An integrated gathering, transportation and processing skid-mounted system for high and low pressure shale gas distribution

Abstract

The present invention discloses an integrated gathering, transportation and processing skid-mounted system for high- and low-pressure shale gas distribution and transmission, comprising a two-phase flowmeter skid-mounted subsystem, a first separator skid-mounted subsystem and a second separator skid-mounted subsystem arranged in sequence; the two-phase flowmeter skid-mounted subsystem comprises a two-phase flowmeter skid, and a plurality of first air inlet pipes, a first manifold and a second manifold installed on the two-phase flowmeter skid; the first separator skid-mounted subsystem comprises a first separator skid, and a second air inlet pipe installed on the first separator skid; the second separator skid-mounted subsystem comprises a second separator skid, and a second separator installed on the second separator skid. The beneficial effects of the present invention are as follows: the present invention integrates the two-phase metering skid-mounted subsystem, the first separator skid-mounted subsystem and the second separator skid-mounted subsystem into one, which can complete the gas-liquid two-phase metering, gas-liquid separation and high- and low-pressure distribution and transmission of shale gas; this structural design has highly integrated functions and a simple and compact structure.

Description

Technical Field

[0001] The present invention relates to the technical field of shale gas gathering, transportation and processing, and in particular to an integrated gathering, transportation and processing skid-mounted system for the separate transportation of high- and low-pressure shale gas. Background Art

[0002] Shale gas field development is characterized by low single-well production, rapid and inconsistent pressure decay, long development cycles, and multiple rounds of development. Shale gas gathering, transportation, and processing are crucial components of shale gas field development. Currently, shale gas gathering, transportation, and processing equipment is diverse and monolithic, primarily consisting of metering equipment and separators. These devices are installed on separate skids, resulting in numerous pipeline connections between the skids, heavy welding and inspection workloads, and long construction cycles. Furthermore, the skids are numerous in type, and the skid-mounted equipment is dispersed, occupying a large area and incurring high land acquisition costs.

[0003] Moreover, with the rolling development of shale gas fields, the number of shale gas wells on the same platform has gradually increased, and inconsistent pressures have generally occurred in gas wells. The functionality and adaptability of existing skid-mounted equipment for gathering and transportation of shale gas fields are not strong, and the function of high- and low-pressure shale gas separation is imperfect. It is only suitable for gas wells with consistent pressure and pressure attenuation. When the pressure attenuation is inconsistent and the pressure of some gas wells is lower than the external transmission pressure, they cannot enter the multi-well gathering and transportation system, and the separation of high- and low-pressure gas wells cannot be achieved, which affects the production of low-pressure gas wells.

[0004] Therefore, it is necessary to improve the existing technology. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies of the existing technology and provide an integrated gathering and processing skid-mounted system for high and low pressure shale gas separation and transportation with a compact structure and a small footprint.

[0006] The technical solution adopted by the present invention is: a shale gas integrated gathering, transportation and processing skid-mounted system, comprising a two-phase flow meter skid-mounted subsystem, a first separator skid-mounted subsystem and a second separator skid-mounted subsystem arranged in sequence;

[0007] The two-phase flowmeter skid-mounted subsystem includes: a two-phase flowmeter skid, and a plurality of first air inlet pipes, a first manifold, and a second manifold mounted on the two-phase flowmeter skid. The first air inlet pipe is provided with a two-phase flowmeter. One end of the first air inlet pipe is connected to a wellhead gas production line, and the other end of the first air inlet pipe is connected to the first manifold and the second manifold, respectively.

[0008] The first separator skid-mounted subsystem includes a first separator skid, and a second air intake duct, a first separator, a third manifold, and a fourth manifold mounted on the first separator skid; the inlet of the second air intake duct is connected to the first manifold, and the outlet of the second air intake duct is connected to the inlet of the first separator; the outlet of the first separator is connected to the third manifold and the fourth manifold respectively;

[0009] The second separator skid-mounted subsystem includes a second separator skid, and a second separator, a third air intake duct, a fifth manifold, and a sixth manifold mounted on the second separator skid. The inlet of the third air intake duct is connected to the second manifold via a connecting duct provided on the second separator skid, the outlet of the third air intake duct is connected to the inlet of the second separator, and the outlet of the second separator is connected to the fifth manifold and the sixth manifold, respectively.

[0010] The two-phase flow meter skid, the first separator skid and the second separator skid are arranged in sequence, and two adjacent skids are connected by bolts; the third manifold is connected to the fifth manifold; and the fourth manifold is connected to the sixth manifold.

[0011] According to the above solution, a third branch pipe and a fourth branch pipe are further provided on the two-phase flowmeter skid. The outlet of the first air inlet pipe is connected to the first manifold through the first branch pipe, and a first gate valve is provided on the first branch pipe.

[0012] According to the above solution, the outlet of the first air inlet pipe is connected to the second manifold through the second branch pipe, and the second branch pipe is provided with a second gate valve.

[0013] According to the above solution, the interfaces of the first air inlet pipe, the first manifold and the second manifold are arranged on the side of the two-phase flowmeter skid, and flanges are respectively installed at the interfaces of the three pipes.

[0014] According to the above solution, the outlet of the first separator is connected to the third manifold through a third branch pipe, and a third gate valve is arranged on the third branch pipe.

[0015] According to the above solution, the outlet of the first separator is connected to the fourth manifold through the fourth branch pipe, and the fourth branch pipe is provided with a fourth gate valve.

[0016] According to the above solution, the interfaces of the connecting pipe, the second air intake pipe, the third manifold and the fourth manifold are arranged on the side of the first separator skid, and the interfaces of each pipe are installed with a flange, and each pipe is connected to the pipes on other skids through the flange.

[0017] According to the above solution, the second separator skid seat is further provided with a fifth branch pipe and a sixth branch pipe; the outlet of the second separator is connected to the sixth manifold through the fifth branch pipe, and the outlet of the second separator is connected to the fifth manifold through the sixth branch pipe.

[0018] According to the above solution, the interfaces of the air intake pipe, the fifth manifold and the sixth manifold are arranged on the side of the second separator skid, and each pipe interface is provided with a flange.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention integrates a two-phase metering skid-mounted subsystem, a first separator skid-mounted subsystem, and a second separator skid-mounted subsystem into one. Two adjacent skids are connected by bolts, and related pipelines are assembled by flange connections. When shale gas extraction and processing is required, the present invention is installed at a preset position in the gas gathering station, and then the air inlet pipes of the two-phase flowmeter skid are connected to the gas extraction pipes at the shale gas wellhead. This can complete the gas-liquid two-phase metering and gas-liquid separation of shale gas. This structural design has highly integrated functions, a simple and compact structure, reduced floor space, easy assembly, reduced on-site pipeline connection construction workload, and lowered investment.

[0021] 2. In view of the different pressure conditions at the wellheads of different shale gas wells, the present invention designs two sets of separator skid-mounted subsystems for high- and low-pressure separation and transportation of shale gas. When the wellheads of the gas wells are both under high-pressure conditions, the first separator skid-mounted subsystem and the second separator skid-mounted subsystem can simultaneously process high-pressure shale gas; when high- and low-pressure conditions occur at the wellheads of the gas wells, the first separator skid-mounted subsystem and the second separator skid-mounted subsystem can be used to process high-pressure and low-pressure shale gas respectively, completing the high- and low-pressure separation and transportation of shale gas. This structural design is flexible and reliable, and adapts to the development and production characteristics of shale gas fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the present invention.

[0023] Figure 2 This is a simplified structural diagram of this embodiment (the sewage discharge pipeline, liquid discharge pipeline and vent pipeline are not shown in the figure).

[0024] Figure 3 This is a schematic diagram of the skid and seat structure of the two-phase flow meter in this embodiment.

[0025] Figure 4 In this embodiment Figure 3 AA cross-sectional view.

[0026] Figure 5 This is a schematic diagram of the structure of the first separator pry and pry seat in this embodiment.

[0027] Figure 6 In this embodiment Figure 5 BB cross-sectional view.

[0028] Figure 7 This is a schematic diagram of the structure of the second separator pry and pry seat in this embodiment.

[0029] Figure 8 In this embodiment Figure 7 CC cross-sectional view.

[0030] 1. Two-phase flowmeter skid-mounted subsystem; 101. First air inlet pipe; 102. Two-phase flowmeter; 103. First branch pipe; 104. Second branch pipe; 105. First gate valve; 106. Second gate valve; 107. First manifold; 108. Second manifold; 109. Two-phase flowmeter skid; 2. First separator skid-mounted subsystem; 201. First separator; 202. Third branch pipe; 203. Fourth branch pipe; 204. Third gate valve; 205. Fourth gate valve; 206. Second air inlet pipe; 207. Third manifold; 208. Fourth manifold; 209. Connecting pipe; 210. First separator skid; 211. First steam trap ; 212. First sewage discharge pipeline; 213. First automatic liquid discharge pipeline; 214. First vent pipeline; 3. Second separator skid-mounted subsystem; 301. Second separator; 302. Fifth branch pipe; 303. Sixth branch pipe; 304. Fifth gate valve; 305. Sixth gate valve; 306. Third air inlet pipe; 307. Fifth manifold; 308. Sixth manifold; 309. Second separator skid seat; 310 Second steam trap; 311. Second sewage discharge pipeline; 312. Second automatic liquid discharge pipeline; 313. Second vent pipeline; 4. Flange; 5. Main crossbeam; 6. Main longitudinal beam; 7. Steel plate; 8. Secondary crossbeam; 9. Secondary longitudinal beam; 10. Bracket. DETAILED DESCRIPTION

[0031] In order to better understand the present invention, the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 The integrated gathering and processing skid-mounted system for high and low pressure shale gas separation and transportation shown in FIG comprises a two-phase flow meter skid-mounted subsystem 1, a first separator skid-mounted subsystem 2, and a second separator skid-mounted subsystem 3 arranged in sequence, as shown in FIG. Figure 1 As shown;

[0033] The two-phase flowmeter skid-mounted subsystem 1 includes: a two-phase flowmeter skid 109, and a plurality of first air inlet pipes 101, a first manifold 107, and a second manifold 108 mounted on the two-phase flowmeter skid 109. The first air inlet pipe 101 is provided with a two-phase flowmeter 102. One end of the first air inlet pipe 101 is connected to a wellhead gas production line, and the other end of the first air inlet pipe 101 is connected to the first manifold 107 and the second manifold 108, respectively.

[0034] The first separator skid-mounted subsystem 2 includes a first separator skid 210, a second air inlet duct 206, a first separator 201, a third manifold 207, and a fourth manifold 208 mounted on the first separator skid 209. The inlet of the second air inlet duct 206 communicates with the first manifold 107, and the outlet of the second air inlet duct 206 communicates with the inlet of the first separator 201. The outlet of the first separator 201 communicates with the third manifold 207 and the fourth manifold 208, respectively.

[0035] The second separator skid-mounted subsystem 3 includes a second separator skid 309, a second separator 301, a third air intake duct 306, a fifth manifold 307, and a sixth manifold 308 mounted on the second separator skid 309. The inlet of the third air intake duct 306 is connected to the second manifold 108 via a connecting duct 209 provided on the second separator skid 309. The outlet of the third air intake duct 306 is connected to the inlet of the second separator 301. The outlet of the second separator 301 is connected to the fifth manifold 307 and the sixth manifold 308, respectively.

[0036] The two-phase flowmeter skid 109, the first separator skid 210 and the second separator skid 309 are arranged in sequence, and two adjacent skids are fixed with bolts; the third manifold 207 is connected to the fifth manifold 307; the fourth manifold 208 is connected to the sixth manifold 308.

[0037] In the present invention, the two-phase flow meter skid 109, the first separator skid 210 and the second separator skid 309 have the same structure. Figures 3 to 8 As shown, each includes several main crossbeams 5, several main longitudinal beams 6, several secondary crossbeams 8, several secondary longitudinal beams 9, and steel plates 7. The main crossbeams 5, secondary crossbeams 8, main longitudinal beams 6, and secondary longitudinal beams 9 are spaced apart and connected to form a skeleton, with the steel plates 7 mounted on the upper portion of the skeleton. The main crossbeams 5 and main longitudinal beams 6 can be made of channel steel, while the secondary crossbeams 8 and secondary longitudinal beams 9 can be made of H-shaped steel. Brackets 10 for supporting the separators are provided on the first separator skid 210 and the second separator skid 309, respectively.

[0038] In the two-phase flowmeter skid-mounted subsystem 1, a third branch pipe 202 and a fourth branch pipe 203 are further provided on the two-phase flowmeter skid base 109. The outlet of the first air inlet pipe 101 is connected to the first manifold 107 through the first branch pipe 103, and the first branch pipe 103 is provided with a first gate valve 105; the outlet of the first air inlet pipe 101 is connected to the second manifold 108 through the second branch pipe 104, and the second branch pipe 104 is provided with a second gate valve 106.

[0039] Preferably, the interfaces of the first air inlet pipe 101 , the first manifold 107 and the second manifold 108 are arranged on the side of the two-phase flow meter skid 109 , and flanges 4 are respectively installed at the interfaces of the three pipes.

[0040] In the first separator skid-mounted subsystem 2, a third branch pipe 202, a fourth branch pipe 203, a third manifold 207, a fourth manifold 208 and a connecting pipe 209 are also installed on the first separator skid base 210; the outlet of the first separator 201 is connected to the third manifold 207 through the third branch pipe 202, and a third gate valve 204 is configured on the third branch 202; the outlet of the first separator 201 is connected to the fourth manifold 208 through the fourth branch pipe 203, and a fourth gate valve 205 is configured on the fourth branch 203.

[0041] Preferably, the interfaces of the connecting pipe 209, the second air intake pipe 206, the third manifold 207 and the fourth manifold 208 are arranged on the side of the first separator skid 210, and the interface of each pipe is installed with a flange 4, and each pipe is connected to the pipes on other skids through the flange 4 (such as the second air intake pipe 206 and the first manifold 107 are connected through the flange at the end).

[0042] In the second separator skid-mounted subsystem 3 , a fifth branch pipe 302 and a sixth branch pipe 303 are further provided on the second separator skid seat 309 ; the outlet of the second separator 301 is connected to the sixth manifold 308 through the fifth branch pipe 302 , and the outlet of the second separator 301 is connected to the fifth manifold 307 through the sixth branch pipe 303 .

[0043] Preferably, the interfaces of the air intake pipe 306 , the fifth manifold 307 and the sixth manifold 308 are arranged on the side of the second separator skid 309 , and each pipe interface is provided with a flange 4 .

[0044] In the present invention, the two-phase flowmeter 102 and the first air inlet pipe 101 are arranged according to actual conditions, and can be 4 groups, 6 groups, 8 groups, 12 groups, etc. In this embodiment, the two-phase flowmeter skid-mounted subsystem 1 is equipped with 10 groups of first air inlet pipes 10, which can be used for shale gas gathering and transportation of 10 gas wells, and 10 groups of two-phase flowmeters 102 are correspondingly arranged. The two-phase flowmeter 102 is a gas-liquid two-phase flowmeter that adopts the inner cone + Venturi double throttling technology, with a gas phase flow measurement accuracy of ±2% and a liquid phase flow measurement accuracy of ±10%. The specific structure and function of the two-phase flowmeter 102 are all existing technologies and will not be repeated here. The first separator 201 and the second separator 301 are horizontal separators. Compared with vertical separators, horizontal separators have higher separation efficiency and meet the requirements of gas-liquid separators with high liquid production in the early stage of shale gas wells. Mist collectors are set at the gas phase outlets of the first separator 201 and the second separator 301 to remove large droplets carried by shale gas. The first separator 201 and the second separator 301 use drain valves for automatic drainage. Each of the first separator 201 and the second separator 301 is equipped with a safety vent valve, which allows for safe drainage under overpressure conditions, ensuring equipment safety. Specifically, the first separator 201 is also connected to a first liquid discharge line, a first sewage discharge line, and a first vent line. The first liquid discharge line is equipped with a first drain valve 211, the first sewage discharge line is equipped with a first sewage discharge valve, and the first vent line is equipped with a safety vent valve. The second separator 301 is also connected to a second liquid discharge line, a second sewage discharge line, and a second safety vent valve. The second liquid discharge line is equipped with a second drain valve 310, the second sewage discharge line is equipped with a second sewage discharge valve, and the second vent line is equipped with a second safety vent valve.

[0045] The first separator 201 and the second separator 301 are respectively provided with a safety venting pipeline, and the safety venting pipeline is equipped with a safety venting valve, which can be safely vented under overpressure conditions to ensure the safety of the equipment.

[0046] When shale gas needs to be extracted and processed, this utility model is newly installed at the preset position of the gas gathering station, and then the air inlet pipes of the two-phase flow meter skid-mounted subsystem are connected to the gas extraction pipes of the shale gas wellhead, so as to complete the gas-liquid two-phase metering, gas-liquid separation and high-pressure and low-pressure transmission of shale gas. The high pressure refers to the pressure when the wellhead pressure is higher than the pressure required for shale gas external transmission, and the low pressure refers to the pressure when the wellhead pressure is lower than the pressure required for shale gas external transmission.

[0047] The specific working principle of the present invention is as follows:

[0048] 1) When the wellheads are all under high-pressure working conditions (high-pressure working conditions refer to the pressure at the wellhead being higher than the pressure required for shale gas export), the working principle of the present invention is as follows:

[0049] like Figure 1As shown, the inlets of the air inlet pipes 101 of the two-phase flow meter skid-mounted subsystem 1 are connected to the gas production pipes of the wellheads respectively. Shale gas flows into the two-phase flow meter 102 through the first air inlet pipe 101 for gas-liquid two-phase measurement. The measured shale gas enters the first branch pipe 103 and the second branch pipe 104. The first branch pipe 103 is connected to the first manifold 107, and the second branch pipe 104 is connected to the second manifold 108. By controlling the opening and closing states of the first gate valve 105 and the second gate valve 106 on the branch pipes, the high-pressure shale gas can be relatively evenly flowed into the first manifold 107 and the second manifold 108 respectively. The shale gas flowing into the first manifold 107 after measurement passes through the second air inlet pipe 206 and enters the first separator 201 for gas-liquid separation treatment to remove The sand and liquid droplets in the shale gas are separated and enter the third branch pipe 202. At this time, the third gate valve 204 is opened and the fourth gate valve 205 is closed to control the high-pressure shale gas to flow into the fourth manifold 208, and then into the downstream sixth manifold 308; the shale gas that flows into the second manifold 108 after metering passes through the connecting pipe 209 and the third air inlet pipe 306 and enters the second separator 301 for gas-liquid separation treatment to remove the sand and liquid droplets in the shale gas; the separated shale gas enters the fifth branch pipe 302. At this time, the fifth gate valve 304 is opened and the sixth gate valve 305 is closed to control the high-pressure shale gas to flow into the sixth manifold 308; a flange 4 is set at the outlet of the sixth manifold 308 to facilitate the connection of the sixth manifold 308 with other facilities of the gas gathering station.

[0050] 2) Different gas wells have different wellhead pressure conditions. When there are two working conditions, high-pressure working conditions and low-pressure working conditions (low-pressure working conditions refer to the pressure at the wellhead of the gas well being lower than the pressure required for shale gas export), the working principle of the present invention is as follows:

[0051] like Figure 1As shown, the inlets of the air inlet pipes 101 of the two-phase flowmeter skid 1 are connected to the gas production pipes at the wellheads, respectively. The shale gas in each gas well flows into the two-phase flowmeter 102 through the first air inlet pipe 101 for gas-liquid two-phase measurement. The measured shale gas enters the first branch pipe 103 and the second branch pipe 104. The first branch pipe 103 is connected to the first manifold 107, and the second branch pipe 104 is connected to the second manifold 108. If it is detected that the wellhead pressure is higher than the pressure required for shale gas export, the connection with the gas well is opened. The first gate valve 105 on the first branch pipe 103 connected to the gas well closes the second gate valve 106 on the second branch pipe 104, so that the high-pressure shale gas in the gas well flows into the first manifold 107 through the corresponding first gas inlet pipe 101; if it is detected that the wellhead pressure of the gas well is lower than the pressure required for shale gas export, the first gate valve 105 on the first branch pipe 103 connected to the gas well is closed, and the second gate valve 106 on the second branch pipe 104 is opened, so that the low-pressure shale gas in the gas well flows into the first manifold 107 through the corresponding first gas inlet pipe 101. 1 flows into the second manifold 108; the high-pressure shale gas that flows into the first manifold 107 after metering passes through the second air inlet pipe 206 and enters the first separator 201 for gas-liquid separation to remove sand and free water in the shale gas. The separated high-pressure shale gas enters the third branch pipe 202. At this time, the third gate valve 204 is opened and the fourth gate valve 205 is closed to control the high-pressure shale gas to flow into the fourth manifold 208, and then into the downstream sixth manifold 308; the low-pressure shale gas that flows into the second manifold 108 after metering After passing through the connecting pipe 209 and the third air inlet pipe 306, the shale gas enters the second separator 301 for gas-liquid separation to remove sand and droplets in the shale gas; the separated low-pressure shale gas enters the sixth branch pipe 303, at which time the fifth gate valve 304 is closed and the sixth gate valve 305 is opened to control the low-pressure shale gas to flow into the fifth manifold 307; flanges 4 are respectively provided at the outlets of the fifth manifold 307 and the sixth manifold 308 to facilitate the connection of the fifth manifold 307 and the sixth manifold 308 with other facilities of the gas gathering station.

[0052] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated gathering, transportation and processing skid-mounted system for high and low pressure shale gas distribution and transportation, characterized by: It includes a two-phase flow meter skid-mounted subsystem, a first separator skid-mounted subsystem and a second separator skid-mounted subsystem which are arranged in sequence; The two-phase flowmeter skid-mounted subsystem includes: a two-phase flowmeter skid, and a plurality of first air inlet pipes, a first manifold, and a second manifold mounted on the two-phase flowmeter skid. The first air inlet pipe is provided with a two-phase flowmeter. One end of the first air inlet pipe is connected to a wellhead gas production line, and the other end of the first air inlet pipe is connected to the first manifold and the second manifold, respectively. The first separator skid-mounted subsystem includes a first separator skid, and a second air intake duct, a first separator, a third manifold, and a fourth manifold mounted on the first separator skid; the inlet of the second air intake duct is connected to the first manifold, and the outlet of the second air intake duct is connected to the inlet of the first separator; the outlet of the first separator is connected to the third manifold and the fourth manifold respectively; The second separator skid-mounted subsystem includes a second separator skid, and a second separator, a third air intake duct, a fifth manifold, and a sixth manifold mounted on the second separator skid. The inlet of the third air intake duct is connected to the second manifold via a connecting duct provided on the second separator skid, the outlet of the third air intake duct is connected to the inlet of the second separator, and the outlet of the second separator is connected to the fifth manifold and the sixth manifold, respectively. The two-phase flow meter skid, the first separator skid, and the second separator skid are arranged in sequence, and adjacent skids are connected by bolts; the third manifold is connected to the fifth manifold; and the fourth manifold is connected to the sixth manifold; The two-phase flowmeter skid is further provided with a third branch pipe and a fourth branch pipe. The outlet of the first air inlet pipe is connected to the first manifold through the first branch pipe. The first gate valve is provided on the first branch pipe. The outlet of the first separator is communicated with the third manifold through a third branch pipe, and a third gate valve is arranged on the third branch pipe.

2. The integrated gathering, transportation and processing skid-mounted system for high and low pressure shale gas distribution and transportation according to claim 1, characterized in that: The outlet of the first air inlet pipe is connected to the second manifold through a second branch pipe, and a second gate valve is arranged on the second branch pipe.

3. The integrated gathering, transportation and processing skid-mounted system for high and low pressure shale gas distribution and transportation according to claim 2, characterized in that: The interfaces of the first air inlet pipe, the first manifold and the second manifold are arranged on the side of the two-phase flow meter skid, and flanges are respectively installed at the interfaces of the three pipes.

4. The integrated gathering, transportation and processing skid-mounted system for high and low pressure shale gas distribution and transportation according to claim 1, characterized in that: The outlet of the first separator is communicated with the fourth manifold through a fourth branch pipe, and a fourth gate valve is arranged on the fourth branch pipe.

5. The integrated gathering, transportation and processing skid-mounted system for high and low pressure shale gas distribution and transportation according to claim 1, characterized in that: The interfaces of the connecting pipe, the second air inlet pipe, the third manifold and the fourth manifold are arranged on the side of the first separator skid, and the interfaces of each pipe are installed with a flange, and each pipe is connected to the pipes on other skids through the flange.

6. The integrated gathering, transportation and processing skid-mounted system for high and low pressure shale gas distribution and transportation according to claim 1, characterized in that: The second separator skid seat is further provided with a fifth branch pipe and a sixth branch pipe; the outlet of the second separator is connected to the sixth manifold through the fifth branch pipe, and the outlet of the second separator is connected to the fifth manifold through the sixth branch pipe.

7. The integrated gathering, transportation and processing skid-mounted system for high and low pressure shale gas distribution and transportation according to claim 6, characterized in that: The interfaces of the air intake pipe, the fifth manifold and the sixth manifold are arranged on the side of the second separator skid, and each pipe interface is provided with a flange.

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