Prefabricated vibration-resistant wellbore structure

Abstract

The present invention discloses an assembled anti-vibration wellbore structure, which includes at least two wellbore standard sections that are detachably connected in the vertical direction, at least one detachable elastic damping device being suspended from each wellbore standard section, and a detachable damping anti-vibration counterweight being suspended from the bottom of the wellbore standard section at the bottom. On the one hand, the present invention standardizes the various components that make up the wellbore structure and can be prefabricated in a factory, effectively reducing the construction difficulty and improving the construction efficiency; on the other hand, the weight and center of gravity of the various components that make up the wellbore structure can be adaptively adjusted according to the actual anti-vibration requirements, thereby changing the natural frequency of the wellbore structure and avoiding resonance between the wellbore structure and the vibration source when the wellbore structure is disturbed by vibration; at the same time, a structure with a high damping effect can be formed on the outside and bottom of the wellbore structure, which can significantly absorb and reduce the vibration waves, so that the present invention can have good anti-vibration capabilities.

Description

Technical Field

[0001] The invention relates to the technical field of vertical shaft support, in particular to an assembled anti-vibration shaft structure. Background Art

[0002] A vertical shaft structure is a common engineering arrangement used to create vertical passageways in underground structures. It is widely used in water pipelines, rocket silos, mining shafts, ventilation shafts, and other engineering scenarios. These shafts are often subject to adverse vibration disturbances during operation, such as hydrodynamic pulsation, high-frequency vibrations during rocket launches, blasting vibrations, and wind whistling vibrations. In addition to these regular vibration disturbances, they may also experience sporadic, irregular vibration disturbances, such as earthquakes. If the shaft resonates with the vibration source, structural damage can easily occur.

[0003] Chinese patent publication CN110953434A discloses an oil and gas pipeline seismic protection device and system. The device comprises a support mechanism and a pipe clamping assembly disposed at the top of the support mechanism. The support mechanism comprises a bottom support column, a top support column, and support teeth. The bottom support column is provided with a spring. The bottom of the top support column is supported by the spring. The outer wall of the top support column is provided with multiple axially disposed slots, the slots opening in a diagonally downward direction. The bottom support column is provided with a receiving slot, in which the support teeth are rotatably connected, and the ends of the support teeth are retained in the slots. The receiving slots open in a diagonally upward direction, so that upward movement of the top support column causes the support teeth to swing in a fan-shaped diagonal upward direction. The oil and gas pipeline seismic protection device and system provided by this invention can lengthen the support mechanism while maintaining a certain supporting force when the ground moves downward, thereby providing seismic protection against downward ground movement.

[0004] The Chinese patent document with the announcement number CN211289020U discloses an anti-seismic support and hanger for anti-loosening pipes, which includes a mounting plate, two movable frames fixedly mounted on the left and right sides of the bottom of the mounting plate, a first return spring fixedly mounted on the top of the inner cavity of the two movable frames, and a movable block fixedly mounted on the bottom of the two first return springs. The anti-seismic support and hanger for anti-loosening pipes is provided with a first return spring and a shock-absorbing spring. When the bottom plate vibrates, most of the force will be offset by the interaction of the first return spring and the shock-absorbing spring via the first connecting rod and the movable block. When the upper and lower hangers vibrate, most of the force will be offset by the interaction of the second return spring and the spring plate via the second connecting rod and the movable seat, thereby achieving a good shock-absorbing effect and making the overall structure more stable.

[0005] The above patents all disclose technical solutions for shock-absorbing pipeline structures. The basic principles involved are to use shock-absorbing springs to support or hoist pipelines, and to reduce the vibration force of the pipelines through the elastic force of the shock-absorbing springs. The shock-absorbing springs need to withstand multiple forces, and the forces they withstand are relatively strong. The shock-absorbing structure needs to be maintained frequently to ensure its service life; and their solutions require the provision of a large number of external auxiliary structures and components, which makes the overall structure too complicated and the construction difficult. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an assembled anti-vibration shaft structure which is easy to construct and assemble and has good anti-vibration effect.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: an assembled anti-vibration wellbore structure, wherein the wellbore structure includes at least two wellbore standard sections that are detachably connected in the vertical direction, and each wellbore standard section is provided with at least one detachable elastic damping device suspended thereon, and a detachable damping anti-vibration counterweight is suspended thereon at the bottom of the wellbore standard section at the bottom. The wellbore structure is formed by assembling standardized wellbore standard sections, which can be prefabricated in a factory and only need to be assembled during on-site construction, effectively reducing the construction difficulty and improving the construction efficiency; by adding detachable elastic damping devices and damping anti-vibration counterweights, the weight and center of gravity of each part of the wellbore structure can be adaptively adjusted according to the actual anti-vibration requirements, thereby changing the natural frequency of the wellbore structure, so that the present invention can adapt to different application scenarios and has strong customization; at the same time, a structure with a high damping effect is formed on the outside and bottom of the wellbore structure, which can significantly absorb and reduce vibration waves, so that the present invention can have good anti-vibration capabilities.

[0008] As an improvement to the above solution, the wellbore standard section is composed of multiple wellbore standard plates connected in a removable ring shape, each of which is equipped with an elastic damping device. By further decomposing the wellbore standard sections that make up the wellbore structure and assembling them from standardized wellbore standard plates, the wellbore standard section is further reduced in production difficulty and improved in on-site construction convenience and efficiency. By equipping each wellbore standard component with a separate elastic damping device, the mass and center of gravity of each wellbore standard plate can be individually adjusted.

[0009] As an improvement to the above scheme, the elastic damping device includes a damping counterweight and a first spring lasso, wherein the damping counterweight is suspended on the outside of the wellbore standard section via a plurality of first spring lassoes. The elastic damping device is formed by the first spring lassoes and the damping counterweight, and the first spring lassoes are used to keep the damping counterweight in a suspended state, forming a damping structure on the outside of the wellbore structure. When the wellbore structure is subjected to a vibration force, the damping counterweight is pulled by the elastic force of the first spring lassoes to damp vibration. The damping counterweight continuously consumes energy by doing work to overcome the external vibration force, continuously offsetting and weakening the vibration force, thereby achieving a good vibration reduction effect. The mass and center of gravity can be changed by replacing damping counterweights of different masses or replacing first spring lassoes of different lengths, thereby adjusting the natural frequency according to actual vibration resistance requirements to avoid resonance and prevent structural damage caused by resonance.

[0010] As an improvement to the above solution, it further comprises a counterweight protection shell, wherein an inner cavity for accommodating the damping counterweight block is provided in the counterweight protection shell.

[0011] As an improvement to the above solution, connecting blocks are fixed to both sides of the standard shaft plates. The connecting blocks of adjacent standard shaft plates are connected and fixed via multiple fasteners. The first spring noose is connected to the connecting blocks. The use of connecting blocks and fasteners such as bolts and screws to assemble and connect adjacent standard shaft plates further simplifies assembly and reduces construction difficulty.

[0012] As an improvement to the above scheme, the damping anti-vibration counterweight component is composed of a damping counterweight ball and multiple second spring lassoes with different elastic forces, one end of the second spring lasso is fixed to the damping counterweight ball, and the other end is detachably connected to different positions on the bottom edge of the wellbore standard section at the bottom. The damping anti-vibration counterweight component is composed of the second spring lasso and the damping counterweight ball. The second spring lasso is used to keep the damping counterweight ball in a suspended state, forming a damping structure at the bottom of the wellbore structure. When the wellbore structure is subjected to vibration force, the damping counterweight ball undergoes irregular damping vibration under the elastic traction of the second spring lasso. It continuously consumes energy by overcoming the external vibration force and continuously offsets and weakens the vibration force, thereby achieving a good vibration reduction effect. In addition, the mass and center can be changed by replacing the damping counterweight ball with different masses or replacing the second spring lassoes with different lengths, thereby adjusting the natural frequency according to the actual anti-vibration requirements to avoid resonance and prevent structural damage caused by resonance.

[0013] As an improvement to the above solution, the wellbore standard sections, as well as the second spring noose and the wellbore standard section, are detachably connected via multiple fasteners; these fasteners consist of a female connector with an embedded slot and a male connector with a spring expansion joint, which are snap-fitted together. By using standardized fasteners for detachable connection between the various components of the present invention, all parts are connected using uniformly standardized fasteners, further reducing the number of standard components in the present invention, effectively reducing the difficulty of connecting and assembling the various components, and improving construction efficiency.

[0014] As an improvement to the above solution, the multiple connecting fasteners are arranged equidistantly along the upper and lower edges of the wellbore standard section, so that the upper and lower adjacent wellbore standard sections can be rotated and staggered for connection and assembly, further accurately and conveniently adjusting the overall mass and center of gravity of the wellbore structure.

[0015] The beneficial effects of the present invention are as follows: the present invention combines the anti-vibration structure and the lining structure that constitutes the wellbore structure. On the one hand, the various components that constitute the wellbore structure are standardized and can be prefabricated in the factory. During on-site construction, only simple assembly is needed to complete the construction and installation of the overall structure, which effectively reduces the construction difficulty and improves the construction efficiency; on the other hand, the weight and center of gravity of the various components that constitute the wellbore structure can be adaptively adjusted according to actual anti-vibration requirements, thereby changing the natural frequency of the wellbore structure, and avoiding resonance between the wellbore structure and the vibration source when the wellbore structure is disturbed by vibration; at the same time, a structure with a high damping effect can be formed on the outside and bottom of the wellbore structure, which can significantly absorb and reduce the vibration waves, so that the present invention can have good anti-vibration ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 This is a structural diagram of a standard section of a wellbore;

[0018] Figure 3 This is a schematic diagram of the structure of the standard wellbore plate;

[0019] Figure 4 A schematic diagram of the structure of the connecting fasteners.

[0020] Marked in the figure: 100-wellbore standard section, 110-wellbore standard plate, 120-connecting block, 200-elastic damping device, 210-damping counterweight block, 220-first spring lasso, 230-counterweight protection shell, 300-damping anti-vibration counterweight, 310-damping counterweight ball, 320-second spring lasso, 400-connecting fastener, 410-female head, 420-male head. DETAILED DESCRIPTION

[0021] To facilitate understanding of the present invention, the present invention is further described below with reference to the accompanying drawings.

[0022] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", and "inside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description. They do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0023] like Figure 1 and Figure 2 As shown, the prefabricated anti-vibration wellbore structure disclosed in the present invention is composed of two or more wellbore standard sections 100 assembled vertically, and the wellbore standard section 100 is composed of a plurality of wellbore standard plates 110 assembled together. An elastic damping device 200 is provided on each wellbore standard section 100, and a damping anti-vibration counterweight 300 is provided at the bottom of the wellbore standard section 100 at the bottom of the wellbore structure. The wellbore standard plates 110 that can be prepared in advance as standard parts are assembled to form the wellbore standard section 100, and then the wellbore standard sections 100 are vertically assembled to form the wellbore structure, which can effectively improve construction efficiency and reduce construction difficulty. The lining structure is formed by assembling standard parts, which is convenient for transportation and installation, and can also be disassembled and recycled. The size and assembly quantity of the wellbore standard parts 110 can be designed according to the construction location, so that the size of the wellbore standard section 100 can be adjusted according to construction requirements. The addition of the elastic damping device 200 and the damping anti-vibration counterweight 300 can form an anti-vibration structure with a high damping effect on the outside and bottom of the wellbore structure, thereby absorbing and reducing the vibration energy caused by adverse external vibration interference, and achieving a good anti-vibration effect through the overall synergy of multiple anti-vibration structures. In addition, the present invention combines the anti-vibration structure with the lining structure that constitutes the wellbore structure, achieving the effect of using one material for multiple purposes, without making the wellbore structure too complicated. The elastic damping device 200 and the damping anti-vibration counterweight 300 are both installed in a detachable manner. When necessary, the mass and center of gravity can be adjusted according to the actual anti-vibration requirements. By changing the resonant frequency of the wellbore structure to achieve a good anti-vibration effect, their scope of application is effectively expanded.

[0024] Specifically, the wellbore standard component 110 used in the present invention to form the wellbore standard section 100 is as follows: Figures 1 to 3As shown, the wellbore standard component 110 is an arc-shaped plate structure. Multiple wellbore standard components 110 are assembled in a circular pattern to form a cylindrical wellbore standard section 100. Each wellbore standard section 100 is equipped with an elastic damping device 200. The wellbore standard components 110 are detachably connected by connecting blocks 120. The connecting blocks 120 extend along both sides of the wellbore standard components 110. The connecting blocks 120 are provided with multiple connection holes that cooperate with fasteners. Fasteners such as bolts or screws are sequentially passed through the corresponding connection holes on the connecting blocks 120 of two adjacent wellbore standard components 110 and tightened to achieve the connection and fixation between the wellbore standard components 110.

[0025] like Figures 1 to 3 As shown, the main body of the elastic damping device 200 is composed of a damping counterweight 210 and a first spring lasso 220. Multiple first spring lassoes 220 are simultaneously connected to the damping counterweight 210 and the corresponding wellbore standard component 110, so that the damping counterweight 210 is suspended outside the wellbore standard component 110. A counterweight protection shell 230 is provided outside the damping counterweight 210. The interior of the counterweight protection shell 230 is an inner cavity for accommodating the damping counterweight 210. The first spring lassoes 220 connected to the damping counterweight 210 pass through the counterweight protection shell 230 and then connect to the connecting blocks 120 on both sides of the wellbore standard component 110. The first spring lasso 220 and the wellbore standard component 110 can be detachably connected by fasteners, so that the first spring lasso 220 can be replaced. By connecting multiple first spring lassos 220 of different lengths to the elastic damping device 200, the position of the damping counterweight 210 can be adjusted. In addition, the damping counterweight 210 of different masses or shapes can be replaced, thereby changing the mass and center of gravity of each wellbore standard component 110.

[0026] like Figure 1 As shown, the damping and anti-vibration counterweight 300 comprises a damping counterweight ball 310, which is connected to the bottom of the wellbore standard section 100 at the bottom of the wellbore structure via multiple second spring lassoes 320. One end of the second spring lasso 320 is fixed to the damping counterweight ball 310, while the other end is detachably connected to different locations on the bottom edge of the wellbore standard section 100. When the wellbore structure is disturbed by external vibrations, the damping counterweight ball 310, pulled by the second spring lassoes 320, dampens vibrations. The multiple second spring lassoes 320 connected to the damping counterweight ball 310 can be configured with different elastic forces, causing the damping counterweight ball 310 to oscillate irregularly due to the pull of the different elastic forces.

[0027] In the present invention, the detachable connection between each wellbore standard section 100 and the detachable connection between the second spring lasso 320 and the wellbore standard section 100 are both realized by a snap connection that is easy to disassemble. Specifically, Figure 4 As shown, this is achieved through a connecting fastener 400 consisting of a female connector 410 and a male connector 420. The female connector 410 has an internal slot, while the male connector 420 has a spring-loaded extension. The spring-loaded extension on the male connector 420 inserts into the internal slot of the female connector 410, forming a snap-fit ​​fit. The installation method and position of the female and male connectors 410 and 420 are not limited, but the optimal arrangement of the connecting fasteners 400 is to arrange them equidistantly along the upper and lower edges of the wellbore standard section 100. Adjacent wellbore standard sections 100 can be connected by rotating to stagger them.

[0028] The present invention can be implemented in the following two ways during on-site engineering construction:

[0029] The first method uses customized wellbore standard sections 100 to assemble the wellbore structure. It is necessary to pre-calculate the thickness of the wellbore structure and analyze and estimate the vibration frequency before determining the thickness and size of the wellbore standard section 100, and preliminarily design the size and mass of the elastic damping device 200 and the damping counterweight 300; then perform 1:1 three-dimensional modeling and three-dimensional finite element vibration resistance calculation and analysis, adjust the size, mass and layout position of the elastic damping device 200 and the damping counterweight 300 according to the calculation results, and determine the size and assembly position of the wellbore standard section 100 according to the calculation results, so as to adjust the resonant frequency of the overall wellbore structure and achieve the best vibration resistance effect.

[0030] The second method uses standard wellbore sections 100 of uniform size to assemble the wellbore structure. Since the size of the standard wellbore sections 100 is uniform, it is easier to manufacture, process and assemble the standard wellbore plates 110. The difference between the second method and the first method is that after performing three-dimensional finite element anti-vibration calculation analysis, only the mass and layout position of the elastic damping device 200 and the damping counterweight 300 are adjusted to adjust the resonant frequency of the wellbore structure and achieve the best anti-vibration effect.

[0031] Both of the above-mentioned implementations achieve excellent vibration isolation by adjusting the overall wellbore structure's resonant frequency. The difference lies in the trade-off between production convenience and control accuracy of the vibration isolation effect, which can be selected based on actual vibration isolation requirements. Both implementations achieve vibration isolation and the coordinated vibration reduction effect of multiple damping effects.

Claims

1. The assembled anti-vibration wellbore structure is characterized by: The wellbore structure comprises at least two wellbore standard sections (100) detachably connected in a vertical direction, at least one detachable elastic damping device (200) being suspended from each wellbore standard section (100), and a detachable damping and anti-vibration counterweight (300) being suspended from the bottom of the wellbore standard section (100) at the bottom end; The wellbore standard section (100) is composed of a plurality of wellbore standard plates (110) connected in a detachable ring shape, and each wellbore standard plate (110) is provided with an elastic damping device (200); the elastic damping device (200) comprises a damping counterweight block (210) and a first spring lasso (220), and the damping counterweight block (210) is suspended on the outside of the wellbore standard section (100) through a plurality of first spring lassos (220); Connecting blocks (120) are fixed to both side edges of the wellbore standard plate (110), and the connecting blocks (120) of adjacent wellbore standard plates (110) are connected and fixed via a plurality of fasteners; the first spring lasso (220) is connected to the connecting blocks (120); The damping anti-vibration counterweight (300) is composed of a damping counterweight ball (310) and a plurality of second spring lassoes (320) with different elastic forces, one end of the second spring lasso (320) is fixed to the damping counterweight ball (310), and the other end is detachably connected to different positions on the bottom edge of the wellbore standard section (100) at the bottom end; The wellbore standard sections (100) and the second spring lasso (320) and the wellbore standard section (100) are all detachably connected via a plurality of connecting fasteners (400); the connecting fasteners (400) are composed of a female head (410) provided with an embedded groove and a male head (420) provided with a spring expansion head, which are connected by snap-fitting.

2. The assembled anti-vibration wellbore structure according to claim 1, characterized in that: It also includes a counterweight protection shell (230), wherein an inner cavity for accommodating the damping counterweight block (210) is provided in the counterweight protection shell (230).

3. The assembled anti-vibration wellbore structure according to claim 1, characterized in that: The plurality of connecting fasteners (400) are arranged at equal distances along the upper and lower edges of the wellbore standard section (100).

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