Circulating pipe type floating ball exhaust device and coal-bed gas well water pipe network

Abstract

The invention discloses a circulating pipe type floating ball exhaust device and a coal-bed gas well water pipe network, and belongs to the technical field of coal-bed gas wells. The circulating pipe type floating ball exhaust device comprises a liquid storage tank, a liquid inlet pipe, a heating assembly, a liquid level tracking assembly, an exhaust valve and a liquid outlet pipe. The liquid storage tank communicates with the liquid inlet pipe and the liquid outlet pipe, and the heating assembly is arranged on the liquid inlet pipe; the exhaust valve is arranged on the liquid storage tank, the liquid level tracking assembly is arranged in the liquid storage tank, and the liquid level tracking assembly is connected with the exhaust valve, so that the liquid level in the liquid storage tank is detected through the liquid level tracking assembly, and opening and closing of the exhaust valve are controlled. According to the circulating pipe type floating ball exhaust device and the coal-bed gas well water pipe network, the problems that the pipe network pressure is increased, and the pipeline sealing performance, the flowing performance and the safety performance are degraded due to separation of coal-bed gas in the water pipe network can be solved.

Description

Technical Field

[0001] This application belongs to the technical field of coalbed methane well equipment, and particularly relates to a circulating tube type floating ball exhaust device and a coalbed methane well water pipe network. Background Art

[0002] During the process of drainage and gas production in coalbed methane wells, due to the relatively high bottom hole flowing pressure, the coalbed methane dissolved in water will enter the water pipe network. During the flow in the water pipe network, as the pressure decreases, it will precipitate, resulting in a large amount of coalbed methane always existing in the water pipe network. The accumulation of a large amount of coalbed methane will increase the water pressure in the water pipeline, reduce the sealing effect of the pipeline sealers to a certain extent, shorten the packing replacement cycle, and increase the risk of water leakage. At the same time, coalbed methane is prone to form plug flow in the pipeline. As the terrain changes, the gas in some pipelines is compressed, and the gas in some pipelines expands, forming pressure fluctuations, affecting the pipeline life and forming gas blockage. On the other hand, the direct emission of methane in the water pipeline into the air will cause environmental protection hazards; it will also accelerate the corrosion and blockage of the water pipeline to a certain extent. Summary of the Invention

[0003] This application provides a circulating tube type floating ball exhaust device and a coalbed methane well water pipe network, aiming to at least solve to a certain extent the technical problems that the precipitation of coalbed methane in the water pipe network of coalbed methane wells leads to an increase in the network pressure, deterioration of the pipeline sealing performance, flow performance, and safety performance. For this purpose,

[0004] The circulating tube type floating ball exhaust device provided by the embodiment of this application includes: a liquid storage tank, a liquid inlet pipe, a heating assembly, a liquid level tracking assembly, an exhaust valve, and a liquid outlet pipe;

[0005] The liquid storage tank is respectively communicated with the liquid inlet pipe and the liquid outlet pipe, and the heating assembly is arranged on the liquid inlet pipe;

[0006] The exhaust valve is arranged on the liquid storage tank, the liquid level tracking assembly is arranged in the liquid storage tank, and the liquid level tracking assembly is connected to the exhaust valve to detect the liquid level in the liquid storage tank through the liquid level tracking assembly, so as to control the opening and closing of the exhaust valve.

[0007] In some embodiments, the heating assembly includes: a heating element and a heating controller;

[0008] The heating element is wound around the liquid inlet pipe, and the heating element is connected to the heating controller.

[0009] In some embodiments, the heating element includes a resistance wire.

[0010] In some embodiments, the liquid level tracking assembly includes: a floating ball and a connecting rod;

[0011] The floating ball is arranged in the liquid storage tank. The rod body of the connecting rod is pivotally connected in the liquid storage tank. One end of the connecting rod is connected to the floating ball, and the other end is connected to the switch of the exhaust valve, so as to drive the switch of the exhaust valve to open the exhaust valve when the floating ball drops below a preset position.

[0012] In some embodiments, the floating ball is a stainless steel hollow ball.

[0013] In some embodiments, the liquid inlet pipe is connected to the bottom of the liquid storage tank.

[0014] In some embodiments, the liquid outlet pipe is connected to the lower side wall of the liquid storage tank.

[0015] In some embodiments, on-off valves are arranged on the liquid inlet pipe and the liquid outlet pipe.

[0016] In some embodiments, the circulating tube type floating ball exhaust device further includes an exhaust pipe and a check valve;

[0017] The exhaust pipe is communicated with the outlet of the exhaust valve, and the check valve is arranged on the exhaust pipe.

[0018] On the other hand, an embodiment of the present application provides a water pipe network for a coalbed methane well, including a network main body and the circulating tube type floating ball exhaust device as described above;

[0019] The liquid inlet pipe and the liquid outlet pipe are respectively connected to the network main body to respectively recover coalbed methane and water.

[0020] The embodiment of the present application has at least the following beneficial effects:

[0021] The circulating tube type floating ball exhaust device and the water pipe network for a coalbed methane well provided by the embodiment of the present application temporarily store the water of the water pipe network for a coalbed methane well in a liquid storage tank, and a heating component is arranged on the water inlet pipe to promote the precipitation of the coalbed methane dissolved in the water, which is collected on the upper layer of the liquid storage tank and discharged through the exhaust valve for recycling. It can reduce the amount of coalbed methane precipitated in the subsequent water pipe network and reduce the risk of deterioration of the sealing performance, flow performance and safety performance caused by excessive pipe network pressure. On the other hand, a liquid level tracking component is also arranged in the liquid storage tank to feedback and control the opening and closing of the exhaust valve. Thus, when the air pressure of the coalbed methane collected at the top of the liquid storage tank causes the liquid level to drop to a preset value, the exhaust valve is controlled to open, and the precipitated coalbed methane is automatically discharged intermittently, realizing efficient and stable coalbed methane collection and discharge operation and reducing the risk of deterioration of the sealing performance and flow performance of the water pipe network. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0023] Figure 1 The structural schematic diagram of the circulating tube type floating ball exhaust device in the embodiment of the present application is shown.

[0024] Reference numerals:

[0025] 1 - water pipe network, 2 - liquid inlet pipe, 21 - liquid inlet control valve, 3 - heating assembly, 4 - liquid level tracking assembly, 41 - floating ball, 42 - connecting rod, 5 - exhaust pipe, 6 - exhaust valve, 7 - liquid storage tank, 8 - liquid outlet pipe, 81 - liquid outlet control valve. Detailed implementation manners

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0027] In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0028] The present application will be described below with reference to the accompanying drawings and specific embodiments:

[0029] The fluid water transported by the water pipe network of the coalbed methane well contains dissolved coalbed methane. When transported in the water pipe network, it is likely to precipitate, resulting in an increase in the pressure inside the water pipe network, thereby increasing the risk of seal failure of the sealing member, and it is also easy to form a slug flow, causing pressure fluctuations as the fluid moves, forming gas blockage, which is not conducive to the stable transportation of the water pipe network.

[0030] For this reason, the embodiments of the present application provide a circulating tube type floating ball exhaust device and a coalbed methane well water pipe network, which only improve to a certain extent the influence of the precipitation of coalbed methane in the fluid of the coalbed methane well water pipe network, resulting in high pressure, and deterioration of sealing performance, fluidity and safety.

[0031] In some embodiments, the circulating tube type floating ball exhaust device may include: a liquid storage tank 7, a liquid inlet pipe 2, a heating assembly 3, a liquid level tracking assembly 4, an exhaust valve 6, and a liquid outlet pipe 8.

[0032] Among them, the liquid storage tank 7 temporarily accommodates the water pumped out from the coalbed methane well and the separated coalbed methane, and can naturally stratify inside the liquid storage tank 7 to form a temporary state with gas on the upper layer and liquid on the lower layer.

[0033] The liquid storage tank 7 can be respectively communicated with the liquid inlet pipe 2 and the liquid outlet pipe 8, and are respectively independently connected to the pipelines of the water pipe network 1, introducing fluid water into the liquid storage tank 7 and discharging the separated coalbed methane, and flowing back to the pipelines inside the water pipe network 1, thereby reducing the gas volume inside the water pipe network 1.

[0034] The heating assembly 3 can be arranged on the liquid inlet pipe 2, capable of raising the temperature of the passing fluid water to a certain extent, promoting the separation of coalbed methane, and naturally stratifying inside the liquid storage tank 7, so as to increase the content of coalbed methane in the fluid water flowing back into the water pipe network 1.

[0035] The liquid level tracking assembly 4 is arranged inside the liquid storage tank 7 and forms a feedback control structure with the exhaust valve, used to control the orderly discharge of the coalbed methane collected at the top of the liquid storage tank 7 for convenient recycling. Specifically, the liquid level tracking assembly 4 can be used as the liquid level tracking and detection structure inside the liquid storage tank 7, real-time monitoring the liquid level change, serving as the basis for controlling the opening and closing of the exhaust valve 6. That is, the liquid level tracking assembly 4 detects the liquid level inside the liquid storage tank 7. When the liquid level drops to the preset value, it means that the separated gas inside the liquid storage tank 7 reaches a certain amount and the air pressure increases, forcing the liquid level to drop to the preset value of the liquid level. The liquid level tracking assembly then controls the opening of the exhaust valve 6, and then the coalbed methane naturally discharges, leaving space to accommodate new coalbed methane.

[0036] The circulating tube type floating ball exhaust device and the coalbed methane well water pipe network provided by the embodiments of the present application store the water of the coalbed methane well water pipe network through the liquid storage tank, and set a heating assembly on the water inlet pipe to promote the separation of the coalbed methane dissolved in the water, which gathers on the upper layer of the liquid storage tank and is discharged through the exhaust valve for recycling. It can reduce the amount of coalbed methane separated in the subsequent water pipe network and reduce the risk of deterioration of the sealing performance, flow performance, and safety performance caused by excessive pipe network pressure. On the other hand, a liquid level tracking assembly is also arranged inside the liquid storage tank and feedback controls the opening and closing of the exhaust valve. Thus, when the air pressure of the coalbed methane gathered at the top of the liquid storage tank forces the liquid level to drop to the preset value, the exhaust valve is controlled to open, automatically and intermittently discharging the separated coalbed methane, realizing efficient and stable coalbed methane gathering and discharging operations, and reducing the risk of deterioration of the sealing performance and flow performance of the water pipe network.

[0037] In some embodiments, the heating assembly 3 is used to heat a section of the pipe body of the water inlet pipe 2, continuously heating the flowing fluid water to promote the precipitation of coalbed methane.

[0038] The heating assembly 3 may include: a heating element and a heating controller; the heating element is wound around the liquid inlet pipe 2, and the heating element is connected to the heating controller to control the temperature of the heating element.

[0039] In some embodiments, the heating element may include a resistance wire, and the current of the resistance wire is controlled by the heating control to achieve temperature control.

[0040] Of course, other types of heating devices can also be used.

[0041] In some embodiments, the liquid level tracking assembly 4 includes: a float 41 and a connecting rod 42; the float 41 can be arranged in the liquid storage tank 7, the rod body of the connecting rod 42 is pivotally connected in the liquid storage tank 7, and one end of the connecting rod 42 is connected to the float 41 and the other end is connected to the switch of the exhaust valve 6, so that when the float 41 drops below a preset position, the switch of the exhaust valve 6 is driven to open the exhaust valve 6.

[0042] That is, by utilizing the characteristic that the float 41 floats on the liquid in the liquid storage tank 7 and moves up and down following the liquid level, when the liquid level in the liquid storage tank 7 drops to a certain extent, it means that the coalbed methane in the upper layer of the liquid storage tank 7 has also accumulated to a certain extent, and the air pressure is large enough to force the liquid level to drop to a certain extent. When it drops to a certain extent, through the lever principle of the connecting rod 42, the switch of the exhaust valve 6 is driven to open to discharge the accumulated coalbed methane.

[0043] Of course, after the coalbed methane with a relatively large air pressure accumulated in the upper part of the inner cavity of the liquid storage tank 7 is quickly discharged, the pressure applied to the fluid water in the liquid storage tank 7 drops rapidly, the liquid level gradually rises, and more fluid water and coalbed methane can be accommodated; at the same time, the switch of the exhaust valve 6 also gradually closes as the float 41 rises. As the coalbed methane continues to accumulate, it waits to trigger the liquid level tracking assembly 4 to control the exhaust valve 6 to open.

[0044] In some embodiments, in order to improve the corrosion resistance, the float 41 can be set as a stainless steel hollow ball. Of course, other corrosion-resistant materials can also be used.

[0045] In some embodiments, the liquid inlet pipe 2 can be connected to the bottom of the liquid storage tank 7 to facilitate reducing the severity of the rise of the fluid liquid level and reducing the severity of the impact on the upper coalbed methane.

[0046] In some embodiments, the liquid outlet pipe 8 may be connected to the lower side wall of the liquid storage tank 7 to form a liquid level difference between the liquid inlet and outlet, which can promote the full dispersion of fluid water and the precipitation of coalbed methane.

[0047] In some embodiments, on-off valves are respectively arranged on the liquid inlet pipe 2 and the liquid outlet pipe 8, namely, a liquid inlet control valve 21 and a liquid outlet control valve 81, to realize the on-off control of the pipeline.

[0048] In some embodiments, in order to balance the stability of exhaust and recycling, the circulating tube type floating ball exhaust device further includes an exhaust pipe 5 and a check valve; the exhaust pipe 5 can be used as a pipeline connecting the recycling device and is communicated with the outlet of the exhaust valve 6, and the check valve is arranged on the exhaust pipe 5 to realize check protection.

[0049] The embodiment of the present application also provides a water pipe network for a coalbed methane well, including a network main body and the circulating tube type floating ball exhaust device as described above; the liquid inlet pipe 2 and the liquid outlet pipe 8 are respectively connected to the network main body to respectively recover coalbed methane and water.

[0050] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but are in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0051] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application.

[0052] It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0053] In this application, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In addition, in this application, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of this application, the meaning of "a plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0056] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0057] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of this application, and the scope of this application is defined by the claims and their equivalents.

Claims

1. A circulating tube type floating ball exhaust device, characterized in that, it includes: a liquid storage tank, a liquid inlet pipe, a heating component, a liquid level tracking component, an exhaust valve and a liquid outlet pipe; The liquid storage tank is respectively communicated with the liquid inlet pipe and the liquid outlet pipe, and the heating component is arranged on the liquid inlet pipe; The exhaust valve is arranged on the liquid storage tank, the liquid level tracking component is arranged in the liquid storage tank, and the liquid level tracking component is connected with the exhaust valve to detect the liquid level in the liquid storage tank through the liquid level tracking component, so as to control the opening and closing of the exhaust valve.

2. The circulating tube type floating ball exhaust device according to claim 1, characterized in that, the heating component includes: a heating element and a heating controller; The heating element is wound around the liquid inlet pipe, and the heating element is connected with the heating controller.

3. The circulating tube type floating ball exhaust device according to claim 1, characterized in that, the heating element includes a resistance wire.

4. The circulating tube type floating ball exhaust device according to claim 1, characterized in that, the liquid level tracking component includes: a floating ball and a connecting rod; The floating ball is arranged in the liquid storage tank, the rod body of the connecting rod is rotatably connected in the liquid storage tank, and one end of the connecting rod is connected with the floating ball and the other end is connected with the switch of the exhaust valve, so as to drive the switch of the exhaust valve to open the exhaust valve when the floating ball drops below a preset position.

5. The circulating tube type floating ball exhaust device according to claim 4, characterized in that, the floating ball is a stainless steel hollow ball.

6. The circulating tube type floating ball exhaust device according to claim 1, characterized in that, the liquid inlet pipe is connected to the bottom of the liquid storage tank.

7. The circulating tube type floating ball exhaust device according to claim 6, characterized in that, the liquid outlet pipe is connected to the lower side wall of the liquid storage tank.

8. The circulating tube type floating ball exhaust device according to claim 7, characterized in that, switch valves are arranged on the liquid inlet pipe and the liquid outlet pipe.

9. The circulating tube type floating ball exhaust device according to any one of claims 1 to 8, characterized in that, the circulating tube type floating ball exhaust device further includes an exhaust pipe and a one-way valve; The exhaust pipe is communicated with the outlet of the exhaust valve, and the one-way valve is arranged on the exhaust pipe.

10. A coalbed methane well water pipe network, characterized in that, it includes a pipe network main body and the circulating tube type floating ball exhaust device according to any one of claims 1 to 9; The liquid inlet pipe and the liquid outlet pipe are respectively connected with the pipe network main body to respectively recover coalbed methane and water.

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