Multifunctional integrated compressor system and control method thereof

Abstract

The invention discloses a multifunctional integrated compressor system and a control method thereof. The compressor system comprises a first gas inlet pipeline, a second gas inlet pipeline, a first compressor unit, an interstage filter, a second compressor unit, a mixed transportation pipeline and a gas lift pipeline. An air outlet of the first air inlet pipeline is divided into a first branch and a second branch, the first branch and the second branch are connected with the first compressor unit and the second compressor unit respectively, and the output end of the first compressor unit is connected with the interstage filter; a gas outlet of the interstage filter is respectively connected with a mixed transportation pipeline and a second gas inlet pipeline; the second air inlet pipeline is connected with the second compressor unit; the output end of the second compressor unit is respectively connected with the gas lift pipeline and the mixed transportation pipeline; and control valves are arranged on the first gas inlet pipeline, the first branch, the second branch, the second gas inlet pipeline and the gas lift pipeline. The device is simultaneously suitable for wellhead vent gas recovery, mixed transportation pressurization and gas lift services, and the working efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor systems. More particularly, the present application relates to a multifunctional integrated compressor system and a control method thereof. BACKGROUND

[0002] In the field of oil and gas exploration, compressors are one of the core equipment to ensure production operation, mainly used for gas pressurization and mixed transportation (external transportation) and pressurization gas lift two key working conditions. However, the traditional compressor is usually designed only for single working condition, which cannot meet the needs of external transportation and gas lift at the same time. The external transportation compressor needs to adapt to the medium-low pressure and large flow condition, while the gas lift compressor needs to provide high pressure and small flow output, and the parameter difference between the two is significant and cannot be compatible, resulting in the need to configure two independent systems at the well site. This not only increases the equipment investment and land area, but also reduces the overall efficiency due to frequent switching and redundant operation, which increases the production cost. In addition, during wellhead testing, well repair or emergency pressure relief, a large amount of natural gas is forced to be treated by ignition and blowout, and the single well daily blowout volume can reach several thousand square meters, causing serious resource waste and environmental pollution. At present, the main solutions to the above problems in the industry still have significant shortcomings. The double-machine parallel scheme (i.e. deploying external transportation and gas lift compressors at the same time) can realize function coverage, but the equipment redundancy is high, the energy consumption increases by more than 30%, and the control system is complex, and the maintenance cost increases significantly. Another solution is to use mobile compressor units to recover blowout gas, but due to slow response speed and poor adaptability, it is difficult to respond to the rapid fluctuations of wellhead pressure. In addition, some oilfields reduce pollution by optimizing the flare system, but the methane recovery rate is still less than 15%, and greenhouse gas emissions cannot be avoided. These methods have not fundamentally solved the three core problems of poor working condition adaptability, serious energy waste and high environmental compliance risk. Therefore, it is urgent to develop a multifunctional integrated compression system suitable for wellhead natural gas recovery, pressurization, gas lift, filling, etc. SUMMARY

[0003] It is an object of the present application to solve at least the above problems and to provide at least the advantages shortly to be explained.

[0004] In order to achieve the purposes and other advantages according to the present application, a multifunctional integrated compressor system is provided, comprising: a first gas inlet pipeline, a second gas inlet pipeline, a first compressor unit, an inter-stage filter, a second compressor unit, a mixed transportation pipeline, a gas lifting pipeline; the gas inlet of the first gas inlet pipeline is connected with a Christmas tree, a production pipeline or a venting pipeline of a wellhead; the gas outlet of the first gas inlet pipeline is branched into a first branch and a second branch, which are respectively connected with the first compressor unit and the second compressor unit, and the output end of the first compressor unit is connected with the inter-stage filter; the gas outlet of the inter-stage filter is respectively connected with the mixed transportation pipeline and the second gas inlet pipeline; the second gas inlet pipeline is connected with the second compressor unit; the output end of the second compressor unit is respectively connected with the gas lifting pipeline and the mixed transportation pipeline; the first gas inlet pipeline, the first branch, the second branch, the second gas inlet pipeline and the gas lifting pipeline are all provided with control valves.

[0005] Preferably, the first compressor unit comprises a first compression cylinder and a second compression cylinder connected in parallel, and the second compressor unit comprises a third compression cylinder and a fourth compression cylinder connected in parallel; the output ends of the first compression cylinder and the second compression cylinder are both connected with the inter-stage filter; the second gas inlet pipeline is branched into a third branch and a fourth branch, which are respectively connected with the third compression cylinder and the fourth compression cylinder.

[0006] Preferably, the output end of the fourth compression cylinder is branched into a fifth branch and a sixth branch, the pipeline connected with the output end of the third compression cylinder and the sixth branch are both communicated with the gas lifting pipeline through a three-way joint; the fifth branch is communicated with the mixed transportation pipeline; the fifth branch and the sixth branch are both provided with the control valve.

[0007] Preferably, a filter separator is arranged on the first gas inlet pipeline.

[0008] Preferably, flow meters are arranged on the first gas inlet pipeline, the first branch, the second branch, the second gas inlet pipeline, the mixed transportation pipeline and the gas lifting pipeline; pressure sensors are arranged on the gas inlet of the first gas inlet pipeline, the gas outlet of the mixed transportation pipeline and the gas outlet of the gas lifting pipeline.

[0009] Preferably, the first gas inlet pipeline, the second gas inlet pipeline, the first compressor unit, the inter-stage filter, the second compressor unit, the mixed transportation pipeline and the gas lifting pipeline are all integrated in a box; the box comprises an inner layer, an outer layer and a sandwiched interlayer, and the interlayer is a damping functional composite material.

[0010] Preferably, cooling devices are respectively arranged on the first compression cylinder, the second compression cylinder, the third compression cylinder and the fourth compression cylinder.

[0011] The application also aims to provide a control method of the multifunctional integrated compressor system, which comprises the following steps: opening the control valves on the first air inlet pipeline, the first branch, the second branch, the fifth branch and the sixth branch, and closing the control valves on the second air inlet pipeline and the gas lifting pipeline; after the incoming gas enters the first air inlet pipeline, part of the gas enters the first compression cylinder and the second compression cylinder through the first branch, enters the inter-stage filter after being pressurized, and is externally discharged through the mixed transportation pipeline after being filtered and buffered; the other part of the gas enters the third compression cylinder and the fourth compression cylinder through the second branch, and is externally discharged through the sixth branch and the gas lifting pipeline after being pressurized.

[0012] The application also aims to provide a control method of the multifunctional integrated compressor system, which comprises the following steps: opening the control valves on the first air inlet pipeline, the first branch, the second branch, the sixth branch and the gas lifting pipeline, and closing the control valves on the second air inlet pipeline and the fifth branch; after the incoming gas enters the first air inlet pipeline, part of the gas enters the first compression cylinder and the second compression cylinder through the first branch, enters the inter-stage filter after being pressurized, and is externally discharged through the mixed transportation pipeline after being filtered and buffered; the other part of the gas enters the third compression cylinder and the fourth compression cylinder through the second branch, and is injected into the wellhead through the sixth branch and the gas lifting pipeline after being pressurized.

[0013] The application also aims to provide a control method of the multifunctional integrated compressor system, which comprises the following steps: opening the control valves on the first air inlet pipeline, the first branch, the second branch, the fifth branch and the gas lifting pipeline, and closing the control valves on the second air inlet pipeline and the sixth branch; after the incoming gas enters the first air inlet pipeline, part of the gas enters the first compression cylinder and the second compression cylinder through the first branch, enters the inter-stage filter after being pressurized, and is externally discharged through the mixed transportation pipeline after being filtered and buffered; the other part of the gas enters the third compression cylinder and the fourth compression cylinder through the second branch, the gas pressurized by the third compression cylinder is injected into the wellhead through the gas lifting pipeline, and the gas pressurized by the fourth compression cylinder is externally discharged through the fifth branch and the mixed transportation pipeline.

[0014] The application at least has the following beneficial effects: 1. The multifunctional integrated compressor system and the control method thereof can be simultaneously applied to wellhead vent gas recovery, mixed transportation pressurization, gas lifting and other businesses, thereby effectively improving the work efficiency, and being especially suitable for well sites that need to simultaneously perform mixed transportation and gas lifting operations. The recovery of the vent gas can reduce the waste of resources and the pollution to the environment, and realizes the in-situ utilization of resources.

[0015] 2. The multifunctional integrated compressor system and the control method thereof can independently operate the four compression cylinders of the two compressor units, the single cylinder body is not affected when other cylinder bodies are started or stopped, the production and maintenance are facilitated, the gas lifting cylinder can be adjusted to an external discharge cylinder according to the actual working condition, the compressor does not need to be stopped in the middle, the number of times of starting and stopping the compressor is reduced, and the work efficiency is improved.

[0016] Other advantages, objects, and features of the application will be apparent from the following specification and appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Schematic diagram of the multifunctional integrated compressor system according to the present application; Figure 2 Schematic diagram of the internal structure of the multifunctional integrated compressor system according to the present application; DETAILED DESCRIPTION

[0018] The application will be further described in conjunction with the drawings, so that those skilled in the art can implement it according to the description and drawings.

[0019] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained commercially unless otherwise specified. In the description of the present application, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0020] As shown in Figure 1 and Figure 2 The present application provides a multifunctional integrated compressor system, which comprises a first gas inlet pipeline 1, a second gas inlet pipeline 14, a first compressor unit, an inter-stage filter 8, a second compressor unit, a mixed transport pipeline 5, and a gas lifting pipeline 18. The gas inlet of the first gas inlet pipeline 1 is connected to a Christmas tree, a production pipeline, or a venting pipeline at a wellhead. The gas outlet of the first gas inlet pipeline is branched into a first branch 9 and a second branch 7, which are respectively connected to the first compressor unit and the second compressor unit. The output end of the first compressor unit is connected to the inter-stage filter 9. The gas outlet of the inter-stage filter 9 is respectively connected to the mixed transport pipeline 5 and the second gas inlet pipeline 14. The second gas inlet pipeline 14 is connected to the second compressor unit. The output end of the second compressor unit is respectively connected to the gas lifting pipeline 18 and the mixed transport pipeline 5. Control valves are provided on the first gas inlet pipeline 1, the first branch 9, the second branch 7, the second gas inlet pipeline 15, and the gas lifting pipeline 18, such as the control valve 3 on the first gas inlet pipeline 1, the control valve 15 on the second gas inlet pipeline 15, and the control valve 19 on the gas lifting pipeline 18. Figure 1 ​

[0021] In this technical solution, the gas lift exhaust port of the gas lift pipeline 18 is injected into the wellhead through the pipeline, and the mixed transport exhaust port of the mixed transport pipeline 5 is connected with the external transport equipment; the flow direction of the gas in the compressor system is adjusted by controlling the control valves on each pipeline, and the first compressor set and the second compressor set can simultaneously perform pressurization and external transport, or respectively perform pressurization and external transport and gas lift. When the first intake pipeline 1 is connected with the venting pipeline, the venting gas is extracted by increasing the displacement of the first compressor set and / or the second compressor set to realize the in-situ capture and utilization of the venting gas. The recovered natural gas can be used for reinjection, gas lift, and external transport, respectively. When the gas is vented, if the pressure is too high, the gas flow rate is controlled to control the production until the intake conditions of the compressor set are met. The traditional natural gas pressurization equipment generally uses a mechanical piston pressurization device. The mechanical piston pressurization device needs a motor to drive a crankshaft, and the crankshaft drives the piston to move reciprocally through a connecting rod to realize natural gas pressurization. The connecting mechanism is complex, and when designing the torque on both sides of the piston rod corresponding to the cylinder, the symmetry balance needs to be fully considered, otherwise the unit cannot operate. In the case of realizing that one pressurization device corresponds to multiple pressure and flow conditions, the connecting mechanism of this type will have problems such as complex design, large motor capacity redundancy, and high energy consumption. Therefore, the main driving mode of the first compressor set and the second compressor set in the system is selected as the hydraulic piston driving mode, which does not have the complex connecting mechanism of the traditional mechanical piston compressor. Multiple motors drive hydraulic oil pumps to respectively drive compression cylinders, which is easy to realize independent control and independent operation of each cylinder, thereby easily meeting the demand for multiple pressurization conditions and flow configuration.

[0022] In another technical solution, the first compressor set includes a first compression cylinder 11 and a second compression cylinder 13 connected in parallel, and the second compressor set includes a third compression cylinder 17 and a fourth compression cylinder 21 connected in parallel; the output ends of the first compression cylinder 11 and the second compression cylinder 13 are connected with the inter-stage filter 8; the second intake pipeline 14 branches into a third branch and a fourth branch, which are respectively connected with the third compression cylinder 17 and the fourth compression cylinder 21. The above four compression cylinders can independently operate, and use hydraulic pressure as the transmission medium, which is controlled by a soft starter to operate, and can adaptively operate the compression cylinders according to the inlet and outlet pressures. The start and stop of a single cylinder body do not affect other cylinder bodies, which is convenient for production and maintenance, and can judge whether to adjust the gas lift cylinder to an external transport cylinder according to the actual working condition, without stopping the operation of the compressor in the middle, reducing the number of start and stop of the compressor, and improving the working efficiency. The first branch 9 is further divided into a seventh branch and an eighth branch, which are respectively connected with the first compression cylinder 11 and the second compression cylinder 13. As shown in FIG. 2, control valves 10, 12, 15, 6, and 16 are respectively arranged on the seventh branch, the eighth branch, the second intake pipeline, the third branch, and the fourth branch. Figure 1 ​

[0023] Further, the fourth compression cylinder 21 gas lift pipeline 18 fourth compression cylinder 21 the output end of the fourth compression cylinder 22 is branched into fifth branch 23 and sixth branch 21, the output end of the third compression cylinder 17 is connected with the pipeline and the sixth branch 21 is communicated with the gas lift pipeline 18 through a tee joint; the fifth branch 23 is communicated with the mixed transport pipeline 5; the fifth branch 23 and the sixth branch 21 are both provided with control valves 24 and control valves 20.

[0024] In another technical scheme, the first gas inlet pipeline 1 is provided with a filter separator 4. After the gas enters the first gas inlet pipeline 1, it is first separated and filtered by the filter separator 4 to separate the gas-liquid-solid components in the gas source, obtain dry and pure natural gas, and adjust the gas inlet amount of the compressor set to realize stable pressure buffering.

[0025] In another technical scheme, flow meters are arranged on the first gas inlet pipeline 1, the first branch 9, the second branch 7, the second gas inlet pipeline 14, the mixed transport pipeline 5 and the gas lift pipeline 18; the gas inlet of the first gas inlet pipeline 1, the gas outlet of the mixed transport pipeline 5 and the gas outlet of the gas lift pipeline 18 are all provided with pressure sensors, such as the pressure sensor 2 in Figure 1 By collecting the gas flow and pressure of the above key nodes, the feeding ratio of the collected gas and the vented gas of the two compressor sets can be adjusted to ensure the stable operation of the compressor system.

[0026] In another technical scheme, the first gas inlet pipeline 1, the second gas inlet pipeline 14, the first compressor set, the inter-stage filter 8, the second compressor set, the mixed transport pipeline 5 and the gas lift pipeline 18 are integrated in a box, the box comprises an inner layer, an outer layer and a sandwiched interlayer, and the interlayer is a damping functional composite material. The box of the compressor system adopts a damping functional composite interlayer, and the inner layer and the outer layer can adopt a metal material, which can control the noise within 85db and control the noise and vibration.

[0027] In another technical scheme, the first compression cylinder 11, the second compression cylinder 13, the third compression cylinder 17 and the fourth compression cylinder 22 are all correspondingly provided with cooling devices. Preferably, the cooling devices adopt a water circulation cooling system. The cooling devices are also integrated in the box.

[0028] The application also provides a control method of the multifunctional integrated compressor system, which can mainly provide the following three control methods according to the use requirements: Method one, suitable for pure mixed transport scene, including: opening the control valves (control valve 3, control valve 10, control valve 12, control valve 24, control valve 20 in FIG. 1) on the first inlet pipeline 1, the first branch 9, the second branch 7, the fifth branch 23 and the sixth branch 21, closing the control valves (control valve 15, control valve 19 in FIG. 1) on the second inlet pipeline 14, the gas lift pipeline 18; after the gas enters the first inlet pipeline 1, part of it enters the first compression cylinder 11 and the second compression cylinder 13 respectively through the first branch 9, is pressurized, enters the inter-stage filter 8, and is filtered and buffered, and then the gas is exported through the mixed transport pipeline 5; another part enters the third compression cylinder 17 and the fourth compression cylinder 22 respectively through the second branch 7, is pressurized, and is exported through the fifth branch 23, the sixth branch 21 and the mixed transport pipeline 5. The gas pressurized by the third hydraulic cylinder 17 enters the sixth branch 21 through a three-way joint, and is then exported through the fifth branch 23 and the mixed transport pipeline 5 in turn; the gas pressurized by the fourth hydraulic cylinder 22 is directly exported through the fifth branch 23 and the mixed transport pipeline 5. Through method one, the four compression cylinders can be used for external transport pressurization. In this method, by opening the control valve 15 on the second inlet pipeline 14, closing the control valve on the second branch 7 and the interface connecting the inter-stage filter 8 and the mixed transport pipeline 5, the gas pressurized by the first compression cylinder 11 and the second compression cylinder 13 can be introduced into the second compression unit through the inter-stage filter 8 and the second inlet pipeline 14 for two-stage pressurization, and then the gas with higher pressure is exported through the mixed transport pipeline 5.

[0029] Method two, suitable for the scene of simultaneously carrying out mixed transport and gas lift, including: opening the control valves (control valve 3, control valve 10, control valve 12, control valve 6, control valve 16, control valve 21, control valve 19 in FIG. 1) on the first inlet pipeline 1, the first branch 9, the second branch 7, the sixth branch 21 and the gas lift pipeline 18, closing the control valves (control valve 15, control valve 23 in FIG. 1) on the second inlet pipeline 14 and the fifth branch 23; after the gas enters the first inlet pipeline 1, part of it enters the first compression cylinder 11 and the second compression cylinder 13 respectively through the first branch 9, is pressurized, enters the inter-stage filter 8, and is filtered and buffered, and then the gas is exported through the mixed transport pipeline 5; another part enters the third compression cylinder 17 and the fourth compression cylinder 22 respectively through the second branch 7, is pressurized, and is injected into the wellhead through the sixth branch 21 and the gas lift pipeline 18. The gas pressurized by the third hydraulic cylinder 17 enters the gas lift pipeline 18 through a three-way joint; the gas pressurized by the fourth hydraulic cylinder 22 enters the gas lift pipeline 18 through the sixth branch 21. Through method two, the first compression cylinder and the second compression cylinder can be used for external transport pressurization, and the third compression cylinder and the fourth compression cylinder can be used for gas lift.

[0030] Method three is suitable for simultaneous mixed transportation and gas lifting, but the required displacement for gas lifting is smaller, including: opening the control valves (control valves 3, 10, 12, 6, 16, 24, 19 in Figure 1) on the first gas inlet pipeline 1, the first branch 9, the second branch 7, the fifth branch 23 and the gas lifting pipeline 18, closing the control valves (control valves 15, 20 in Figure 1) on the second gas inlet pipeline 14 and the sixth branch; after the gas enters the first gas inlet pipeline 1, part of it enters the first compression cylinder 11 and the second compression cylinder 13 through the first branch 9 respectively, enters the inter-stage filter 8 after being pressurized, and is externally transported through the mixed transportation pipeline 5 after being filtered and buffered; the other part enters the third compression cylinder 17 and the fourth compression cylinder 22 through the second branch 7 respectively, the gas pressurized by the third compression cylinder 17 is injected into the wellhead through the gas lifting pipeline 18, and the gas pressurized by the fourth compression cylinder 22 is externally transported through the fifth branch 23 and the mixed transportation pipeline 5; the first compression cylinder 11, the second compression cylinder 13 and the fourth compression cylinder 33 are used for external transportation and pressurization, and the third compression cylinder 17 is used for gas lifting.

[0031] In the above method, the gas source comes from the Christmas tree, the production pipeline or the venting pipeline at the wellhead, different types of operations such as wellhead natural gas recovery, pressurization, gas lifting and filling can be carried out, the four compression cylinders operate independently, and after cooperation, pure mixed transportation or mixed transportation while lifting can be realized at the same time; at the same time, the role of the gas lifting cylinder body can be changed according to the field gas lifting requirements, and a single cylinder body can be selected to start and stop, and other cylinder bodies work unaffected.

[0032] Although the embodiments of the present application have been disclosed as above, they are not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application, and other modifications can be easily realized by those skilled in the art, therefore, the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A multi-functional integrated compressor system, characterized in that, include: First intake pipeline, second intake pipeline, first compressor unit, interstage filter, second compressor unit, mixing pipeline, air lift pipeline; The inlet of the first air inlet pipeline is connected to the wellhead's gas production tree, production pipeline, or venting pipeline; the outlet of the first air inlet pipeline branches into a first branch and a second branch, which are respectively connected to the first compressor unit and the second compressor unit; the output end of the first compressor unit is connected to the interstage filter; the outlet of the interstage filter is respectively connected to the mixed transport pipeline and the second air inlet pipeline; the second air inlet pipeline is connected to the second compressor unit; the output end of the second compressor unit is respectively connected to the gas lift pipeline and the mixed transport pipeline; control valves are installed on the first air inlet pipeline, the first branch, the second branch, the second air inlet pipeline, and the gas lift pipeline.

2. The multifunctional integrated compressor system as described in claim 1, characterized in that, The first compressor unit includes a first compressor cylinder and a second compressor cylinder connected in parallel, and the second compressor unit includes a third compressor cylinder and a fourth compressor cylinder connected in parallel; the output ends of the first compressor cylinder and the second compressor cylinder are both connected to the interstage filter; the second intake pipeline branches into a third branch and a fourth branch, which are respectively connected to the third compressor cylinder and the fourth compressor cylinder.

3. The multifunctional integrated compressor system as described in claim 2, characterized in that, The output end of the fourth compression cylinder branches into a fifth branch and a sixth branch. The pipeline connected to the output end of the third compression cylinder and the sixth branch are both connected to the air lift pipeline through a tee joint. The fifth branch is connected to the mixing pipeline. The control valve is installed on both the fifth branch and the sixth branch.

4. The multifunctional integrated compressor system as described in claim 1, characterized in that, A filter separator is installed on the first air intake line.

5. The multifunctional integrated compressor system as described in claim 1, characterized in that, Flow meters are installed on the first air intake line, the first branch line, the second branch line, the second air intake line, the mixed transport line, and the air lift line; pressure sensors are installed on the air inlet of the first air intake line, the exhaust port of the mixed transport line, and the exhaust port of the air lift line.

6. The multifunctional integrated compressor system as described in claim 1, characterized in that, The first intake pipeline, the second intake pipeline, the first compressor unit, the interstage filter, the second compressor unit, the mixing pipeline, and the air lift pipeline are all integrated into the housing; the housing includes an inner layer, an outer layer, and a sandwich layer sandwiched between the two, the sandwich layer being a damping functional composite material.

7. The multifunctional integrated compressor system as described in claim 2, characterized in that, The first compression cylinder, the second compression cylinder, the third compression cylinder, and the fourth compression cylinder are all equipped with cooling devices.

8. The control method for the multifunctional integrated compressor system as described in claim 3, characterized in that, include: Open the control valves on the first intake line, the first branch, the second branch, the fifth branch, and the sixth branch, and close the control valves on the second intake line and the air lift line; After the incoming air enters the first intake pipeline, part of it enters the first and second compression cylinders through the first branch, and after being pressurized, it enters the interstage filter. After filtration and buffering, the gas is discharged through the mixed transmission pipeline. The other part enters the third and fourth compression cylinders through the second branch, and after being pressurized, it is discharged through the fifth and sixth branches and the mixed transmission pipeline.

9. The control method for the multifunctional integrated compressor system as described in claim 3, characterized in that, include: Open the control valves on the first intake line, the first branch, the second branch, the sixth branch, and the air lift line; close the control valves on the second intake line and the fifth branch. After the incoming air enters the first intake pipeline, a portion of it enters the first compression cylinder and the second compression cylinder through the first branch. After being pressurized, it enters the interstage filter. After filtration and buffering, the gas is transported out through the mixing pipeline. The other part enters the third and fourth compression cylinders via the second branch, and after being pressurized, it is injected into the wellhead via the sixth branch and the gas lift pipeline.

10. The control method for the multifunctional integrated compressor system as described in claim 3, characterized in that, include: Open the control valves on the first intake line, the first branch, the second branch, the fifth branch, and the air lift line; close the control valves on the second intake line and the sixth branch. After the incoming air enters the first intake pipeline, a portion of it enters the first compression cylinder and the second compression cylinder through the first branch. After being pressurized, it enters the interstage filter. After filtration and buffering, the gas is transported out through the mixing pipeline. Another portion enters the third and fourth compression cylinders via the second branch. The gas pressurized by the third compression cylinder is injected into the wellhead via the gas lift pipeline, and the gas pressurized by the fourth compression cylinder is transported out via the fifth branch and the mixed transport pipeline.

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