Directional carbon dioxide fracturing device

Abstract

The invention discloses a directional carbon dioxide fracturing device which comprises a plurality of fracturing device units, the fracturing device units can be sequentially connected end to end, every two adjacent fracturing device units are connected through a connecting and filling wiring set, and each connecting and filling wiring set comprises a first connector and a second connector; filling wiring channels are formed in the centers of the end filling connector lug, the first connector and the second connector, positive electrode tubes and negative electrode tubes are arranged in the filling wiring channels, and a center channel of each positive electrode tube is a liquid filling channel; each fracturing device unit comprises two liquid storage pipes and an energy release head, a liquid storage cavity is formed in each liquid storage pipe, an excitation pipe is arranged in each liquid storage cavity, the two excitation pipes are electrically connected through a first connecting wire and a second connecting wire, the first connecting wire and the second connecting wire penetrate through the energy release head, and rupture disks are arranged at the two ends of the energy release head. Two energy release air inlet channels and an energy release air outlet channel are arranged in the energy release head. The circuit is simple and is not easy to damage.

Description

Technical Field

[0001] The invention relates to the technical field of carbon dioxide fracturing devices, and in particular to a directional carbon dioxide fracturing device. Background Art

[0002] At present, carbon dioxide fracturing devices have some problems in application, such as high cost and inconvenient operation. However, as a beneficial supplement to explosives, they have unique advantages in underground coal seam gas extraction, precious stone processing, geological exploration, clearing blockages and silt removal, and other situations where explosives cannot be used for blasting. With the continuous improvement and optimization of equipment, and the advancement of new materials and new processes, carbon dioxide fracturing devices will surely play an important role.

[0003] In the process of open-pit limestone mining and underground coal mining, special operations are often required, such as permeability enhancement, tunneling, coal roof pressure relief, urban building demolition, gas control in high-gas mines and rock burst control. These special operations have directional requirements, and the existing directional carbon dioxide fracturing treatment devices cannot meet the needs of on-site construction.

[0004] However, in the existing carbon dioxide fracturing device, the line connection is complicated when the fracturing pipes are connected in series. In the complex environment on site, the line may be broken during connection, resulting in failure of blasting of the hole. In addition, the liquid filling hole is also set separately, with a complicated structure.

[0005] Therefore, there is an urgent need in the art for a new type of directional carbon dioxide fracturing device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a directional carbon dioxide fracturing device to solve the problems existing in the above-mentioned prior art, combine the circuit with the liquid filling hole, simplify the circuit connection, and make the circuit less prone to damage.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention discloses a directional carbon dioxide fracturing device, comprising a plurality of fracturing units. When there are more than two fracturing units, the plurality of fracturing units can be connected end to end in sequence, and two adjacent fracturing units are connected by a connecting and filling wiring group, and the connecting and filling wiring group comprises a first connecting head and a second connecting head, and the first connecting head and the second connecting head are respectively installed on adjacent surfaces of two adjacent fracturing units, and the first connecting head and the second connecting head can be detachably connected; when there is one fracturing unit, one end of the fracturing unit is provided with an end filling wiring head, and the other end of the fracturing unit is provided with a first connecting head;

[0009] The centers of the end filling terminal, the first connector, and the second connector are all provided with a filling wiring channel, a positive tube and a negative tube are provided in the filling wiring channel, the positive tube is arranged on the inner side of the negative tube, an insulating layer is provided between the positive tube and the negative tube, and the central channel of the positive tube is a liquid filling channel;

[0010] The fracturing device unit includes two liquid storage tubes and an energy drain head, the two liquid storage tubes are respectively connected to the two ends of the energy drain head, each of the liquid storage tubes is provided with a liquid storage cavity, an excitation tube is provided in the liquid storage cavity, the two excitation tubes are electrically connected through a first connecting wire and a second connecting wire, the first connecting wire and the second connecting wire pass through the energy drain head, the positive tube and the negative tube are both electrically connected to the excitation tube, bursting pieces are provided at both ends of the energy drain head, and two energy drain air inlet channels and one energy drain air outlet channel are also provided in the energy drain head, and the two energy drain air inlet channels are both connected to the energy drain air outlet channel.

[0011] Preferably, the insulating layer is made of plastic.

[0012] Preferably, the end filling terminal, the first connecting head and the second connecting head are all threadedly connected with a switch bolt, and the switch bolt can block the liquid filling channel.

[0013] Preferably, the end filling terminal, the first connector and the second connector are all electrically connected to the excitation tube via a spring assembly, and the first connector and the second connector are also electrically connected via the spring assembly;

[0014] The spring assembly comprises an outer torsion spring and an inner torsion spring, one end of the outer torsion spring is connected to the excitation tube, the other end of the outer torsion spring is sleeved on the outside of the negative electrode tube, one end of the inner torsion spring is connected to the excitation tube, and the other end of the inner torsion spring is inserted into the central channel of the positive electrode tube;

[0015] The positive tube of the first connector is connected to the positive tube of the second connector via the inner torsion spring, and the negative tube of the first connector is connected to the negative tube of the second connector via the outer torsion spring.

[0016] Preferably, the diameter of the liquid filling channel and the inner diameter of the positive electrode tube are both 3 mm, and the outer diameter of the negative electrode tube and the inner diameter of the filling wiring channel are both 4 mm.

[0017] Preferably, a positioning ring is provided on the outer side of the excitation tube, and a plurality of liquid holes are provided on the circumferential direction of the positioning ring.

[0018] Preferably, the corner between the energy release air inlet channel and the energy release air outlet channel is set as an arc corner.

[0019] Preferably, two annular wire accommodating grooves are provided on one side of the liquid storage tube close to the energy drain head.

[0020] Preferably, both ends of the energy drain head are provided with a mounting groove, a shear protection gasket is installed at the bottom of the mounting groove, and the bursting disc is placed on the side of the shear protection gasket away from the bottom of the mounting groove.

[0021] Preferably, an insulating gasket is provided on the outer ring of the bursting disc.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The present invention combines the liquid filling hole with the wiring hole, simplifies the specific structure of the end filling terminal, the first connector and the second connector, enhances their durability and improves the impact resistance.

[0024] Furthermore, the present invention designs a new energy-dissipating head, which improves the smoothness of the phase-change gas flow, reduces the energy damage during gas flow, and reduces the impact damage to the energy-dissipating head. At the same time, the two liquid storage tubes are combined into one system, reducing one energy-dissipating head and its connecting device, and improving the utilization efficiency of the device.

[0025] Furthermore, the present invention designs a new fracturing pipe line connection device, which adopts a flexible torsion spring connection. Compared with the traditional pin-type connection, it eliminates the breakage of the pin due to transportation, filling, and connection, reduces the probability of accidents when installing the fracturing pipe, and greatly improves the connection and installation efficiency.

[0026] Furthermore, the connection between the blasting piece and the energy release head was improved, and a shear protection gasket was added to the energy release head to reduce the damage to the energy release head caused by the phase change airflow during the blasting process. This solved the problem that the tube wall of the shear blasting piece of the original energy release head was often worn away after repeated use, which made it impossible for the blasting piece to quickly complete the shear damage during blasting, resulting in blasting failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1A schematic diagram of the structure of a directional carbon dioxide fracturing device according to an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the structure of the end filling terminal in the directional carbon dioxide fracturing device according to an embodiment of the present invention;

[0030] Figure 3 A side view of an end filling terminal in a carbon dioxide fracturing device oriented to an embodiment of the present invention;

[0031] Figure 4 A front cross-sectional view of an end filling terminal in a carbon dioxide fracturing device oriented to an embodiment of the present invention;

[0032] Figure 5 A schematic diagram of the structure of a liquid storage pipe in a directional carbon dioxide fracturing device according to an embodiment of the present invention;

[0033] Figure 6 A front cross-sectional view of a liquid storage tube in a carbon dioxide fracturing device oriented according to an embodiment of the present invention;

[0034] Figure 7 A schematic diagram of the structure of an energy release head in a directional carbon dioxide fracturing device according to an embodiment of the present invention;

[0035] Figure 8 A front cross-sectional view of an energy venting head in a carbon dioxide fracturing device oriented according to an embodiment of the present invention;

[0036] Fig. 9 A schematic diagram of the installation of a shear protection gasket in a directional carbon dioxide fracturing device according to an embodiment of the present invention;

[0037] Fig.10 A schematic diagram of the structure of the connection and filling wiring group in the directional carbon dioxide fracturing device according to an embodiment of the present invention;

[0038] Fig.11 A schematic diagram of the disassembly of the connection and filling wiring group in the carbon dioxide fracturing device according to the embodiment of the present invention;

[0039] Fig.12 A front cross-sectional view of a connection and charging wiring group in a carbon dioxide fracturing device oriented to an embodiment of the present invention;

[0040] In the figure: 1-end filling terminal; 101-liquid filling channel; 102-positive tube; 103-negative tube; 104-insulating layer; 105-switch bolt; 2-liquid storage tube; 201-excitation tube; 202-positioning ring; 203-liquid storage chamber; 3-energy discharge head; 301-energy discharge air inlet channel; 302-energy discharge air outlet channel; 303-shear protection gasket; 304-positioning arm; 305-positioning hole; 4-connecting and filling terminal group; 401-first connector; 402-second connector; 403-outer ring torsion spring; 404-inner ring torsion spring; 5-first connecting wire; 6-second connecting wire. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The purpose of the present invention is to provide a directional carbon dioxide fracturing device to solve the problems existing in the above-mentioned prior art, combine the circuit with the liquid filling hole, simplify the circuit connection, and make the circuit less prone to damage.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] like Figure 1-Figure 12 As shown, this embodiment provides a directional carbon dioxide fracturing device, including a plurality of fracturing units, and the fracturing units can be provided with one, two or more according to actual needs. When there are more than two (including two) fracturing units, the plurality of fracturing units can be connected end to end in sequence, and two adjacent fracturing units are connected by connecting and filling wiring group 4, and the connecting and filling wiring group 4 includes a first connector 401 and a second connector 402, and the first connector 401 and the second connector 402 are respectively threadedly mounted on adjacent surfaces of two adjacent fracturing units, and the first connector 401 and the second connector 402 can be detachably connected by threads, and the ends of the fracturing units at both ends away from the adjacent fracturing units are respectively connected with the end filling wiring head 1 and the first connector 401. When there is one fracturing unit, one end of the fracturing unit is provided with the end filling wiring head 1, and the other end of the fracturing unit is provided with the first connector 401.

[0045] The center of the end filling terminal 1, the first connector 401 and the second connector 402 are all provided with a filling wiring channel, and the filling wiring channels in the center of the end filling terminal 1, the first connector 401 and the second connector 402 are coaxially arranged. A positive tube 102 and a negative tube 103 are arranged in the filling wiring channel. The positive tube 102 and the negative tube 103 are both conductive steel tubes or iron tubes. The positive tube 102 is coaxially arranged on the inner side of the negative tube 103. An insulating layer 104 is provided between the positive tube 102 and the negative tube 103. The insulating layer 104 is used to isolate the positive tube 102 from the negative tube 103. The central channel of the positive tube 102 is a liquid filling channel 101, and liquid carbon dioxide is transported into the liquid storage tube 2 through the liquid filling channel 101.

[0046] The fracturing device unit includes two liquid storage tubes 2 and an energy-draining head 3. The two liquid storage tubes 2 are connected to the two ends of the energy-draining head 3, respectively. Each liquid storage tube 2 is provided with a liquid storage cavity 203, and the liquid storage cavity 203 is used to contain liquid carbon dioxide. An excitation tube 201 (i.e., a heating tube) is provided in the liquid storage cavity 203. The positive and negative electrodes of the two excitation tubes 201 are electrically connected through a first connecting wire 5 and a second connecting wire 6. The first connecting wire 5 and the second connecting wire 6 pass through the energy-draining head 3, as shown in FIG. Figure 8 As shown, the energy drain head 3 is provided with corresponding through holes for the first connecting wire 5 and the second connecting wire 6 to pass through. In addition, the positive tube 102 and the negative tube 103 in the end filling terminal 1, the first connector 401 and the second connector 402 are electrically connected to the positive and negative electrodes in the excitation tube 201. Both ends of the energy drain head 3 are provided with bursting discs, which are clamped between the energy drain head 3 and the liquid storage tube 2. The energy drain head 3 is also provided with two energy drain air inlet channels 301 and one energy drain air outlet channel 302. The two energy drain air inlet channels 301 are respectively located on both sides of the energy drain air outlet channel 302. The two energy drain air inlet channels 301 are connected to the energy drain air outlet channel 302. One end of the energy drain air outlet channel 302 extends to the surface of the energy drain head 3, which is the air outlet (also called the energy drain port).

[0047] In actual use, first assemble each fracturing device unit, wherein the excitation tube 201 needs to be electrically connected to the positive tube 102 and the negative tube 103 in the end filling terminal 1, and the liquid storage tube 2 is connected to the end filling terminal 1 by the threaded rotation of the two. At the same time, another excitation tube 201 is threadedly connected to the first connector 401, and the excitation tube 201 is also electrically connected to the positive tube 102 and the negative tube 103 in the first connector 401. Finally, the two liquid storage tubes 2 are connected to the single energy discharge head 3 by the threaded rotation of the two. In this way, the assembly of a fracturing device unit is completed, and then liquid carbon dioxide is filled through the liquid filling channel 101 of the end filling terminal 1, and then the series assembly is completed near the borehole, and the borehole is placed to complete the blasthole blocking. Finally, the excitation tube 201 heats the liquid carbon dioxide, so that the liquid carbon dioxide is heated and gasified, and the gaseous carbon dioxide breaks through the bursting disc, and enters the borehole through the energy discharge inlet channel 301 and the energy discharge outlet channel 302 to complete the blasting.

[0048] In this embodiment, the insulating layer 104 can be made of plastic material to isolate the positive electrode tube 102 from the negative electrode tube 103 .

[0049] In this embodiment, a switch bolt 105 is threadedly connected to the end filling connection head 1, the first connection head 401 and the second connection head 402. The switch bolt 105 is vertically arranged with the filling connection channel, and the switch bolt 105 can block the liquid filling channel 101. The staff can control the flow of each liquid filling channel 101 by turning the switch bolt 105.

[0050] In this embodiment, the end filling terminal 1, the first connector 401 and the second connector 402 are all electrically connected to the positive and negative electrodes of the excitation tube 201 through the spring assembly. In addition, the first connector 401 and the second connector 402 are also electrically connected through the spring assembly.

[0051] As for the specific structure of the spring assembly, the spring assembly includes an outer ring torsion spring 403 and an inner ring torsion spring 404, and the inner ring torsion spring 404 is arranged on the inner side of the outer ring torsion spring 403. When the end filling terminal 1, the first connector 401 and the second connector 402 are connected to the positive and negative electrodes of the excitation tube 201 through the spring assembly, one end of the outer ring torsion spring 403 is connected to the negative electrode of the excitation tube 201, and the other end of the outer ring torsion spring 403 is sleeved on the outside of the negative electrode tube 103, so as to realize the electrical connection between the negative electrode of the excitation tube 201 and the negative electrode tube 103. One end of the inner ring torsion spring 404 is connected to the positive electrode of the excitation tube 201, and the other end of the inner ring torsion spring 404 is inserted into the central channel of the positive electrode tube 102, so as to realize the electrical connection between the positive electrode of the excitation tube 201 and the positive electrode tube 102.

[0052] The first connector 401 and the second connector 402 are fixed by threaded connection. In order to achieve electrical connection between the first connector 401 and the second connector 402, the positive tube 102 of the first connector 401 is connected to the positive tube 102 of the second connector 402 via an inner ring torsion spring 404, and the negative tube 103 of the first connector 401 is connected to the negative tube 103 of the second connector 402 via an outer ring torsion spring 403. The positive and negative poles connection between the first connector 401 and the second connector 402 is achieved via the inner ring torsion spring 404 and the outer ring torsion spring 403.

[0053] Compared with the traditional pin-type connection, the flexible spring is used for connection, which eliminates the pin breakage caused by transportation, filling and connection, reduces the probability of accidents when installing cracked pipes, and greatly improves the connection and installation efficiency.

[0054] In this embodiment, the diameter of the liquid filling channel 101 is the same as the inner diameter of the positive electrode tube 102 and is 3 mm, and the outer diameter of the negative electrode tube 103 is the same as the inner diameter of the filling wiring channel and is 4 mm. Figure 4 As shown, a 6mm groove is provided on the left side of the end filling terminal 1 to facilitate its connection with related equipment. Of course, those skilled in the art can also adjust the specific size of each channel according to actual needs, and are not limited to this one.

[0055] In this embodiment, if Figure 6 As shown, a positioning ring 202 is provided on the outer side of the excitation tube 201, and the positioning ring 202 is a self-contained part in the production process of the excitation tube 201. A plurality of liquid holes are provided in the circumferential direction of the positioning ring 202 to facilitate the passage of the filled liquid.

[0056] In this embodiment, the energy release head 3 is the place where the carbon dioxide gas expands and releases after the phase change, and is also a device for controlling the direction of energy release and rock breaking. The characteristic of the energy release head 3 is that the carbon dioxide gas expansion and release after the phase change of the two liquid storage tubes 2 share a gas outlet to improve the rock breaking efficiency.

[0057] like Figure 8 As shown, the corner between the energy release inlet channel 301 and the energy release outlet channel 302 is set as a circular arc corner, and the traditional right-angle corner improves the smoothness of the phase change gas flow, reduces the energy damage during gas flow, and reduces the impact damage to the energy release head 3.

[0058] In this embodiment, two annular wire accommodating grooves are provided on one side of the liquid storage tube 2 close to the energy drain head 3, and the first connecting wire 5 passes through the wire accommodating groove located on the outer side, and the second connecting wire 6 passes through the wire accommodating groove located on the inner side. The reason for such a configuration is that when the liquid storage tube 2 and the energy drain head 3 are threadedly connected, the first connecting wire 5 and the second connecting wire 6 will also rotate accordingly, and the wire accommodating groove can provide the first connecting wire 5 and the second connecting wire 6 with space for movement, thereby preventing them from getting entangled and affecting the threaded connection between the liquid storage tube 2 and the energy drain head 3.

[0059] In this embodiment, if Fig. 9 As shown, both ends of the energy venting head 3 are provided with a mounting groove, and a shear protection gasket 303 is installed at the bottom of the mounting groove. A positioning arm 304 is provided on both sides of the shear protection gasket 303, and a corresponding groove for the positioning arm 304 is provided on the mounting groove. A positioning hole 305 is provided on both sides of the shear protection gasket 303, and a positioning protrusion is provided on both sides of the mounting groove. The shear protection gasket 303 is fixed by inserting the positioning protrusion into the positioning hole 305. A bursting disc is placed on the side of the shear protection gasket 303 away from the bottom of the mounting groove. The bursting disc is a carbon dioxide explosion to ensure the pressure in the liquid storage tube 2, and is a shear destruction object of the phase change gas. A central through hole is provided in the center of the shear protection gasket 303, and the diameter of the bursting disc is larger than the diameter of the central through hole of the shear protection gasket 303. The shear protection gasket 303 is used to reduce the wear of the energy venting head 3 when the bursting disc is sheared during the blasting process. (In actual projects, the energy venting head 3 often fails to shear the bursting disc due to the wear of the energy venting head 3 when the bursting disc is sheared, resulting in the failure of the blasting.) The shear protection gasket 303 has an economic advantage as a convenient replacement part.

[0060] In this embodiment, an insulating washer is provided on the outer ring of the bursting disc, and the insulating washer is made of rubber material to play an insulating role, thereby isolating the bursting disc from the energy release head 3. At the same time, the outer wall of the insulating washer abuts against the inner wall of the end groove of the energy release head 3, thereby realizing the center alignment of the bursting disc.

[0061] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A directional carbon dioxide fracturing device, characterized in that: The invention comprises a plurality of fracturing device units. When there are more than two fracturing device units, the plurality of fracturing device units can be connected end to end in sequence. Two adjacent fracturing device units are connected by a connecting and filling wiring group. The connecting and filling wiring group comprises a first connecting head and a second connecting head. The first connecting head and the second connecting head are respectively installed on adjacent surfaces of two adjacent fracturing device units. The first connecting head and the second connecting head can be detachably connected. When there is only one fracturing device unit, one end of the fracturing device unit is provided with an end filling wiring head, and the other end of the fracturing device unit is provided with a first connecting head. The centers of the end filling terminal, the first connector, and the second connector are all provided with a filling wiring channel, a positive tube and a negative tube are provided in the filling wiring channel, the positive tube is arranged on the inner side of the negative tube, an insulating layer is provided between the positive tube and the negative tube, and the central channel of the positive tube is a liquid filling channel; The fracturing device unit includes two liquid storage tubes and an energy drain head, the two liquid storage tubes are respectively connected to the two ends of the energy drain head, each of the liquid storage tubes is provided with a liquid storage cavity, an excitation tube is provided in the liquid storage cavity, the two excitation tubes are electrically connected through a first connecting wire and a second connecting wire, the first connecting wire and the second connecting wire pass through the energy drain head, the positive tube and the negative tube are both electrically connected to the excitation tube, bursting pieces are provided at both ends of the energy drain head, and two energy drain air inlet channels and one energy drain air outlet channel are also provided in the energy drain head, and the two energy drain air inlet channels are both connected to the energy drain air outlet channel.

2. The directional carbon dioxide fracturing device according to claim 1, characterized in that: The insulating layer is made of plastic.

3. The directional carbon dioxide fracturing device according to claim 1, characterized in that: The end filling terminal, the first connection terminal and the second connection terminal are all threadedly connected with a switch bolt, and the switch bolt can block the liquid filling channel.

4. The directional carbon dioxide fracturing device according to claim 1, characterized in that: The end filling terminal, the first connector and the second connector are all electrically connected to the excitation tube via a spring assembly, and the first connector and the second connector are also electrically connected via the spring assembly; The spring assembly comprises an outer torsion spring and an inner torsion spring, one end of the outer torsion spring is connected to the excitation tube, the other end of the outer torsion spring is sleeved on the outside of the negative electrode tube, one end of the inner torsion spring is connected to the excitation tube, and the other end of the inner torsion spring is inserted into the central channel of the positive electrode tube; The positive tube of the first connector is connected to the positive tube of the second connector via the inner torsion spring, and the negative tube of the first connector is connected to the negative tube of the second connector via the outer torsion spring.

5. The directional carbon dioxide fracturing device according to claim 1, characterized in that: The diameter of the liquid filling channel and the inner diameter of the positive electrode tube are both 3 mm, and the outer diameter of the negative electrode tube and the inner diameter of the filling wiring channel are both 4 mm.

6. The directional carbon dioxide fracturing device according to claim 1, characterized in that: A positioning ring is arranged on the outer side of the excitation tube, and a plurality of liquid holes are arranged in the circumferential direction of the positioning ring.

7. The directional carbon dioxide fracturing device according to claim 1, characterized in that: The corner between the energy release air inlet channel and the energy release air outlet channel is set as a circular arc corner.

8. The directional carbon dioxide fracturing device according to claim 1, characterized in that: Two annular wire accommodating grooves are arranged on one side of the liquid storage tube close to the energy dissipation head.

9. The directional carbon dioxide fracturing device according to claim 1, characterized in that: Both ends of the energy-draining head are provided with a mounting groove, the groove bottom of the mounting groove is provided with a shear protection gasket, and the bursting disc is placed on the side of the shear protection gasket away from the groove bottom of the mounting groove.

10. The directional carbon dioxide fracturing device according to claim 1, characterized in that: The outer ring of the bursting disc is provided with an insulating gasket.

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