Coal bed gas reservoir permeability detection equipment

Abstract

The utility model relates to the technical field of coal seam mining, in particular to coal seam gas reservoir permeability detection equipment which comprises a base, a plurality of grooves are circularly distributed on the base, a containing barrel is inserted in each groove, a plurality of fixing blocks are fixed on the inner side wall of each containing barrel on the same horizontal plane, and the fixing blocks are fixed on the inner side wall of each containing barrel. A plurality of fixing blocks are arranged on the inner bottom wall of the containing barrel, a grid plate is jointly placed on the multiple fixing blocks, a water sensor is arranged on the inner bottom wall of the containing barrel below the grid plate, the multiple water sensors are jointly and electrically connected with a controller, and the controller is fixed to the base. When the synchronous detection device is used, a plurality of samples placed in the plurality of containing barrels can be synchronously detected, so that the time can be saved, the operation steps can be simplified, and the labor intensity of workers can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of coal seam mining technology, and in particular to a coalbed methane reservoir permeability testing device. Background Technology

[0002] Coal seam permeability refers to the property of allowing fluids to pass through its interconnected pores under a certain pressure difference. Coal seam permeability affects mining operations. During mining, permeability testing is necessary, and simulated permeability tests are conducted to determine if the underground coal seam structure has the potential to contain coalbed methane, thus avoiding the need for in-situ testing.

[0003] Currently, when testing the permeability of coal seam samples in the laboratory, in order to improve the accuracy of the experiment, multiple samples are taken for testing, and then the multiple samples are tested in sequence, which requires multiple operations and is cumbersome. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies in coal seam permeability testing, which cannot sequentially test multiple samples during laboratory testing, and to propose a coalbed methane reservoir permeability testing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A coalbed methane reservoir permeability testing device is designed, including a base with multiple grooves arranged in a circle on the base. A container is inserted into each groove. Multiple fixing blocks are fixed on the inner side wall of each container at the same horizontal plane. A grid plate is placed on the multiple fixing blocks. A water immersion sensor is provided on the inner bottom wall of the container below the grid plate. A controller is electrically connected to the multiple water immersion sensors. The controller is fixed on the base.

[0007] Preferably, a centralized water supply mechanism is fixed on the base at the center of the plurality of holding tanks.

[0008] Preferably, the centralized water supply mechanism includes an adjustment mechanism, which is fixed on the base at the center of the plurality of holding tanks. A disc is fixed on the adjustment mechanism, and a plurality of cylinders are fixed through the disc. The plurality of cylinders are arranged in a one-to-one correspondence with the plurality of holding tanks. Each cylinder is fixed with a solenoid valve, and the plurality of solenoid valves are electrically connected to the controller.

[0009] Preferably, the adjustment mechanism includes an electric telescopic rod, which is fixed to the base at the center of the plurality of containers and to the disc.

[0010] Preferably, a pressurizing mechanism is provided above the plurality of cylinders, and the pressurizing mechanism is fixed on the base.

[0011] Preferably, the pressurizing mechanism includes multiple piston plates, with each piston plate and multiple cylinders corresponding to each other. Each piston plate is fixed with an insert rod, and a fixing frame is fixed to the multiple insert rods. A lifting mechanism is fixed between the fixing frame and the base.

[0012] Preferably, the lifting mechanism includes two fixed plates, which are symmetrically fixed on the base. Each fixed plate is equipped with a linear motor, and each linear motor has a connecting plate fixed on its slider. Both connecting plates are fixed on the fixed frame, and both linear motors are electrically connected to the controller.

[0013] The beneficial effects of the coalbed methane reservoir permeability testing device proposed in this utility model are as follows: when using this coalbed methane reservoir permeability testing device, it can simultaneously test multiple samples placed in multiple containers, which can save time, simplify the operation steps, and reduce the labor intensity of the staff. Attached Figure Description

[0014] Figure 1 This is a front view of a coalbed methane reservoir permeability testing device proposed in this utility model;

[0015] Figure 2 This is a side view of a coalbed methane reservoir permeability testing device proposed in this utility model;

[0016] Figure 3 This utility model proposes a coalbed methane reservoir permeability testing device. Figure 1 Top view at point AA;

[0017] Figure 4 This utility model proposes a coalbed methane reservoir permeability testing device. Figure 1 Top view at point BB;

[0018] Figure 5 This utility model proposes a coalbed methane reservoir permeability testing device. Figure 1 A bottom view at point BB.

[0019] In the diagram: 1. Base; 2. Container; 3. Fixing block; 4. Mesh plate; 5. Water immersion sensor; 6. Electric telescopic rod; 7. Piston plate; 8. Disc; 9. Cylinder; 10. Solenoid valve; 11. Controller; 12. Fixing plate; 13. Linear motor; 14. Connecting plate; 15. Fixing frame; 16. Insert rod. Detailed Implementation

[0020] 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.

[0021] Example 1: Refer to Figure 1-4 A coalbed methane reservoir permeability testing device includes a base 1 with multiple grooves arranged in a circle on the base 1. Each groove contains a container 2. The multiple grooves allow the container 2 to be placed in a designated position when placed on the base 1. Multiple fixing blocks 3 are fixed on the same horizontal plane on the inner side wall of each container 2. A grid plate 4 is placed on the multiple fixing blocks 3. The multiple fixing blocks 3 can both support the grid plate 4 in a defined position and facilitate the removal of the grid plate 4 from the container 2. A water immersion sensor 5 is provided on the inner bottom wall of the container 2 below the grid plate 4. The multiple water immersion sensors 5 are electrically connected to a controller 11, which is fixed on the base 1. The water immersion sensors 5 can detect the water leaching from the sample. The permeability of water on the sample can be calculated by using the time difference between the sample contacting water and the water dripping from the sample.

[0022] A centralized water supply mechanism is fixed on the base 1 at the center of the multiple holding tanks 2. The centralized water supply mechanism includes an adjustment mechanism. The adjustment mechanism is fixed on the base 1 at the center of the multiple holding tanks 2. A disc 8 is fixed on the adjustment mechanism. Multiple cylinders 9 are fixed through the disc 8. The multiple cylinders 9 are set one-to-one with the multiple holding tanks 2. Water is placed at the center of the top of multiple samples at the same time using the multiple cylinders 9. The permeability of multiple samples can be calculated separately and then the average value can be taken.

[0023] Each cylinder 9 is fixed with a solenoid valve 10. Multiple solenoid valves 10 are electrically connected to a controller 11. The controller 11 controls multiple solenoid valves 10 simultaneously, allowing water to be released from multiple cylinders 9 at the same time. The adjustment mechanism includes an electric telescopic rod 6, which is fixed to a base 1 at the center of multiple containers 2. The electric telescopic rod 6 is fixed to a disc 8. The electric telescopic rod 6 can be used to adjust the height of multiple cylinders 9 without delaying the loading and unloading of multiple containers 2 on the base 1.

[0024] In use, multiple samples of the same size are placed at the center of multiple grid plates 4 in multiple holding containers 2. Then, the multiple holding containers 2 are placed in multiple grooves on the base 1. The electric telescopic rod 6 is activated, and the height of multiple cylinders 9 is lowered through the disc 8, so that the multiple cylinders 9 are respectively against the center of the top of multiple samples. Then, the controller 11 is used to simultaneously control multiple solenoid valves 10 to open, so that the water in the multiple cylinders 9 is released at the same time, allowing the water to permeate into the samples. The permeability of multiple samples is calculated and then averaged. In this process, time can be saved, the operation steps can be simplified, and the labor intensity of the staff can be reduced.

[0025] Example 2: In Example 1, when the water in the multiple cylinders 9 drains naturally, the water pressure is constant, making it impossible to measure the permeability of the sample when the water pressure changes. (Refer to...) Figure 1 , 2 3 and 5, as another preferred embodiment of this utility model, differ from embodiment 1 in that a pressurizing mechanism is provided above the multiple cylinders 9. The pressurizing mechanism is fixed on the base 1. The pressurizing mechanism can pressurize the water discharged from the multiple cylinders 9, thereby changing the water pressure that the water permeates into the sample.

[0026] The pressurizing mechanism includes multiple piston plates 7, and multiple cylinders 9 are arranged in a one-to-one correspondence. Each piston plate 7 is fixed with an insertion rod 16, and multiple insertion rods 16 are jointly fixed with a fixing frame 15. The fixing frame 15 and the base 1 are jointly fixed with a lifting mechanism. The lifting mechanism is used to adjust the multiple piston plates 7 so that the multiple piston plates 7 can be inserted into or pulled out of the multiple cylinders 9 respectively.

[0027] The lifting mechanism includes two fixed plates 12, which are symmetrically fixed on the base 1. Each fixed plate 12 is fixed with a linear motor 13, and each linear motor 13 has a connecting plate 14 fixed on its slider. Both connecting plates 14 are fixed on the fixed frame 15, and both linear motors 13 are electrically connected to the controller 11.

[0028] In use, after multiple cylinders 9 are placed against the center of the top of multiple samples, two linear motors 13 are started. The height of multiple piston plates 7 is lowered by two connecting plates 14, fixing brackets 15 and multiple insertion rods 16, so that multiple piston plates 7 are inserted into multiple cylinders 9 respectively. Then, multiple solenoid valves 10 are opened and multiple piston plates 7 continue to move downward. The pressure of water discharged from multiple cylinders 9 is increased by multiple moving piston plates 7, thereby changing the pressure of water permeating into the sample.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A coalbed methane reservoir permeability testing device, comprising a base (1), characterized in that, The base (1) has a plurality of grooves arranged in a circular pattern. Each groove contains a container (2). Each container (2) has a plurality of fixing blocks (3) fixed on the same horizontal plane on the inner side wall of the container (2). A grid plate (4) is placed on the plurality of fixing blocks (3). A water immersion sensor (5) is provided on the inner bottom wall of the container (2) below the grid plate (4). A controller (11) is electrically connected to the plurality of water immersion sensors (5). The controller (11) is fixed on the base (1).

2. The coalbed methane reservoir permeability testing equipment according to claim 1, characterized in that, A centralized water supply mechanism is fixed on the base (1) at the center of the plurality of containers (2).

3. The coalbed methane reservoir permeability testing equipment according to claim 2, characterized in that, The centralized water supply mechanism includes an adjustment mechanism, which is fixed on the base (1) at the center of the plurality of holding tanks (2). A disc (8) is fixed on the adjustment mechanism, and a plurality of cylinders (9) are fixed through the disc (8). The plurality of cylinders (9) are arranged one-to-one with the plurality of holding tanks (2). Each cylinder (9) is fixed with a solenoid valve (10), and the plurality of solenoid valves (10) are electrically connected to the controller (11).

4. The coalbed methane reservoir permeability testing equipment according to claim 3, characterized in that, The adjustment mechanism includes an electric telescopic rod (6), which is fixed on the base (1) at the center of the plurality of containers (2) and on the disc (8).

5. The coalbed methane reservoir permeability testing equipment according to claim 3, characterized in that, A pressurizing mechanism is provided above the multiple cylinders (9), and the pressurizing mechanism is fixed on the base (1).

6. The coalbed methane reservoir permeability testing equipment according to claim 5, characterized in that, The pressurizing mechanism includes multiple piston plates (7), and multiple cylinders (9) are arranged in a one-to-one correspondence. Each piston plate (7) is fixed with an insertion rod (16), and multiple insertion rods (16) are jointly fixed with a fixing frame (15). The fixing frame (15) and the base (1) are jointly fixed with a lifting mechanism.

7. The coalbed methane reservoir permeability testing equipment according to claim 6, characterized in that, The lifting mechanism includes two fixed plates (12), which are symmetrically fixed on the base (1). Each fixed plate (12) is fixed with a linear motor (13), and each linear motor (13) has a connecting plate (14) fixed on its slider. Both connecting plates (14) are fixed on the fixed frame (15), and both linear motors (13) are electrically connected to the controller (11).

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