Coal bed gas water injection wellhead device

Abstract

The utility model relates to the technical field of well mouth water injection devices, and discloses a coal bed gas water injection well mouth device which comprises a main flow pipe and an adjusting assembly, the adjusting assembly is located on the outer side of the main flow pipe and comprises a water outlet, the water outlet is formed in the outer end of the main flow pipe, and the outer end of the water outlet is fixedly communicated with a water inlet pipe. A containing groove is formed in the outer end of the water inlet pipe. According to the coal bed gas water injection wellhead device, by installing the adjusting assembly, when water is injected into a coal bed, the humidity and the water injection range of surrounding coal bodies after water injection can be transmitted to the control panel through the humidity detector, and then through cooperation of a motor, a valve and other components, part of too-humid coal bodies can be reduced to be injected into a water source; the water resource waste caused by waste of a large amount of water resources on the coal body with the humidity exceeding the expected humidity due to the fact that water is injected into the media with the humidity exceeding the expected humidity of the surrounding part of the coal body is avoided, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wellhead water injection devices, in particular to a coalbed methane water injection wellhead device. Background Art

[0002] Coal seam water injection refers to the process of injecting pressurized water into coal seams through drilling holes before mining to pre-wet the coal body, which can reduce the amount of coal dust generated. Injecting water evenly into the coal body with a moisture content of more than 4% can prevent coal outbursts. Water changes the mechanical properties of coal, making stress distribution uniform, the elastic energy release rate slower, the power lowered, and the methane emission rate lowered by 90% compared to the initial release.

[0003] Research and experimental investigations have shown that injecting water to moisten the coal body can cause significant changes in the mechanical properties of the coal, reducing the elasticity and strength of the coal and increasing its plasticity, thereby changing the pressure distribution in front of the tunnel, that is, the high pressure is transferred to the deep part of the coal body, and the pressure concentration coefficient is reduced. After the coal body is moistened, its permeability will also be reduced by hundreds or thousands of times. Water has a significant hindering effect on the movement of gas, and the amount and speed of gas outburst in the coal are greatly reduced. The above-mentioned changes all indicate that injecting water to moisten the coal body can eliminate or reduce the risk of coal seam outbursts and reduce the gas concentration in the return air flow of the working face.

[0004] Existing wellhead water injection devices generally inject water directly into the coal gas layer. When injecting water around, the range of the surrounding water injection points is not the same, resulting in the humidity of the surrounding coal body exceeding the expected humidity, thereby wasting a lot of water resources to irrigate the coal body with excess humidity. Utility Model Content

[0005] The utility model aims to provide a coalbed methane water injection wellhead device to solve the problem in the above-mentioned background technology that the surrounding ranges of the water injection point are different, resulting in the humidity of some coal bodies exceeding the expected humidity, thereby wasting a large amount of water resources to moderately inject water into the coal body exceeding the expected humidity.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coalbed methane water injection wellhead device, comprising a main pipe and an adjusting component, the adjusting component is located on the outside of the main pipe, the adjusting component comprises a water outlet, the water outlet is arranged at the outer end of the main pipe, the outer end of the water outlet is fixedly connected with a water inlet pipe, the outer end of the water inlet pipe is provided with a placement groove, the interior of the placement groove is fixedly connected with a valve, the upper end of the valve is fixedly installed with a motor, the outer end of the motor is fixedly installed with a protective box, the outer end of the water inlet pipe is fixedly connected with a water inlet cylinder, the A notch is provided in the middle of the outer end of the water inlet cylinder, and a humidity detector is fixedly installed inside the notch. By installing an adjustment component, when water is injected into the gas layer, the humidity of the surrounding coal body after water injection and the injection range can be transmitted to the control panel through the humidity detector, and then through the cooperation between the motor, valve and other components, the water injection into part of the overly humid coal body can be reduced, avoiding water injection into the media where the humidity of the surrounding coal body exceeds the expected humidity, resulting in a large amount of water resources being wasted on the coal body with a humidity exceeding the expected humidity, thereby wasting water resources and improving the practicality of the device.

[0007] Preferably, the outer end of the water inlet cylinder is fixedly connected to a water outlet pipe, the outer end of the water outlet pipe is fixedly connected to a diversion pipe, and the outer end of the diversion pipe is provided with a diversion port.

[0008] Preferably, the transmission end of the lower end of the motor is connected to the valve, and the valve is inside the protective box. A support column is fixedly installed on the left side of the main pipe, and a control panel is fixedly installed on the upper end of the support column. By installing a water supply component, during the water injection process, the water source in the water tank cannot keep up with the water source lost in the main pipe. Through the cooperation between components such as the water supply pipe, the water source can be continuously transported to the water tank, so as to avoid the situation in which the water resources cannot keep up with the injection volume during the water injection process, resulting in the subsequent work progress of the gas layer water injection, which is beneficial to improving the water injection efficiency of the device.

[0009] Preferably, a water supply assembly is provided above the main pipe, and the water supply assembly includes a water tank, the water tank is fixedly connected to the upper end of the main pipe, the rear end of the water tank is fixedly connected to a water supply pipe, a fixing frame is fixedly installed in the middle of the lower end of the water tank, a hole is opened at the upper end of the fixing frame, and the outer end of the upper end of the main pipe is fixedly connected to a water pump.

[0010] Preferably, a sealing ring is fixedly installed on the outer end of the water pump, a support frame is fixedly installed on the lower end of the water tank, a wellhead is opened on the lower side of the support frame, and the main flow pipe is inside the wellhead.

[0011] Preferably, the main pipe is inside the hole, the water pump is in the middle of the lower end of the water tank, and the sealing ring is fixedly installed on the inner end of the water tank. By installing the adjustment component, when injecting water into the gas layer, the water output of the branch pipe in each direction can be adjusted through the cooperation between the control panel and other components, so as to avoid the water source injecting water into the surrounding area during use, causing part of the coal body to be too wet, thereby affecting the quality of the media and wasting water resources, which is conducive to improving the practicality of the device.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The coalbed methane water injection wellhead device is installed with an adjustment component. When water is injected into the coal gas layer, the humidity of the surrounding coal body after water injection and the water injection range can be transmitted to the control panel through the humidity detector. Then, through the cooperation between the motor and the valve and other components, the water source injected into the part of the coal body that is too wet can be reduced, so as to avoid injecting water into the media with the humidity of the surrounding part of the coal body exceeding the expected humidity, resulting in a large amount of water resources being wasted on the coal body exceeding the expected humidity, thereby wasting water resources and improving the practicality of the device;

[0014] 2. The coalbed methane water injection wellhead device is equipped with a water supply component. During the water injection process, the water source in the water tank cannot keep up with the water source lost in the main pipe. Through the cooperation between the water supply pipe and other components, the water source can be continuously transported to the water tank, so as to avoid the water resources not keeping up with the water injection volume during the water injection process, which leads to the subsequent work progress of the coalbed methane water injection, and is conducive to improving the water injection efficiency of the device;

[0015] 3. The coalbed methane water injection wellhead device is installed with an adjustment component. When injecting water into the gas layer, the water output of the diversion pipe in each direction can be adjusted through the cooperation between the control panel and other components, so as to avoid the water source injecting water into the surrounding area during use, causing part of the coal body to be too wet, thereby affecting the quality of the media and wasting water resources, which is conducive to improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the three-dimensional partial structure of the utility model;

[0018] Figure 3 This is a three-dimensional partial enlarged structural diagram of the adjustment component of the utility model;

[0019] Figure 4 This is a partially enlarged structural schematic diagram of the cross-section of the adjustment component of the utility model;

[0020] Figure 5 It is a partial enlarged structural schematic diagram of the cross section of the water supply component of the utility model;

[0021] Figure 6 It is a three-dimensional partial enlarged structural schematic diagram of the water supply component of the utility model.

[0022] In the figure: 1. Main pipe; 2. Adjustment component; 201. Water outlet; 202. Water inlet pipe; 203. Placement slot; 204. Valve; 205. Motor; 206. Protection box; 207. Water inlet cylinder; 208. Notch; 209. Humidity detector; 210. Water outlet pipe; 211. Diversion pipe; 212. Diversion port; 213. Support column; 214. Control panel; 3. Water supply component; 301. Water tank; 302. Water supply pipe; 303. Fixing frame; 304. Hole; 305. Water pump; 306. Sealing ring; 307. Support frame; 4. Wellhead. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 6The utility model provides a technical solution: a coalbed methane water injection wellhead device, including a main flow pipe 1 and an adjusting component 2, the adjusting component 2 is located outside the main flow pipe 1, the adjusting component 2 includes a water outlet 201, the water outlet 201 is opened at the outer end of the main flow pipe 1, the outer end of the water outlet 201 is fixedly connected with a water inlet pipe 202, the outer end of the water inlet pipe 202 is opened with a placement groove 203, the interior of the placement groove 203 is fixedly connected with a valve 204, and the upper end of the valve 204 is fixedly installed with an electric The outer end of the motor 205 is fixedly installed with a protective box 206, the outer end of the water inlet pipe 202 is fixedly connected with a water inlet cylinder 207, a notch 208 is provided in the middle of the outer end of the water inlet cylinder 207, a humidity detector 209 is fixedly installed inside the notch 208, the outer end of the water inlet cylinder 207 is fixedly connected with a water outlet pipe 210, the outer end of the water outlet pipe 210 is fixedly connected with a shunt pipe 211, and a shunt port 212 is provided at the outer end of the shunt pipe 211. The transmission end at the lower end of the motor 205 is connected to the The valve 204 is connected, and the valve 204 is inside the protection box 206. A support column 213 is fixedly installed on the left side of the main pipe 1, and a control panel 214 is fixedly installed on the upper end of the support column 213. The water flows from the water outlet 201 to the water inlet cylinder 207 through the valve 204, and then flows into the diversion pipe 211 through the water outlet pipe 210, and is sprayed into the coal gas layer from the diversion port 212, which can change the physical and mechanical properties of coal, reduce the generation of coal dust, and reduce the impact of ground pressure, coal and coalbed methane burst During the process, the humidity in the coal is transmitted to the control panel 214 through the humidity detector 209. When the humidity of the coal exceeds the expected humidity, the position where the humidity of the coal exceeds the expected humidity can be moved through the control panel 214 to start the motor 205 at that position. The start of the control panel 214 drives the movement of the upper end of the valve 204, so that the valve 204 reduces the water output. When the water resources in the water tank 301 are insufficient, the water in the water tank 301 is filled through the water supply pipe 302.

[0025] A water supply assembly 3 is arranged above the main flow pipe 1. The water supply assembly 3 includes a water tank 301. The water tank 301 is fixedly connected to the upper end of the main flow pipe 1. The rear end of the water tank 301 is fixedly connected to a water supply pipe 302. A fixing frame 303 is fixedly installed in the middle of the lower end of the water tank 301. A hole 304 is opened at the upper end of the fixing frame 303. A water pump 305 is fixedly connected to the outer end of the upper end of the main flow pipe 1. A sealing ring 306 is fixedly installed at the outer end of the water pump 305. A support 306 is fixedly installed at the lower end of the water tank 301. A support frame 307 is provided with a wellhead 4 on the lower side of the support frame 307, a mainstream pipe 1 is inside the wellhead 4, the mainstream pipe 1 is inside the hole 304, a water pump 305 is in the middle of the lower end of the water tank 301, and a sealing ring 306 is fixedly installed at the inner end of the water tank 301. When it is necessary to inject water into the gas layer, the water supply pipe 302 is first connected to a position with a large amount of water resources, and then the water pump 305 is started. The start of the water pump 305 allows the water source to flow into the mainstream pipe 1 through the water pump 305, and then flow into each branch.

[0026] Working principle: When it is necessary to inject water into the coal gas layer, first connect the water supply pipe 302 to a location with a large amount of water resources, and then start the water pump 305. The start of the water pump 305 allows the water source to flow into the main pipe 1 through the water pump 305, and then flow into each branch. The water flows from the water outlet 201 through the valve 204 to the water inlet cylinder 207, and then flows into the diversion pipe 211 through the water outlet pipe 210, and then sprays into the coal gas layer from the diversion port 212, which can change the physical and mechanical properties of coal, reduce the generation of coal dust, and also reduce the impact Ground pressure, coal and coal-bed methane outbursts and spontaneous combustion, during which the humidity in the coal is transmitted to the control panel 214 through the humidity detector 209. When the humidity of the coal exceeds the expected humidity, the position where the humidity of the coal exceeds the coal can be moved through the control panel 214, and the motor 205 at that position can be started. The start of the control panel 214 drives the movement of the upper end of the valve 204, so that the valve 204 reduces the water output. When the water resources in the water tank 301 are insufficient, the water in the water tank 301 is filled through the water supply pipe 302.

[0027] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A coalbed methane water injection wellhead device, comprising a main flow pipe (1) and a regulating assembly (2), characterized in that: The regulating component (2) is located outside the main pipe (1), and comprises a water outlet (201). The water outlet (201) is provided at the outer end of the main pipe (1), the outer end of the water outlet (201) is fixedly connected to a water inlet pipe (202), the outer end of the water inlet pipe (202) is provided with a placement groove (203), the interior of the placement groove (203) is fixedly connected to a valve (204), the upper end of the valve (204) is fixedly mounted with a motor (205), the outer end of the motor (205) is fixedly mounted with a protection box (206), the outer end of the water inlet pipe (202) is fixedly connected to a water inlet cylinder (207), the middle part of the outer end of the water inlet cylinder (207) is provided with a notch (208), and the interior of the notch (208) is fixedly mounted with a humidity detector (209).

2. The coalbed methane water injection wellhead device according to claim 1, characterized in that: The outer end of the water inlet cylinder (207) is fixedly connected to a water outlet pipe (210), the outer end of the water outlet pipe (210) is fixedly connected to a diversion pipe (211), and the outer end of the diversion pipe (211) is provided with a diversion port (212).

3. The coalbed methane water injection wellhead device according to claim 2, characterized in that: The transmission end at the lower end of the motor (205) is connected to the valve (204), and the valve (204) is inside the protection box (206). A support column (213) is fixedly installed on the left side of the main flow pipe (1), and a control panel (214) is fixedly installed on the upper end of the support column (213).

4. The coalbed methane water injection wellhead device according to claim 3, characterized in that: A water supply assembly (3) is arranged above the main flow pipe (1), and the water supply assembly (3) comprises a water tank (301). The water tank (301) is fixedly connected to the upper end of the main flow pipe (1), a water supply pipe (302) is fixedly connected to the rear end of the water tank (301), a fixing frame (303) is fixedly installed in the middle of the lower end of the water tank (301), a hole (304) is opened at the upper end of the fixing frame (303), and a water pump (305) is fixedly connected to the outer end of the upper end of the main flow pipe (1).

5. The coalbed methane water injection wellhead device according to claim 4, characterized in that: A sealing ring (306) is fixedly mounted on the outer end of the water pump (305), a support frame (307) is fixedly mounted on the lower end of the water tank (301), a wellhead (4) is provided on the lower side of the support frame (307), and the main flow pipe (1) is inside the wellhead (4).

6. The coalbed methane water injection wellhead device according to claim 5, characterized in that: The main pipe (1) is inside the hole (304), the water pump (305) is in the middle of the lower end of the water tank (301), and the sealing ring (306) is fixedly installed at the inner end of the water tank (301).

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