Hydraulic fracturing device for improving permeability of coal seam

Abstract

The utility model belongs to the technical field of hydraulic fracturing, and particularly discloses a hydraulic fracturing device for improving permeability of a coal seam, which comprises a base, a storage box, a fracturing pump, a shunt pipe and a hydraulic fracturing drill rod, one side of the base is connected with a first driving motor through a mounting frame, the output end of the first driving motor is connected with a stirring rod, and the bottom end of the stirring rod extends into the storage box; the liquid inlet end of the fracturing pump is communicated with the storage box, the liquid outlet end of the fracturing pump is communicated with the starting ends of the multiple flow dividing pipes, the tail ends of the flow dividing pipes are connected with the hydraulic fracturing drill rod, and the hydraulic fracturing drill rod extends into a drill hole of a coal seam. According to the hydraulic fracturing device, the first driving motor provides power to drive the stirring disc to rotate, and the fracturing fluid is uniformly stirred through the blades, so that the fracturing fluid is stirred more sufficiently, base fluid and various additives can be mixed more sufficiently, and the hydraulic fracturing effect is further improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic fracturing technology, specifically to a hydraulic fracturing device for improving the permeability of coal seams. Background Technology

[0002] Coal seams in my country's mines are generally characterized by high ground stress and low permeability. Solving the problem of gas drainage in low-permeability coal seams has always been a key link in ensuring safe production and improving coal mine efficiency. Among them, hydraulic fracturing, a representative hydraulic measure, is widely used to enhance coal seam permeability. Hydraulic fracturing uses a high-pressure pump (or fracturing pump) to inject high-viscosity fracturing fluid into the coal seam. With the support of the weak surface of the coal wall, the fracturing fluid overcomes the frictional resistance of the borehole wall in the pores and fractures of the coal seam. The injection rate is greater than the fluid loss rate, and the internal water pressure of the high-pressure water increases. After reaching the tensile strength of the coal wall, stress concentration forms at the fracture tip, causing the fracture to open and enter the next weak surface, generating more artificial fractures. These fractures interconnect and form a fracture network, increasing the permeability of the coal seam, enhancing the desorption of adsorbed gas, improving gas drainage efficiency, and reducing gas content and pressure.

[0003] However, existing hydraulic fracturing equipment involves adding water and various additives (such as gelling agents and drag reducers) into the device and outputting them through a fracturing pump. However, the water and additives are not fully mixed, and the gelling agent needs to be evenly dispersed in the water to form an effective gel structure. Furthermore, since the density of the proppant is higher than that of the base fluid, prolonged static conditions can lead to additive stratification and proppant sedimentation. Therefore, direct output can easily cause the underground fractures to break up, resulting in poor support and blockage of related structural components.

[0004] Therefore, this utility model proposes a hydraulic fracturing device for improving the permeability of coal seams. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic fracturing device for improving the permeability of coal seams. This hydraulic fracturing device can uniformly stir the fracturing fluid and effectively improve the fracturing effect.

[0006] To achieve the above objectives, this utility model adopts the following technical solution:

[0007] A hydraulic fracturing device for improving coal seam permeability includes a base, a storage tank, a fracturing pump, a diversion pipe, and a hydraulic fracturing drill pipe;

[0008] The base is equipped with a storage tank and a fracturing pump on its top. The storage tank has a feed inlet on its top and a discharge outlet on its side wall.

[0009] A mounting bracket is provided on one side of the base. A first drive motor and a stirring rod are provided on the mounting bracket. The first drive motor is located directly above the storage tank. The cylinder end of the first drive motor is connected to the mounting bracket through a motor bracket. The output end of the first drive motor is connected to the top of the stirring rod. The stirring rod is vertically arranged. The bottom end of the stirring rod extends into the interior of the storage tank, and a stirring plate is fixedly connected to the bottom end of the stirring rod.

[0010] The inlet of the fracturing pump is connected to the outlet of the storage tank, and the outlet of the fracturing pump is connected to the beginning of the diversion pipe. The end of the diversion pipe is connected to the hydraulic fracturing drill rod, which extends into the borehole of the coal seam.

[0011] Preferably, the mounting frame is further provided with a lifting mechanism, which is used to drive the first drive motor and the stirring rod to rise and fall. The lifting mechanism includes a second drive motor, a drive wheel, a transmission belt, a driven wheel, a lead screw, a lead screw seat, a guide rod, and a slider.

[0012] The cylinder end of the second drive motor is connected to the mounting bracket, and the output end of the second drive motor is connected to the middle position of the drive wheel. The drive wheel is connected to the driven wheel through a transmission belt, and the middle position of the driven wheel is connected to the end of the lead screw.

[0013] Both the lead screw and the guide rod are vertically mounted on the mounting frame. The lead screw is provided with a lead nut, which is connected to the motor bracket through a lead nut seat. The slider is slidably connected to the guide rod and is connected to the motor bracket.

[0014] Preferably, the mounting bracket is provided with a limit sensor.

[0015] Preferably, the mounting bracket is also equipped with a controller, wherein the control terminals of the first drive motor, the second drive motor, the fracturing pump, and the limit sensor are all connected to the controller via signal cables.

[0016] Preferably, the stirring plate is provided with multiple blades around its perimeter, wherein the multiple blades are arranged in an alternating vertical arrangement along the plane of the stirring plate.

[0017] Preferably, a one-way shut-off valve is provided on the diversion pipe.

[0018] Preferably, the diverter is also equipped with a pressure gauge and a flow meter.

[0019] Preferably, rollers are provided at the corners of the base.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention proposes a hydraulic fracturing device for improving coal seam permeability. The device uses a first drive motor to power a mixing disc, which rotates the fracturing fluid and uses blades to uniformly stir the fracturing fluid. A lifting mechanism is added to indirectly drive the mixing disc to rise and fall, resulting in more thorough stirring of the fracturing fluid and more complete mixing of the base fluid and various additives. This ensures stable viscosity and function, further improving the hydraulic fracturing effect and effectively reducing the risk of clogging, thus guaranteeing safe production operations in coal mines.

[0022] This utility model hydraulic fracturing device has a high degree of intelligence. The operator can control the hydraulic fracturing device as a whole through the controller, which not only effectively improves work efficiency but also reduces the workload of the operator and saves certain labor costs, which meets the development requirements of modern mining. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a partial structural schematic diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the assembly of the diversion pipe and hydraulic fracturing drill rod of this utility model;

[0026] Figure 4 This is a schematic diagram of the lifting mechanism of this utility model. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the lifting mechanism of this utility model. Figure 2 ;

[0028] Figure 6 This is a schematic diagram of the structure of the stirring rod and stirring plate of this utility model;

[0029] Among them, 1-base; 11-roller; 12-mounting bracket; 2-storage box;

[0030] 30-Motor bracket, 31 First drive motor, 32-Stirring rod, 33-Stirring disc, 34-Blade;

[0031] 4-Fracturing pump; 5-Diverter pipe; 51-Pressure gauge; 52-Flow meter; 53-One-way shut-off valve;

[0032] 6-Hydraulic fracturing drill pipe;

[0033] 7-Lifting mechanism: 71-Second drive motor, 72-Drive wheel, 73-Transmission belt, 74-Driven wheel, 75-Lead screw, 76-Lead screw nut, 77-Guide rod, 78-Slider, 79-Limit sensor; 8-Controller. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Combination Figures 1 to 6 As shown, this utility model proposes a hydraulic fracturing device for improving coal seam permeability. This hydraulic fracturing device can uniformly agitate the fracturing fluid, reduce the occurrence of blockages, and effectively improve and enhance the fracturing effect. The hydraulic fracturing device mainly includes structural components such as a base 1, a storage tank 2, a fracturing pump 4, a diversion pipe 5, and a hydraulic fracturing drill rod 6.

[0037] Combination Figure 1 and Figure 2 As shown, a storage tank 2 and a fracturing pump 4 are installed on the top of the base 1. The storage tank 2 is used to temporarily store fracturing fluid. The top of the storage tank 2 has a feed inlet, and the side wall of the storage tank 2 has a discharge outlet.

[0038] Combination Figure 1 and Figure 2 As shown, a mounting bracket 12 is provided on one side of the base 1. A first drive motor 31 and a stirring rod 32 are provided on the mounting bracket 12. The first drive motor 31 is located directly above the storage tank 2. The cylinder end of the first drive motor 31 is connected to the mounting bracket 12 through a motor bracket 30. The output end of the first drive motor 31 is connected to the top of the stirring rod 32. The stirring rod 32 is vertically arranged, and the bottom end of the stirring rod 32 extends into the interior of the storage tank 2.

[0039] Combination Figure 4 and Figure 6As shown, a stirring rod 32 is fixedly connected to a stirring disc 33 at its bottom end, and multiple blades 34 are arranged around the periphery of the stirring disc 33. These blades 34 are staggered vertically along the plane of the stirring disc 33. Power is provided by a first drive motor 31 to rotate the stirring disc 33. Simultaneously, the multiple blades 34 uniformly stir the fracturing fluid, preventing proppant sedimentation and ensuring thorough mixing of water and additives, effectively improving the fracturing effect.

[0040] Combination Figure 1 and Figure 2 As shown, the mounting frame 30 is also equipped with a lifting mechanism 7, which is used to drive the first drive motor 31 and the stirring rod 32 to rise and fall. By adding the lifting mechanism 7, the stirring can be more thorough, thereby further improving the fracturing effect.

[0041] Combination Figure 4 and Figure 5 As shown, the lifting mechanism 7 mainly includes structural components such as a second drive motor 71, a drive wheel 72, a transmission belt 73, a driven wheel 74, a lead screw 75, a lead screw seat 76, a guide rod 77, and a slider 78.

[0042] The cylinder end of the second drive motor 71 is connected to the mounting bracket 12, and the output end of the second drive motor 71 is connected to the middle position of the drive wheel 72. The drive wheel 72 is connected to the driven wheel 74 through the transmission belt 73, and the middle position of the driven wheel 74 is connected to the end of the lead screw 75. The lead screw 75 and the guide rod 77 are both vertically mounted on the mounting bracket 12. The lead screw 75 is provided with a lead screw nut, which is connected to the motor bracket 30 through a lead screw nut seat 76. The slider 78 is slidably connected to the guide rod 77 and is connected to the motor bracket 30.

[0043] The second drive motor 71 provides power to drive the motor bracket 30 to move vertically up and down along the guide rod 77, thereby changing the position height of the mixing plate 33, making the mixing more thorough, and ensuring that the base liquid and various additives (such as gelling agents and drag reducers) can be fully mixed, ensuring viscosity and functional stability, thereby further improving the fracturing effect.

[0044] Combination Figure 5 As shown, a limit sensor 79 is provided on the mounting bracket 12 to limit the extreme position of the longitudinal movement of the first drive motor 31 and prevent damage to the device.

[0045] Combination Figure 1 and Figure 2 As shown, rollers 11 are provided at the corners of the bottom of the base 1, and handles are also provided to facilitate the movement of the hydraulic fracturing device by the staff, which effectively improves the work efficiency.

[0046] Combination Figure 1As shown, the fracturing pump 4 is used to provide power to output fracturing fluid to the diversion pipe 5. The inlet end of the fracturing pump 4 is connected to the outlet of the storage tank 2, the outlet end of the fracturing pump 4 is connected to the beginning of the diversion pipe 5, and the end of the diversion pipe 5 is connected to the hydraulic fracturing drill rod 6, which extends into the borehole of the coal seam.

[0047] Combination Figure 3 As shown, a one-way shut-off valve 53 is installed on the diversion pipe 5 to facilitate timely intervention and control of the hydraulic fracturing process by staff.

[0048] Combination Figure 3 As shown, a pressure gauge 51 and a flow meter 52 are also installed on the diversion pipe 5. The water pressure and flow rate can be accurately controlled by the readings of the pressure gauge 51 and the flow meter 52, thereby controlling the effect of hydraulic fracturing.

[0049] Combination Figure 1 As shown, a controller 8 is also installed on the mounting frame 12. The control terminals of the first drive motor 31, the second drive motor 71, the fracturing pump 4, and the limit sensor 79 are all connected to the controller 8 via signal cables. Operators can use the controller 8 to achieve overall control of the hydraulic fracturing device, which effectively improves work efficiency, reduces the workload of operators, saves labor costs, and meets the development requirements of modern mining.

[0050] Combination Figures 1 to 6 As shown, this utility model proposes a hydraulic fracturing device for improving the permeability of coal seams. The hydraulic fracturing device is powered by a first drive motor 31 to drive the stirring disc 33 to rotate. The blades 34 are used to uniformly stir the fracturing fluid. At the same time, the stirring disc 33 is indirectly driven to rise and fall by the addition of a lifting mechanism 7, so that the stirring of the fracturing fluid is more thorough. The base fluid and various additives (such as gelling agents and drag reducers) can be more fully mixed, ensuring viscosity and functional stability, further improving the effect of hydraulic fracturing, and effectively reducing the occurrence of blockage in the device. At the same time, it also ensures the safe production operation of coal mines.

[0051] Of course, the above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model and should be protected by the present utility model.

Claims

1. A hydraulic fracturing device for improving coal seam permeability, characterized in that, Includes base, storage tank, fracturing pump, diversion pipe and hydraulic fracturing drill pipe; The base is equipped with a storage tank and a fracturing pump on its top. The storage tank has a feed inlet on its top and a discharge outlet on its side wall. A mounting bracket is provided on one side of the base. A first drive motor and a stirring rod are provided on the mounting bracket. The first drive motor is located directly above the storage tank. The cylinder end of the first drive motor is connected to the mounting bracket through a motor bracket. The output end of the first drive motor is connected to the top of the stirring rod. The stirring rod is vertically arranged. The bottom end of the stirring rod extends into the interior of the storage tank, and a stirring plate is fixedly connected to the bottom end of the stirring rod. The inlet of the fracturing pump is connected to the outlet of the storage tank, and the outlet of the fracturing pump is connected to the beginning of the diversion pipe. The end of the diversion pipe is connected to the hydraulic fracturing drill rod, which extends into the borehole of the coal seam.

2. The hydraulic fracturing device for improving coal seam permeability according to claim 1, characterized in that, The mounting frame is also equipped with a lifting mechanism, which is used to drive the first drive motor and the stirring rod to rise and fall. The lifting mechanism includes a second drive motor, a drive wheel, a transmission belt, a driven wheel, a lead screw, a lead screw seat, a guide rod, and a slider. The cylinder end of the second drive motor is connected to the mounting bracket, and the output end of the second drive motor is connected to the middle position of the drive wheel. The drive wheel is connected to the driven wheel through a transmission belt, and the middle position of the driven wheel is connected to the end of the lead screw. Both the lead screw and the guide rod are vertically mounted on the mounting frame. The lead screw is provided with a lead nut, which is connected to the motor bracket through a lead nut seat. The slider is slidably connected to the guide rod and is connected to the motor bracket.

3. A hydraulic fracturing device for improving coal seam permeability according to claim 2, characterized in that, Limit sensors are installed on the mounting bracket.

4. A hydraulic fracturing device for improving coal seam permeability according to claim 3, characterized in that, The mounting bracket is also equipped with a controller, wherein the control terminals of the first drive motor, the second drive motor, the fracturing pump, and the limit sensor are all connected to the controller via signal cables.

5. A hydraulic fracturing device for improving coal seam permeability according to claim 1, characterized in that, The mixing plate is provided with multiple blades around its perimeter, and the blades are arranged in an alternating vertical arrangement along the plane of the mixing plate.

6. A hydraulic fracturing device for improving coal seam permeability according to claim 1, characterized in that, A one-way shut-off valve is installed on the shunt pipe.

7. A hydraulic fracturing device for improving coal seam permeability according to claim 1, characterized in that, The shunt pipe is also equipped with a pressure gauge and a flow meter.

8. A hydraulic fracturing device for improving coal seam permeability according to claim 1, characterized in that, The base is equipped with casters at each corner.

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