Damping ring for geothermal well damping

Abstract

The utility model relates to the technical field of geothermal wells, in particular to a damping ring for damping of a geothermal well, which comprises a circular annular shell, a plurality of damping mechanisms are arranged in the annular shell, and the damping mechanisms are uniformly distributed in the annular shell and are symmetrically arranged in pairs along the radial direction of the annular shell; the damping mechanism comprises a plurality of longitudinal damping assemblies which are longitudinally arranged and a plurality of transverse damping assemblies which are horizontally arranged, the longitudinal damping assemblies are used for conducting damping and energy dissipation on vibration generated by P waves in seismic waves, and the transverse damping assemblies are used for conducting damping and energy dissipation on vibration generated by S waves in the seismic waves. Vibration caused by P waves and S waves in an earthquake can be subjected to vibration reduction and energy dissipation treatment, and the anti-seismic performance of the geothermal well is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to geothermal well technical field relates to geothermal well damping, specifically relates to a kind of damping ring for geothermal well damping. BACKGROUND

[0002] Geothermal energy is a clean and sustainable energy. Its use is varied, low-temperature geothermal resources for winter heating, and high-temperature geothermal resources can be used for power generation. Accelerate the development and utilization of geothermal energy for energy structure adjustment, energy saving and emission reduction is of great significance.

[0003] With the continuous development of the national western development strategy, and the continuous development of construction engineering technology, the requirement for improving the seismic capacity of structural buildings is also increasing. Geothermal well is an important facility for the development and utilization of geothermal energy, and its structure usually includes surface casing, technical casing, production casing and other parts. The surface casing is the outermost casing of the geothermal well, which mainly plays the role of protecting the well wall and isolating surface water; the technical casing is located inside the surface casing, which is used to support and fix the equipment in the well, and prevent underground water and strata from entering the well; the production casing is located inside the technical casing, which is the main channel for geothermal fluid production.

[0004] Geothermal well is usually located in areas with complex geological structure and frequent seismic activity, so its seismic design is crucial. The core of geothermal well seismic design is to improve the seismic performance of the wellbore to ensure the structural integrity and normal function of the geothermal well during natural disasters such as earthquakes. Traditional geothermal well seismic design mainly relies on thickening the well wall, using high-strength materials and other traditional reinforcement techniques, but these methods have many limitations and cannot meet the increasingly high seismic requirements. At the same time, traditional seismic design is mostly based on experience and analogy, lacking systematic research on the special environmental conditions of geothermal wells, resulting in unsatisfactory seismic effect. SUMMARY

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a damping ring for geothermal well damping. The utility model can reduce the vibration caused by P wave and S wave in earthquake and effectively improve the seismic performance of geothermal well.

[0006] The technical solution of the utility model is as follows:

[0007] A damping ring for geothermal well damping, comprising a circular ring-shaped shell, a plurality of damping mechanisms are arranged in the ring-shaped shell, and all the damping mechanisms are uniformly distributed in the ring-shaped shell and arranged symmetrically along the radial direction of the ring-shaped shell.

[0008] The damping mechanism comprises a plurality of longitudinally arranged longitudinal damping components and horizontally arranged transverse damping components, the longitudinal damping components are used for damping and energy dissipation of vibration caused by P waves in seismic waves, and the transverse damping components are used for damping and energy dissipation of vibration caused by S waves in seismic waves.

[0009] Further, the longitudinal damping component comprises a vertical pipe arranged vertically and a first damping spring, the vertical pipe is connected with the upper and lower inner walls of the annular shell at both ends, the first damping spring is arranged in the vertical pipe, and a first rubber block is horizontally arranged at both ends of the first damping spring respectively, and the first rubber block is connected with the first damping spring.

[0010] Further, a first damping gasket and a first pad are horizontally arranged in the corresponding vertical pipe outside the first rubber block, and the first damping gasket is located between the first rubber block and the first pad.

[0011] Further, the transverse damping component comprises a horizontal pipe arranged horizontally and a second damping spring, the horizontal pipe is connected with the inner ring and the outer ring of the annular shell at both ends, the second damping spring is arranged in the horizontal pipe, and a second rubber block is arranged at both ends of the second damping spring respectively, and the second rubber block is connected with the second damping spring.

[0012] Further, a second damping gasket and a second pad are arranged in the corresponding horizontal pipe outside the second rubber block, and the second damping gasket is located between the second rubber block and the second pad.

[0013] Further, the transverse damping component is a viscous damper, and a connecting pin seat corresponding to a connecting pin head of the viscous damper is arranged on the inner ring and the outer ring of the annular shell at both ends of the viscous damper respectively, the connecting pin head of the viscous damper is connected with the connecting pin seat through a connecting pin shaft, so that the viscous damper is arranged in the annular shell.

[0014] Compared with the prior art, the damping mechanism has the following beneficial effects:

[0015] 1. The longitudinal damping component and the transverse damping component are arranged in the annular shell, the longitudinal damping component can damp and energy dissipate vibration caused by P waves in seismic waves, the transverse damping component can damp and energy dissipate vibration caused by S waves in seismic waves, so that the vibration caused by P waves and S waves in the earthquake can be effectively damped and energy dissipated, and the anti-seismic performance of the geothermal well is effectively improved.

[0016] 2. The damping component of the utility model, rubber blocks are arranged at both ends of the damping spring, the rubber blocks have good elasticity and damping performance, can effectively absorb and disperse vibration energy generated by seismic waves, and can further enhance the damping effect in cooperation with the damping spring.

[0017] Further, the shock-absorbing pads and blocks are arranged outside the rubber blocks, which can reduce the direct wear of the shock-absorbing springs when impacted, prolonging the service life of the shock-absorbing springs. Meanwhile, the combination of the rubber blocks, the shock-absorbing pads and the blocks can form a more stable shock-absorbing system, improving the overall stability of the geothermal well under the action of earthquakes. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 - Structure diagram of the annular shell.

[0019] Figure 2 - Diagram of the shock-absorbing mechanism distributed in the annular shell.

[0020] Figure 3 - Structure diagram of the longitudinal shock-absorbing assembly.

[0021] Figure 4 - Structure diagram of the transverse shock-absorbing assembly.

[0022] Wherein: 100 - annular shell; 200 - longitudinal shock-absorbing assembly; 201 - vertical pipe; 202 - shock-absorbing spring; 203 - rubber block; 204 - shock-absorbing pad; 205 - block; 300 - transverse shock-absorbing assembly; 301 - viscous damper; 302 - connecting pin shaft; 303 - connecting pin seat. DETAILED DESCRIPTION

[0023] The utility model will be explained in further detail below in combination with the drawings and specific embodiments.

[0024] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a shock-absorbing ring for geothermal well shock absorption, characterized by comprising a circular annular shell 100, a plurality of shock-absorbing mechanisms are arranged in the annular shell 100, and all the shock-absorbing mechanisms are uniformly distributed in the annular shell 100 and arranged in pairs along the radial direction of the annular shell.

[0025] The shock-absorbing mechanism comprises a plurality of longitudinally arranged longitudinal shock-absorbing assemblies 200 and horizontally arranged transverse shock-absorbing assemblies 300, the longitudinal shock-absorbing assemblies 200 are used for damping and energy dissipation of the vibration caused by P waves in seismic waves, and the transverse shock-absorbing assemblies 300 are used for damping and energy dissipation of the vibration caused by S waves in seismic waves.

[0026] Here, the annular shell is composed of an inner ring plate, an outer ring plate, and a top plate and a bottom plate arranged at the top and bottom of the inner ring plate and the outer ring plate, the inner ring plate and the outer ring plate are arranged concentrically, the top plate closes the top between the inner ring plate and the outer ring plate, and the bottom plate closes the bottom between the inner ring plate and the outer ring plate. The longitudinal shock-absorbing assemblies are vertically arranged in the annular shell, and the transverse shock-absorbing assemblies are horizontally arranged in the annular shell.

[0027] When the shock-absorbing ring is used for shock absorption of a geothermal well, the shock-absorbing ring can be arranged between the surface casing and the technical casing (sleeved on the technical casing), or arranged between the technical casing and the production casing (sleeved on the production casing), or arranged between the surface casing and the technical casing and between the technical casing and the production casing. The longitudinal shock-absorbing assembly can absorb and dissipate the vibration caused by P waves in the seismic wave, and the transverse shock-absorbing assembly can absorb and dissipate the vibration caused by S waves in the seismic wave, so that the vibration caused by P waves and S waves in the earthquake can be effectively absorbed and dissipated, and the anti-seismic performance of the geothermal well is effectively improved.

[0028] In specific implementation, the longitudinal shock-absorbing assembly includes vertical pipes 201 and 202 and shock-absorbing springs, the vertical pipes 201 are connected to the upper and lower inner walls of the annular shell 100 at both ends, the shock-absorbing springs 202 are arranged in the vertical pipes 201, and rubber blocks 203 are horizontally arranged at both ends of the shock-absorbing springs 202, and the rubber blocks 203 are connected to the shock-absorbing springs 202.

[0029] In this way, the rubber blocks have good elasticity and damping performance, can effectively absorb and disperse the vibration energy caused by the seismic wave, and can further enhance the shock-absorbing effect in cooperation with the shock-absorbing springs.

[0030] In specific implementation, the shock-absorbing gaskets 204 and the gasket blocks 205 are horizontally arranged in the vertical pipes 201 corresponding to the outer side of the rubber blocks 203, and the shock-absorbing gaskets 204 are located between the rubber blocks 203 and the gasket blocks 205.

[0031] Here, the shock-absorbing gaskets and the gasket blocks are arranged outside the rubber blocks, which can reduce the direct wear of the shock-absorbing springs when the shock-absorbing springs are impacted, and prolong the service life of the shock-absorbing springs. Meanwhile, the combination of the rubber blocks, the shock-absorbing gaskets and the gasket blocks can form a more stable shock-absorbing system, and improve the overall stability of the geothermal well under the action of the earthquake.

[0032] In specific implementation, the transverse shock-absorbing assembly can also adopt the longitudinal shock-absorbing assembly, but the longitudinal shock-absorbing assembly is horizontally arranged in use. Meanwhile, because the intensity of S waves in the seismic wave is generally higher than that of P waves, the transverse shock-absorbing assembly 300 is a viscous damper 301, and connecting pin seats 303 corresponding to connecting pin heads of the viscous damper 301 are arranged on the inner and outer ring plates of the annular shell corresponding to both ends of the viscous damper 301, the connecting pin heads of the viscous damper 301 are connected to the connecting pin seats 303 through connecting pin shafts 302, and the viscous damper 300 is arranged in the annular shell 100.

[0033] In specific implementation, the transverse shock-absorbing assembly and the longitudinal shock-absorbing assembly can be integrally arranged in a closed shell, and then the shell is arranged in the annular shell. For example,Figure 2 As shown, four damping mechanisms are arranged in the embodiment, and in specific applications, six damping mechanisms, eight damping mechanisms, ten damping mechanisms, or the like can be arranged according to actual needs.

[0034] Finally, it should be noted that the above embodiments of the utility model are only examples for illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes and variations can be made on the basis of the above description. It is impossible to enumerate all the embodiments here. Any obvious changes or variations derived from the technical solutions of the utility model still fall within the protection scope of the utility model.

Claims

1. A shock absorbing ring for geothermal wells, characterized by, The application relates to a circular ring-shaped shell, wherein a plurality of damping mechanisms are arranged in the ring-shaped shell, all the damping mechanisms are uniformly distributed in the ring-shaped shell and are arranged in pairs along the radial direction of the ring-shaped shell. The damping mechanism comprises a plurality of longitudinally arranged longitudinal damping components and horizontally arranged transverse damping components, the longitudinal damping components are used for damping and energy dissipation of vibration caused by P waves in seismic waves, and the transverse damping components are used for damping and energy dissipation of vibration caused by S waves in seismic waves. The longitudinal damping component comprises a vertical pipe arranged vertically and a first damping spring, the vertical pipe is connected to the upper and lower inner walls of the ring-shaped shell at two ends, the first damping spring is arranged in the vertical pipe, and a first rubber block is horizontally arranged at two ends of the first damping spring respectively, and the first rubber block is connected with the first damping spring. The transverse damping component comprises a horizontal pipe arranged horizontally and a second damping spring, the horizontal pipe is connected to the inner ring and the outer ring of the ring-shaped shell at two ends, the second damping spring is arranged in the horizontal pipe, and a second rubber block is arranged at two ends of the second damping spring respectively, and the second rubber block is connected with the second damping spring. Alternatively The transverse damping component is a viscous damper, a connecting pin seat corresponding to a connecting pin head of the viscous damper is arranged on the inner ring and the outer ring of the ring-shaped shell at two ends of the viscous damper respectively, the connecting pin head of the viscous damper is connected with the connecting pin seat through a connecting pin shaft, so that the viscous damper is arranged in the ring-shaped shell.

2. The shock ring for geothermal well according to claim 1, characterized in that, A first damping gasket and a first pad are horizontally arranged in the vertical pipe corresponding to the outside of the first rubber block, and the first damping gasket is located between the first rubber block and the first pad.

3. The shock ring for geothermal well according to claim 1, characterized in that, A second damping gasket and a second pad are arranged in the horizontal pipe corresponding to the outside of the second rubber block, and the second damping gasket is located between the second rubber block and the second pad.

Images