Power generation device and method based on tubing string vibration

Abstract

The present application relates to the technical field of petroleum exploitation. Disclosed are a power generation device and method based on tubing string vibration. In order to ensure the triboelectric power generation of nanomaterials without increasing the vibration frequency and amplitude of an oil tube, the power generation device based on tubing string vibration comprises an inner cylinder (11) and an outer cylinder (12) which are sleeved one on the other, and dielectric particles (5); and a first nanomaterial layer (41) is provided on the outer peripheral surface of the inner cylinder (11), a second nanomaterial layer (42) is provided on the inner peripheral surface of the outer cylinder (12), the outer peripheral surface of the first nanomaterial layer (41) and / or the inner peripheral surface of the second nanomaterial layer (42) are / is each provided with a recess (43), and the dielectric particles are arranged in the recesses to vibrate between the first nanomaterial layer and the second nanomaterial layer. The power generation device can not only intensify the contact-separation power generation between the dielectric particles and the first nanomaterial layer or the second nanomaterial layer, but also avoid intensifying the vibration of a mounting structure connected to the oil tube.

Description

A power generation device and method based on column vibration

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202510121952.7, filed on January 24, 2025, and incorporates the entire contents of the aforementioned patent application as part of this application. Technical Field

[0003] This application relates to the field of oil extraction technology, specifically a power generation device and method based on tubing vibration. Background Technology

[0004] In oil extraction, various sensors, such as those for temperature and pressure, need to be installed downhole to more accurately monitor downhole environmental parameters for production process control, and energy storage batteries are used to power these sensors. However, battery energy storage is limited, and batteries typically need to be replaced every two to three years. Replacement requires removing the entire tubing from the well. The tubing replacement process is complex, requires collaboration among multiple trades, and is time-consuming and labor-intensive.

[0005] To reduce the frequency of tubing replacements due to battery depletion, existing technologies have considered supplementing battery energy storage with downhole generators, such as triboelectric nanogenerators. Currently, there are two main approaches. One involves placing nanomaterials on the inner wall of the tubing channel, using fluid to induce friction and generate electricity. However, the complex composition of fluids, including liquids, gases, and solid particles, makes the nanomaterials easily eroded and damaged, hindering long-term use. The other approach involves creating a sandwich space within the tubing, with nanomaterials attached to both the inner and outer sides. When the tubing vibrates, the nanomaterials on both sides come into contact and separate, generating electricity through friction. However, in actual production, it's crucial to minimize the tubing's vibration frequency and amplitude; otherwise, it may cause structural damage and damage to connected equipment such as pump rods and cables. Furthermore, the more stable the tubing, the lower the likelihood of contact separation between the two nanomaterials, making it difficult to guarantee power generation. Summary of the Invention

[0006] In order to ensure the triboelectric power generation of nanomaterials without increasing the vibration frequency and amplitude of the oil pipe, this application provides a power generation device and method based on pipe column vibration. The power generation device based on pipe column vibration can both intensify the contact and separation of the medium particles with the first nanomaterial layer or the second nanomaterial layer to generate electricity, and avoid intensifying the vibration of the installation structure connected to the oil pipe.

[0007] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0008] This application provides a power generation device based on column vibration, including an inner cylinder and an outer cylinder with inner and outer sleeves, forming an annular space between the inner and outer cylinders, and dielectric particles disposed in the annular space; a first nanomaterial layer is disposed on the outer peripheral surface of the inner cylinder, and a second nanomaterial layer is disposed on the inner peripheral surface of the outer cylinder; both the outer peripheral surface of the first nanomaterial layer and / or the inner peripheral surface of the second nanomaterial layer are provided with recesses, and the dielectric particles are located in the recesses, and the dielectric particles can contact or separate from the first nanomaterial layer, and the dielectric particles can also contact or separate from the second nanomaterial layer.

[0009] This application also provides a power generation device based on column vibration, comprising an inner cylinder, an outer cylinder sleeved outside the inner cylinder, a first nanomaterial layer, a second nanomaterial layer, and dielectric particles. An annular space is formed between the inner and outer cylinders. The first nanomaterial layer is disposed on the outer circumferential surface of the inner cylinder, and the second nanomaterial layer is disposed on the inner circumferential surface of the outer cylinder. Recesses are provided on the outer circumferential surface of the first nanomaterial layer and / or the inner circumferential surface of the second nanomaterial layer. The dielectric particles are disposed within the annular space and located within the recesses. The radial width of the annular space at the recesses is greater than the particle size of the dielectric particles, allowing the dielectric particles to bounce and impact the first and second nanomaterial layers within the recesses.

[0010] This application embodiment also provides a power generation method based on column vibration. The power generation method based on column vibration adopts the above-mentioned power generation device based on column vibration. The power generation method based on column vibration includes the following steps: the dielectric particles contact or separate from the first nanomaterial layer, and the dielectric particles also contact or separate from the second nanomaterial layer.

[0011] The beneficial effects of the embodiments of this application are:

[0012] By setting a first nanomaterial layer on the outer wall of the inner cylinder and a second nanomaterial layer on the inner wall of the outer cylinder, and setting multiple recesses on the surface of the first nanomaterial layer and / or the second nanomaterial layer, and accommodating medium particles in the recesses, when the fluid flows through the inner cylinder and generates slight vibrations, the first nanomaterial layer and the second nanomaterial layer vibrate and separate, and at the same time, the medium particles vibrate. When the medium particles jump, they repeatedly hit the first nanomaterial layer and the second nanomaterial layer, which intensifies the vibration of the first nanomaterial layer and the second nanomaterial layer, thereby increasing the contact points and the frequency of contact separation, and thus increasing the power generation.

[0013] In addition, when the dielectric particles move repeatedly between the first and second nanomaterial layers, they also play a role in transferring charge, thereby further increasing the power generation.

[0014] Furthermore, when multiple dielectric particles are subjected to vibration, due to factors such as slight differences in mass and surface flatness between the particles, the multiple dielectric particles as a whole exhibit disordered vibration. The impact force generated by the dielectric particles mainly increases the vibration of the nanomaterial layer near the concave part, without causing the vibration of the entire inner cylinder or the entire outer cylinder to intensify. This achieves both the ability to intensify the contact separation and power generation of the first and second nanomaterial layers inside, and the avoidance of intensified vibration of the installation structure connected by the oil pipe. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0016] Figure 1 is a front view schematic diagram of the power generation device based on tubing vibration described in this application installed downhole.

[0017] Figure 2 is a top view of the power generation device based on column vibration described in this application.

[0018] Figure 3 is a cross-sectional view after being cut along the AA direction in Figure 2 and rotated 90°.

[0019] Figure 4 is an enlarged schematic diagram of part B in Figure 3.

[0020] Figure 5 is a schematic diagram of the concave part on the inner cylinder.

[0021] Figure 6 is a schematic diagram of the concave part on the outer cylinder.

[0022] Figure 7 is a schematic diagram when the concave part is a separate structure.

[0023] Figure 8 is a schematic diagram of the medium particles.

[0024] Figure 9 is a schematic diagram of the circuit connection based on column vibration as described in this application.

[0025] The reference numerals in the attached drawings are explained as follows: 11. Inner cylinder; 12. Outer cylinder; 121. Battery mounting slot; 2. Annular space; 31. First insulating layer; 32. Second insulating layer; 41. First nanomaterial layer; 42. Second nanomaterial layer; 43. Recess; 44. Bottom wall; 45. Arc-shaped surface; 46. Bottom surface; 411. First inner surface; 412. First outer surface; 421. Second outer surface; 422. Second inner surface; 5. Dielectric particle; 51. Protrusion; 61. First electrode; 62. Second electrode; 63. Rechargeable battery; 64. Voltage regulator and rectifier module; 65. Power management module; 66. Power output port; 7. Oil pipe; 8. Power generation device based on pipe column vibration. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] For ease of understanding and description, absolute positional relationships are used in the following description of this application. Unless otherwise specified, the directional term "up" refers to the upper direction in Figure 1, "down" refers to the lower direction in Figure 1, "left" refers to the left direction in Figure 1, "right" refers to the right direction in Figure 1, "front" refers to the direction perpendicular to the paper in Figure 1 and pointing inwards from the paper, and "back" refers to the direction perpendicular to the paper in Figure 1 and pointing outwards from the paper. This application is described from the perspective of the reader or user, but the above directional terms should not be understood or interpreted as limiting the scope of protection of this application. Regarding the dimensions and angles of the components, those skilled in the art can determine them specifically according to actual needs or a limited number of experiments.

[0028] As shown in Figures 2 to 4, the power generation device based on column vibration according to the embodiments of this application includes an inner cylinder 11 and an outer cylinder 12 with inner and outer sleeves. An annular space 2 is formed between the inner cylinder 11 and the outer cylinder 12, and a medium particle 5 is disposed in the annular space 2. A first nanomaterial layer 41 is disposed on the outer peripheral surface of the inner cylinder 11, and a second nanomaterial layer 42 is disposed on the inner peripheral surface of the outer cylinder 12. There is a gap between the first nanomaterial layer 41 and the second nanomaterial layer 42. A recess 43 is provided on the outer peripheral surface of the first nanomaterial layer 41 and / or the inner peripheral surface of the second nanomaterial layer 42. The medium particle 5 is located in the recess 43. The medium particle 5 can contact or separate from the first nanomaterial layer 41, and the medium particle 5 can also contact or separate from the second nanomaterial layer 42.

[0029] Multiple recesses 43 are provided on the outer peripheral surface of the first nanomaterial layer 41 and / or the inner peripheral surface of the second nanomaterial layer 42. Medium particles 5 are accommodated in these recesses 43. When fluid flows through the inner cylinder 11 and generates minute vibrations, it causes the first nanomaterial layer 41 and the second nanomaterial layer 42 to vibrate, resulting in contact or separation. Simultaneously, the medium particles 5 vibrate. As the medium particles 5 bounce, they repeatedly impact the first nanomaterial layer 41 and the second nanomaterial layer 42, intensifying their vibrations and increasing the number of contact points and the frequency of contact separation, thus increasing power generation. Furthermore, the repeated movement of the medium particles 5 between the first nanomaterial layer 41 and the second nanomaterial layer 42 also plays a role in transferring charge, further increasing power generation.

[0030] Furthermore, when multiple dielectric particles 5 are subjected to vibration, due to factors such as slight differences in mass and surface flatness between the particles, the multiple dielectric particles 5 as a whole exhibit disordered vibration. The impact force generated by the dielectric particles 5 mainly increases the vibration of the nanomaterial layer near the concave part 43, without causing the vibration of the entire inner cylinder 11 or the entire outer cylinder 12 to intensify. This achieves both the ability to intensify the contact separation and power generation of the first nanomaterial layer 41 and the second nanomaterial layer 42 inside, and the avoidance of intensified vibration of the installation structure (inner cylinder 11 and outer cylinder 12) connected by the oil pipe 7.

[0031] The phrase "the surface of the first nanomaterial layer 41 and / or the second nanomaterial layer 42 is provided with a plurality of recesses 43" means that a plurality of recesses 43 can be provided on the surface of the first nanomaterial layer 41, a plurality of recesses 43 can be provided on the surface of the second nanomaterial layer 42, or a plurality of recesses 43 can be provided on the surfaces of both the first nanomaterial layer 41 and the second nanomaterial layer 42.

[0032] In this embodiment, as shown in Figures 2 to 4, the axis of the inner cylinder 11 coincides with the axis of the outer cylinder 12. The outer circumferential surface of the inner cylinder 11 is provided with a first nanomaterial layer 41 and the inner circumferential surface of the outer cylinder 12 is provided with a second nanomaterial layer 42. A first insulating layer 31 is provided between the inner cylinder 11 and the first nanomaterial layer 41, and a second insulating layer 32 is provided between the outer cylinder 12 and the second nanomaterial layer 42.

[0033] The inner cylinder 11 and the outer cylinder 12 can be connected and fixed together by connectors, and the two ends of the annular space 2 are closed. Both the inner cylinder 11 and the outer cylinder 12 are made of alloy steel to meet the requirements of downhole pressure bearing capacity and high temperature resistance, such as N80, C90, P110, tubing steel, etc.

[0034] A first insulating layer 31 and a second insulating layer 32 are provided to prevent energy dissipation caused by current contact with the metal installation structure, thus avoiding a decrease in power generation and ineffective power supply. The first insulating layer 31 can be made of at least one of alumina, quartz glass, ceramic, and polytetrafluoroethylene. The first insulating layer 31 is formed by spraying or coating to minimize its space occupation, and its thickness can be 0.5 mm to 1.5 mm. The second insulating layer 32 can also be made of at least one of alumina, quartz glass, ceramic, and polytetrafluoroethylene. The second insulating layer 32 is formed by spraying or coating to minimize its space occupation, and its thickness can be 0.5 mm to 1.5 mm.

[0035] The recesses 43 on the outer periphery of the first nanomaterial layer 41 can be annular structures, with the axis of the annular structure coinciding with the axis of the inner cylinder 11. Multiple recesses 43 are arranged at intervals along the axial direction of the inner cylinder 11. Alternatively, the recesses 43 on the outer periphery of the first nanomaterial layer 41 can also be block structures, with multiple recesses 43 arranged in regular rows.

[0036] The recesses 43 on the inner circumferential surface of the second nanomaterial layer 42 can be annular structures, with the axis of the annular structure coinciding with the axis of the outer cylinder 12. Multiple recesses 43 are arranged at intervals along the axial direction of the outer cylinder 12. Alternatively, the recesses 43 on the inner circumferential surface of the second nanomaterial layer 42 can also be block structures, with multiple recesses 43 arranged in regular rows.

[0037] In this embodiment, as shown in Figures 5 and 6, the outer peripheral surface of the first nanomaterial layer 41 is provided with a plurality of recesses 43, and the plurality of recesses 43 on the outer peripheral surface of the first nanomaterial layer 41 are arranged in a regular row and column. The inner peripheral surface of the second nanomaterial layer 42 is provided with a plurality of recesses 43, and the plurality of recesses 43 on the inner peripheral surface of the second nanomaterial layer 42 are also arranged in a regular row and column.

[0038] The row direction can be the circumferential direction of the inner cylinder 11, and the column direction can be the axial direction of the inner cylinder 11. For example, multiple recesses 43 on the outer peripheral surface of the first nanomaterial layer 41 form multiple first recess rows and multiple first recess columns. A first recess row contains multiple recesses 43 arranged along the circumferential direction of the inner cylinder 11, and a first recess column contains multiple recesses 43 arranged along the axial direction of the inner cylinder 11, as shown in Figures 5 and 6.

[0039] Accordingly, the multiple recesses 43 on the inner circumferential surface of the second nanomaterial layer 42 form multiple second recess rows and multiple second recess columns. A second recess row contains multiple recesses 43 arranged circumferentially along the outer cylinder 12, and a second recess column contains multiple recesses 43 arranged axially along the outer cylinder 12.

[0040] The plurality of recesses 43 on the outer peripheral surface of the first nanomaterial layer 41 and the plurality of recesses 43 on the inner peripheral surface of the second nanomaterial layer 42 can be staggered (i.e., not overlapping one-to-one). Alternatively, the plurality of recesses 43 on the outer peripheral surface of the first nanomaterial layer 41 and the plurality of recesses 43 on the inner peripheral surface of the second nanomaterial layer 42 can also overlap one-to-one.

[0041] Preferably, the plurality of recesses 43 on the outer peripheral surface of the first nanomaterial layer 41 and the plurality of recesses 43 on the inner peripheral surface of the second nanomaterial layer 42 can be staggered. This reduces the distance between the first nanomaterial layer 41 and the second nanomaterial layer 42 at the positions of the recesses 43, i.e., D1 (or D3) below. The recesses 43 correspond radially to the relatively protruding positions, facilitating frictional contact. Furthermore, this allows oscillation between the first nanomaterial layer 41 and the second nanomaterial layer 42 to be achieved even when the vibration amplitude of the medium particles 5 is smaller.

[0042] The thickness of the first nanomaterial layer 41 and the second nanomaterial layer 42 is both 0.5 mm to 3 mm. The first nanomaterial layer 41 and the second nanomaterial layer 42 can be pre-formed and then the first nanomaterial layer 41 is pasted onto the insulating layer 3 on the outer wall of the inner cylinder 11, and the second nanomaterial layer 42 is pasted onto the insulating layer 3 on the inner wall of the outer cylinder 12.

[0043] As shown in Figures 5 and 6, the size and shape of the recess 43 on the outer peripheral surface of the first nanomaterial layer 41 and the recess 43 on the inner peripheral surface of the second nanomaterial layer 42 can be the same. The bottom surface of the recess 43 on the outer peripheral surface of the first nanomaterial layer 41 can be circular, and the top surface of the recess 43 on the outer peripheral surface of the first nanomaterial layer 41 can be circular or a regular polygon. The area of ​​the bottom surface of the recess 43 is smaller than the area of ​​the top surface of the recess 43. The outer peripheral surface of the first nanomaterial layer 41 is provided with a recess 43 and an arc-shaped surface 45 (i.e., a non-recessed portion 43), and the inner peripheral surface of the second nanomaterial layer 42 is provided with a recess 43 and an arc-shaped surface 45 (i.e., a non-recessed portion 43).

[0044] The distance between the bottom surface 46 of the recess 43 on the outer peripheral surface of the first nanomaterial layer 41 and the arcuate surface 45 of the second nanomaterial layer 42 is D1, and the distance between the bottom surface 46 of the recess 43 on the inner peripheral surface of the second nanomaterial layer 42 and the arcuate surface 45 of the first nanomaterial layer 41 is D3. D1 can be equal to D3. The distance between the arcuate surface 45 of the first nanomaterial layer 41 and the arcuate surface 45 of the second nanomaterial layer 42 is D2. A portion of the dielectric particle 5 is located within the recess 43, and the dielectric particle 5 cannot detach from the area of ​​the recess 43.

[0045] The particle size of the medium particle 5 is D4, where D1 > D4 > D2 > 0. This setting prevents the medium particle 5 from moving randomly between the first nanomaterial layer 41 and the second nanomaterial layer 42, ensuring that the number of medium particles 5 contained in each recess 43 remains constant, and guaranteeing that each part of the two nanomaterial layers can be subjected to relatively uniform impact.

[0046] Sorted according to the surface charge density of the polymer insulating polymer, the greater the difference in relative polarity, the better. The material of the first nanomaterial layer 41 can be a material with strong electrode polarity, such as PTFE. The material of the second nanomaterial layer 42 can be a material with weak electrode polarity, such as high-temperature Nylon. The material of the dielectric particles 5 can be a high-temperature resistant foamed plastic, such as foamed polystyrene, etc.

[0047] When installing the power generation device based on the vibration of the pipe string, the diameter of the dielectric particles 5 is less than D2. The dielectric particles 5 are directly glued into the recesses 43 on the inner and outer cylinder walls using a small amount of hot melt adhesive. Then, the outer cylinder 12 is sleeved outside the inner cylinder 11. After assembly, the whole is subjected to a non-destructive baking process. This causes the glue on the dielectric particles 5 to melt and flow out. At the same time, the dielectric particles 5 undergo a micro-expansion plasticization reaction (the diameter after expansion < D1 or D3). In this way, the dielectric particles 5 can move freely within the recesses 43 and will not fall out of the recesses.

[0048] As shown in Figure 7, the recess 43 includes a bottom wall 44. The bottom wall 44 of the recess 43 of the first nanomaterial layer 41 is separated from the first insulating layer 31. Gas, liquid, or solid can be filled between the bottom wall 44 of the recess 43 of the first nanomaterial layer 41 and the first insulating layer 31. The bottom wall 44 of the recess 43 of the second nanomaterial layer 42 is separated from the second insulating layer 32. Gas, liquid, or solid can be filled between the bottom wall 44 of the recess 43 of the second nanomaterial layer 42 and the second insulating layer 32.

[0049] Specifically, taking the first nanomaterial layer 41 as an example, as shown in Figure 7, the first nanomaterial layer 41 includes a first inner side surface 411 and a first outer side surface 412 that are oppositely arranged along its own thickness direction. The first inner side surface 411 is adhered to the outer wall of the inner cylinder 11. The first outer side surface 412 is recessed towards the first inner side surface 411 to form a recess 43. The recess 43 can be formed by cutting, extrusion, or molding. The first inner side surface 411 of the first nanomaterial layer 41 includes a first region and a plurality of second regions. The plurality of second regions correspond to the positions of the plurality of recesses 43 provided on the surface of the first outer side surface 412. When the surface of the first inner side surface 411 is adhered to the outer wall of the inner cylinder 11, the first region is adhered to the outer wall of the inner cylinder 11, and the plurality of second regions are not adhered to the outer cylinder 12 of the inner cylinder 11, so that the bottom wall 44 of the recess 43 on the first nanomaterial layer 41 is in a separated structure from the outer wall of the inner cylinder 11.

[0050] Similarly, as shown in Figure 7, the second nanomaterial layer 42 includes a second outer surface 421 and a second inner surface 422 disposed opposite to each other along its own thickness direction. The second outer surface 421 is adhered to the inner wall of the outer cylinder 12, and the second inner surface 422 is recessed towards the second outer surface 421 to form a recess 43. This recess 43 can be formed by cutting, extrusion, or molding. The surface of the second outer surface 421 of the second nanomaterial layer 42 includes a first region and a plurality of second regions. The plurality of second regions correspond to the positions of the plurality of recesses 43 disposed on the surface of the second inner surface 422. When the surface of the second outer surface 421 is adhered to the inner wall of the outer cylinder 12, the first region is adhered to the inner wall of the outer cylinder 12, while the plurality of second regions are not adhered to the inner wall of the outer cylinder 12, thereby making the bottom wall 44 of the recess 43 on the second nanomaterial layer 42 separable from the inner wall of the outer cylinder 12.

[0051] By setting the bottom wall 44 to a separable structure from the inner cylinder 11 or outer cylinder 12, the elasticity of the bottom wall 44 is increased, which is conducive to increasing the vibration frequency and amplitude of the medium particles 5. The increased vibration of the medium particles 5 is conducive to promoting friction between the first nanomaterial layer 41 and the second nanomaterial layer 42, thereby enabling the first nanomaterial layer 41, the second nanomaterial layer 42 and the medium particles 5 to form a virtuous cycle.

[0052] The bottom surface 46 of the recess 43 of the first nanomaterial layer 41 protrudes towards the second nanomaterial layer 42, and the recess 43 and bottom surface 46 of the second nanomaterial layer 42 protrude towards the first nanomaterial layer 41. By setting the bottom wall 44 to be convex, the elasticity of the bottom wall 44 is further increased, promoting the vibration of the medium particles 5.

[0053] As shown in Figure 7, the bottom surface 46 of the recess 43 is a spherical cap. Compared with the planar bottom surface 46, when the medium particle 5 is excited to vibrate randomly and comes into contact with the spherical cap, the direction of the reaction force is different. This allows the medium particle 5 to be better bounced to different positions by the reaction force during the random vibration process, so that each part of the opposite nanomaterial layer is uniformly excited by vibration.

[0054] As shown in Figure 8, the outer surface of the medium particle 5 is provided with multiple protrusions 51. By providing multiple protrusions 51 on the surface of the medium particle 5, on the one hand, the adsorption force between the medium particle 5 and the surface of the nanomaterial layer caused by electrostatics or surface tension is reduced, ensuring that the medium particle 5 can easily detach from the surface vibration of the nanomaterial layer. On the other hand, multiple protrusions 51 are conducive to promoting the medium particle 5 to be bounced to different positions, so as to achieve the purpose of uniform excitation.

[0055] The power generation device based on column vibration also includes a rechargeable battery 63. The first nanomaterial layer 41 and the second nanomaterial layer 42 generate electricity through triboelectricity, which can then charge the rechargeable battery 63. A first electrode 61 is disposed between the first nanomaterial layer 41 and the first insulating layer 31. The first nanomaterial layer 41, the first electrode 61, and the first insulating layer 31 are sequentially stacked and connected. A second electrode 62 is disposed between the second nanomaterial layer 42 and the second insulating layer 32. The second nanomaterial layer 42, the second electrode 62, and the second insulating layer 32 are sequentially stacked and connected. Both the first electrode 61 and the second electrode 62 are electrically connected to the rechargeable battery 63. The first nanomaterial layer 41 and the first electrode 61 are electrically connected, and the second nanomaterial layer 42 and the second electrode 62 are electrically connected.

[0056] The first electrode 61 is used to capture the charge generated in the first nanomaterial layer 41, and the second electrode 62 is used to capture the charge generated in the second nanomaterial layer 42. After the n first electrodes 61 and n second electrodes 62 are connected to the n rechargeable batteries 63 to form a charging circuit, the charge is transferred in the charging circuit to form a charging current, thereby powering the n rechargeable batteries 63.

[0057] Multiple first electrodes 61 are arranged at intervals along the axial direction of the inner cylinder 11, with one first electrode 61 located between two adjacent rows of first recesses. Multiple second electrodes 62 are arranged at intervals along the axial direction of the outer cylinder 12, with one second electrode 62 located between two adjacent rows of second recesses. Multiple rechargeable batteries 63 are all located inside the cylinder wall of the outer cylinder 12. The multiple rechargeable batteries 63 can be arranged at intervals along the axial or circumferential direction of the outer cylinder 12. The first electrodes 61 are connected to the rechargeable batteries 63 in a one-to-one correspondence, and the second electrodes 62 are also connected to the rechargeable batteries 63 in a one-to-one correspondence. The multiple rechargeable batteries 63 are connected in parallel.

[0058] The rechargeable battery 63 has a strip-shaped structure and extends axially along the outer cylinder 12. A battery mounting groove 121 is provided inside the cylinder wall of the outer cylinder 12, and multiple rechargeable batteries 63 are arranged at intervals along the circumference of the outer cylinder 12. Each rechargeable battery 63 is fixed by a battery mounting groove 121, ensuring good stability even under long-term vibration and preventing poor contact caused by loose wiring of the rechargeable battery 63.

[0059] The n rechargeable batteries 63 provided in this application embodiment include secondary batteries or capacitors. Exemplarily, the secondary batteries include high-temperature resistant batteries such as ternary lithium batteries or lithium iron phosphate batteries. Ternary lithium batteries can maintain stable performance at high temperatures, with a thermal peak temperature reaching 350℃-500℃. In high-temperature environments, their chemical properties become more stable, ensuring normal battery operation. High-temperature resistant lithium iron phosphate battery packs are generally classified into five levels: 100℃, 125℃, 150℃, 175℃, and above 200℃. Different levels of high-temperature resistant lithium iron phosphate batteries can be selected according to the actual temperature.

[0060] For example, the capacitors selected are high-temperature resistant supercapacitors, such as tantalum capacitors, aluminum electrolytic capacitors, and ceramic capacitors.

[0061] In some embodiments, there are multiple first electrodes 61, which are evenly distributed along the outer wall of the inner cylinder 11. The multiple first electrodes 61 are connected in parallel to gather the charge generated on each part of the first nanomaterial layer 41 to the charging circuit.

[0062] In some embodiments, there are multiple second electrodes 62, which are uniformly distributed along the inner wall of the outer cylinder 12, and are connected in parallel to gather the charge generated on the second nanomaterial layer 42 to the charging circuit.

[0063] As shown in Figure 9, the power generation device based on the vibration of the tube column also includes a voltage stabilizing and rectifying module 64. The voltage stabilizing and rectifying module 64 can be an existing bridge rectifier module. The first electrode 61 and the second electrode 62 are connected to the rechargeable battery 63 through the voltage stabilizing and rectifying module 64. The voltage stabilizing and rectifying module 64 is located inside the cylinder wall of the outer cylinder 12.

[0064] As shown in Figure 9, the power generation device based on column vibration also includes a power management module 65. The power generation device based on column vibration includes n rechargeable batteries 63. The power management module 65 can control the multiple rechargeable batteries 63 to charge and supply power sequentially in the order of the first rechargeable battery 63, the second rechargeable battery 63, the third rechargeable battery 63, the fourth rechargeable battery 63 to the nth rechargeable battery 63. The power management module 65 is connected to a power output port 66.

[0065] Taking the aforementioned supercapacitor as an example, the rechargeable battery 63:

[0066] During charging, the rectified electrical energy first charges the first rechargeable battery 63. After it is fully charged, the first rechargeable battery 63 stops charging, and the charging switches to the second rechargeable battery 63, and so on, until the nth rechargeable battery 63 is fully charged. When all n rechargeable batteries 63 are fully charged, the entire rechargeable battery group 63 is equivalent to an open circuit, and the generated electrical energy no longer charges the previous rechargeable batteries 63.

[0067] During power supply, the first rechargeable battery 63 initially powers the downhole tools or sensors. When the power of the first rechargeable battery 63 drops below 20%, the power supply switches to the second rechargeable battery 63, and so on, until the nth rechargeable battery 63. Each rechargeable battery 63 is designed to have 80% of its capacity sufficient to meet at least one power supply requirement. For example, the device provided in this embodiment is designed to power a downhole radio electromagnetic wave monitoring system, which requires 450 joules of energy per operation, and a single rechargeable battery 63 is designed to have a capacity of 600 joules.

[0068] When used downhole, as shown in Figure 1, the ends of the inner cylinder 11 and / or outer cylinder 12 of the power generation device 8 based on tubing vibration are connected and fixed to the ends (upper and lower ends) of the tubing 7. The inner cavity of the inner cylinder 11 is connected to the inner cavity of the tubing, and the inner cavity of the inner cylinder 11 is a channel for fluid to pass through.

[0069] The following describes a power generation method based on tubular vibration. This method utilizes the aforementioned tubular vibration-based power generation device and includes the following steps:

[0070] The medium particle 5 is in contact with or separates from the first nanomaterial layer 41, and the medium particle 5 is also in contact with or separates from the second nanomaterial layer 42.

[0071] This application utilizes the principle of triboelectric nano-power generation. A first nanomaterial layer 41 is provided on the outer wall of the inner cylinder 11, and a second nanomaterial layer 42 is provided on the inner wall of the outer cylinder 12. Multiple recesses 43 are provided on the surface of the first nanomaterial layer 41 and / or the second nanomaterial layer 42, and medium particles 5 are contained in the recesses 43. When the fluid flows through the inner cylinder 11 and generates a small vibration, it causes the first nanomaterial layer 41 and / or the second nanomaterial layer 42 to vibrate, and at the same time, it causes the medium particles 5 to vibrate. The medium particles 5 come into contact with or separate from the first nanomaterial layer 41 and the second nanomaterial layer 42. When the medium particles 5 bounce, they repeatedly hit the first nanomaterial layer 41 and the second nanomaterial layer 42, which intensifies the vibration of the first nanomaterial layer 41 and the second nanomaterial layer 42, thereby increasing the contact points and the frequency of contact and separation, and thus increasing the power generation.

[0072] Furthermore, as the dielectric particles 5 repeatedly move between the first nanomaterial layer 41 and the second nanomaterial layer 42, they also play a role in transferring charge, thereby further increasing the power generation. Moreover, when the multiple dielectric particles 5 are subjected to vibration, due to the slight differences in mass and surface flatness between the particles, the multiple dielectric particles as a whole exhibit disordered vibration. The impact force generated by the dielectric particles 5 only intensifies the vibration of the nanomaterial layer near the recess 43, without causing intensified vibration of the entire inner cylinder 11 or the entire outer cylinder 12. This achieves both enhanced contact and separation between the internal dielectric particles 5 and the first nanomaterial layer 41 and the second nanomaterial layer 42 for power generation, and avoids intensified vibration of the installation structure connected to the oil pipe.

[0073] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "second" or "secondary" in the description of this application is only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0074] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0075] In the description of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0076] The above description is merely a specific embodiment of this application and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this application should still fall within the scope of this application. Furthermore, the technical features, technical solutions, and embodiments in this application can be freely combined and used.

Claims

1. A power generation device based on tubular vibration, characterized in that, The power generation device based on column vibration includes an inner cylinder (11) and an outer cylinder (12) with inner and outer sleeves. An annular space (2) is formed between the inner cylinder (11) and the outer cylinder (12). Medium particles (5) are disposed in the annular space (2). A first nanomaterial layer (41) is disposed on the outer peripheral surface of the inner cylinder (11), and a second nanomaterial layer (42) is disposed on the inner peripheral surface of the outer cylinder (12). A recess (43) is disposed on the outer peripheral surface of the first nanomaterial layer (41) and / or the inner peripheral surface of the second nanomaterial layer (42). The medium particles (5) are located in the recess (43). The medium particles (5) can contact or separate from the first nanomaterial layer (41), and the medium particles (5) can also contact or separate from the second nanomaterial layer (42).

2. The power generation device based on tube column vibration according to claim 1, characterized in that, A first insulating layer (31) is provided between the inner cylinder (11) and the first nanomaterial layer (41), and a second insulating layer (32) is provided between the outer cylinder (12) and the second nanomaterial layer (42).

3. The power generation device based on tube column vibration according to claim 2, characterized in that, The outer peripheral surface of the first nanomaterial layer (41) is provided with a plurality of recesses (43), and the plurality of recesses (43) on the outer peripheral surface of the first nanomaterial layer (41) are arranged in rows and columns. The inner peripheral surface of the second nanomaterial layer (42) is provided with a plurality of recesses (43), and the plurality of recesses (43) on the inner peripheral surface of the second nanomaterial layer (42) are arranged in rows and columns.

4. The power generation device based on tube column vibration according to claim 3, characterized in that, The multiple recesses (43) on the outer peripheral surface of the first nanomaterial layer (41) are staggered from the multiple recesses (43) on the inner peripheral surface of the second nanomaterial layer (42).

5. The power generation device based on tube column vibration according to claim 4, characterized in that, The distance between the bottom surface (46) of the recess (43) on the outer peripheral surface of the first nanomaterial layer (41) and the arcuate surface (45) of the second nanomaterial layer (42) is equal to the distance between the bottom surface (46) of the recess (43) on the inner peripheral surface of the second nanomaterial layer (42) and the arcuate surface (45) of the first nanomaterial layer (41).

6. The power generation device based on tube column vibration according to claim 4, characterized in that, The distance between the arcuate portion (45) of the first nanomaterial layer (41) and the arcuate portion (45) of the second nanomaterial layer (42) is less than the particle size of the medium particle (5), and a portion of the medium particle (5) is located in the recess (43).

7. The power generation device based on tube column vibration according to claim 2, characterized in that, The recess (43) contains a bottom wall (44). The bottom wall (44) of the recess (43) of the first nanomaterial layer (41) is separated from the first insulating layer (31), and the bottom wall (44) of the recess (43) of the second nanomaterial layer (42) is separated from the second insulating layer (32).

8. The power generation device based on tube column vibration according to claim 1, characterized in that, The bottom surface (46) of the recess (43) of the first nanomaterial layer (41) protrudes toward the second nanomaterial layer (42), and the recess (43) and bottom surface (46) of the second nanomaterial layer (42) protrude toward the first nanomaterial layer (41).

9. The power generation device based on tube column vibration according to claim 1, characterized in that, The bottom surface (46) of the concave part (43) is a spherical cap surface.

10. The power generation device based on tube column vibration according to claim 1, characterized in that, The outer surface of the medium particle (5) is provided with multiple protrusions (51).

11. The power generation device based on tube column vibration according to claim 2, characterized in that, The power generation device based on column vibration also includes a rechargeable battery (63), a first electrode (61) is disposed between the first nanomaterial layer (41) and the first insulating layer (31), and a second electrode (62) is disposed between the second nanomaterial layer (42) and the second insulating layer (32). Both the first electrode (61) and the second electrode (62) are connected to the rechargeable battery (63).

12. The power generation device based on column vibration according to claim 11, characterized in that, Multiple first electrodes (61) are arranged at intervals along the axial direction of the inner cylinder (11), multiple second electrodes (62) are arranged at intervals along the axial direction of the outer cylinder (12), and multiple rechargeable batteries (63) are located inside the cylinder wall of the outer cylinder (12). The first electrodes (61) and rechargeable batteries (63) are connected one-to-one, and the second electrodes (62) and rechargeable batteries (63) are also connected one-to-one. The multiple rechargeable batteries (63) are connected in parallel.

13. The power generation device based on tube column vibration according to claim 12, characterized in that, The rechargeable battery (63) has a strip-shaped structure and extends along the axial direction of the outer cylinder (12). Multiple rechargeable batteries (63) are arranged at intervals along the circumference of the outer cylinder (12).

14. The power generation device based on column vibration according to claim 11, characterized in that, The power generation device based on the vibration of the tube column also includes a voltage stabilizing and rectifying module (64). The first electrode (61) and the second electrode (62) are connected to the rechargeable battery (63) through the voltage stabilizing and rectifying module (64). The voltage stabilizing and rectifying module (64) is located inside the cylinder wall of the outer cylinder (12).

15. The power generation device based on column vibration according to claim 11, characterized in that, The power generation device based on column vibration also includes a power management module (65), which can control multiple rechargeable batteries (63) to charge and supply power sequentially in the order of the first rechargeable battery (63) to the nth rechargeable battery (63).

16. A power generation device based on tube column vibration, characterized in that, The power generation device based on column vibration includes: Inner cylinder (11); An outer cylinder (12) is fitted outside the inner cylinder (11), and an annular space (2) is formed between the inner cylinder (11) and the outer cylinder (12); The first nanomaterial layer (41) is disposed on the outer peripheral surface of the inner cylinder (11); A second nanomaterial layer (42) is disposed on the inner circumferential surface of the outer cylinder (12), wherein the outer circumferential surface of the first nanomaterial layer (41) and / or the inner circumferential surface of the second nanomaterial layer (42) are provided with recesses (43). Medium particles (5) are disposed within the annular space (2) and located within the recess (43); The radial width of the annular space (2) at the recess (43) is greater than the particle size of the medium particle (5) to allow the medium particle (5) to jump and collide with the first nanomaterial layer (41) and the second nanomaterial layer (42) within the recess (43).

17. The power generation device based on tube column vibration according to claim 16, characterized in that, The outer peripheral surface of the first nanomaterial layer (41) is provided with a recess (43), and the bottom wall (44) of the recess (43) protrudes towards the second nanomaterial layer (42) to form an elastic space between the bottom wall (44) of the recess and the outer surface of the inner cylinder (11); and / or The inner circumferential surface of the second nanomaterial layer (42) is provided with a recess (43), and the bottom wall (44) of the recess (43) protrudes toward the first nanomaterial layer (41) to form an elastic space between the bottom wall (44) of the recess and the inner side surface of the outer cylinder (12).

18. The power generation device based on column vibration according to claim 16 or 17, characterized in that, The recesses (43) are spaced apart in the circumferential and axial directions of the inner cylinder (11) or the outer cylinder (12).

19. A power generation method based on tube column vibration, characterized in that, The power generation method based on tube column vibration employs the power generation device based on tube column vibration as described in any one of claims 1 to 18, and the power generation method based on tube column vibration includes the following steps: The medium particles (5) are in contact with or separated from the first nanomaterial layer (41), and the medium particles (5) are also in contact with or separated from the second nanomaterial layer (42).

Images