Discharge type plasma shock wave dredging and unblocking device for underground stratum of oil and gas well

Abstract

The invention relates to the technical field of oil and gas well underground dredging and unblocking, and provides an oil and gas well underground stratum discharge type plasma shock wave dredging and unblocking device which comprises a shell, a liquid circulation channel arranged in the shell, an energy storage assembly arranged in the liquid circulation channel and an outer pipe arranged on the outer side of the liquid circulation channel. A spraying barrel is arranged at the bottom of the liquid flowing channel, a plurality of perforation holes are evenly distributed in the barrel wall of the spraying barrel, a protruding block is fixedly connected into each perforation hole and evenly distributed on the inner wall of the perforation hole, and a metal wire is arranged in the middle of the spraying barrel; bubbles are mechanically broken through the arc-shaped protruding blocks on the inner wall of the spraying barrel, dynamic compression of the isolation assembly is combined, the volume fraction of residual bubbles is further reduced, the electric field uniformity during plasma generation is ensured, the discharging stability is remarkably improved through the multi-stage bubble eliminating technology, local overheating and electrode damage caused by the bubbles are reduced, and the service life of the device is prolonged. Therefore, the generation efficiency of plasma shock waves and the success rate of blockage removal operation are improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas well underground dredging and blockage removal, in particular to an oil and gas well underground formation discharge type plasma shock wave dredging and blockage removal device. Background Art

[0002] During the development of oil and gas fields, blockages in underground formations caused by scaling, wax deposition, or sand burial have long restricted the productivity of oil and gas wells. Traditional deblocking technologies such as chemical cleaning, mechanical drilling and grinding, or hydraulic jetting have some effects, but they have limitations such as high operating costs, serious environmental pollution, or low efficiency in deep deblocking. In recent years, plasma shock wave technology has attracted widespread attention due to its non-contact and efficient deblocking characteristics. It generates plasma arcs through high-voltage pulse discharges and uses the mechanical and thermal effects of shock waves to break up formation blockages.

[0003] However, existing plasma declogging devices still face three major technical bottlenecks: first, the presence of bubbles in the liquid medium will significantly reduce the uniformity of the electric field, resulting in unstable discharge or even failure; second, the energy utilization rate of a single discharge is low, and the shock wave action range is limited, making it difficult to cover deep blockage areas; third, the liquid consumption during the operation is large, and the residual liquid heat energy is not effectively utilized, resulting in high costs. Summary of the Invention

[0004] The present invention provides a discharge-type plasma shock wave unblocking and unblocking device for underground formations in oil and gas wells. Through a delayed superposition discharge mechanism and the design of interlaced electrode modules, after the primary electrode ring group generates an initial plasma arc, the secondary electrode ring group releases secondary energy with a microsecond delay, forming energy superposition in time and space. This design increases the peak pressure of the shock wave and expands the effective radius. A single discharge can cover the underground formation, greatly reducing the need for repeated operations, improving operation efficiency and deep-layer unblocking capabilities, and thus solving the problems raised in the background technology.

[0005] The technical solution of the present invention is as follows: A discharge-type plasma shock wave unblocking and unblocking device for formations in oil and gas wells, comprising: a shell, a liquid circulation channel is provided in the shell, an energy storage component is provided in the liquid circulation channel, if there is excess liquid left in the nozzle after the shock is completed, the liquid with plasma can be stored through the energy storage component, an outer tube is provided on the outside of the liquid circulation channel, a first electrode ring group 1 and a first electrode ring group 2 are provided at the bottom of the outer tube, a nozzle is provided at the bottom of the liquid circulation channel, a second electrode ring group 1 and a second electrode ring group 2 are provided at the bottom of the nozzle, a plurality of perforations are evenly distributed on the wall of the nozzle, each of the perforations is fixedly connected to a protrusion, the protrusions are evenly distributed on the inner wall of the perforation, the liquid contacts the protrusion when flowing out, the liquid is squeezed by the protrusion so that the bubbles in the liquid are dissipated by collision, and both ends of each protrusion are arc-shaped, so that the liquid can flow smoothly from the surface of the protrusion without generating new bubbles, and a metal wire is provided in the middle of the nozzle.

[0006] Furthermore, the energy storage component includes an energy storage empty tube fixedly connected to the liquid circulation channel, which is used to store liquid with plasma. The bottom of the energy storage empty tube is located in the nozzle, and an isolation component is provided on the top of the energy storage empty tube, which is used to isolate the liquid with plasma from ordinary liquid. A through groove is provided at the bottom of the energy storage empty tube for liquid to flow into the energy storage empty tube. A magnet block is slidably connected to the energy storage empty tube, and the bottom of the magnet block is fixedly connected to a fixing rod, which extends to the bottom of the energy storage empty tube. The bottom of the fixing rod is fixedly connected to a U-shaped block, and the bottom of the U-shaped block is fixedly connected to a slider with the same size as that in the energy storage empty tube.

[0007] Furthermore, a blocking block is provided at the bottom of the energy storage empty tube to block the through groove. One side of the blocking block is rotatably connected to the energy storage empty tube to ensure the stability of the blocking block. The blocking block is located at the top of the through groove. The upper half of the energy storage empty tube is provided with a water outlet to facilitate the outflow of stored liquid.

[0008] Furthermore, a thin sheet is provided on the water outlet, and the thin sheet is evenly distributed on the inner wall of the water outlet, so that the energy storage empty tube is in a closed space. The material of the thin sheet is a memory metal sheet. When the liquid is pushed upward by the slider, the liquid contacts the fixed plate and flows out from the weakest part of the energy storage empty tube, thereby flushing the thin sheet. After the liquid flows out, the thin sheet returns to its original state. The energy storage empty tube is fixedly connected to a fixed plate at the top of the water outlet, and an insulation layer is provided on the tube wall of the energy storage empty tube to reduce the loss of liquid heat.

[0009] Furthermore, a second through slot is provided in the middle of the slider, and the two ends of the U-shaped block are located on both sides of the second through slot, which will not affect the rotation of the second blocking block. The slider has square slots on the inner walls of both ends of the second through slot, and square blocks are slidably connected in the two square slots. A spring is fixedly connected between the square block and the square slot. A second blocking block is provided on the top of the second through groove, and a heat-insulating space is formed between the second blocking block and the square block to keep the liquid in the energy storage empty tube warm. One end of the second blocking block is rotatably connected to the inner wall of the second through groove, and an inclined surface is provided on the opposite side of the bottom of the two square blocks, and the liquid flushes the square blocks through the inclined surfaces on both sides.

[0010] Furthermore, the isolation assembly includes a chassis slidably connected to the energy storage empty tube, and a magnet block 2 is provided on the inner side of the chassis. Magnet block 1 and magnet block 2 attract each other, and magnet block 2 drives magnet block 1 to move when it moves. A plurality of limit blocks 1 are fixedly connected to the outer side of the chassis, and the chassis is provided with limit grooves with the same number as the limit blocks 1. Each of the limit blocks 1 is slidably connected to the inner wall of the liquid circulation channel, and the top opposite side of each limit block 1 is fixedly connected to a shell, and the bottom of the shell is fixedly connected to a baffle between the limit blocks 1. The material of the baffle is memory metal, which is used to prevent liquid from entering the shell.

[0011] Furthermore, an electric telescopic rod is fixedly connected to the inner wall of the liquid circulation channel, and the output end of the electric telescopic rod is fixedly connected to a connecting block 1, and a sleeve is slidably connected to the energy storage empty tube, and the sleeve passes through the top of the shell and is fixedly connected to the connecting block 1, and the sleeve is fixedly connected to a plurality of connecting blocks 2 in the part inside the shell, and the connecting blocks 2 correspond one to the limit grooves, and each of the connecting blocks 2 is rotatably connected to a connecting rod group at the upper and lower ends, and the end of the connecting rod group away from the connecting block 2 is rotatably connected to the limit block 2, and the limit block 2 is slidably connected in the limit groove, and the end of the limit block 2 away from the connecting rod group is fixedly connected to the limit block 3, and the limit block 3 is arc-shaped and is located between the limit block 1.

[0012] Furthermore, the first electrode ring group one and the first electrode ring group two are both composed of a combination of multiple electrode modules, and the electrode modules in the first electrode ring group one and the first electrode ring group two are arranged alternately, and the second electrode ring group one and the second electrode ring group two are both composed of a combination of multiple electrode modules, and the combination method is the same as the combination method of the first electrode ring group one and the first electrode ring group two, and the first electrode ring group one, the second electrode ring group one and the first electrode ring group two, and the second electrode ring group two are alternately energized through a control system.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention mechanically breaks bubbles through arc-shaped protrusions on the inner wall of the nozzle, combined with dynamic compression of the isolation component, to further reduce the volume fraction of residual bubbles and ensure the uniformity of the electric field during plasma generation. This multi-stage bubble elimination technology significantly improves discharge stability and reduces local overheating and electrode damage caused by bubbles, thereby improving the efficiency of plasma shock wave generation and the success rate of unblocking operations.

[0014] 2. The present invention adopts a delayed superposition discharge mechanism and the design of an interlaced electrode module. After the first electrode ring group generates the initial plasma arc, the secondary electrode ring group releases secondary energy with a microsecond delay, forming energy superposition in time and space. This design increases the peak pressure of the shock wave and expands the effective radius. A single discharge can cover the underground formation, greatly reducing the need for repeated operations and improving operation efficiency and deep-layer blockage removal capabilities.

[0015] 3. The present invention recovers the residual liquid in the spray barrel and uses magnetic coupling and memory metal baffles to achieve liquid sealed storage and pressure compensation. At the same time, the liquid recycling design reduces the amount of fresh liquid replenished and reduces operating costs. In addition, the recycling of residual liquid heat energy also improves energy utilization efficiency, further enhancing the economy and environmental protection of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the device of the present invention; Figure 2 It is a structural diagram of the device of the present invention; Figure 3 This is a structural diagram of the water outlet of the device of the present invention; Figure 4 It is a structural diagram of the isolation component of the device of the present invention; Figure 5 It is a structural diagram of the slider of the device of the present invention; Figure 6 This invention Figure 2 Enlarged view of point A in the middle; Figure 7 This invention Figure 2 Enlarged view of point B in the middle.

[0017] In the picture: 1. Shell; 2. Liquid flow channel; 3. Energy storage component; 31. Energy storage empty pipe; 311. Blocking block 1; 312. Water outlet; 3121. Thin sheet; 3122. Fixing plate; 3123. Insulation layer; 32. Isolation component; 321. Chassis; 322. Magnet block 2; 323. Limiting block 1; 324. Limiting groove; 325. Shell; 326. Baffle; 3261. Electric telescopic rod; 3262. Connecting block 1; 3263. Sleeve; 3264. Connecting block 2; 3265. Connecting rod group; 3 266. Limit block 2; 3267. Limit block 3; 33. Through slot 1; 34. Magnet block 1; 35. Fixing rod; 36. U-shaped block; 37. Slider; 371. Through slot 2; 3711. Block 2; 372. Square slot; 373. Square block; 374. Spring; 4. Outer tube; 41. First electrode ring group 1; 411. Electrode module; 42. First electrode ring group 2; 5. Spray gun; 51. Perforator; 52. Bump; 6. Metal wire; 61. Second electrode ring group 1; 62. Second electrode ring group 2. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0019] like Figure 1-Figure 7 As shown, the present invention provides an oil and gas well underground formation discharge plasma shock wave dredging and unblocking device, comprising: a shell 1, a liquid circulation channel 2 is provided in the shell 1, and an energy storage component 3 is provided in the liquid circulation channel 2. If there is excess liquid left in the nozzle 5 after the shock is completed, the liquid with plasma can be stored through the energy storage component 3. An outer tube 4 is provided on the outside of the liquid circulation channel 2, and a first electrode ring group 1 41 and a first electrode ring group 2 42 are provided at the bottom of the outer tube 4. The nozzle 5 is provided at the bottom of the liquid circulation channel 2. The bottom of the nozzle 5 is provided with a second electrode ring group 1 61 and a second electrode ring group 2 62. A plurality of perforations 51 are evenly distributed on the wall of the nozzle 5. A protrusion 52 is fixedly connected to each of the perforations 51. The protrusions 52 are evenly distributed on the inner wall of the perforations 51. When the liquid flows out, it contacts the protrusions 52. The liquid is squeezed by the protrusions 52 so that the bubbles in the liquid are dissipated by collision. Both ends of each protrusion 52 are arc-shaped, so that the liquid can flow smoothly from the surface of the protrusion 52 without generating new bubbles. A metal wire 6 is provided in the middle of the nozzle 5.

[0020] As a technical solution of the present invention, the energy storage component 3 includes an energy storage empty tube 31 fixedly connected to the liquid circulation channel 2, for storing liquid with plasma, the bottom of the energy storage empty tube 31 is located in the nozzle 5, and the top of the energy storage empty tube 31 is provided with an isolation component 32, for isolating the liquid with plasma from ordinary liquid, and the bottom of the energy storage empty tube 31 is provided with a through groove 33 for liquid to flow into the energy storage empty tube 31, and a magnet block 34 is slidably connected to the energy storage empty tube 31, and the bottom of the magnet block 34 is fixedly connected to a fixing rod 35, and the fixing rod 35 extends to the bottom of the energy storage empty tube 31, and the bottom of the fixing rod 35 is fixedly connected to a U-shaped block 36, and the bottom of the U-shaped block 36 is fixedly connected to a slider 37 of the same size as that in the energy storage empty tube 31. When the magnet block 34 moves, it drives the fixing rod 35 and the slider 37 to move synchronously.

[0021] As a technical solution of the present invention, a blocking block 311 is provided at the bottom of the energy storage empty tube 31 to block the through groove 33. One side of the blocking block 311 is rotatably connected to the energy storage empty tube 31 to ensure the stability of the blocking block 311. The blocking block 311 is located at the top of the through groove 33. The upper half of the energy storage empty tube 31 is provided with a water outlet 312 to facilitate the outflow of stored liquid.

[0022] As a technical solution of the present invention, a thin sheet 3121 is provided on the water outlet 312, and the thin sheets 3121 are evenly distributed on the inner wall of the water outlet 312, so that the energy storage empty tube 31 is in a closed space. The material of the thin sheet 3121 is a memory metal sheet. When the liquid is pushed upward by the slider 37, the liquid contacts the fixed plate 3122 and flows out from the weakest part of the energy storage empty tube, thereby breaking open the thin sheet 3121. After the liquid flows out, the thin sheet 3121 returns to its original state. The energy storage empty tube 31 is fixedly connected to the fixed plate 3122 at the top of the water outlet 312, and an insulation layer 3123 is provided on the tube wall of the energy storage empty tube 31 to reduce the loss of heat of the liquid.

[0023] As a technical solution of the present invention, a second through-slot 371 is formed in the middle of the slider 37. The two ends of the U-shaped block 36 are located on both sides of the second through-slot 371 so as not to affect the rotation of the second blocking block 3711. The slider 37 has square grooves 372 formed on the inner walls of both ends of the second through-slot 371. Square blocks 373 are slidably connected in the two square grooves 372. A spring 374 is fixedly connected between the square blocks 373 and the square grooves 372. A second blocking block 3711 is provided on the top of the second through-slot 371. A heat-insulating space is formed between the second blocking block 3711 and the square block 373 to keep the liquid in the energy storage empty tube 31 warm. One end of the second blocking block 3711 is rotatably connected to the inner wall of the second through-slot 371. The bottoms of the two square blocks 373 are provided with inclined surfaces on opposite sides. The liquid passes through the inclined surfaces on both sides to flush the square blocks 373 open. When the U-shaped block 36 drives the slider 37 to move upward, the volume between the slider 37 and the block 1 311 decreases, the gas is compressed, and the pressure increases. Under the action of the external atmospheric pressure, the block 1 311 rotates in the energy storage tube 31, opening the through groove 1 33. The residual liquid in the spray barrel 5 enters the energy storage tube 31 through the through groove 1 33, reducing heat loss. When the U-shaped block 36 drives the slider 37 to move downward, the liquid between the slider 37 and the block 1 311 is squeezed, and the inclined surfaces on both sides of the square block 373 push the square block 373 to move to both sides. The square block 373 slides in the square groove 372 and compresses the spring 374. Then the liquid pushes the block 2 3711 away and enters the space above the slider 37, waiting to flow out for secondary use.

[0024] As a technical solution of the present invention, the isolation component 32 includes a chassis 321 slidably connected to the energy storage empty tube 31, and a magnet block 2 322 is provided on the inner side of the chassis 321. The magnet block 1 34 and the magnet block 2 322 attract each other, and the magnet block 2 322 drives the magnet block 1 34 to move when moving. A plurality of limit blocks 1 323 are fixedly connected to the outer side of the chassis 321, and the chassis 321 is provided with limit grooves 324 with the same number as the limit blocks 1 323. Each of the limit blocks 1 323 is slidably connected to the inner wall of the liquid circulation channel 2, and the opposite side of the top of each limit block 1 323 is fixedly connected to a shell 325. The bottom of the shell 325 is fixedly connected to a baffle 326 between the limit blocks 1 323. The material of the baffle 326 is memory metal, which is used to prevent liquid from entering the shell 325.

[0025] As a technical solution of the present invention, an electric telescopic rod 3261 is fixedly connected to the inner wall of the liquid circulation channel 2, and the output end of the electric telescopic rod 3261 is fixedly connected to a connecting block 1 3262. A sleeve 3263 is slidably connected to the energy storage hollow tube 31, and the sleeve 3263 passes through the top of the shell 325 and is fixedly connected to the connecting block 1 3262. The sleeve 3263 is fixedly connected to a plurality of connecting blocks 2 3264 on the inner part of the shell 325. The connecting block 2 3264 Corresponding one to one with the limit groove 324, each of the upper and lower ends of the connecting block 2 3264 are rotatably connected with a connecting rod group 3265, and the end of the connecting rod group 3265 away from the connecting block 2 3264 is rotatably connected to the limit block 2 3266, and the limit block 2 3266 is slidably connected in the limit groove 324, and the end of the limit block 2 3266 away from the connecting rod group 3265 is fixedly connected to the limit block 3 3267, and the limit block 3 3267 is arc-shaped and is located between the limit blocks 1 323.

[0026] As a technical solution of the present invention, the first electrode ring group 1 41 and the first electrode ring group 2 42 are both composed of a plurality of electrode modules 411, and after the electrode modules 411 in the first electrode ring group 1 41 and the first electrode ring group 2 42 are staggered, the second electrode ring group 1 61 and the second electrode ring group 2 62 are both composed of a plurality of electrode modules 411, and the combination method is the same as the combination method of the first electrode ring group 1 41 and the first electrode ring group 2 42, and the first electrode ring group 1 41, the second electrode ring group 1 61 and the first electrode ring group 2 42, the second electrode ring group 2 62 are alternately energized through a control system.

[0027] Working principle: like Figure 1-Figure 2 As shown, first, liquid enters the liquid circulation channel 2 of the device, providing a medium for plasma generation and shock wave release; when dredging operations are required, the staff starts the high-power pulse power supply through the control system, first supplying power to the first electrode ring group 1 41. This step generates an initial plasma arc, marking the beginning of plasma shock wave generation. Subsequently, after a microsecond delay, the first electrode ring group 2 42 releases secondary energy to form a superimposed shock wave with the initial plasma arc. This delayed superposition discharge mechanism effectively extends the effective range of the shock wave and improves energy utilization. Immediately thereafter, the second electrode ring group 1 61 and the second electrode ring group 2 62 are synchronously energized to transmit the shock wave to the metal wire 6 area at the bottom of the nozzle 5. Through the delayed discharge design of the staggered electrode module 411, the shock wave energy is further superimposed in time and space, so that the effective range of the shock wave is significantly improved. This design ensures that a single discharge can cover the underground formation, greatly reducing the need for repeated operations and improving operation efficiency.

[0028] like Figure 3-Figure 7 As shown, at the same time as the shock wave is released, the device starts the electric telescopic rod 3261, pushing the connecting block 1 3262, and the connecting block 1 3262 then pushes the sleeve 3263 to slide downward on the energy storage empty tube 31, and drives the connecting block 2 3264 to move synchronously, and the connecting block 2 3264 drives the connecting rod group 3265 to move, pushing the limit block 2 3266 to slide in the limit groove 324 in the direction away from the connecting rod group 3265, and the limit block 2 3266 pushes the limit block 3 3267 to move synchronously, so that each limit block 3 3267 is stuck between the limit blocks 1 323 and contacts the inner wall of the liquid circulation channel 2, thereby blocking the liquid circulation channel 2, isolating the two spaces, and reducing energy loss.

[0029] like Figure 2-Figure 7 As shown, as the electric telescopic rod 3261 continues to push, the sleeve 3263 is pushed into the interior of the housing 325. At this time, the connecting block 1 3262 pushes the housing 325 to slide downward, and drives the limit block 1 323 and the chassis 321 to move synchronously, compressing the space of the liquid. If there are bubbles in the liquid at this time, during the compression process of the chassis 321, the bubbles will contact the liquid flow channel 2, the inner wall of the spray cylinder 5 and the top of the chassis 321 and burst, thereby preliminarily reducing the bubbles in the liquid and improving the stability of plasma generation. At the same time, when the chassis 321 moves downward, the magnet block 1 34 drives the magnet block 2 322 to move synchronously, and the magnet block 2 322 drives the fixing rod 35 to move downward, causing the slider 37 to move downward. This action squeezes the liquid initially stored between the slider 37 and the block 1 311, and pushes the square block 373 to move to both sides through the inclined surfaces on both sides of the square block 373. The square block 373 slides in the square groove 372 and compresses the spring 374. Then, the liquid pushes the block 2 3711 away and enters the space above the slider 37, waiting to flow out for secondary utilization.

[0030] like Figure 2-Figure 6 As shown, when the U-shaped block 36 drives the slider 37 to move upward, the volume between the slider 37 and the block 1 311 decreases, the gas is compressed, and the pressure increases. Under the action of the external atmospheric pressure, the block 1 311 rotates in the energy storage empty tube 31, opening the through groove 1 33, so that the residual liquid in the spray barrel 5 enters the energy storage empty tube 31 through the through groove 1 33, reducing heat loss.

[0031] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A discharge plasma shock wave unblocking device for formations in oil and gas wells, comprising: A shell (1) is characterized in that: a liquid circulation channel (2) is provided in the shell (1), an energy storage component (3) is provided in the liquid circulation channel (2), an outer tube (4) is provided on the outside of the liquid circulation channel (2), a first electrode ring group 1 (41) and a first electrode ring group 2 (42) are provided at the bottom of the outer tube (4), a nozzle (5) is provided at the bottom of the liquid circulation channel (2), a second electrode ring group 1 (61) and a second electrode ring group 2 (62) are provided at the bottom of the nozzle (5), a plurality of perforations (51) are evenly distributed on the wall of the nozzle (5), each of the perforations (51) is fixedly connected with a protrusion (52), the protrusions (52) are evenly distributed on the inner wall of the perforation (51), and both ends of each protrusion (52) are arc-shaped, and a metal wire (6) is provided in the middle of the nozzle (5).

2. The device for clearing and unblocking oil and gas well formations by discharge-type plasma shock waves according to claim 1, characterized in that: The energy storage component (3) includes an energy storage hollow tube (31) fixedly connected to the liquid circulation channel (2), the bottom of the energy storage hollow tube (31) is located in the spray barrel (5), the top of the energy storage hollow tube (31) is provided with an isolation component (32), the bottom of the energy storage hollow tube (31) is provided with a through groove (33), a magnet block (34) is slidably connected to the energy storage hollow tube (31), the bottom of the magnet block (34) is fixedly connected to a fixing rod (35), the fixing rod (35) extends to the bottom of the energy storage hollow tube (31), the bottom of the fixing rod (35) is fixedly connected to a U-shaped block (36), and the bottom of the U-shaped block (36) is fixedly connected to a slider (37) with the same size as that of the energy storage hollow tube (31).

3. The device for clearing and unblocking oil and gas well formations by discharge-type plasma shock waves as claimed in claim 2, characterized in that: A blocking block (311) for blocking the through groove (33) is provided at the bottom of the energy storage empty tube (31), one side of the blocking block (311) is rotatably connected to the inside of the energy storage empty tube (31), the blocking block (311) is located at the top of the through groove (33), and a water outlet (312) is provided at the upper half of the energy storage empty tube (31).

4. The device for clearing and unblocking oil and gas well formations by discharge-type plasma shock waves as claimed in claim 3, characterized in that: The water outlet (312) is provided with a thin sheet (3121), the thin sheets (3121) are evenly distributed on the inner wall of the water outlet (312), the material of the thin sheet (3121) is a memory metal sheet, the energy storage empty tube (31) is fixedly connected to a fixing plate (3122) at the top of the water outlet (312), and a heat insulation layer (3123) is provided on the tube wall of the energy storage empty tube (31).

5. The device for clearing and unblocking oil and gas well formations by discharge-type plasma shock waves as claimed in claim 4, characterized in that: A second through slot (371) is provided in the middle of the slider (37), and two ends of the U-shaped block (36) are located on both sides of the second through slot (371). The slider (37) is provided with square slots (372) on the inner walls of both ends of the second through slot (371). Square blocks (373) are slidably connected in the two square slots (372), and a spring (374) is fixedly connected between the square block (373) and the square slot (372). A second blocking block (3711) is provided on the top of the second through slot (371), one end of the second blocking block (3711) is rotatably connected to the inner wall of the second through slot (371), and an inclined surface is provided on the opposite side of the bottom of the two square blocks (373).

6. The device for clearing and unblocking oil and gas well formations by discharge-type plasma shock waves as claimed in claim 5, characterized in that: The isolation assembly (32) includes a chassis (321) slidably connected to the energy storage hollow tube (31), a magnet block 2 (322) is provided on the inner side of the chassis (321), a plurality of limit blocks 1 (323) are fixedly connected to the outer side of the chassis (321), and the chassis (321) is provided with limit slots (324) the same number as the limit blocks 1 (323), each of the limit blocks 1 (323) is slidably connected to the inner wall of the liquid circulation channel (2), a shell (325) is fixedly connected to the opposite side of the top of each limit block 1 (323), and a baffle (326) is fixedly connected to the bottom of the shell (325) between the limit blocks 1 (323), and the material of the baffle (326) is memory metal.

7. The device for clearing and unblocking oil and gas well formations by discharge-type plasma shock waves as claimed in claim 6, characterized in that: An electric telescopic rod (3261) is fixedly connected to the inner wall of the liquid circulation channel (2), and the output end of the electric telescopic rod (3261) is fixedly connected to a connecting block 1 (3262). A sleeve (3263) is slidably connected to the energy storage hollow tube (31), and the sleeve (3263) passes through the top of the shell (325) and is fixedly connected to the connecting block 1 (3262). The sleeve (3263) is fixedly connected to a plurality of connecting blocks 2 (3264) in the inner part of the shell (325), and the connecting blocks 2 (3264) are connected to the limiting groove. (324) correspond one to one, and each of the upper and lower ends of the connecting block two (3264) is rotatably connected to a connecting rod group (3265), and the end of the connecting rod group (3265) away from the connecting block two (3264) is rotatably connected to the limiting block two (3266), and the limiting block two (3266) is slidably connected in the limiting groove (324), and the end of the limiting block two (3266) away from the connecting rod group (3265) is fixedly connected to the limiting block three (3267), and the limiting block three (3267) is arc-shaped and is located between the limiting blocks one (323).

8. The device for clearing and unblocking oil and gas well formations by discharge-type plasma shock waves as claimed in claim 1, characterized in that: The first electrode ring group 1 (41) and the first electrode ring group 2 (42) are both composed of a plurality of electrode modules (411), and the electrode modules (411) in the first electrode ring group 1 (41) and the first electrode ring group 2 (42) are arranged alternately. The second electrode ring group 1 (61) and the second electrode ring group 2 (62) are both composed of a plurality of electrode modules (411), and the combination method is the same as the combination method of the first electrode ring group 1 (41) and the first electrode ring group 2 (42).

Images