A natural gas delivery system

Abstract

The utility model relates to a natural gas equipment field, concretely relates to a natural gas conveying system, include: the separator, the top of separator is connected with the air intake main pipe, is equipped with the mist catcher mechanism at the air intake main pipe and separator junction, the mist catcher mechanism is used for separating the water drop in the gas of entering the air intake main pipe, the air intake main pipe is detachably connected with the bubble breaking device, the bubble breaking device outer wall and air intake main pipe inner wall are pasted, the bubble breaking device is located in the downstream direction of mist catcher mechanism, the bubble breaking device is used for eliminating the air bubble in the air intake main pipe, the outer wall of this bubble breaking device and the inner wall of air intake main pipe are pasted, make the water bubble that is affected by natural gas and floats upwards can be punctured after contacting with the bubble breaking device, reduce the liquid with water bubble entering subsequent processing device, the liquid level in subsequent processing device is reduced simultaneously, reduce the frequent turnover of subsequent processing equipment and equipment shutdown and other failures caused by the abnormal liquid level in subsequent processing equipment, ensure the stability of natural gas conveying.

Description

Technical Field

[0001] This utility model relates to the field of natural gas equipment, and in particular to a natural gas transmission system. Background Technology

[0002] During the production process of a natural gas platform, maintaining appropriate gas pressure within the wellbore is necessary to ensure normal gas production. However, in actual operating conditions, gas wells often face problems such as increased fluid accumulation at the bottom of the well and insufficient gas pressure. Excessive fluid accumulation significantly inhibits normal gas flow, leading to liquid blockage, increased bottom pressure, and a sharp decline in gas production, which can even cause well shutdown in severe cases.

[0003] To drain accumulated fluid from the wellbore and restore its unobstructed flow, foam drainage gas production is currently widely used. This involves adding a foaming agent to the gas well, which mixes with the wellbore fluid to create bubbles. The buoyancy of the natural gas carries these bubbles to the surface. This method improves the well's drainage capacity to some extent and is particularly suitable for mid-to-late-stage wells with insufficient pressure and poor self-draining capabilities.

[0004] However, large-scale foam drainage gas extraction has gradually revealed serious problems affecting the operation of the gathering and transmission system. When water bubbles enter the surface system, they need to undergo gas-liquid separation in a natural gas separator. Chemical defoaming methods (such as adding liquid or solid defoamers) are often used for defoaming, but the mixing of water bubbles and defoamers takes time. Some water bubbles that are not fully mixed still contain foaming agent components after entering the separator, and are prone to secondary foaming due to gas disturbance. Such residual foam enters the subsequent processing unit with the natural gas, and after bursting in the unit, it causes a large amount of water accumulation, which can easily lead to abnormal liquid levels in the equipment, frequent tower overturning, and equipment shutdowns. Utility Model Content

[0005] The purpose of this invention is to overcome the problem in the existing technology of foam drainage gas extraction, where residual water bubbles in the natural gas separator cause secondary foaming due to incomplete dissolution of the foaming agent, resulting in water bubbles entering the subsequent processing device with the natural gas, causing water accumulation in the subsequent processing device, thereby leading to abnormal liquid level and insufficient equipment malfunction, and to provide a natural gas transmission system.

[0006] In a first aspect, the present invention provides a natural gas transmission system, comprising: a separator, wherein the top of the separator is connected to an inlet main pipe, and a mist-collecting mechanism is provided at the connection between the inlet main pipe and the separator;

[0007] A bubble-breaking device is detachably connected inside the intake manifold. The outer wall of the bubble-breaking device is in contact with the inner wall of the intake manifold. The bubble-breaking device is located downstream of the mist-catching mechanism and is used to eliminate air bubbles inside the intake manifold.

[0008] This utility model provides a natural gas transportation system. An inlet pipe is installed at the top of the separator, and a mist-catching mechanism is installed at the connection between the inlet pipe and the separator. When gas carrying water vapor passes through the mist-catching mechanism, the contact area between the water-vapor-laden natural gas and the entire structure is increased, allowing the water vapor to condense into water droplets on the mist-catching mechanism. Over time, the condensed water droplets drip into the separator due to their own gravity. The inlet pipe also contains a bubble-breaking device. The outer wall of the bubble-breaking device is fitted to the inner wall of the inlet pipe, allowing water bubbles rising due to the influence of natural gas to be punctured upon contact with the bubble-breaking device. This reduces the amount of liquid entering the subsequent processing equipment along with the water bubbles, simultaneously lowering the liquid level in the subsequent processing equipment. This reduces frequent tower flips and equipment shutdowns caused by abnormal liquid levels in the subsequent processing equipment, ensuring the stability of natural gas transportation.

[0009] Preferably, the bubble-breaking device includes a support, a first bubble-breaking net is sleeved on the outside of the support, and a second bubble-breaking net is sleeved on the outside of the first bubble-breaking net.

[0010] By using a support structure for the bubble-breaking device and installing a first bubble-breaking net and a second bubble-breaking net outside the support, a multi-layer bubble-breaking structure is formed by the first bubble-breaking net and the second bubble-breaking net, thereby improving the efficiency of bubble breaking.

[0011] Preferably, both the first defoaming mesh and the second defoaming mesh are made of fibrous material.

[0012] The first and second bubble-breaking nets are constructed from fiber materials. Due to the structural characteristics of the fiber materials themselves, there are a large number of interfaces between fibers and between fibers and air. When the bubbles come into contact with the first and second bubble-breaking nets, the contact area between the bubbles and each bubble-breaking net is increased through the pores between the fibers, thereby reducing the number of bubbles that enter the subsequent processing device through the air intake pipe.

[0013] Preferably, both the first and second bubble-breaking nets are arranged in a structure with irregular pores.

[0014] Preferably, the first bubble-breaking net is non-woven fabric, and the second bubble-breaking net is filter cotton.

[0015] By setting non-woven fabric and filter cotton as the first and second bubble-breaking nets, the non-woven fabric and filter cotton are flexible materials with rougher surfaces compared to metal structures, allowing bubbles to be punctured by their rough surfaces upon contact. Furthermore, both the non-woven fabric and filter cotton are hydrophilic, enabling them to absorb some liquid while breaking bubbles, thus reducing the liquid content in the natural gas transported to subsequent processing devices.

[0016] Preferably, the natural gas transmission system further includes a filter located downstream of the separator, with one end of the filter connected to the main gas inlet pipe.

[0017] Preferably, the intake manifold is provided with a pair of support frames, and the two support frames form a receiving chamber for placing the bubble breaking device.

[0018] The two support structures form a housing that facilitates the installation and replacement of the bubble-breaking device, improving the modularity of the assembly and the ease of maintenance. Simultaneously, the support frame positions and limits the bubble-breaking device, ensuring its stability and preventing displacement during gas flow, thus helping to maintain its alignment with the airflow direction and improving bubble-breaking efficiency.

[0019] Preferably, the support frame is connected to the inner wall of the intake manifold.

[0020] Preferably, the intake manifold is provided with a first valve and a second valve, the first valve being located between the separator and the defoaming device, and the second valve being located between the defoaming device and the filter.

[0021] Preferably, the intake manifold is further provided with a differential pressure gauge, the differential pressure gauge is provided with a first pressure tap and a second pressure tap, one end of the first pressure tap is connected to the differential pressure gauge and the other end is connected to the intake manifold; one end of the second pressure tap is connected to the differential pressure gauge and the other end is connected to the intake manifold.

[0022] By setting a differential pressure gauge, on-site personnel can easily check whether the bubble-breaking device is blocked by the value displayed on the gauge.

[0023] Preferably, the intake main pipe is connected to a bypass line, the bypass line includes an intake end located upstream of the connection between the first pressure pipe and the intake main pipe; the bypass line also includes an exhaust end located downstream of the connection between the second pressure pipe and the intake main pipe.

[0024] By setting up a bypass pipeline, when the defoaming device becomes clogged and needs to be replaced, the bypass pipeline can be used as a temporary pipeline to transport natural gas while the first and second valves are closed to replace the defoaming device, thus improving the production efficiency of natural gas.

[0025] Preferably, the bypass pipeline is also equipped with a third valve and a fourth valve.

[0026] Used to control the opening and closing of the bypass line. The bypass line is opened when the defoaming device needs to be replaced, and closed when the defoaming device is replaced.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] 1. This utility model provides a natural gas transportation system. An inlet pipe is installed at the top of the separator, and a mist-catching mechanism is installed at the connection between the inlet pipe and the separator. When gas carrying water vapor passes through the mist-catching mechanism, the contact area between the water-vapor-laden natural gas and the entire structure is increased, allowing the water vapor to condense into water droplets on the mist-catching mechanism. Over time, the condensed water droplets drip into the separator due to their own gravity. The inlet pipe also contains a bubble-breaking device. The outer wall of the bubble-breaking device is fitted to the inner wall of the inlet pipe, allowing water bubbles rising due to the influence of natural gas to be punctured upon contact with the bubble-breaking device. This reduces the amount of liquid entering the subsequent processing equipment along with the water bubbles, simultaneously lowering the liquid level in the subsequent processing equipment. This reduces frequent tower flips and equipment shutdowns caused by abnormal liquid levels in the subsequent processing equipment, ensuring the stability of natural gas transportation.

[0029] 2. This utility model provides a natural gas transmission system. By installing a first valve, a second valve, and a differential pressure gauge on the main intake pipe, on-site personnel can determine whether the defoaming device is blocked and needs replacement by using the value displayed on the differential pressure gauge. A bypass pipeline is also provided on the main intake pipe, and the bypass pipeline has a third valve and a fourth valve to control its opening and closing. When the defoaming device needs to be replaced, the first valve and the second valve close the main intake pipe to replace the defoaming device. During the replacement, the third valve and the fourth valve are opened to allow natural gas to be transported through the bypass pipeline, thereby improving work efficiency. Attached Figure Description

[0030] Figure 1 This is a structural diagram of the natural gas transmission system of this utility model without the filter connected;

[0031] Figure 2 In this utility model Figure 1 Enlarged view of point A;

[0032] Figure 3 In this utility model Figure 1 Enlarged view of point B;

[0033] Figure 4 This is a schematic diagram of the various valves in the natural gas transmission system of this utility model;

[0034] Figure 5 This is a schematic diagram showing the connection between the main intake pipe, bypass pipeline and various pressure taps in the natural gas transmission system of this utility model;

[0035] Figure 6 This is a cross-sectional view of the bubble-breaking device of this utility model;

[0036] Figure 7 This is a schematic diagram showing the location of the receiving chamber in the main intake pipe of this utility model;

[0037] Figure 8 This is a structural diagram of the bracket of this utility model;

[0038] Figure 9 This is a schematic diagram of the natural gas transmission path of the natural gas transmission system of this utility model.

[0039] The markings in the diagram are: 1-Separator; 2-Intake main pipe; 21-Support frame; 22-Containing chamber; 23-First valve; 24-Second valve; 3-Mist catching mechanism; 4-Bubble breaking device; 41-Bracket; 42-First bubble breaking screen; 43-Second bubble breaking screen; 5-Filter; 6-Differential pressure gauge; 7-First pressure tap; 8-Second pressure tap; 9-Bypass line; 91-Intake end; 92-Exhaust end; 93-Third valve; 94-Fourth valve. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0041] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0042] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0043] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0044] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0045] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0046] Example 1

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8As shown, a natural gas transmission system includes a separator 1, with an inlet pipe 2 at the top of the separator 1. A mist-catching mechanism 3 is provided at the connection between the inlet pipe 2 and the separator 1. The mist-catching mechanism 3 is provided so that the natural gas carrying liquid comes into contact with the mist-catching mechanism 3 during its ascent, causing condensation and stripping away some of the liquid from the natural gas. Over time, water droplets form on the mist-catching mechanism 3, and the water droplets fall into the separator 1 by their own gravity, reducing the liquid content in the natural gas. The inlet pipe 2 is also provided with a defoaming device 4, which is located downstream of the mist-catching mechanism 3.

[0048] Furthermore, the defoaming device 4 includes a support 41 connected to the inner wall of the intake pipe 2. A first defoaming net 42 is sleeved on the outside of the support 41, and a second defoaming net 43 is sleeved on the outside of the first defoaming net 42. Both the first defoaming net 42 and the second defoaming net 43 are made of fiber material. When gas that has not been sufficiently defoamed and carries foaming agent enters the separator 1, gas-liquid separation occurs in the separator 1. However, as the gas is agitated in the separator 1, it will generate bubbles again, forming water bubbles that enter the intake pipe 2 with the natural gas. When natural gas comes into contact with the first bubble-breaking net 42 and the second bubble-breaking net 43, the first bubble-breaking net 42 and the second bubble-breaking net 43 are made of fiber material. Due to the structural characteristics of the fiber material itself, there are a large number of fiber-to-fiber and fiber-to-air interfaces inside. When the water bubbles come into contact with the first bubble-breaking net 42 and the second bubble-breaking net 43, the contact area between the water bubbles and each bubble-breaking net is increased through the pores between the fibers, thereby improving the bubble-breaking efficiency and reducing the number of water bubbles entering the subsequent processing device through the main air intake duct 2.

[0049] In one or more embodiments, the first bubble-breaking net 42 is non-woven fabric, and the second bubble-breaking net 43 is filter cotton. Compared with traditional metal structures, the bubble-breaking efficiency is higher. Specifically, both the non-woven fabric and the filter cotton are flexible materials. Compared with traditional metal structures, the surfaces of the non-woven fabric and the filter cotton have a higher roughness. When passing through the non-woven fabric (first bubble-breaking net 42), the bubbles first come into contact with the rough surface of the non-woven fabric. Since the non-woven fabric is made of interwoven fibers, its surface has a large number of tiny protrusions and pores. These structures can effectively puncture the surface tension membrane of the bubbles. When bubbles are subjected to external force, the gas inside them is released, thus achieving a preliminary bubble-breaking effect. Subsequently, the natural gas carrying residual water bubbles comes into contact with the second bubble-breaking net 43 (filter cotton). Since the filter cotton also has a flexible and coarse fiber structure, it can undergo secondary bubble breaking when the water bubbles come into contact with the filter cotton, which improves the bubble-breaking efficiency and reduces the number of water bubbles in the natural gas. In addition, both the non-woven fabric and the filter cotton are hydrophilic, and after the bubbles are broken, they can absorb the liquid components in the water bubbles, so that the liquid components are temporarily stored in their own internal structure, reducing the liquid content in the natural gas transported to the subsequent processing unit after passing through the bubble-breaking system.

[0050] In one or more embodiments, the natural gas transmission system with gas-liquid separation further includes a filter 5, which is located downstream of the separator 1, and one end of the filter 5 is connected to the main gas inlet pipe 2, such as... Figure 9 As shown.

[0051] In one or more embodiments, the intake manifold 2 is provided with a pair of support frames 21, and a receiving chamber 22 is formed between the two support frames 21. The receiving chamber 22 is used to house the bubble-breaking device 4. The receiving chamber 22 formed by the two support frames 21 facilitates the installation and replacement of the bubble-breaking device 4, improving the modularity of the assembly and the convenience of maintenance. At the same time, the support frames 21 position and limit the bubble-breaking device 4, ensuring that the bubble-breaking device 4 is stable and does not shift during gas flow, helping to keep it consistent with the airflow direction and improving the bubble-breaking efficiency.

[0052] Optionally, the support frame 21 is connected to the inner wall of the intake manifold 2 by spot welding, such as... Figure 7 As shown.

[0053] In one or more embodiments, the intake manifold 2 is provided with a first valve 23 and a second valve 24, the first valve 23 being located between the separator 1 and the defoaming device 4, and the second valve 24 being located between the defoaming device 4 and the filter 5;

[0054] Furthermore, the intake manifold 2 is also equipped with a differential pressure gauge 6, which has a first pressure tap 7 and a second pressure tap 8. One end of the first pressure tap 7 is connected to the differential pressure gauge 6, and the other end is connected to the intake manifold 2; one end of the second pressure tap 8 is connected to the differential pressure gauge 6, and the other end is connected to the intake manifold 2. By setting up the differential pressure gauge 6, on-site personnel can easily check whether the bubble-breaking device 4 is blocked by the value displayed on the differential pressure gauge 6. Figure 1 and Figure 4 As shown.

[0055] In one or more embodiments, a bypass line 9 is connected to the main intake pipe 2. The bypass line 9 includes an intake end 91, located upstream of the connection between the first pressure tap 7 and the main intake pipe 2. The bypass line 9 also includes an exhaust end 92, located downstream of the connection between the second pressure tap 8 and the main intake pipe 2. By providing the bypass line 9, when the defoaming device 4 becomes clogged and needs replacement, the bypass line 9 can be used as a temporary pipeline for natural gas transportation while the first valve 23 and the second valve 24 are closed to replace the defoaming device 4. This improves the production efficiency of natural gas. Figure 1 , Figure 4 and Figure 5 As shown.

[0056] In one or more embodiments, the bypass line 9 is further provided with a third valve 93 and a fourth valve 94 for controlling the opening and closing of the bypass line 9. The bypass line 9 is opened when the defoaming device 4 needs to be replaced, and closed after the defoaming device 4 has been replaced. Figure 4 As shown.

[0057] In this utility model, the section of the main intake pipe 2 that houses the bubble-breaking device 4 is a detachable structure. Specifically, flanges are provided at both ends of the pipe used to install the bubble-breaking device 4. The pipe can be disassembled and replaced through the flanges. When the pipe needs to be disassembled to replace the bubble-breaking device 4, the operator closes the first valve 23 and the second valve 24 until the pipe to be replaced is in a safe state. The pipe is then disassembled through the flanges. Since the support frame 21 is spot-welded to the inner wall of the pipe, the operator can replace the bubble-breaking device 4 by knocking off the support frame 21. After the replacement is completed, the support frame 21 is spot-welded again, and the pipe is installed.

[0058] Furthermore, in this utility model, the support frame 21 is cross-shaped.

[0059] In one or more embodiments, the fog-catching mechanism 3 is a fog-catching net.

[0060] The working process of the natural gas transmission system in this utility model is as follows: The liquid containing a foaming agent in the separator 1 is agitated by the gas to generate bubbles. These bubbles rise with the natural gas and come into contact with the mist-catching mechanism 3. Larger bubbles burst or are adsorbed into the mesh of the mist-catching mechanism 3 (the mist-catching mechanism 3 is a metal structure with a smooth surface). Under the action of the natural gas, the bubbles adsorbed in the mesh of the mist-catching mechanism 3 pass through the mist-catching mechanism 3 and enter the main intake pipe 2 (the third valve 93 and the fourth valve 94 on the bypass pipeline 9 are closed). The first valve 23 and the second valve 24 are opened, allowing the natural gas carrying the bubbles to come into contact with the bubble-breaking device 4. Because the bubble-breaking device 4 is made of fiber material (non-woven fabric and filter cotton), its surface is rougher than that of a metal structure, which can improve the bubble-breaking rate. After the natural gas completes the bubble breaking, it enters the filter 5 through the main intake pipe 2 (the transmission path of the main intake pipe 2 is...). Figure 9 (The direction the solid black arrow points to);

[0061] When the defoaming device 4 needs to be replaced on site, close the first valve 23 and the second valve 24 and open the third valve 93 and the fourth valve 94 so that natural gas can be transported through the bypass pipeline 9 when the defoaming device 4 is being replaced on site.

[0062] Furthermore, the diameter of the bypass pipeline 9 is smaller than that of the main gas inlet pipe 2, and the time required to replace the defoaming device 4 on-site is short. Therefore, when transporting natural gas through the bypass pipeline 9, a large amount of water bubbles will not be sent to the subsequent treatment unit, preventing water accumulation and overturning of the subsequent treatment unit (the transport path of the bypass pipeline 9 is...). Figure 9 (The direction the black hollow arrow points).

[0063] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A natural gas transmission system, characterized in that, include: A separator (1) is provided with an air intake pipe (2) connected to the top of the separator (1), and a mist-catching mechanism (3) is provided at the connection between the air intake pipe (2) and the separator (1). A bubble-breaking device (4) is detachably connected inside the intake pipe (2). The outer wall of the bubble-breaking device (4) is attached to the inner wall of the intake pipe (2). The bubble-breaking device (4) is located downstream of the mist-catching mechanism (3). The bubble-breaking device (4) is used to eliminate bubbles in the intake pipe (2).

2. A natural gas transmission system according to claim 1, characterized in that, The bubble-breaking device (4) includes a support (41), a first bubble-breaking net (42) is sleeved on the outside of the support (41), and a second bubble-breaking net (43) is sleeved on the outside of the first bubble-breaking net (42).

3. A natural gas transmission system according to claim 2, characterized in that, Both the first defoaming mesh (42) and the second defoaming mesh (43) are made of fibrous material.

4. A natural gas transmission system according to claim 3, characterized in that, Both the first debubbling mesh (42) and the second debubbling mesh (43) are arranged in an irregular pore structure.

5. A natural gas transmission system according to any one of claims 1-4, characterized in that, The natural gas transmission system also includes a filter (5), which is located downstream of the separator (1), and one end of the filter (5) is connected to the main intake pipe (2).

6. A natural gas transmission system according to claim 5, characterized in that, The intake manifold (2) is provided with a pair of support frames (21), and the two support frames (21) form a receiving chamber (22), which is used to place the bubble breaking device (4).

7. A natural gas transmission system according to claim 6, characterized in that, The intake manifold (2) is provided with a first valve (23) and a second valve (24). The first valve (23) is located between the separator (1) and the defoaming device (4), and the second valve (24) is located between the defoaming device (4) and the filter (5).

8. A natural gas transmission system according to claim 7, characterized in that, The intake manifold (2) is also equipped with a differential pressure gauge (6), which has a first pressure tap (7) and a second pressure tap (8). One end of the first pressure tap (7) is connected to the differential pressure gauge (6) and the other end is connected to the intake manifold (2). One end of the second pressure tap (8) is connected to the differential pressure gauge (6) and the other end is connected to the intake manifold (2).

9. A natural gas transmission system according to claim 8, characterized in that, The intake main pipe (2) is connected to a bypass pipe (9), which includes an intake end (91) located upstream of the connection between the first pressure pipe (7) and the intake main pipe (2); the bypass pipe (9) also includes an exhaust end (92) located downstream of the connection between the second pressure pipe (8) and the intake main pipe (2).

10. A natural gas transmission system according to claim 9, characterized in that, The bypass pipeline (9) is also equipped with a third valve (93) and a fourth valve (94).

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