Electro-chemical composite energy pulse rock sample cracking device

Abstract

The utility model discloses an electro-chemical composite energy pulse fracturing rock sample device, which relates to a coal sample drilling experiment device and comprises a support, a simulation drilling module is arranged on the support and comprises a simulation drilling cylinder arranged upwards, the simulation drilling cylinder is filled with an energy transfer medium, and the energy transfer medium is arranged on the support. A transduction window for emitting electro-chemical composite energy pulses to a coal sample is arranged in the middle of the bottom of the simulation drilling cylinder, an energetic electrode of a metal wire and a chemical energetic material is arranged in the transduction window, and the energetic electrode is connected with an energy supply module; coal sample tanks are symmetrically arranged at the positions, corresponding to the pulse release positions of the transduction window, of the bottom of the simulation drilling barrel along the longitudinal section, coal samples are arranged in the coal sample tanks, strain gauges are attached to the surfaces of the coal samples, and the strain gauges are connected with a super-dynamic strain gauge through a strain gauge connecting line; the device can be used for testing the pulse wave characteristics of the electro-chemical composite energy pulse wave in a drill hole and the fracturing effect of the electro-chemical composite energy pulse wave on a rock sample.

Description

Technical Field

[0001] The utility model relates to a pulse fracturing test device, belonging to the technical field of coal mine and petroleum permeability enhancement and extraction. Background Technique

[0002] In the fields of coal mining and petroleum exploration, the fracturing effect of rock samples plays a crucial role in improving mining efficiency and resource recovery rate. Traditional rock sample fracturing methods, such as explosive blasting, water-chemical measures, and CO2 fracturing, although have achieved certain application effects to a certain extent, all have obvious limitations. For example, explosive blasting has greater safety risks and may cause environmental pollution; water-chemical measures and CO2 fracturing are limited by geological conditions and resource costs, and the effects are unstable. In recent years, the pulse fracturing technology based on electro-chemical composite energy has gradually attracted the attention of the industry. This technology forms an electro-chemical composite energy pulse wave by installing a metal wire and a chemical energy-containing material between the discharge electrodes, and has the technical advantages of high peak pressure, long duration, and high impulse, showing a more profound application prospect. However, at present, the pulse wave characteristics of the electro-chemical composite energy pulse wave in the borehole and the fracturing effect on rock samples are not clear, and there is a lack of corresponding experimental devices and research means. In order to accurately measure and analyze the pulse wave characteristics of the electro-chemical composite energy pulse wave in the borehole and the fracturing effect on rock samples, it is necessary to develop a special experimental device. This device needs to be able to simulate the actual borehole environment, provide a stable electro-chemical composite energy pulse source, and be able to monitor and record the fracturing process of rock samples in real time. Content of the Utility Model

[0003] The purpose of the utility model is to provide an electro-chemical composite energy pulse fracturing rock sample device to solve the problems proposed in the above background technique. Through this device, the fracturing effect of the electro-chemical composite energy pulse wave on rock samples under different parameters can be systematically studied, providing new technical support and solutions for the fields of coal mining and petroleum exploration.

[0004] To achieve the above purpose, the utility model provides the following technical solution: An electro-chemical composite energy pulse fracturing rock sample device, including a bracket, on which a simulated borehole module is arranged. The simulated borehole module includes an upwardly arranged simulated borehole cylinder. A clamping device for clamping and fixing the simulated borehole cylinder is arranged on the bracket. The simulated borehole cylinder is filled with an energy transmission medium. At the middle position of the bottom of the simulated borehole cylinder, a conversion window for sending an electro-chemical composite energy pulse to the coal sample is arranged. An energy-containing electrode with a metal wire and a chemical energy-containing material is arranged in the conversion window. The energy-containing electrode is connected to an energy supply module. Coal sample cans are symmetrically arranged along the longitudinal section at the pulse release position corresponding to the conversion window at the bottom of the simulated borehole cylinder. A coal sample is arranged in the coal sample can, and a strain gauge is attached to the surface of the coal sample. The strain gauge is connected to a super dynamic strain gauge through a strain gauge connecting wire.

[0005] In order to further optimize the utility model, the following technical solutions can be preferably used:

[0006] Preferably, the clamping device includes a first clamping plate and a second clamping plate which are symmetrically arranged, the first clamping plate being fixedly arranged on the bracket and the clamping surface being in contact with the outer wall of the simulated drilling tube, the second clamping plate being movably arranged on the bracket, and an adjusting screw being arranged on the bracket corresponding to the back of the second clamping plate, one end of the adjusting screw being rotatably connected to the second clamping plate, and the other end of the adjusting screw being arranged with an adjusting handle, the adjusting screw being rotatably arranged on the bracket, and the clamping gap of the first clamping plate and the second clamping plate being adjusted by adjusting the screw; by arranging the first clamping plate and the second clamping plate symmetrically, as well as the adjusting screw and the adjusting handle, the clamping gap of the clamping plates can be conveniently adjusted, thereby achieving stable clamping of simulated drilling tubes of different sizes. This design not only improves the versatility of the device, but also enhances the safety and stability during the experiment.

[0007] Preferably, the clamping surfaces of the first clamping plate and the second clamping plate are both V-shaped. The clamping surfaces of the first clamping plate and the second clamping plate adopt a V-shaped design, which can better fit the outer wall of the simulated drilling tube and further enhance the stability and reliability of clamping.

[0008] Preferably, a fixed support is provided at the bottom of the corresponding transducer window in the simulated drilling tube, which can ensure that the energetic electrode remains stable when emitting the electro-chemical composite energy pulse, and prevent experimental errors caused by vibration or displacement. This helps to improve the accuracy and reliability of the experiment.

[0009] Preferably, the coal sample tank and the simulated drilling tube are connected by a flange, and the flange connects the coal sample tank and the simulated drilling tube, so that the connection between the two is tighter and more stable, avoiding the loosening or falling off phenomenon that may occur during the experiment. At the same time, this connection method is also convenient for the disassembly and replacement of the coal sample tank, which improves the convenience of the experiment; the coal sample tank includes a first coal sample tank shell and a second coal sample tank shell symmetrically arranged along the longitudinal section, and the first coal sample tank shell and the second coal sample tank shell are spliced ​​to form a coal sample tank. The splicing position of the first coal sample tank shell and the second coal sample tank shell is provided with a plurality of splicing ears along the length direction. The coal sample tank is formed by splicing the first coal sample tank shell and the second coal sample tank shell symmetrically arranged along the longitudinal section. This design makes the assembly and disassembly of the coal sample tank simpler and more convenient. At the same time, multiple splicing ears are provided at the splicing position, which can further enhance the structural strength of the coal sample tank and improve its stability during the experiment. The end of the coal sample tank away from the simulated drilling tube is provided with a threading hole for threading the strain gauge connecting line. The threading hole is provided at the end of the coal sample tank away from the simulated drilling tube, which is convenient for threading and fixing the strain gauge connecting line, avoids interference and damage of the connecting line during the experiment, and improves the accuracy and reliability of the experiment.

[0010] Preferably, the power supply module includes a connected capacitor, a discharge control host, and a power transmission cable. One end of the power transmission cable is connected to the discharge control host, and the other end of the power transmission cable is connected to the energy conversion window. The electrical energy in the capacitor is released to the energy conversion window through the power transmission cable. By combining the capacitor, the discharge control host, and the power transmission cable into a power supply module, the stable supply and precise control of electrical energy are ensured. As an energy storage element, the capacitor can store a large amount of electrical energy and is precisely controlled by the discharge control host to ensure that the electrical energy is released to the energy conversion window according to the preset parameters and time sequence. This design not only improves the utilization rate of electrical energy but also enhances the reliability and repeatability of the experiment.

[0011] Preferably, the power transmission cable coaxially penetrates through the top of the simulated drilling cylinder. The top of the simulated drilling cylinder is connected to a top plate through a flange, and a through hole is provided on the top plate. The power transmission cable coaxially penetrates through the top of the simulated drilling cylinder and is connected to the top plate through a flange, ensuring the stability and safety of power transmission. By connecting the simulated drilling cylinder and the top plate through a flange, the connection between the two is made tighter and more stable. This connection method not only enhances the structural strength of the simulated drilling cylinder but also avoids possible loosening or falling off during the experiment, ensuring the smooth progress of the experiment. At the same time, the through hole provided on the top plate provides sufficient space for the cable, avoiding extrusion or damage to the cable during transmission and further improving the reliability of the experiment.

[0012] Preferably, the bracket is a square reaction frame surrounding the simulated drilling cylinder. The bracket is designed as a square reaction frame surrounding the simulated drilling cylinder, providing stable support and fixation for the simulated drilling cylinder. This design not only enhances the stability of the simulated drilling cylinder but also avoids possible shaking or tilting during the experiment, ensuring the accuracy and reliability of the experiment. At the same time, the structure of the square reaction frame is simple and compact, facilitating installation and disassembly, and improving the convenience and flexibility of the experiment.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] An electro-chemical composite energy pulse rock sample fracturing device proposed in this patent has significant beneficial effects in the fields of coal mining and oil exploration. First, through the simulated drilling module and the filled energy transmission medium, the device can highly restore the actual drilling environment, making the experimental results closer to the actual working conditions and providing more accurate reference data for coal mining and oil exploration. Second, in the energy conversion window of the device, there are energy-containing electrodes with metal wires and chemical energy-containing materials, which can generate electro-chemical composite energy pulse waves. These pulse waves have the characteristics of high peak pressure, long duration, and high impulse, and can more effectively fracture rock samples, improving the mining efficiency and resource recovery rate. Third, the coal sample tank enables the coal sample to be directly affected by the electro-chemical composite energy pulse wave. At the same time, the strain gauges attached to the surface of the coal sample can real-time monitor the deformation of the coal sample under the action of the pulse wave. By recording and analyzing data with a super dynamic strain gauge, the fracturing effect of the pulse wave on the rock sample can be deeply understood, providing a scientific basis for optimizing the mining process and parameters. In addition, the device has a simple structure, convenient operation, and high safety and stability, and can be repeatedly experimented in a laboratory environment, providing new ideas and methods for the research and application in the fields of coal mining and oil exploration. In summary, an electro-chemical composite energy pulse rock sample fracturing device proposed in this patent has significant beneficial effects in the fields of coal mining and oil exploration, can improve the mining efficiency and resource recovery rate, and provide new technical support and solutions for the research and application in related fields. Brief Description of the Drawings

[0015] Figure 1 is the front view of an electro-chemical composite energy pulse rock sample fracturing device of the present utility model;

[0016] Figure 2 is the front view of the simulated drilling cylinder;

[0017] Figure 3 is the top view of the simulated drilling cylinder;

[0018] Figure 4 is the structural schematic diagram of the coal sample tank.

[0019] In the figure: 1, support; 2, simulated drilling cylinder; 3, clamping device; 4, energy transmission medium; 5, energy conversion window; 6, coal sample tank; 7, capacitor; 8, discharge control host; 9, electric energy transmission cable; 10, roof; 11, through hole; 12, coal sample; 13, strain gauge; 14, super dynamic strain gauge; 15, first clamping plate; 16, second clamping plate; 17, adjusting screw rod; 18, adjusting handle; 19, first coal sample tank housing; 20, second coal sample tank housing; 21, splicing ear. Detailed Description of the Preferred Embodiment

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0021] Please refer to Figures 1-4 , an electro-chemical composite energy pulse rock sample fracturing device, which includes a bracket 1. A simulated drilling module is installed on the bracket. The simulated drilling module includes an upwardly arranged simulated drilling cylinder 2. A clamping device for clamping and fixing the simulated drilling cylinder is installed on the bracket. The clamping device includes symmetrically installed first clamping plates 15 and second clamping plates 16. The first clamping plate is fixedly installed on the bracket 1 and the clamping surface is attached to the outer wall of the simulated drilling cylinder. The second clamping plate is movably installed on the bracket. An adjusting lead screw 17 is installed on the bracket corresponding to the back of the second clamping plate. One end of the adjusting lead screw 17 is rotatably connected to the second clamping plate. The other end of the adjusting lead screw is installed with an adjusting handle 18. The adjusting lead screw 17 is rotatably installed on the bracket. The clamping gap between the first clamping plate and the second clamping plate is adjusted through the adjusting lead screw; by installing symmetric first clamping plates and second clamping plates, as well as the adjusting lead screw and the adjusting handle, the clamping gap of the clamping plates can be conveniently adjusted, so as to realize the stable clamping of simulated drilling cylinders of different sizes. This design not only improves the versatility of the device, but also enhances the safety and stability during the experiment; the clamping surfaces of the first clamping plate and the second clamping plate are both V-shaped. The clamping surfaces of the first clamping plate 15 and the second clamping plate 16 adopt a V-shaped design, which can better fit the outer wall of the simulated drilling cylinder, further enhancing the stability and reliability of the clamping.

[0022] The simulated drilling cylinder is filled with an energy transmission medium 4. The energy transmission medium 4 can use water or brine as the energy propagation medium. A transducer window for emitting electro-chemical composite energy pulses to the coal sample is installed at the middle position of the bottom of the simulated drilling cylinder 2. An energy-containing electrode of a metal wire and a chemical energy-containing material is installed in the transducer window. The metal wire can be an iron wire, a tungsten wire or a copper wire, and the chemical energy-containing material is an oxidant

[0023] The energetic electrode is connected to an energy supply module. A coal sample tank 6 is symmetrically installed along the longitudinal section at the position corresponding to the release pulse of the transducer window at the bottom of the simulated drilling cylinder. A coal sample 12 is installed in the coal sample tank 6, and a strain gauge 13 is attached to the surface of the coal sample. The strain gauge is connected to a super-dynamic strain gauge 14 through a strain gauge connection wire. The energy supply module includes a connected capacitor 7, a discharge control host 8, and a power transmission cable 9. One end of the power transmission cable is connected to the discharge control host, and the other end of the power transmission cable 9 is connected to the transducer window. The electrical energy in the capacitor is released to the transducer window through the power transmission cable. By combining the capacitor, the discharge control host, and the power transmission cable into an energy supply module, the stable supply and precise control of electrical energy are ensured. The capacitor, as an energy storage element, can store a large amount of electrical energy and is precisely controlled by the discharge control host to ensure that the electrical energy is released to the transducer window according to the preset parameters and time sequence. This design not only improves the utilization rate of electrical energy but also enhances the reliability and repeatability of the experiment.

[0024] As a preferred implementation, the power transmission cable 9 coaxially penetrates and installs at the top of the simulated drilling cylinder 2. The top of the simulated drilling cylinder 2 is connected to a top plate 10 through a flange. A through hole 11 is opened on the top plate. The power transmission cable coaxially penetrates the top of the simulated drilling cylinder and is connected to the top plate through a flange, ensuring the stability and safety of power transmission. By connecting the simulated drilling cylinder and the top plate through a flange, the connection between the two is made tighter and more stable. This connection method not only enhances the structural strength of the simulated drilling cylinder but also avoids possible loosening or falling off during the experiment, ensuring the smooth progress of the experiment. At the same time, the through hole opened on the top plate provides enough space for the cable, avoiding extrusion or damage to the cable during transmission and further improving the reliability of the experiment.

[0025] A fixed support 22 is installed at the position corresponding to the bottom of the transducer window inside the simulated drilling cylinder 2, which can ensure that the energetic electrode remains stable when emitting electro-chemical composite energy pulses and prevent experimental errors caused by vibration or displacement. This helps to improve the accuracy and reliability of the experiment.

[0026] The coal sample can and the simulated drill hole cylinder are connected by a flange. Connecting the coal sample can and the simulated drill hole cylinder through a flange makes the connection between the two more tight and stable, avoiding the loosening or falling off that may occur during the experiment. At the same time, this connection method also facilitates the disassembly and replacement of the coal sample can, improving the convenience of the experiment. The coal sample can includes a first coal sample can housing 19 and a second coal sample can housing 20 that are symmetrically installed along the longitudinal section. The first coal sample can housing 19 and the second coal sample can housing 20 are spliced to form the coal sample can. At the splicing position of the first coal sample can housing and the second coal sample can housing, a plurality of splicing ears 21 are installed along the length direction. The coal sample can is formed by splicing the first coal sample can housing and the second coal sample can housing that are symmetrically installed along the longitudinal section. This design makes the assembly and disassembly of the coal sample can simpler and more convenient. At the same time, installing a plurality of splicing ears 21 at the splicing position can further enhance the structural strength of the coal sample can and improve its stability during the experiment. A wire passing hole for passing the strain gauge connecting wire is installed at one end of the coal sample can away from the simulated drill hole cylinder. Installing the wire passing hole at one end of the coal sample can away from the simulated drill hole cylinder facilitates the passing and fixing of the strain gauge connecting wire, avoiding the interference and damage of the connecting wire during the experiment, and improving the accuracy and reliability of the experiment. The sampling can is a square can, and the splicing line is arranged at the edge position.

[0027] The support 1 is a square reaction frame installed around the simulated drill hole cylinder. The support is designed as a square reaction frame installed around the simulated drill hole cylinder, providing stable support and fixation for the simulated drill hole cylinder. This design not only enhances the stability of the simulated drill hole cylinder but also avoids the shaking or tilting that may occur during the experiment, ensuring the accuracy and reliability of the experiment. At the same time, the structure of the square reaction frame is simple and compact, facilitating installation and disassembly, and improving the convenience and flexibility of the experiment.

[0028] The technical principle of this embodiment is as follows: The power control host is connected to the 220V household power supply. After the start switch is turned on, the power control host charges the capacitor. When the switch is turned on again, the electrical energy is released from the capacitor to the energy conversion window through the coaxial cable, thereby detonating the energetic electrode in the energy conversion window. The energy conversion window is placed in the simulated drilling device, and the simulated drilling device is filled with water. The simulated drill hole is connected to the coal sample box, and there is a coal sample in the coal sample box. A strain gauge is attached to the surface of the coal sample, and the strain gauge is connected to the ultra-dynamic strain gauge. The metal wire and the energetic electrode of the chemical energetic material in the energy conversion window generate energy to form a shock wave in the liquid. The shock wave is reflected along the wall of the simulated drilling device, and the pulse wave pressure is monitored by the strain gauge, and the coal sample is also subjected to pulsed fracturing.

[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. An electro-chemical composite energy pulse fracture rock sample device, comprising a bracket, characterized in that: A simulated drilling module is arranged on the bracket, and the simulated drilling module includes a simulated drilling tube arranged upward, and a clamping device for clamping and fixing the simulated drilling tube is arranged on the bracket. The simulated drilling tube is filled with an energy transmission medium, and a transduction window for emitting an electro-chemical composite energy pulse to the coal sample is arranged at the middle position of the bottom of the simulated drilling tube, and energetic electrodes containing metal wires and chemical energetic materials are arranged in the transduction window, and the energetic electrodes are connected to the energy supply module, and a coal sample tank is symmetrically arranged along the longitudinal section at the release pulse position of the transduction window at the bottom of the simulated drilling tube, and a coal sample is arranged in the coal sample tank, and a strain gauge is attached to the surface of the coal sample, and the strain gauge is connected to the ultra-dynamic strain gauge through a strain gauge connecting line.

2. The electro-chemical composite energy pulse fracturing rock sample device according to claim 1, characterized in that: The clamping device includes a first clamping plate and a second clamping plate which are symmetrically arranged. The first clamping plate is fixedly arranged on the bracket and the clamping surface is in contact with the outer wall of the simulated drilling tube. The second clamping plate is movably arranged on the bracket. An adjusting screw is arranged on the bracket corresponding to the back of the second clamping plate. One end of the adjusting screw is rotatably connected to the second clamping plate, and the other end of the adjusting screw is provided with an adjusting handle. The adjusting screw is rotatably arranged on the bracket, and the clamping gap between the first clamping plate and the second clamping plate is adjusted by adjusting the screw.

3. The electro-chemical composite energy pulse rock sample fracturing device according to claim 2, characterized in that: The clamping surfaces of the first clamping plate and the second clamping plate are both V-shaped.

4. The electro-chemical composite energy pulse fracturing rock sample device according to claim 1, characterized in that: A fixed support is arranged in the simulated drilling tube at a position corresponding to the bottom of the transducing window.

5. The electro-chemical composite energy pulse fracture rock sample device according to claim 1, characterized in that: The coal sample tank and the simulated drilling tube are connected by a flange. The coal sample tank includes a first coal sample tank shell and a second coal sample tank shell which are symmetrically arranged along the longitudinal section. The first coal sample tank shell and the second coal sample tank shell are spliced ​​to form a coal sample tank. A plurality of splicing ears are arranged along the length direction at the splicing position of the first coal sample tank shell and the second coal sample tank shell. A threading hole for threading a strain gauge connecting line is arranged at the end of the coal sample tank which is away from the simulated drilling tube.

6. The electro-chemical composite energy pulse fracture rock sample device according to claim 1, characterized in that: The energy supply module includes a connected capacitor, a discharge control host, and an electric energy transmission cable. One end of the electric energy transmission cable is connected to the discharge control host, and the other end of the electric energy transmission cable is connected to the transduction window. The electric energy in the capacitor is released to the transduction window through the electric energy transmission cable.

7. The electro-chemical composite energy pulse rock sample fracturing device according to claim 6, characterized in that: The electric energy transmission cable coaxially passes through the top of the simulated drilling tube, the top of the simulated drilling tube is connected to a top plate via a flange, and a through hole is opened on the top plate.

8. The electro-chemical composite energy pulse rock sample fracturing device according to claim 1, characterized in that: The support is a square frame reaction frame arranged around the simulated drilling tube.

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