 100 is in communication with the mounting hole 210, the hole diameter of the multiple flow guide holes 220 gradually decreases along the direction away from the pipe column 100, and any two adjacent strip-shaped flow guide assemblies 300 are arranged in close contact.

[0030] Specifically, in one embodiment, the number of the flow guide holes 220 on each fixed plate 200 is multiple, and the multiple flow guide holes 220 are arranged in sequence along the vertical direction and away from the pipe column 100, and the hole diameter of the multiple flow guide holes 220 on each fixed plate 200 gradually decreases along the direction away from the pipe column 100, the number of the strip-shaped flow guide assemblies 300 is multiple and corresponds to the multiple flow guide holes 220 on each fixed plate 200 one by one, and the two adjacent strip-shaped flow guide assemblies 300 are arranged in close contact. The multiple strip-shaped flow guide assemblies 300 form a wing-shaped wake cover structure in the vortex-induced vibration suppression device for large-scale jacket construction as proposed in the Chinese invention patent with the application number CN201510609415.3, thereby realizing the function of inhibiting vortex-induced vibration.

[0031] Referring to Fig. 3A flow guide hole 220 is located on one side of the pipe column 100 and communicates with the mounting hole 210, the remaining flow guide holes 220 are located on the other side of the pipe column 100 and are close to a flow guide hole 220 of the pipe column 100, the remaining flow guide holes 220 are arranged in turn along the radial direction of the pipe column 100 and away from the pipe column 100, and the hole diameter of the remaining flow guide holes 220 gradually decreases along the direction away from the pipe column 100, and any two adjacent strip-shaped flow guide assemblies 300 are arranged in close contact, and the connecting line of the center points of all flow guide holes 220 is parallel to the radial direction of the pipe column 100.

[0032] Specifically, in another embodiment, the number of flow guide holes 220 on each fixed plate 200 is multiple, one flow guide hole 220 is located on one side of the pipe column 100, and the remaining flow guide holes 220 are arranged in turn along the direction perpendicular to and away from the pipe column 100, the hole diameter of the remaining flow guide holes 220 gradually decreases along the direction away from the pipe column 100, the number of strip-shaped flow guide assemblies 300 is multiple and corresponds to the multiple flow guide holes 220 on each fixed plate 200 one by one, and any strip-shaped flow guide assembly 300 is arranged in close contact with the adjacent strip-shaped flow guide assembly 300 and / or the pipe column 100. The multiple strip-shaped flow guide assemblies 300 form a fairing structure in the fairing and active suppression combined riser vortex-induced vibration suppression device as proposed in the Chinese utility model patent with application number CN201720113456.8, thereby realizing the function of suppressing vortex-induced vibration.

[0033] The multiple flow guide holes 220 are uniformly arranged along the circumferential direction of the pipe column 100, and each flow guide hole 220 communicates with the mounting hole 210.

[0034] Specifically, in another embodiment, the number of flow guide holes 220 on each fixed plate 200 is multiple, the multiple flow guide holes 220 are uniformly arranged along the circumferential direction of the pipe column 100, the number of strip-shaped flow guide assemblies 300 is multiple and corresponds to the multiple flow guide holes 220 on each fixed plate 200 one by one, and each strip-shaped flow guide assembly 300 is in close contact with the pipe column 100. The multiple strip-shaped flow guide assemblies 300 form the multiple wing plates in the omni-directional wrapping power transmission and transformation steel pipe component vortex-induced vibration suppression device as proposed in the Chinese invention application with application number CN202010921322.5.

[0035] The fixed plate 200 can include two clamping plates arranged symmetrically, the two clamping plates are detachably connected, and the two clamping plates abut against each other to form the mounting hole 210 and the flow guide hole 220.

[0036] Specifically, in order to facilitate the installation of the fixing plate 200 to the pipe column 100, in an embodiment, the fixing plate 200 comprises two clamping plates arranged oppositely, the two clamping plates are detachably connected, and the installation hole 210 and the flow guide hole 220 are formed between the abutting surfaces of the two clamping plates. In order to facilitate the adaptation to the flow direction of seawater, the fixing plate 200 and the pipe column 100 can be rotatably connected in the circumferential direction. Of course, in other embodiments, the fixing plate 200 can also adopt other forms of structures instead, and the embodiments of the present application do not limit this.

[0037] The flow guide hole 220 can be a circular hole, and the cross section of the strip-shaped flow guide assembly 300 is circular.

[0038] The flow guide hole 220 can be a triangular hole, and the cross section of the strip-shaped flow guide assembly 300 is triangular.

[0039] At least two fixing plates 200 can be arranged at the two ends of the pipe column 100 respectively, and the length of the strip-shaped flow guide assembly 300 is the same as the length of the pipe column 100.

[0040] Specifically, the length of the strip-shaped flow guide assembly 300 is adapted to the length of the pipe column 100 to achieve the suppression of vortex-induced vibration of the whole pipe column 100.

[0041] Specifically, in some embodiments, the strip-shaped flow guide assembly 300 should be made of waterproof and durable materials. In an embodiment, the strip-shaped flow guide assembly 300 is made of hard materials, such as PVC pipes, stainless steel pipes, etc., which have high structural strength and long service life. In another embodiment, the strip-shaped flow guide assembly 300 is made of flexible materials, such as nylon ropes, etc., which are easy to install and low in cost. In some embodiments, the shape of the strip-shaped flow guide assembly 300 is not limited.

[0042] Compared with the prior art, at least two fixing plates 200 are provided with installation holes 210 for cooperating with the pipe column 100, so that the fixing plate 200 can be installed to the pipe column 100, and at least two fixing plates 200 are provided with flow guide holes 220, the axes of the flow guide holes 220 of the at least two fixing plates 200 coincide and are parallel to the radial direction of the pipe column 100, the strip-shaped flow guide assembly 300 passes through the flow guide holes 220 in sequence, the strip-shaped flow guide assembly 300 is parallel to and attached to the pipe column 100, the strip-shaped flow guide assembly 300 forms a structure attached to the whole side wall of the pipe column 100, and the diameter of the strip-shaped flow guide assembly 300 is smaller than the diameter of the pipe column 100, so that the vortex-induced vibration of the whole pipe column 100 can be effectively suppressed. The device has a simple structure and can realize the suppression function of the vortex-induced vibration of the whole pipe column 100, effectively reducing the investment cost.

[0043] The above-described content can be implemented individually or in various combinations, and these variants are within the protection scope of the present application.

[0044] It should be noted that in the description of the present application, the terms "upper end", "lower end", "bottom end" indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device containing a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including one" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0045] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limiting. Although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A vortex-induced vibration suppression device for suppressing vortex-induced vibration of a tubular column (100), characterized by: The strip-shaped flow guide assembly (300) and at least two fixed plates (200) arranged in parallel along the length direction of the pipe column (100) in sequence, the fixed plate (200) comprises a flow guide hole (220) and a mounting hole (210) used for cooperating with the pipe column (100), the flow guide hole (220) is communicated with the mounting hole (210), the axes of the flow guide holes (220) on the plurality of fixed plates (200) coincide and are parallel to the radial direction of the pipe column (100), and the strip-shaped flow guide assembly (300) is inserted into the flow guide holes (220) in sequence; the strip-shaped flow guide assembly (300) is parallel to the pipe column (100), the pipe column (100) is provided with a water flow blowing position where the water flow is directed and a mounting position which is symmetrically arranged with the water flow blowing position, and the strip-shaped flow guide assembly (300) is arranged in close contact with the mounting position on the pipe column (100), so that the strip-shaped flow guide assembly (300) changes the flow field of the vortex formed by the water flow at the water flow blowing position of the pipe column (100); the flow guide hole (220) on each fixed plate (200) is a plurality of flow guide holes, the strip-shaped flow guide assembly (300) is a plurality of strip-shaped flow guide assemblies, the plurality of strip-shaped flow guide assemblies (300) are arranged correspondingly to the plurality of flow guide holes (220) on each fixed plate (200), and the strip-shaped flow guide assembly (300) is arranged in close contact with the pipe column (100) when the strip-shaped flow guide assembly (300) is inserted into the flow guide hole (220) communicated with the mounting hole (210); any two adjacent strip-shaped flow guide assemblies (300) are arranged in close contact, and the connecting line of the center points of all the flow guide holes (220) is parallel to the radial direction of the pipe column (100); The plurality of flow guide holes (220) are arranged on one side of the pipe column (100), and the plurality of flow guide holes (220) are arranged in sequence along the radial direction of the pipe column (100) and away from the pipe column (100), wherein one flow guide hole (220) close to the pipe column (100) is communicated with the mounting hole (210), and the diameters of the plurality of flow guide holes (220) gradually decrease along the direction away from the pipe column (100); Or One flow guide hole (220) is located on one side of the pipe column (100) and communicated with the mounting hole (210), and the remaining flow guide holes (220) are located on the other side of the pipe column (100) and communicated with the mounting hole (210) one by one away from the pipe column (100) along the radial direction of the pipe column (100), and the diameters of the remaining flow guide holes (220) gradually decrease along the direction away from the pipe column (100).

2. A vortex-induced vibration suppression device according to claim 1, wherein: The diameter of the strip-shaped flow guide assembly (300) is smaller than the diameter of the pipe column (100).

3. A vortex-induced vibration suppression device according to claim 1 or 2, characterised in that: The fixed plate (200) comprises two clamping plates arranged symmetrically, the two clamping plates are detachably connected, and the mounting hole (210) and the flow guide hole (220) are formed when the two clamping plates abut against each other.

4. A vortex-induced vibration suppression device according to claim 1 or 2, wherein: The flow guide hole (220) is a circular hole, and the cross section of the strip-shaped flow guide assembly (300) is circular.

5. A vortex-induced vibration suppression device according to claim 1 or 2, wherein: The flow guide hole (220) is triangular, and the cross section of the strip-shaped flow guide assembly (300) is triangular.

6. A vortex-induced vibration suppression device according to claim 1 or 2, wherein: At least two fixing plates (200) are arranged at two ends of the pipe column (100) respectively, and the length of the strip-shaped flow guide assembly (300) is the same as the length of the pipe column (100).

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