Throttle valve bank pry for natural gas
By designing a throttle valve group for natural gas, the excessive pressure difference and maintenance shutdown caused by high flow pressure at the wellhead during natural gas collection process is solved, and effective throttling of natural gas and continuous wellhead production is achieved.
Patent Information
- Application Number
- CN202422022717.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-20
AI Technical Summary
During the natural gas collection process, some wellheads have high flow pressure, which leads to excessive pressure difference before and after the first-stage throttling of the water jacket furnace, causing a drop in the natural gas temperature, which may lead to the risk of pipeline blockage and overpressure explosion. At the same time, the wellhead must be shut down during maintenance, affecting production efficiency.
A throttle valve group for natural gas is designed, including a pry seat, at least two throttle lines, throttle devices, intake pipes and exhaust pipes. Through the coordination of the first valve and the intake reversing valve, natural gas can be switched to another throttle line through the reversing pipeline, which facilitates maintenance and avoids wellhead shutdown.
The throttling device throttling and reducing the pressure difference before and after the first-stage throttling of the water jacket furnace, avoiding the temperature drop and ice blockage of natural gas, ensuring that the wellhead does not stop for maintenance and improve production efficiency.
Smart Images
Figure CN222963745U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas production processes in oil and gas fields, and particularly relates to a throttle valve group skid for natural gas. Background Art
[0002] After the natural gas is collected from the wellhead, it needs to be heated by a water jacket furnace to prevent ice blockage of the natural gas in the transportation pipeline. The conventional treatment method is to heat the high-pressure natural gas through the water jacket furnace, and then use a throttle valve to throttle and depressurize the natural gas.
[0003] However, in actual production, some natural gas wellheads have a relatively high flow pressure. If the conventional treatment method is used to treat the natural gas, it will cause too large a pressure difference before and after the first-stage throttling of the water jacket furnace. Even if the natural gas is heated to a predetermined temperature by the water jacket furnace, there will still be a large temperature drop after the first-stage throttling of the water jacket furnace; when the natural gas with a lower temperature flows in the transportation pipeline, hydrates will be formed at the valves or elbows, resulting in a reduction in the flow cross-section of the pipeline or valve. Seriously, it will block the transportation pipeline, causing the pressure of the production pipeline between the wellhead and the water jacket furnace to rise, and there is a risk of pipeline overpressure explosion; moreover, currently, when maintaining the water jacket furnace, the wellhead needs to be shut down, which affects the production efficiency. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the deficiencies in the prior art that the pressure difference before and after the first-stage throttling of the natural gas produced from the wellhead with a relatively high flow pressure is too large and maintaining the water jacket furnace will cause the wellhead to shut down, and to provide a throttle valve group skid for natural gas.
[0005] In a first aspect, the utility model provides a throttle valve group skid for natural gas, comprising
[0006] a skid base, on which at least two throttle pipelines are arranged;
[0007] The throttle pipeline comprises a throttling device, an intake pipeline and an exhaust pipeline. The throttling device is communicated with the natural gas wellhead through the intake pipeline, the throttling device is communicated with the water jacket furnace through the exhaust pipeline, a first valve is arranged on the intake pipeline, and a second valve is arranged on the exhaust pipeline;
[0008] An intake commutation branch is arranged between adjacent throttle pipelines. Two ends of the intake commutation branch are respectively communicated with different intake pipelines, and an intake commutation valve is arranged on the intake commutation branch; along the flow path of the natural gas in the throttle pipeline, the intake commutation branch is located on the upstream side of the first valve.
[0009] A throttle valve group skid for natural gas of the utility model is provided with at least two throttle pipelines on a skid base. Through the cooperation of a first valve and an intake air changeover valve, natural gas can be switched to another throttle pipeline through a changeover pipeline, which is convenient for operators to maintain the throttle device and the subsequent equipment, and avoids wellhead shutdown when maintaining the throttle device or the water jacket furnace. The natural gas after passing through the throttle device is throttled and depressurized, so that the pressure of the natural gas entering the water jacket furnace is reduced, thereby avoiding the situation of too large pressure difference before and after the first-stage throttling of the water jacket furnace, and thus avoiding a large temperature drop of the natural gas during transportation and preventing ice blockage.
[0010] Preferably, an exhaust changeover branch is provided between adjacent throttle pipelines. Both ends of the exhaust changeover branch are respectively communicated with different exhaust pipelines, and an exhaust changeover valve is provided on the exhaust changeover branch. Along the flow path of natural gas in the throttle pipeline, the exhaust changeover branch is located on the downstream side of the second valve.
[0011] By opening the exhaust changeover valve, the throttled and depressurized natural gas can enter another throttle pipeline, so that the natural gas can enter the water jacket furnace for heating at the same time, improving the heating efficiency of the natural gas.
[0012] Preferably, a third valve is provided on the exhaust pipeline. Along the flow path of natural gas in the throttle pipeline, the third valve is located on the downstream side of the exhaust changeover branch.
[0013] By shutting off the second valve and the third valve, the exhaust changeover branch can be isolated, which is convenient for operators to maintain the exhaust changeover valve and the exhaust changeover branch. By shutting off the third valve, the water jacket furnace can be isolated from the throttle pipeline, so that operators can maintain the water jacket furnace without shutting down the wellhead.
[0014] Preferably, a metering pipe section is provided on the intake pipeline. One end of the metering pipe section is communicated with the intake pipeline, and the other end is communicated with a natural gas wellhead. A pressure gauge and a thermometer are provided on the metering pipe section, and the pressure gauge and the thermometer are arranged at intervals.
[0015] The pressure and temperature of natural gas are monitored by the pressure gauge and the thermometer provided on the metering pipe section. An interval is provided between the pressure gauge and the thermometer, which is convenient for operators to maintain the metering gauges. The pressure gauge and the thermometer adopt double valves as root valves, and the pressure gauge and the thermometer are preferably gauges with remote communication functions, enabling operators to remotely monitor the temperature and pressure data of natural gas.
[0016] Preferably, a dosing port is provided on the metering pipe section, and a dosing valve is provided on the dosing port. Along the flow path of natural gas in the throttle pipeline, the dosing port is located on the upstream side of the metering gauges.
[0017] By connecting a chemical dosing device to the dosing valve, when the dosing valve is opened, a slow-release agent or a bactericide can be introduced into the throttling pipeline, thereby protecting the subsequent throttling pipeline, jacket furnace, and transportation pipeline.
[0018] Preferably, a cut-off valve is provided between the metering pipe section and the intake pipeline.
[0019] By closing the cut-off valve, the metering pipe section is isolated from the intake pipeline, enabling operators to maintain the intake air changeover valve and the throttling device.
[0020] Preferably, a venting device is provided on the intake pipeline, and the venting device is located between the first valve and the throttling device.
[0021] The venting device can vent the pipeline when the pipeline is over-pressurized and the wellhead shuts down.
[0022] Preferably, the venting device includes a venting valve, an adjustable throttle valve, and a discharge pipe. One end of the adjustable throttle valve is communicated with the venting valve, and the other end is communicated with the discharge pipe. The venting valve is communicated with the intake pipeline.
[0023] By opening the venting valve, the adjustable throttle valve is communicated with the intake pipeline. Operators can adjust the adjustable throttle valve to an appropriate venting pressure according to the pressure in the throttling pipeline, and the discharge pipe transfers the throttled natural gas to a safe location for release.
[0024] Preferably, the throttling device includes a fixed throttle valve. The fixed throttle valve is detachably connected to the intake pipeline and detachably connected to the exhaust pipeline.
[0025] The flow rate after throttling by the fixed throttle valve is fixed, so that the natural gas entering the jacket furnace remains at a fixed pressure and flow rate, avoiding excessive temperature drop in the first-stage throttling of the jacket furnace. According to the different pressures at the wellhead, an appropriate fixed throttle valve is selected for replacement; the fixed throttle valve has the advantage of good durability.
[0026] Preferably, the skid base is provided with a toolbox and a nameplate, and the nameplate is spaced from the toolbox.
[0027] The skid base is provided with a toolbox and a nameplate. The toolbox facilitates operators to maintain the throttling valve group skid for natural gas, and the nameplate facilitates the identification of the throttling valve group skid for natural gas.
[0028] Compared with the prior art, the beneficial effects of the present utility model are:
[0029] A throttle valve group skid for natural gas of the present utility model is provided with at least two throttle pipelines on a skid base. Through the cooperation of a first valve and an intake air changeover valve, natural gas can be switched to another throttle pipeline through a changeover pipeline, which is convenient for operators to maintain the throttle device and the subsequent equipment, and avoids the shutdown of the wellhead when maintaining the throttle device or the water jacket furnace; the natural gas after passing through the throttle device is throttled and depressurized, so that the pressure of the natural gas entering the water jacket furnace is reduced, thereby avoiding the situation of too large pressure difference before and after the first-stage throttling of the water jacket furnace, and thus avoiding a large temperature drop during the transportation of natural gas and preventing ice blockage; the throttle valve group skid for natural gas of the present utility model has a simple structure, is easy to manufacture and convenient to use. By throttling and depressurizing the natural gas before entering the water jacket furnace through the throttle device, the situation of too large pressure difference before and after the first-stage throttling of the water jacket furnace is avoided, and a large temperature drop after the first-stage throttling is avoided, so as to achieve the purpose of preventing ice blockage in the transportation pipeline; multiple throttle pipelines are provided on the skid base, and the natural gas can be switched to different throttle pipelines for flow by controlling the opening and closing of valves, thereby avoiding the shutdown of the natural gas wellhead caused by equipment maintenance, and having good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 FIG. is a schematic structural diagram of a throttle valve group skid for natural gas;
[0031] Figure 2 FIG. is a layout structural diagram of a third valve.
[0032] Reference numerals in the figures:
[0033] 1 - skid base, 2 - throttle device, 3 - intake pipeline, 31 - first valve, 4 - exhaust pipeline, 41 - second valve, 42 - third valve, 5 - intake air changeover branch, 51 - intake air changeover valve, 6 - exhaust air changeover branch, 61 - exhaust air changeover valve, 7 - metering pipe section, 71 - dosing valve, 72 - pressure gauge, 73 - thermometer, 8 - cut-off valve, 9 - venting device, 91 - venting valve, 92 - adjustable throttle valve, 93 - spray pipe, 100 - toolbox, 101 - nameplate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0034] The present utility model will be further described in detail below in conjunction with specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present utility model to the following embodiments. All technologies implemented based on the content of the present utility model belong to the scope of the present utility model.
[0035] Unless otherwise specified, in the description of the specific embodiments of the present utility model, the expression terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product / device / equipment of the present utility model is commonly used. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present utility model or simplifying the description in the specific embodiments, so as to facilitate technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present utility model.
[0036] In addition, when terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but it can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in the directions of "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still perform its function in the solution of the present utility model.
[0037] In addition, when expressions such as "first", "second", "third", etc. appear in the terms, they are only used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.
[0038] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a plurality of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be more than 9.
[0039] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / limited, where terms such as "set", "installed", "connected", "connected", "provided with", "laid", "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be connection means commonly used in the art such as welding, riveting, bolting, threaded connection, etc. This connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components.
[0040] Example 1
[0041] As Figure 1 - Figure 2 shown, a throttling valve group skid for natural gas includes
[0042] a skid base 1, on which at least two throttling pipelines are arranged;
[0043] The throttling pipeline includes a throttling device 2, an intake pipeline 3 and an exhaust pipeline 4. The throttling device 2 is communicated with the natural gas wellhead through the intake pipeline 3, and the throttling device 2 is communicated with the water jacket furnace through the exhaust pipeline 4. A first valve 31 is arranged on the intake pipeline 3, and a second valve 41 is arranged on the exhaust pipeline 4;
[0044] An intake air commutation branch 5 is arranged between adjacent throttling pipelines. The two ends of the intake air commutation branch 5 are respectively communicated with different intake pipelines 3. An intake air commutation valve 51 is arranged on the intake air commutation branch 5; along the flow path of natural gas in the throttling pipeline, the intake air commutation branch 5 is located on the upstream side of the first valve 31.
[0045] At least two throttling pipelines are arranged on the skid base 1. Through the cooperation of the first valve 31 and the intake air commutation valve 51, natural gas can be switched to another throttling pipeline through the commutation pipeline, which is convenient for operators to maintain the throttling device 2 and the subsequent equipment, and avoids the shutdown of the wellhead when maintaining the throttling device 2 or the water jacket furnace; the natural gas after passing through the throttling device 2 is throttled and depressurized, so that the pressure of the natural gas entering the water jacket furnace is reduced, thus avoiding the situation of too large pressure difference before and after the first-stage throttling of the water jacket furnace, thereby avoiding a large temperature drop of natural gas during transportation and avoiding ice blockage.
[0046] Specifically, the throttling pipelines on the skid base 1 are arranged in two ways. The two throttling pipelines are respectively the first pipeline and the second pipeline; the two throttling pipelines are symmetrically arranged on the skid base 1; and the first pipeline and the second pipeline are arranged in parallel.
[0047] In one or several embodiments, an exhaust air commutation branch 6 is arranged between the first pipeline and the second pipeline. An exhaust air commutation valve 61 is arranged on the exhaust air commutation branch 6. Along the flow path of natural gas in the throttling pipeline, the exhaust air commutation branch 6 is located on the downstream side of the second valve 41; the two ends of the exhaust air commutation branch 6 are respectively communicated with the exhaust pipeline 4 of the first pipeline and the exhaust pipeline 4 of the second pipeline; through the exhaust air commutation branch 6, the throttled and depressurized natural gas can be transported to the water jacket furnace of another throttling pipeline for heating.
[0048] In an alternative embodiment, the exhaust pipeline 4 is provided with a third valve 42. Along the flow path of natural gas in the throttling pipeline, the third valve 42 is located on the downstream side of the exhaust switching branch 6. By closing the third valve 42 and the second valve 41, the exhaust switching branch 6 can be isolated, making it easier for operators to maintain the exhaust switching valve 61 and the exhaust switching pipeline. When the water jacket furnace at the outlet of the first throttling pipeline needs to be maintained, the exhaust switching valve 61 and the third valve 42 on the second pipeline can be opened, and the third valve 42 on the first pipeline can be closed, so that the natural gas throttled by the first pipeline flows to the water jacket furnace of the second pipeline, and the water jacket furnace of the first pipeline is isolated from the first pipeline, enabling operators to maintain the water jacket furnace on the first pipeline without shutting down the wellhead.
[0049] In one or several embodiments, along the flow path of natural gas in the throttling pipeline, a metering pipe section 7 is provided upstream of the intake pipeline 3. The end of the metering pipe section 7 is connected to the end of the intake pipeline 3. A metering gauge is provided on the metering pipe section 7. The metering gauge consists of a pressure gauge 72 and a thermometer 73 arranged at intervals. Remote transmission devices are respectively provided on the thermometer 73 and the pressure gauge 72, and the remote transmission devices can remotely transmit temperature and pressure information for operators to monitor remotely. The pressure gauge 72 and the thermometer 73 are arranged at intervals, leaving an operating space to facilitate operators to maintain the pressure gauge 72 and the thermometer 73.
[0050] In an alternative embodiment, a dosing port is provided on the metering pipe section 7. Through the dosing port, a slow-release agent and a bactericide can be dosed into the metering pipe section 7. When natural gas flows, the slow-release agent and the bactericide can flow in the throttling pipeline along with the natural gas, thus providing better protection for the throttling pipeline. A dosing valve 71 is provided at the dosing port, and the dosing valve 71 can be connected to a chemical dosing device. By opening the dosing valve 71, the chemical dosing device can dose chemicals into the metering pipe section 7. Along the flow path of natural gas in the throttling pipeline, the dosing port is located upstream of the metering gauge, enabling the chemicals to protect the throttling pipeline as much as possible. When no chemicals are dosed, the dosing valve 71 is closed to ensure the sealing of the metering pipe section 7. When dosing chemicals, the root valves of the pressure gauge 72 and the thermometer 73 are closed to prevent the chemicals from contaminating the probes of the metering gauge.
[0051] In an alternative embodiment, the pressure gauge 72 is provided with a root valve, and the pressure gauge 72 is connected to the metering pipe section 7 through the root valve. The root valve is a double valve.
[0052] In an alternative embodiment, the thermometer 73 is also provided with a root valve, and the thermometer 73 is connected to the metering pipe section 7 through the root valve.
[0053] In one or more embodiments, a cut-off valve 8 is provided between the metering pipe section 7 and the intake pipeline 3. By closing the cut-off valve 8, the metering pipe section 7 is isolated from the intake pipeline 3, enabling operators to maintain the intake air changeover valve 51 and the throttling device 2.
[0054] In one or more embodiments, a venting device 9 is further provided on the intake pipeline 3. The venting device 9 is located between the first valve 31 and the throttling device 2. When the pressure in the throttling pipeline exceeds the limit, the throttling pipeline can be quickly depressurized through the venting device 9 to ensure the safe use of the throttling pipeline. When the natural gas wellhead shuts down, the throttling pipeline can be vented through the venting device 9, facilitating maintenance.
[0055] In an optional embodiment, the venting device 9 is composed of a venting valve 91, an adjustable throttle valve 92, and a spray pipe 93. One end of the adjustable throttle valve 92 is connected to the venting valve 91, and the other end is connected to the spray pipe 93. The venting valve 91 is connected to the intake pipeline 3. Operators can adjust the adjustable throttle valve 92 according to the pressure of the throttling pipeline, so that the throttling pipeline can be quickly vented. The spray pipe 93 can extend to a safe venting position to ensure the safety of natural gas venting.
[0056] In one or more embodiments, the throttling device 2 is a fixed throttle valve. The fixed throttle valve keeps the pressure of the natural gas after throttling and pressure reduction within a relatively constant range, avoiding excessive temperature drop in the first-stage throttling of the water jacket furnace.
[0057] In one or more embodiments, a toolbox 100 and a nameplate 101 are provided on the skid base 1. The toolbox 100 is spaced from the throttling pipeline, the nameplate 101 is spaced from the throttling pipeline, and the toolbox 100 and the nameplate 101 are spaced from each other, facilitating operators to observe the nameplate 101 and pick up and place tools. The nameplate 101 and the toolbox 100 are usually fixed at the corners of the skid base 1.
[0058] In a specific embodiment, under normal operating conditions, the exhaust changeover valve 61, the intake changeover valve 51, and the venting device 9 on the throttling pipeline are in a closed state. The two-way high-pressure natural gas from the wellhead is respectively connected to the metering pipe sections 7 of the first pipeline and the second pipeline. The pressure gauge 72 and the thermometer 73 can display and monitor the pressure and temperature of the natural gas from the natural gas wellhead. By replacing a suitable fixed throttle valve, the pressure of the natural gas after throttling is controlled so that the pressure of the natural gas after throttling is reduced to meet the requirements of water jacket furnace treatment.
[0059] During the venting process, by opening the adjustable throttle valve 92 and throttling and reducing the pressure of the natural gas by the manually adjustable throttle valve 92 of the operator, the spray pipe 93 is connected to the venting main pipe to realize the venting of natural gas.
[0060] During the injection of the slow-release agent or bactericide during the production process, close the double valves of the pressure gauge 72 and the thermometer 73 to isolate the pressure gauge 72 and the thermometer 73 from the throttling pipeline. Then open the injection valve 71 and inject the slow-release agent or bactericide into the metering pipe section 7.
[0061] A throttling valve bank skid for natural gas has the following advantages:
[0062] 1. It can meet the usage requirements under complex working conditions such as high pressure, high CO 2 partial pressure, and acidic environment. The temperature grade of the materials for the processes inside the skid is P and U grades (temperature range: -29°C to 82°C); the material grade is FF grade (that is, in an acidic environment, the body, bonnet, end or outlet connection, valve hole sealing mechanism, throttle valve adjusting part, and valve stem are all made of stainless steel or CRA), and the material performance requirements are not lower than the requirements of API 6A grade 75K.
[0063] 2. Since the throttling valve bank skid undertakes part of the throttling function, the throttling task borne by the subsequent process supporting water jacket furnace is relatively reduced, the heat load required for the water jacket furnace heating is relatively small, and a water jacket furnace with a lower power can also meet the usage requirements, which can effectively save the investment cost.
[0064] 3. After the high-pressure well is shut in, the natural gas in the throttling pipeline can be quickly and safely discharged through the adjustable throttle valve on the throttling valve bank skid; through the exhaust changeover valve and the intake changeover valve, the start-up switching of the high-pressure well can be efficiently achieved, the natural gas transmission path can be switched without shutting down the wellhead, and the subsequent supporting equipment can be used.
[0065] 4. Compared with the separate procurement of equipment such as high-pressure valves, the overall equipment procurement cycle of the throttling valve bank skid is significantly shortened, and the transportation and installation are relatively simple, with a high reuse rate, which is convenient for the quick start-up of new wells.
[0066] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A throttle valve group skid for natural gas, characterized in that: include A skid seat (1), wherein at least two throttling pipelines are arranged on the skid seat (1); The throttling pipeline comprises a throttling device (2), an air intake pipeline (3) and an exhaust pipeline (4); the throttling device (2) is connected to a natural gas wellhead via the air intake pipeline (3); the throttling device (2) is connected to a water jacket furnace via the exhaust pipeline (4); a first valve (31) is provided on the air intake pipeline (3); and a second valve (41) is provided on the exhaust pipeline (4); An air intake reversing branch (5) is provided between adjacent throttling pipelines, the two ends of the air intake reversing branch (5) are respectively connected to different air intake pipes (3), and an air intake reversing valve (51) is provided on the air intake reversing branch (5); along the flow path of natural gas in the throttling pipeline, the air intake reversing branch (5) is located on the upstream side of the first valve (31).
2. A throttle valve assembly skid for natural gas according to claim 1, characterized in that: An exhaust reversing branch (6) is provided between adjacent throttling pipelines, the two ends of the exhaust reversing branch (6) are respectively connected to different exhaust pipes (4), and an exhaust reversing valve (61) is provided on the exhaust reversing branch (6); along the flow path of the natural gas in the throttling pipeline, the exhaust reversing branch (6) is located on the downstream side of the second valve (41).
3. A throttle valve assembly skid for natural gas according to claim 2, characterized in that: The exhaust pipe (4) is provided with a third valve (42), and along the flow path of the natural gas in the throttling line, the third valve (42) is located on the downstream side of the exhaust reversing branch (6).
4. A throttle valve assembly skid for natural gas according to claim 1, characterized in that: The air intake pipeline (3) is provided with a metering pipe section (7), one end of the metering pipe section (7) is connected to the air intake pipeline (3), and the other end is connected to the natural gas wellhead, and the metering pipe section (7) is provided with a pressure gauge (72) and a temperature gauge (73), and the pressure gauge (72) and the temperature gauge (73) are arranged at intervals.
5. A throttle valve assembly skid for natural gas according to claim 4, characterized in that: The metering pipe section (7) is provided with a delivery port, and the delivery port is provided with a delivery valve (71). Along the flow path of the natural gas in the throttling pipeline, the delivery port is located on the upstream side of the pressure gauge (72).
6. A throttle valve assembly skid for natural gas according to claim 4, characterized in that: A shutoff valve (8) is provided between the metering pipe section (7) and the air intake pipe (3).
7. A throttle valve assembly skid for natural gas according to claim 1, characterized in that: The air intake pipeline (3) is provided with a venting device (9), and the venting device (9) is located between the first valve (31) and the throttling device (2).
8. A throttle valve assembly skid for natural gas according to claim 7, characterized in that: The venting device (9) comprises a venting valve (91), an adjustable throttle valve (92) and a blow pipe (93); one end of the adjustable throttle valve (92) is connected to the venting valve (91) and the other end is connected to the blow pipe (93); the venting valve (91) is connected to the air intake pipe (3).
9. A throttle valve assembly skid for natural gas according to claim 1, characterized in that: The throttling device (2) comprises a fixed throttle valve, the fixed throttle valve is detachably connected to the intake pipe (3), and the fixed throttle valve is detachably connected to the exhaust pipe (4).
10. A throttle valve assembly skid for natural gas according to any one of claims 1 to 9, characterized in that: The pry seat (1) is provided with a tool box (100) and a nameplate (101), and the nameplate (101) is arranged at a distance from the tool box (100).