An underwater fracturing system based on wireless communication

Abstract

The present invention relates to the technical field of underwater blasting of ocean engineering equipment, and particularly relates to an underwater fracturing system based on wireless communication, which includes a fracturing device, a conversion buoy and a wireless starting device; the fracturing device includes a first antenna, an ultrasonic receiver, a first controller, a blasting control switch and a socket arranged in the cavity of the upper plug cover; the firing tube is connected to the socket through the blasting control switch. The first antenna, the ultrasonic receiver and the first controller are connected in sequence, and the first controller is connected to the blasting control switch. The conversion buoy includes a second antenna, a wireless receiving module, a second controller, an ultrasonic transmitting module and a third antenna, and the second antenna, the wireless receiving module and the second controller are connected in sequence, and the second controller, the ultrasonic transmitting module and the third antenna are connected in sequence. By means of air wireless communication combined with underwater ultrasonic communication, the detonation signal can be successfully transmitted to the fracturing device to complete the detonation operation. This method eliminates the traditional wired control mode and is more suitable for underwater blasting operations.

Description

Technical Field

[0001] The present invention belongs to the technical field of underwater rock-breaking blasting, and particularly relates to an underwater fracturing system based on wireless communication. Background Art

[0002] In the existing rock-breaking blasting system, when performing blasting construction operations, drill holes at the place to be blasted, place the fracturing tube filled with liquid gas in the holes, wire the placed fracturing tubes, then embed the fracturing tubes, and finally start through a detonator. The high-pressure gas is quickly released after the fracturing tube to achieve the purpose of breaking rocks or falling coal. For example, the patent document with the application number 2018106917262 discloses a process method for fracturing rocks using a fracturing tube, discloses the specific method for fracturing rocks with a fracturing tube, and discloses the connection method of multiple fracturing tubes. Specifically, the upper part of the fracturing tube is also provided with a positive lead wire and a negative lead wire connected to the heating tube. The end of the positive lead wire away from the fracturing tube is the positive wiring terminal, and the end of the negative lead wire away from the fracturing tube is the negative wiring terminal; both the positive wiring terminal and the negative wiring terminal extend upward out of the fracturing bottom hole; and the positive wiring terminal and the negative wiring terminal are respectively connected to the positive electrode of the activator and the negative electrode of the activator. The liquid gas in the fracturing tube is heated and vaporized and expanded by the activator, and then high-pressure gas is released to achieve rock fracturing.

[0003] Therefore, although wiring can be better completed during land blasting and started through an activator, during underwater blasting operations, due to the obstruction of water underwater, when connecting and wiring an underwater fracturing device, the activator is arranged on the shore or on a ship far from the water area of the fracturing device, so that the lead wire of the activator needs to pass through the water layer to connect the fracturing device. If the water flow surges greatly, it is easy to cause the lead wire of the activator to be pulled, and it is easy to cause the connection to become loose, resulting in the phenomenon of blasting failure. Summary of the Invention

[0004] The purpose of the present invention is to provide an underwater fracturing system based on wireless communication, so as to overcome the defect that the blasting fails due to the loosening of the connection between the lead wire of the activator and the fracturing device caused by pulling.

[0005] To achieve the above purpose, the present invention provides an underwater fracturing system based on wireless communication, including a fracturing device, and the fracturing device includes a fracturing tube and an excitation tube; the fracturing tube includes a tube body and an upper plug cover and a lower plug cover respectively and hermetically connected to both ends of the tube body; the excitation tube is arranged inside the fracturing tube; and it further includes a conversion buoy and a wireless starting device;

[0006] The upper plug cover is provided with a cavity, and the fracturing device further includes a first antenna, an ultrasonic receiver, a first controller, a blasting control switch and a socket arranged in the cavity; the receiving end of the first antenna and the plugging end of the socket extend out of the cavity; the detonating wire of the firing tube is connected to the socket through the blasting control switch; the first antenna, the ultrasonic receiver and the first controller are connected in sequence, and the first controller is connected to the control end of the blasting control switch;

[0007] The conversion buoy includes a second antenna, a wireless receiving module, a second controller, an ultrasonic transmitting module and a third antenna. The second antenna, the wireless receiving module and the second controller are connected in sequence, and the second controller, the ultrasonic transmitting module and the third antenna are connected in sequence;

[0008] The wireless starting device includes a start button, a wireless transmitting module, a third controller and a fourth antenna. The start button, the third controller, the wireless transmitting module and the fourth antenna are connected in sequence.

[0009] Preferably, in the above technical solution, a waterproof mobile power supply is further included, and the waterproof mobile power supply is hermetically connected to the plugging end of the socket through a plug.

[0010] Preferably, in the above technical solution, the cavity includes a first sub-cavity and a second sub-cavity. The first antenna is located in the first sub-cavity, and the ultrasonic receiver, the first controller, the blasting control switch and the socket are located in the second sub-cavity. A slot is provided on the side of the upper plug cover, and the plugging end of the socket extends into the slot.

[0011] Preferably, in the above technical solution, a first sealing ring and a second sealing ring are further included. The upper plug cover and the lower plug cover are respectively provided with a boss and a threaded cap head connected in sequence; both ends of the tube body are respectively provided with a first sub-tube section, a second sub-tube section and a third sub-tube section in sequence. The inner diameter of the first sub-tube section is larger than that of the second sub-tube section and the third sub-tube section, and the second sub-tube section is provided with an internal thread; the first sealing ring and the second sealing ring are respectively arranged in the first sub-tube section and the third sub-tube section, and the upper plug cover and the lower plug cover are respectively assembled to both ends of the tube body through threads.

[0012] Preferably, in the above technical solution, the conversion buoy includes a body; an accommodation cavity is arranged inside the body, a floating body is arranged at the bottom of the body, the second antenna, the wireless receiving module, the second controller, the ultrasonic transmitting module and the third antenna are arranged in the accommodation cavity, there are two third antennas, the second antenna extends above the body, and the two third antennas extend below the body.

[0013] Preferably, in the above technical solution, the wireless transmitting module is wirelessly connected to the wireless receiving module by means of 4G or GPRS.

[0014] Preferably, in the above technical solution, the inflation valve is installed on the lower plug cover.

[0015] Preferably, in the above technical solution, the inflation valve is a one-way inflation valve.

[0016] Compared with the existing technologies, the present invention has the following beneficial effects:

[0017] 1. In the underwater fracturing system based on wireless communication of the present invention, there is no need to wire between the fracturer and the initiator. When blasting, first start the wireless starting device to transmit a wireless communication signal to the conversion buoy. After receiving the signal, the conversion buoy converts it into an ultrasonic signal and wirelessly sends it to the starting blasting control switch of the fracturer, thereby controlling the fracturer to conduct blasting. By means of combining wireless communication in the air with underwater ultrasonic communication, wireless communication is suitable for air propagation, and ultrasonic waves are suitable for underwater propagation, enabling the detonation signal to be successfully transmitted to the fracturer to complete the detonation operation. This method avoids the defects of the traditional wired mode and is more suitable for underwater blasting operations.

[0018] 2. The waterproof mobile power supply adopted by the present invention can be directly arranged at the bottom of the water together when wiring, which can prevent the influence of water flow surging. At the same time, it is connected by plugging, which is more convenient and fast. And after connection, waterproof glue is filled in the slot at the connection to prevent the problem of short circuit at the connection.

[0019] 3. In the present invention, a double-layer sealing ring is provided between the pipe body of the fracturing pipe and the upper and lower plug covers, which has a good sealing and waterproof effect. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the fracturer of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the conversion buoy of the present invention.

[0022] Figure 3 It is a schematic circuit diagram of the fracturer of the present invention.

[0023] Figure 4 It is a schematic circuit diagram of the conversion buoy of the present invention.

[0024] Figure 5 It is a schematic circuit diagram of the wireless starting device of the present invention.

[0025] Figure 6 It is an installation schematic diagram of the underwater fracturing system of the present invention.

[0026] Among them, 1 - fracturing device, 2 - pipe body, 3 - fracturing groove, 4 - upper plug cover, 5 - first sub - cavity, 6 - second sub - cavity, 7 - slot, 8 - first antenna, 9 - ultrasonic receiver, 10 - first controller, 11 - blasting control switch, 12 - socket, 13 - first sealing ring, 14 - second sealing ring, 15 - excitation tube placement cavity, 16 - excitation tube, 17 - lower plug cover, 18 - conversion float, 19 - body, 20 - floating body, 21 - second antenna, 22 - third antenna. Specific implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse"

[0029] "upper", "lower", "front", "thick", "left", "right", "vertical", "horizontal", "top", "bottom"

[0030] The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0031] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding" do not include the present number, and understandings such as "above", "below", "within" include the present number. If there are descriptions of the terms "first", "second", "third", they are only for descriptive purposes and to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes the embodiments according to the overall structure of the present invention.

[0033] As Figures 1-6 shown, the underwater fracturing system based on wireless communication in this embodiment includes a fracturer 1, a conversion buoy 18, a wireless starting device, and a waterproof mobile power source. The fracturer 1 includes a fracturing pipe and an excitation pipe 16. The fracturing pipe includes a pipe body 2, an upper plug 4 and a lower plug 17 respectively and hermetically connected to both ends of the pipe body 2, and the excitation pipe 16 is arranged inside the fracturing pipe. Specifically, the fracturing pipe includes a pipe body 2, an upper plug 4, a lower plug 17, an excitation pipe placement cavity 15, and a fracture groove 3. The upper plug 4 is provided with a lifting lug. The pipe wall of the pipe body 2 is provided with a fracture groove 3. The inside of the pipe body 2 is a gas containment cavity. The pipe orifice of the excitation pipe placement cavity 15 is hermetically connected to the upper plug 4, and a pipeline communicating with the excitation pipe placement cavity 15 is arranged inside the upper plug 4. The excitation pipe 16 is placed in the excitation pipe placement cavity 15, and its lead extends into the pipeline. An inflation valve is installed on the lower plug 17 of the fracturing pipe. In this embodiment, the inflation valve is preferably a one-way inflation valve.

[0034] In this embodiment, referring to Figure 1 , in order to make the fracturer 1 have good sealing performance, a first sealing ring 13 and a second sealing ring 14 are introduced. The upper plug 4 and the lower plug 17 are respectively provided with a boss and a threaded cap head connected in sequence. The two ends of the pipe body 2 are respectively provided with a first sub-pipe section, a second sub-pipe section, and a third sub-pipe section in sequence. The inner diameter of the first sub-pipe section is larger than that of the second sub-pipe section and the third sub-pipe section, and the second sub-pipe section is provided with an internal thread. The first sealing ring 13 and the second sealing ring 14 are respectively arranged inside the first sub-pipe section and the third sub-pipe section. The upper plug 4 and the lower plug 17 are respectively assembled to both ends of the pipe body 2 through threads. So as to have a double-layer sealing effect between the fracturing pipe body and the plug.

[0035] Continue to refer to Figure 1 and Figure 3, the upper plug cover 4 is provided with a cavity, and a slot 7 is provided on the side of the upper plug cover 1. The slot opening of the slot 7 is in an open state. In this embodiment, preferably, the cavity includes a first sub-cavity 5 and a second sub-cavity 6. The fracturer 1 further includes a first antenna 8, an ultrasonic receiver 9, a first controller 10, an explosion initiation control switch 11 and a socket 12 disposed in the cavity. The first antenna 8 is located in the first sub-cavity 5, and the ultrasonic receiver 9, the first controller 10, the explosion initiation control switch 11 and the socket 12 are located in the second sub-cavity 6. The receiving end of the first antenna 8 extends out of the first sub-cavity 5. Separating the first antenna 8 from other components can reduce the influence of signal interference received by the first antenna 8 on other electronic devices, and at the same time improve the sealing performance of other components. The plugging end of the socket 12 passes through the cavity and extends into the slot 7. The detonation wire of the excitation tube 16 is connected to the socket 12 through the explosion initiation control switch 11. The first antenna 8, the ultrasonic receiver 9 and the first controller 10 are connected in sequence, and the first controller 10 is connected to the control end of the explosion initiation control switch 11. During operation, after the first antenna 8 receives an ultrasonic signal, it is transmitted to the ultrasonic receiver 9. The ultrasonic receiver 9 converts the ultrasonic signal and then sends it to the first controller 10. The first controller 10 controls the explosion initiation control switch 11 to close, so as to perform blasting operations. It should be noted that a power supply connected to the first controller 10 is also provided in the second sub-cavity 6 to provide power support for related components, which will not be elaborated here.

[0036] When configuring the fracturer 1, the waterproof mobile power supply is hermetically connected to the plugging end of the socket 12 through a plug. The waterproof mobile power supply can sink to the bottom of the water together with the fracturer 1, which can reduce the amount of lead wires of the waterproof mobile power supply and also weaken the pulling force of the underwater water flow on the lead wires. After the plug of the waterproof mobile power supply is inserted into the plugging end of the socket, waterproof glue can be filled for waterproofing.

[0037] Continue to refer to Figure 2 and Figure 4, the conversion buoy 18 includes a second antenna 21, a wireless receiving module 24, a second controller 23, an ultrasonic transmitting module 25, and a third antenna 22. The second antenna 21, the wireless receiving module 24, and the second controller 23 are connected in sequence, and the second controller 23, the ultrasonic transmitting module 25, and the third antenna 22 are connected in sequence. Specifically, the conversion buoy 18 includes a body 19. An accommodation cavity is provided inside the body 19. A floating body 20 is provided at the bottom of the body 19 to make the conversion buoy 18 float on the water surface. The second antenna 21, the wireless receiving module 24, the second controller 23, the ultrasonic transmitting module 25, and the third antenna 22 are arranged in the accommodation cavity. There are two third antennas 22. The second antenna 21 extends above the body 19, and the two third antennas 22 extend below the body 19. During operation, the second antenna 21 receives a wireless signal and transmits it to the second controller 23. After the second controller 23 receives the signal, it controls the ultrasonic transmitting module 25 to generate an ultrasonic signal and transmit it from the third antenna 22. Similarly, a power supply connected to the second controller 23 is also provided in the accommodation cavity to provide power support for relevant components, which will not be elaborated here.

[0038] In this embodiment, referring to Figure 5 , the wireless starting device includes a start button 27, a wireless transmitting module 28, a third controller 26, a fourth antenna 29, and a power supply. The start button 27, the third controller 26, the wireless transmitting module 28, and the fourth antenna 29 are connected in sequence. The power supply is connected to the third controller 26. When the start button 27 is pressed, the third controller 26 controls the wireless transmitting module 28 to transmit a wireless signal to the wireless receiving module 24 of the conversion buoy 27. In this embodiment, the wireless transmitting module 28 can be wirelessly connected to the wireless receiving module 24 by means of 4G or GPRS, but this embodiment is not limited thereto.

[0039] When performing blasting operations, referring to Figure 6 , first, the fracturer 1 is filled with carbon dioxide through a one-way inflation valve. The nozzle of the high-pressure gas pipe is fixed to the one-way inflation valve through a fastening device, and carbon dioxide is filled into the gas storage cavity. After the carbon dioxide filling is completed, check whether the fracturing pipe leaks. After ensuring that the fracturing pipe does not leak, insert the plug of the waterproof mobile power supply into the slot 7 of the fracturer 1, and inject waterproof glue to fix the waterproofing. Install the fracturer 1 into the pre-drilled blast hole, that is, slowly lift the fracturing pipe into the blast hole by tying the lifting ear with a lifting rope. After ensuring that it is installed to the designed depth, pour the concrete prepared with quick-setting cement into the hole to form a hole mouth plug, and the first antenna 8 is exposed outside the hole during installation. Prevent the blasting energy from leaking and ensure the rock-breaking effect, thus completing the installation of the fracturer 1 in one blast hole. Repeat the above steps to complete the installation of the fracturer 1 in other blast holes, and then place the conversion buoy 18 at the center of the layout range. The conversion buoy 18 can be limited by a wire rope. After preparation, the rock can be blasted.

[0040] After the installation of the cracking tube is completed, press the start button 27, and the third controller 26 controls the wireless transmission module 28 to transmit a wireless signal to the conversion buoy 18. After the wireless receiving module 24 of the conversion buoy 18 receives the signal, the second controller 23 controls the ultrasonic transmitting module 25 to transmit an ultrasonic signal to the cracker 1. After the ultrasonic receiver 9 of the cracker 1 receives the signal, the first controller 10 controls the blasting control switch 11 to close and activate the initiation tube 16, generating high temperature, causing the liquid carbon dioxide filled in the gas containment cavity of the cracking tube to instantly vaporize, with the volume instantly increasing by hundreds of times, breaking the nearby rock mass.

[0041] In summary, in this embodiment, there is no need to wire between the cracker and the initiator. During blasting, first start the wireless starting device to transmit a wireless communication signal to the conversion buoy. After the conversion buoy receives the signal, it is converted into an ultrasonic signal and wirelessly transmitted to the starting blasting control switch of the cracker, thereby controlling the cracker to perform blasting. By means of air wireless communication combined with underwater ultrasonic communication, the initiation signal can be successfully transmitted to the cracker to complete the initiation operation. This method avoids the traditional wired mode and is more suitable for underwater blasting operations.

[0042] The foregoing description of specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the invention to the precise forms disclosed, and obviously, many changes and variations are possible in light of the above teaching. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the invention as well as various different selections and changes. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. An underwater fracturing system based on wireless communication, comprising a fracturing device, wherein the fracturing device includes a fracturing pipe and an excitation pipe; the fracturing pipe includes a pipe body and an upper plug cover and a lower plug cover respectively and hermetically connected to both ends of the pipe body; the excitation pipe is arranged inside the fracturing pipe; characterized in that, It further includes a conversion buoy and a wireless activation device; The upper plug cover is provided with a cavity. The cracker further includes a first antenna, an ultrasonic receiver, a first controller, an explosion initiation control switch, and a socket disposed in the cavity. The receiving end of the first antenna and the plugging end of the socket extend out of the cavity. The detonation wire of the excitation tube is connected to the socket through the explosion initiation control switch. The first antenna, the ultrasonic receiver, and the first controller are connected in sequence, and the first controller is connected to the control end of the explosion initiation control switch; The conversion buoy includes a second antenna, a wireless receiving module, a second controller, an ultrasonic transmitting module, and a third antenna. The second antenna, the wireless receiving module, and the second controller are connected in sequence. The second controller, the ultrasonic transmitting module, and the third antenna are connected in sequence; The wireless activation device includes a start button, a wireless transmitting module, a third controller, and a fourth antenna. The start button, the third controller, the wireless transmitting module, and the fourth antenna are connected in sequence; It further includes a waterproof mobile power supply, and the waterproof mobile power supply is hermetically connected to the plugging end of the socket through a plug; The cavity includes a first sub-cavity and a second sub-cavity. The first antenna is located in the first sub-cavity, and the ultrasonic receiver, the first controller, the explosion initiation control switch, and the socket are located in the second sub-cavity. A slot is provided on the side of the upper plug cover, and the plugging end of the socket extends into the slot; The conversion buoy includes a body. An accommodation cavity is provided inside the body, and a floating body is provided at the bottom of the body. The second antenna, the wireless receiving module, the second controller, the ultrasonic transmitting module, and the third antenna are disposed in the accommodation cavity. There are two third antennas. The second antenna extends above the body, and the two third antennas extend below the body; During blasting operations, when the start button is pressed, the third controller controls the wireless transmitting module to send a wireless signal to the conversion buoy. After the wireless receiving module of the conversion buoy receives it, the second controller controls the ultrasonic transmitting module to send an ultrasonic signal to the cracker. After the ultrasonic receiver of the cracker receives it, the first controller controls the explosion initiation control switch to close to activate the excitation tube.

2. The underwater fracturing system based on wireless communication according to claim 1, characterized in that It further includes a first sealing ring and a second sealing ring. The upper plug cover and the lower plug cover are respectively provided with a boss and a threaded cap head connected in sequence. The two ends of the tube body are respectively provided with a first sub-tube section, a second sub-tube section, and a third sub-tube section in sequence. The inner diameter of the first sub-tube section is larger than that of the second sub-tube section and the third sub-tube section. The second sub-tube section is provided with an internal thread. The first sealing ring and the second sealing ring are respectively disposed in the first sub-tube section and the third sub-tube section. The upper plug cover and the lower plug cover are respectively assembled to the two ends of the tube body through threads.

3. The underwater fracturing system based on wireless communication according to claim 1, wherein The wireless transmitting module is wirelessly connected to the wireless receiving module by means of 4G or GPRS.

4. The underwater fracturing system based on wireless communication according to claim 1, wherein, The inflation valve is installed on the lower plug cover.

5. The underwater fracturing system based on wireless communication according to claim 4, characterized in that, The inflation valve is a one-way inflation valve.

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