Integrated compressor equipment for gas lift pressurization and CNG (compressed natural gas) recovery

Abstract

The utility model relates to the technical field of natural gas extraction equipment, and discloses integrated compressor equipment for gas lift pressurization and CNG recovery. The reciprocating piston type compressor is arranged on the skid seat, the natural gas engine is arranged on the skid seat, the mixed transportation separator is arranged on the skid seat and located on the upstream of the reciprocating piston type compressor, and the air inlet separator is arranged on the skid seat and used for separating gas and interstage condensed liquid for the reciprocating piston type compressor. And the output shaft of the natural gas engine is in transmission connection with the reciprocating piston type compressor to provide power for the reciprocating piston type compressor, so that equipment matched with the compressor is integrated on the skid-mounted seat, the standardization and skid-mounted level of the equipment matched with the compressor are improved, the investment cost of new construction or transformation is greatly reduced, and the construction period is shortened. And meanwhile, the integrated compressor equipment can also achieve a gas lift function, so that the application range of the integrated compressor equipment is widened, and the flexibility of the integrated compressor equipment is greatly improved.

Description

Technical Field

[0001] The present application belongs to the technical field of natural gas extraction equipment, and specifically relates to an integrated compressor device for gas lift pressurization and CNG recovery. Background Art

[0002] With the continuous exploitation of natural gas and oil fields, the wellhead production pressure and output have gradually decreased. Most terminal wellhead pressures have dropped to 1.0 MPaG and below. At the same time, the amount of bottom hole liquid production has increased during the production process, and the wellbore liquid accumulation phenomenon is serious. Most gas wells can no longer produce by gravity, causing the natural gas production to gradually decrease until it is stopped, resulting in serious waste of resources.

[0003] At present, due to the instability of wellhead operating conditions and the complexity and diversity of field conditions, the existing compressor supporting equipment can no longer fully adapt to the changes in wellhead operating conditions and on-site mining conditions, requiring a large number of supporting equipment. This leads to the disadvantages of low standardization and skid-mounting of compressor supporting equipment, a small scope of application, poor flexibility, and high investment costs for new construction or renovation. Especially in the mining process of most marginal wells and terminal wells, the above-mentioned disadvantages are more prominent. Utility Model Content

[0004] The present application provides an integrated compressor device for gas lift boosting and CNG recovery, so as to improve the standardization and skid-mounting level of compressor supporting equipment, increase the scope of application and flexibility of compressor supporting equipment, and reduce the investment cost of new construction or renovation.

[0005] The technical solutions adopted in this application are:

[0006] An integrated compressor device for gas lift pressurization and CNG recovery includes a skid, a reciprocating piston compressor mounted on the skid, a natural gas engine mounted on the skid, a mixed flow separator mounted on the skid and upstream of the reciprocating piston compressor, and an intake air separator mounted on the skid and used to separate gas and interstage condensed liquid for the reciprocating piston compressor. The output shaft of the natural gas engine is in driving connection with the reciprocating piston compressor to provide power for the reciprocating piston compressor.

[0007] By adopting the technical scheme, when the integrated compressor device is used, the natural gas in the gas well enters the external delivery pipeline, the natural gas entering the external delivery pipeline enters the mixed delivery separator, so that the mixed delivery separator separates the natural gas into gas and liquid, and the separated gas enters the reciprocating piston compressor and is compressed by the compressor. Since the processing capacity of the reciprocating piston compressor for the natural gas is greater than the original gas discharge capacity of the gas well, the pressure of the natural gas at the wellhead of the gas well is reduced, the pressure difference between the formation and the wellhead is increased, the production balance is achieved, the formation pressure is released to a greater extent, the abandoned well pressure is reduced, the recovery period is prolonged, the gas well productivity is increased, the return on investment is increased, and the functions of pressure reduction and production increase are realized. Meanwhile, the integrated compressor device can also deliver high-pressure gas to the gas well to realize the gas lift function, thereby increasing the application range of the integrated compressor device and greatly improving the flexibility of the integrated compressor device.

[0008] Since the reciprocating piston compressor, the natural gas engine, the mixed delivery separator and the gas inlet separator in the application are arranged on the skid, the devices matched with the compressor are integrated on the skid, thereby improving the standardization of the matched devices of the compressor and the skid level. In addition, when the integrated compressor device is used, only simple tamping treatment is required for the installation position or the integrated compressor device is installed in the hopper of a vehicle, thereby greatly reducing the investment cost of new construction or reconstruction and greatly shortening the construction period.

[0009] Optionally, the reciprocating piston compressor is a two-row four-stage compressor, and the gas inlet separator includes a second-stage gas inlet separator for separating the second-stage gas inlet of the reciprocating piston compressor, a third-stage gas inlet separator for separating the third-stage gas inlet of the reciprocating piston compressor, and a fourth-stage gas inlet separator for separating the fourth-stage gas inlet of the reciprocating piston compressor.

[0010] By adopting the technical scheme, since the reciprocating piston compressor in the application adopts a two-row four-stage compressor, the pressure boosting effect on the natural gas is greatly improved, the pressure difference between the formation and the wellhead is greatly increased, the production balance is further achieved, the formation pressure is released to a greater extent, the abandoned well pressure is reduced, the recovery period is greatly prolonged, and the return on investment is further increased. Since the gas inlet separator includes the second-stage gas inlet separator, the third-stage gas inlet separator and the fourth-stage gas inlet separator, the compression effect of the reciprocating piston compressor on the gas is further improved.

[0011] Optionally, the integrated compressor device further includes an air cooler arranged on the skid, and the air cooler is used for cooling the second-stage gas inlet, the third-stage gas inlet and the fourth-stage gas inlet of the reciprocating piston compressor.

[0012] By adopting the above technical solution, since the air cooler is used to cool the secondary air intake, tertiary air intake and quaternary air intake of the reciprocating piston compressor, the compression effect of the reciprocating piston compressor on the gas is further improved, thereby further increasing the pressure difference between the formation and the wellhead, further extending the recovery cycle of the gas well, and further improving the return on investment.

[0013] Optionally, the air cooler has a fan, the output shaft of the natural gas engine is drivingly connected to the rotating shaft of the fan, and the air cooler is located on the side of the natural gas engine and the reciprocating piston compressor.

[0014] By adopting the above technical solution, since the output shaft of the natural gas engine is connected to the rotating shaft of the fan, the natural gas engine provides kinetic energy to the fan of the air cooler, thereby reducing the investment cost of the driving equipment and rationally utilizing the kinetic energy of the natural gas engine to achieve the effect of energy saving and environmental protection; at the same time, the air cooler is located on the side of the natural gas engine and the reciprocating piston compressor, thereby enabling the air cooler to cool the natural gas engine and the reciprocating piston compressor, thereby greatly reducing the operating temperature of the natural gas engine and the reciprocating piston compressor, thereby ensuring the working efficiency of the natural gas engine and the reciprocating piston compressor.

[0015] Optionally, the mixed flow separator is connected to a liquid storage tank and an air intake buffer tank, the air intake buffer tank is connected to the reciprocating piston compressor and is located upstream of the reciprocating piston compressor, so that the gas separated by the mixed flow separator enters the reciprocating piston compressor through the air intake buffer tank, and the liquid storage tank is connected to the air intake separator, so that the liquid separated by the mixed flow separator and the air intake separator enters the liquid storage tank for storage.

[0016] By adopting the above technical solution, the gas separated by the mixed flow separator enters the air intake buffer tank for buffering and then enters the reciprocating piston compressor, which then compresses the gas, and the liquid separated by the mixed flow separator and the air intake separator enters the liquid storage tank, so that the separated liquid is stored in the liquid storage tank, so as to avoid the need to set up sewage treatment equipment at the well site for liquid discharge, thereby reducing the cost of natural gas extraction.

[0017] Optionally, the natural gas engine has an exhaust pipe, and a flame arrester is provided at the end of the exhaust pipe.

[0018] By adopting the above technical solution, since a flame arrester is provided at the end of the exhaust pipe, the safety hazard of possible fire source in the high-temperature flue gas is eliminated, thereby ensuring the normal operation of the integrated compressor equipment and greatly improving the safety of gas well mining.

[0019] Optionally, a base is provided at the bottom of the reciprocating piston compressor, and the base is provided on the skid and a vibration-damping layer is provided between the base and the skid.

[0020] By adopting the above technical solution, since the vibration-damping layer is located between the base and the sled, the vibration-damping layer isolates the vibration between the base and the sled, thereby reducing the risk of the sled vibrating due to the vibration generated by the reciprocating piston compressor during operation. As a result, the sled remains stable, ensuring the stability of the connection between other equipment installed on the sled and the sled, and greatly reducing the failure rate of the integrated compressor equipment.

[0021] Optionally, the skid is provided with a soundproof protective cover, and the soundproof protective cover and the skid together form a accommodating space, and the reciprocating piston compressor, the natural gas engine, the mixed flow separator and the intake separator are all located inside the accommodating space.

[0022] By adopting the above technical solution, since the reciprocating piston compressor, natural gas engine, mixed flow separator and air intake separator are all located inside the accommodating space, on the one hand, the sound insulation protective cover can isolate the sound generated by the reciprocating piston compressor, natural gas engine, mixed flow separator and air intake separator during operation, so as to reduce the noise at the well site and thus improve the comfort of the staff; on the other hand, the sound insulation protective cover can protect the reciprocating piston compressor, natural gas engine, mixed flow separator and air intake separator to avoid damage to the reciprocating piston compressor, natural gas engine, mixed flow separator and air intake separator by gravel or other objects, thereby ensuring the service life of the integrated compressor equipment.

[0023] Optionally, ventilation holes are provided at both ends of the sound insulation protective cover, and shutters are provided at the ventilation holes.

[0024] By adopting the above technical solution, since ventilation holes are provided at both ends of the sound insulation protective cover, the air in the accommodating space can be exchanged with the external air to replenish fresh air in the accommodating space, thereby ensuring the normal operation and combustion efficiency of the natural gas engine, and at the same time, it can also play a role in cooling down the various components in the accommodating space; in addition, shutters are provided at the ventilation holes, which can filter the air entering the accommodating space to a certain extent to ensure the cleanliness of the interior of the accommodating space.

[0025] Optionally, the integrated compressor device further comprises a sound insulation protective cover provided on the skid seat, and a plurality of doors capable of opening and closing are provided on both sides of the sound insulation protective cover;

[0026] And / or, the output shaft of the natural gas engine is drivingly connected to the reciprocating piston compressor via a coupling, and the skid is provided with a shield covering the coupling.

[0027] By adopting the above technical solution, since doors that can be opened and closed are provided on both sides of the sound insulation protective cover, the staff can inspect the components in the accommodating space by opening the door, thereby facilitating the inspection of the integrated compressor equipment.

[0028] Since the output shaft of the natural gas engine is connected to the reciprocating piston compressor through a coupling, the transmission efficiency between the natural gas engine and the reciprocating piston compressor is guaranteed, and the protective cover is provided on the coupling, so that the protective cover can protect the coupling, thereby increasing the safety of the integrated compressor equipment.

[0029] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0030] The integrated compressor equipment in this application integrates a reciprocating piston compressor, a natural gas engine, a mixed flow separator, and an intake separator into a skid, so that all the equipment supporting the compressor is integrated into the skid, thereby improving the standardization and skid-mounting level of the compressor supporting equipment. In addition, when using the integrated compressor equipment in this application, it is only necessary to perform a simple tamping treatment on the installation position or install the integrated compressor equipment in the cargo box of the vehicle, so as to greatly reduce the investment cost of new construction or renovation, and greatly shorten the construction period. At the same time, the integrated compressor equipment in this application can also realize the gas lift function, thereby increasing the scope of application of the integrated compressor equipment and greatly improving the flexibility of the integrated compressor equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 This is a structural diagram of the integrated compressor device according to one embodiment of the present application, in which the sound insulation protective cover is omitted;

[0033] Figure 2 This is a schematic structural diagram of the integrated compressor device according to one embodiment of the present application from another perspective, in which the sound insulation protective cover is omitted;

[0034] Figure 3 This is another perspective structural diagram of the integrated compressor device according to one embodiment of the present application, in which the sound insulation protective cover is omitted;

[0035] Figure 4 This is a structural schematic diagram of the integrated compressor equipment described in one embodiment of the present application.

[0036] Reference numerals:

[0037] 1. Skid; 2. Reciprocating piston compressor; 3. Natural gas engine; 4. Mixed flow separator; 5. Secondary air intake separator; 6. Third-stage air intake separator; 7. Fourth-stage air intake separator; 8. Air cooler; 9. Air intake buffer tank; 10. Soundproof protective cover; 11. Shutters; 12. Door. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0039] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features of each embodiment may be combined with each other unless there is a conflict.

[0040] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0041] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0043] Reference Figures 1 to 4 Disclosed is an integrated compressor device for gas lift boosting and CNG recovery, which includes a skid 1, a reciprocating piston compressor 2 disposed on the skid 1, a natural gas engine 3 disposed on the skid 1, a mixed flow separator 4 disposed on the skid 1 and upstream of the reciprocating piston compressor 2, and an intake separator disposed on the skid 1 and used to separate gas and interstage condensed liquid for the reciprocating piston compressor 2. The output shaft of the natural gas engine 3 is transmission-connected to the reciprocating piston compressor 2 to provide power for the reciprocating piston compressor 2.

[0044] When using the integrated compressor equipment in the present application, the natural gas in the gas well enters the external transmission pipeline, and the natural gas entering the external transmission pipeline enters the mixed transmission separator 4, so that the mixed transmission separator 4 separates the natural gas into gas and liquid, and the separated gas enters the reciprocating piston compressor 2 and is compressed by the compressor; because the reciprocating piston compressor 2 processes more natural gas than the original gas discharge of the gas well, when the integrated compressor equipment is running, the pressure of the natural gas at the wellhead of the gas well will be reduced, the pressure difference between the formation and the wellhead will be increased, and production balance will be achieved, so that the formation pressure can be released to a greater extent, the pressure of the abandoned well will be reduced, the recovery cycle will be extended, and the production capacity of the gas well will be increased, so as to increase the return on investment and realize the function of reducing pressure and increasing production.

[0045] At the same time, the integrated compressor equipment in this application can also realize the gas lift function by delivering high-pressure gas to the gas well, so that the accumulated liquid in the gas well is discharged, thereby increasing the application scope of the integrated compressor equipment and greatly improving the flexibility of the integrated compressor equipment.

[0046] Since the reciprocating piston compressor 2, the natural gas engine 3, the mixed transport separator 4 and the intake separator in the present application are all arranged on the skid 1, the equipment matched with the compressor is integrated on the skid 1, so as to improve the standardization of the matched equipment of the compressor and the skid level. In addition, when the integrated compressor equipment in the present application is used, only simple ramming treatment is needed for the installation position or the integrated compressor equipment is installed into the hopper of the vehicle, so as to greatly reduce the investment cost of new construction or reconstruction and greatly shorten the construction period.

[0047] In addition, a high-pressure dehydration skid matched with the integrated compressor equipment in the present application can be provided, so that the gas compressed by the reciprocating piston compressor 2 enters the high-pressure dehydration skid, the high-pressure dehydration skid deeply dehydrates the gas to below -62℃ of the normal pressure dew point, so as to directly provide raw materials for the natural gas generator set of the well site, to supply power to each electric equipment of the well site, to avoid the situation that the power transmission line needs to be erected on site, to reduce the exploitation difficulty of the gas well, to reduce the infrastructure construction of the ground engineering, to greatly reduce the total investment cost and the construction period, and to directly fill the deeply dehydrated natural gas into the CNG tank car, so as to reduce the waste of natural gas venting and to improve the economic value.

[0048] In a preferred embodiment, referring to Figures 1 to 3 , the reciprocating piston compressor 2 is a two-row four-stage compressor, and the intake separator includes a two-stage intake separator 5 for gas-liquid separation of two-stage intake of the reciprocating piston compressor 2, a three-stage intake separator 6 for gas-liquid separation of three-stage intake of the reciprocating piston compressor 2, and a four-stage intake separator 7 for gas-liquid separation of four-stage intake of the reciprocating piston compressor 2.

[0049] Since the reciprocating piston compressor 2 in the present application adopts a two-row four-stage compressor, the pressurization effect on the natural gas is greatly improved, so as to greatly increase the pressure difference between the formation and the wellhead, to further achieve production balance, to release the formation pressure to a greater extent, to reduce the waste well pressure, to greatly prolong the recovery period, and to further increase the investment return rate. Since the intake separator includes the two-stage intake separator 5, the three-stage intake separator 6 and the four-stage intake separator 7, the compression effect of the reciprocating piston compressor 2 on the gas is further improved.

[0050] Further, referring to Figures 1 to 3 , the integrated compressor equipment further includes an air cooler 8 arranged on the skid 1, the air cooler 8 is used for cooling the two-stage intake, the three-stage intake and the four-stage intake of the reciprocating piston compressor 2, so as to further improve the compression effect of the reciprocating piston compressor 2 on the gas, to further increase the pressure difference between the formation and the wellhead, to further prolong the recovery period of the gas well, and to further improve the investment return rate.

[0051] It can be understood that the gas compressed by the reciprocating piston compressor 2 in the first stage first enters the air cooler 8 so that the air cooler 8 cools the compressed gas, and then enters the reciprocating piston compressor 2 for the second stage compression; the gas compressed by the reciprocating piston compressor 2 in the second stage enters the air cooler 8 again so that the air cooler 8 cools the compressed gas, and then enters the reciprocating piston compressor 2 for the third stage compression; the gas compressed by the reciprocating piston compressor 2 in the third stage first enters the air cooler 8 so that the air cooler 8 cools the compressed gas, and then enters the reciprocating piston compressor 2 for the fourth stage compression.

[0052] The present application does not make any specific limitation on the structure of the air cooler 8. Preferably, the air cooler 8 has a fan, and the output shaft of the natural gas engine 3 is transmission-connected to the rotating shaft of the fan, so that the natural gas engine 3 provides kinetic energy for the fan of the air cooler 8, thereby reducing the investment cost of the driving equipment and rationally utilizing the kinetic energy of the natural gas engine 3 to achieve energy saving and environmental protection; the air cooler 8 is located on the side of the natural gas engine 3 and the reciprocating piston compressor 2, so that the air cooler 8 can cool the natural gas engine 3 and the reciprocating piston compressor 2, thereby greatly reducing the operating temperature of the natural gas engine 3 and the reciprocating piston compressor 2, thereby ensuring the working efficiency of the natural gas engine 3 and the reciprocating piston compressor 2.

[0053] In other embodiments, the air cooler 8 may also have a fan with its own power source, so that the air cooler 8 works using its own power source.

[0054] In a preferred embodiment, referring to Figures 1 to 3 The mixed flow separator 4 is connected to a liquid storage tank and an air intake buffer tank 9. The air intake buffer tank 9 is connected to the reciprocating piston compressor 2 and is located upstream of the reciprocating piston compressor 2, so that the gas separated by the mixed flow separator 4 enters the reciprocating piston compressor 2 through the air intake buffer tank 9. The liquid storage tank is connected to the air intake separator so that the liquid separated by the mixed flow separator 4 and the air intake separator enters the liquid storage tank for storage, so that the separated liquid is stored in the liquid storage tank to avoid the need to set up sewage treatment equipment at the well site for liquid discharge, thereby reducing the cost of natural gas extraction.

[0055] Specifically, the natural gas in the gas well enters the mixed transmission separator 4 through the external transmission pipeline for gas-liquid separation, the liquid flows into the liquid storage tank, the gas enters the gas buffer tank 9, and then enters the reciprocating piston compressor 2 for one-stage compression. The gas after the one-stage compression enters the two-stage air intake separator 5, so that the two-stage air intake separator 5 separates the gas and the inter-stage condensed liquid; the separated gas enters the air cooler 8 for cooling and then enters the reciprocating piston compressor 2 for two-stage compression. The gas after the two-stage compression enters the three-stage air intake separator 6, so that the three-stage air intake separator 6 separates the gas and the inter-stage condensed liquid; the separated gas enters the air cooler 8 for cooling and then enters the reciprocating piston compressor 2 for three-stage compression. The gas after the three-stage compression enters the four-stage air intake separator 7, so that the four-stage air intake separator 7 separates the gas and the inter-stage condensed liquid; the separated gas enters the air cooler 8 for cooling and then enters the reciprocating piston compressor 2 for four-stage compression to complete the compression of the gas.

[0056] It is understood that the integrated compressor device in this application has an air inlet, a mixed output outlet, a gas lift gas outlet, and a CNG outlet. The compressed gas can be transported to the gas well via the gas lift gas outlet and the gas lift distribution pipeline of the gas well to achieve the gas lift function, thereby discharging the accumulated liquid in the gas well; the compressed gas can also enter the downstream of the gas well external transmission pipeline via the mixed output outlet to increase the pressure difference between the formation and the wellhead, thereby extending the recovery period; the compressed gas can also enter the high-pressure dehydration skid equipped with the integrated compressor device via the CNG outlet, so that the high-pressure dehydration skid can deeply dehydrate the gas so that the natural gas can be directly used.

[0057] It should be noted that the present application does not make any specific limitation on the structure of the liquid storage tank. It can be a tank structure for storing liquid that comes with the mixed-transfer separator 4, or it can be a tank structure separately provided on the skid 1.

[0058] Furthermore, the liquid storage tank is provided with a liquid level sensor for detecting the volume of the liquid in the liquid storage tank, and the liquid storage tank can be connected to the external transmission pipeline of the reciprocating piston compressor 2. When the liquid level sensor detects that there is a lot of liquid in the liquid storage tank, the liquid in the liquid storage tank enters the external transmission pipeline of the reciprocating piston compressor 2, so that the liquid and the pressurized gas enter the external transmission pipeline together and are input into the downstream pipeline network.

[0059] In a preferred embodiment, the natural gas engine 3 has an exhaust pipe, and a flame arrester is provided at the end of the exhaust pipe, thereby eliminating the safety hazard of fire source in the high-temperature flue gas to ensure the normal operation of the integrated compressor equipment, while greatly improving the safety of gas well mining.

[0060] In a preferred embodiment, a base is provided at the bottom of the reciprocating piston compressor 2, and the base is provided on the skid 1. A vibration-damping layer is provided between the base and the skid 1, so that the vibration-damping layer isolates the vibration between the base and the skid 1, thereby reducing the risk of vibration of the skid 1 caused by the vibration generated during operation of the reciprocating piston compressor 2, thereby keeping the skid 1 stable, thereby ensuring the connection stability between other equipment installed on the skid 1 and the skid 1, and greatly reducing the failure rate of the integrated compressor equipment.

[0061] The present application does not specifically limit the formation method of the vibration damping layer. Preferably, the vibration damping layer is formed by solidifying the epoxy resin poured between the base and the sled 1. In other embodiments, the vibration damping layer can also be formed by a vibration damping pad located between the base and the sled 1.

[0062] In a preferred embodiment, referring to Figure 4 The skid 1 is provided with a sound insulation protective cover 10, which together with the skid 1 forms an accommodating space. The reciprocating piston compressor 2, the natural gas engine 3, the mixed flow separator 4 and the air intake separator are all located inside the accommodating space. On the one hand, the sound insulation protective cover 10 can isolate the sound generated by the reciprocating piston compressor 2, the natural gas engine 3, the mixed flow separator 4 and the air intake separator during operation, so as to reduce the noise at the well site and thus improve the comfort of the staff. On the other hand, the sound insulation protective cover 10 can protect the reciprocating piston compressor 2, the natural gas engine 3, the mixed flow separator 4 and the air intake separator to avoid damage to the reciprocating piston compressor 2, the natural gas engine 3, the mixed flow separator 4 and the air intake separator by gravel or other objects, thereby ensuring the service life of the integrated compressor equipment.

[0063] It can be understood that, except for the skid 1 and the sound insulation protective cover 10, all other components of the integrated compressor equipment are located in the accommodating space.

[0064] Further, refer to Figure 4 Both ends of the sound insulation protective cover 10 are provided with ventilation holes, so that the air in the accommodating space can be exchanged with the external air to replenish fresh air in the accommodating space, thereby ensuring the normal operation and combustion efficiency of the natural gas engine 3, and at the same time, it can also play a role in cooling down the various components in the accommodating space; shutters 11 are provided at the ventilation holes, which can filter the air entering the accommodating space to a certain extent to ensure the cleanliness of the interior of the accommodating space.

[0065] Furthermore, a ventilation fan is provided inside the soundproof protective cover 10, and the direction of the airflow generated by the ventilation fan is parallel to the flow direction of the gas entering the soundproof protective cover 10 through the ventilation port, so that airflow is formed in the accommodating space, thereby further improving the combustion efficiency of the natural gas engine 3 and improving the cooling effect of various components in the accommodating space.

[0066] In a preferred embodiment, referring to Figure 4 The integrated compressor equipment also includes a sound insulation protection cover 10 covered on the skid seat 1. Both sides of the sound insulation protection cover 10 are provided with a plurality of doors 12 that can be opened and closed, so that the staff can inspect the components in the accommodating space by opening the door 12, so as to facilitate the inspection and maintenance of the integrated compressor equipment.

[0067] Furthermore, each corner of the sound insulation protective cover 10 is provided with a hoisting piece for hanging a hoisting device, so as to facilitate the hoisting of the integrated compressor equipment.

[0068] Furthermore, a lighting lamp is provided in the sound insulation protective cover 10 so that the lighting lamp can illuminate the accommodating space, thereby making it easier for staff to inspect and repair various components in the accommodating space.

[0069] Furthermore, a combustible gas probe is provided in the soundproof protective cover 10, and the combustible gas probe has an alarm system to monitor the combustible gas situation inside the accommodating space in real time, thereby ensuring the safety of the integrated compressor equipment.

[0070] In a preferred embodiment, the output shaft of the natural gas engine 3 is connected to the reciprocating piston compressor 2 through a coupling, thereby ensuring the transmission efficiency between the natural gas engine 3 and the reciprocating piston compressor 2; the skid 1 is provided with a shield covering the coupling, so that the shield can protect the coupling, thereby increasing the safety of the integrated compressor equipment.

[0071] It should be noted that the integrated compressor equipment in the present application also includes other auxiliary systems arranged on the skid 1, such as a lubrication system for lubricating the natural gas engine 3, a PLC control system for controlling the operation of various components of the integrated compressor equipment, a fuel supply system for providing fuel to the natural gas engine 3, a gas power generation system for powering the electrical components of the integrated compressor equipment, and the like.

[0072] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0073] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0074] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. An integrated compressor device for gas lift boosting and CNG recovery, characterized in that: The invention comprises a skid (1), a reciprocating piston compressor (2) arranged on the skid (1), a natural gas engine (3) arranged on the skid (1), a mixed flow separator (4) arranged on the skid (1) and located upstream of the reciprocating piston compressor (2), and an intake separator arranged on the skid (1) and used for separating gas and interstage condensed liquid for the reciprocating piston compressor (2). The output shaft of the natural gas engine (3) is in driving connection with the reciprocating piston compressor (2) to provide power for the reciprocating piston compressor (2).

2. The integrated compressor equipment for gas lift boosting and CNG recovery according to claim 1, characterized in that: The reciprocating piston compressor (2) is a two-row four-stage compressor, and the air intake separator comprises a two-stage air intake separator (5) for performing gas-liquid separation for the two-stage air intake of the reciprocating piston compressor (2), a three-stage air intake separator (6) for performing gas-liquid separation for the three-stage air intake of the reciprocating piston compressor (2), and a four-stage air intake separator (7) for performing gas-liquid separation for the four-stage air intake of the reciprocating piston compressor (2).

3. The integrated compressor equipment for gas lift boosting and CNG recovery according to claim 2, characterized in that: The integrated compressor device further comprises an air cooler (8) arranged on the skid (1), and the air cooler (8) is used to cool the secondary air intake, the tertiary air intake and the quaternary air intake of the reciprocating piston compressor (2).

4. The integrated compressor equipment for gas lift boosting and CNG recovery according to claim 3, characterized in that: The air cooler (8) has a fan, the output shaft of the natural gas engine (3) is transmission-connected to the rotating shaft of the fan, and the air cooler (8) is located on the side of the natural gas engine (3) and the reciprocating piston compressor (2).

5. The integrated compressor equipment for gas lift boosting and CNG recovery according to claim 1, characterized in that: The mixed flow separator (4) is connected to a liquid storage tank and an air intake buffer tank (9). The air intake buffer tank (9) is connected to the reciprocating piston compressor (2) and is located upstream of the reciprocating piston compressor (2), so that the gas separated by the mixed flow separator (4) enters the reciprocating piston compressor (2) through the air intake buffer tank (9). The liquid storage tank is connected to the air intake separator, so that the liquid separated by the mixed flow separator (4) and the air intake separator enters the liquid storage tank for storage.

6. The integrated compressor equipment for gas lift boosting and CNG recovery according to claim 1, characterized in that: The natural gas engine (3) has an exhaust pipe, and a flame arrester is provided at the end of the exhaust pipe.

7. The integrated compressor equipment for gas lift boosting and CNG recovery according to claim 1, characterized in that: A base is provided at the bottom of the reciprocating piston compressor (2), the base is provided on the skid seat (1), and a vibration-damping layer is provided between the base and the skid seat (1).

8. The integrated compressor equipment for gas lift boosting and CNG recovery according to claim 1, characterized in that: The skid (1) is provided with a soundproof protective cover (10), and the soundproof protective cover (10) and the skid (1) together form an accommodating space, and the reciprocating piston compressor (2), the natural gas engine (3), the mixed flow separator (4), and the intake separator are all located inside the accommodating space.

9. The integrated compressor equipment for gas lift pressurization and CNG recovery according to claim 8, characterized in that: Both ends of the sound insulation protective cover (10) are provided with ventilation openings, and shutters (11) are provided at the ventilation openings.

10. The integrated compressor equipment for gas lift boosting and CNG recovery according to claim 1, characterized in that: The integrated compressor device further comprises a sound insulation protective cover (10) arranged on the skid seat (1), and a plurality of doors (12) capable of opening and closing are arranged on both sides of the sound insulation protective cover (10); And / or, the output shaft of the natural gas engine (3) is transmission-connected to the reciprocating piston compressor (2) via a coupling, and the skid (1) is provided with a shield covering the coupling.

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