Pressurized gas lift reciprocating mixed transportation compressor unit for oil and gas field

Abstract

The invention discloses a pressurized gas lift reciprocating mixed transportation compressor unit for an oil and gas field, and relates to the technical field of natural gas exploitation, the pressurized gas lift reciprocating mixed transportation compressor unit comprises a compressor assembly, and the compressor assembly is composed of a multi-stage compressor used for achieving pressurization and gas lift and a natural gas engine in transmission connection with the multi-stage compressor; the fuel input end of the natural gas engine is connected with a fuel storage assembly, and the input end of the fuel storage assembly is connected with a shell assembly. An air inlet driving unit is arranged at the top of the shell assembly, and a transposition mechanism is arranged on the outer side of the air inlet driving unit in a transmission mode. Active transposition of the wet natural gas drying units can be periodically achieved, manual operation is not needed, uninterrupted continuous drying treatment of wet natural gas is achieved, meanwhile, in the switching process of the wet natural gas drying units, natural gas cannot enter the working environment, waste is avoided, and meanwhile potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas extraction, and in particular to a boosted gas lift reciprocating mixed transmission compressor unit for oil and gas fields. Background Art

[0002] The booster gas lift reciprocating mixed flow compressor unit is used for boosting and gas lift operations during the natural gas collection process. Currently, most of the booster gas lift reciprocating mixed flow compressor units on the market are driven by electric motors. Therefore, for abandoned wells and some remote marginal wells, there is often no supporting power grid in the surrounding area, and the electric motor-driven compressor consumes a lot of electricity during operation. Therefore, it is necessary to purchase a large generator set separately, resulting in too high mining costs.

[0003] To avoid the above situation, technicians in this field have thought of directly installing a natural gas engine that uses natural gas as fuel in the compressor unit to drive the compressor, so as to reduce power consumption and enable the compressor unit to operate only using its own small generator. However, since the produced natural gas contains a large amount of water and cannot be used directly as fuel, the unit needs to be equipped with corresponding wet natural gas drying equipment to achieve the drying of the wet natural gas.

[0004] For example, the invention patent with authorization announcement number CN115350570B discloses a wet natural gas drying device for natural gas liquefaction pretreatment, the purpose of which is to provide a wet natural gas drying device for natural gas liquefaction pretreatment that can pre-remove a large amount of water and droplets in natural gas. The device includes a base plate, a switching plate, and a separation box. The top of the base plate is slidably connected to the switching plate, and separation boxes are connected to both sides of the top of the switching plate.

[0005] When the above-mentioned drying equipment regenerates the molecular sieve in the left separation box, it can separate the moisture in the natural gas through the molecular sieve in the right separation box and perform drying treatment to ensure processing efficiency. However, in actual application, when the working conditions of the two separation boxes are switched, it is also necessary to actively close the vent valve on the air inlet pipe and then start the reduction motor to switch positions. During this process, since the vent valve is closed, the equipment cannot normally input natural gas, and the entire equipment is in a shutdown state, which is not conducive to uninterrupted and continuous drying treatment of wet natural gas. At the same time, during the working condition switching process, the natural gas remaining in the left separation box will enter the working environment, which not only causes waste, but also increases safety hazards in the working environment.

[0006] In addition, to avoid the roaster being installed directly inside the separation box, which would cause the moisture in the natural gas to corrode the roaster, the roaster used for molecular sieve reduction can only be installed outside the separation box. This means that during the molecular sieve reduction process, heat can only be transferred through the separation box, which not only affects the reduction efficiency of the molecular sieve, but also causes the separation box to heat up, which can easily lead to burns to the staff.

[0007] Therefore, it is necessary to invent a pressurized gas lift reciprocating mixed transmission compressor unit for oil and gas fields to solve the above problems. Summary of the Invention

[0008] The present invention aims to provide a boosted gas lift reciprocating mixed transmission compressor unit for oil and gas fields. The unit can periodically and actively switch positions of wet natural gas drying units without manual intervention, thereby achieving uninterrupted and continuous drying of wet natural gas. Furthermore, during the switching of wet natural gas drying units, natural gas is prevented from entering the working environment, thereby avoiding waste and reducing safety hazards. Furthermore, the unit can avoid erosion caused by direct contact with wet natural gas. Furthermore, the unit can directly heat the curved molecular sieve filling frame, thereby improving the reduction efficiency of the molecular sieve and preventing temperature rise in the external structure. This addresses the problem, raised in the background art above, that when switching operating modes between two separation boxes, it is necessary to actively close the vent valve on the intake pipe and then start the reduction motor to switch positions. During this process, since the vent valve is closed, the equipment cannot normally input natural gas, and the entire equipment is in a shutdown state, which is not conducive to uninterrupted and continuous drying of wet natural gas. Furthermore, during the switching of operating modes, residual natural gas in the left separation box can enter the working environment, causing waste and increasing safety hazards in the working environment.

[0009] To achieve the above objectives, the present invention provides the following technical solutions: a boosted gas lift reciprocating mixed transmission compressor unit for oil and gas fields, comprising a compressor assembly, the compressor assembly comprising a multi-stage compressor for achieving boosting and gas lift, and a natural gas engine drivingly connected to the multi-stage compressor, the fuel input end of the natural gas engine being connected to a fuel storage assembly, and the input end of the fuel storage assembly being connected to a housing assembly; An air intake drive unit is provided on the top of the shell assembly, and a shifting mechanism is provided on the outer side of the air intake drive unit. A wet natural gas drying unit for drying wet natural gas is rotatably provided inside the shell assembly. The inside and outside of the wet natural gas drying unit are jointly provided with inner and outer sealing assemblies that divide the inner cavity of the shell assembly into left and right chambers. A heating reduction assembly for heating and reducing adjacent molecular sieves is jointly provided inside the shell assembly and inside the inner and outer sealing assemblies.

[0010] Preferably, the shell assembly includes a base, a shell is fixedly provided on the top of the base, an output pipe connected to the fuel storage assembly is fixedly provided through the bottom right side of the shell, the output pipe is communicated with the right chamber inside the base, and a waste pipe is fixedly provided through the top left side of the shell, the waste pipe is communicated with the left chamber inside the base.

[0011] Preferably, the air intake drive unit includes an air intake pipe A, the bottom end of the air intake pipe A is fixedly connected to a sealing cover fixedly arranged on the top of the base, the bottom of the sealing cover is fixedly connected to the air intake pipe B, the air intake pipe B passes through the top of the base and extends to the inside of the fixed channel and is fixedly connected to the inner wall of the fixed channel, an impeller is provided on the inside of the sealing cover, a reciprocating screw is fixedly provided at the bottom of the impeller, the reciprocating screw passes through the inner wall of the air intake pipe B and extends downward and is rotatably connected to the air intake pipe B and the rotating seat through a bearing, and a driving groove is provided on the side of the reciprocating screw.

[0012] Preferably, the shifting mechanism includes a lifting plate that is sleeved on the outside of the reciprocating screw, a guide slider that is fixedly provided on the side of the lifting plate and slides along the vertical direction on the inside of the guide slot, a plurality of sliding shafts are slidingly provided on the bottom of the guide slider, a ring plate is fixedly provided on the bottom ends of the plurality of sliding shafts, a return spring is sleeved on the outside of the plurality of sliding shafts, the return spring is fixedly connected between the lifting plate and the ring plate, a rotating plate is rotatably sleeved on the bottom of the ring plate through a bearing, a driving slider that is fixedly provided on the inside of the rotating plate and slides along the vertical direction and a movable shift block is fixedly provided on the bottom of the rotating plate.

[0013] Preferably, the wet natural gas drying unit includes a rotating seat that is nested and rotatably arranged on the top of the base through a bearing, a fixed block is fixedly arranged on the top of the rotating seat, a mounting cylinder is fixedly arranged on the outer side of the top of the rotating seat, and arc-shaped molecular sieve filling mesh frames are fixedly nested on both sides of the mounting cylinder.

[0014] Preferably, the inner and outer sealing components include an inner sealing column that is rotatably arranged on the inner side of the mounting cylinder and fixedly connected to the inner wall of the base, a guide groove is provided on the inner side of the inner sealing column, and an installation cavity and a gas containing cavity are respectively provided on the left and right sides of the inner sealing column, and a fixed channel is provided through the inner top of the gas containing cavity.

[0015] Preferably, the inner and outer sealing components also include two outer sealing blocks, which are respectively slidably fitted on the front and rear sides of the mounting tube and are fixedly connected to the inner wall of the base, and seals are provided between the inner sealing column and the inner wall of the mounting tube and between the outer sealing block and the outer wall of the mounting tube.

[0016] Preferably, the heating reduction component includes two groups of heating units located on the inner and outer sides of adjacent arc-shaped molecular sieve filling frames, respectively. Any group of the heating units includes a fixed seat and a plurality of heating resistors fixedly arranged on the side of the fixed seat. One of the fixed seats is fixedly arranged on the inner side of the installation cavity, and the other fixed seat is fixedly arranged on the left side of the base.

[0017] Technical effects and advantages of the present invention:

[0018] The present invention comprises an air intake drive unit, a transposition mechanism, a wet natural gas drying unit, and inner and outer sealing assemblies. The air intake drive unit drives the input of wet natural gas into the inner and outer sealing assemblies, whereupon the wet natural gas drying unit removes water from the wet natural gas. During this process, the gas generated by the wet natural gas continuously drives the transposition mechanism via the air intake drive unit. This continuous drive periodically drives the wet natural gas drying unit to rotate and transpose, enabling molecular sieve reduction without downtime. The inner and outer sealing assemblies cooperate with the wet natural gas drying unit to divide the interior of the housing assembly into left and right chambers, allowing the heating and reduction assembly to be directly installed within the housing assembly and the inner and outer sealing assemblies. Compared to the prior art, the present invention can periodically and actively transpose the wet natural gas drying unit without manual intervention, thereby achieving uninterrupted and continuous drying of the wet natural gas. Furthermore, during the switching of the wet natural gas drying units, natural gas is prevented from entering the working environment, thereby avoiding waste and reducing safety hazards. Furthermore, direct contact with the wet natural gas, which could cause corrosion, can be avoided. Furthermore, the curved molecular sieve filling frame can be directly heated, improving the reduction efficiency of the molecular sieve while preventing external structure heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall top view of the structure of the present invention; Figure 2 It is a schematic structural diagram of the housing assembly of the present invention; Figure 3 Schematic diagram of the internal structure of the housing of the present invention; Figure 4 This is a structural diagram of the air intake drive unit of the present invention; Figure 5 Schematic diagram of the transposition mechanism structure of the present invention; Figure 6 This is a schematic structural diagram of the wet natural gas drying unit of the present invention; Figure 7 This is a schematic structural diagram of the inner and outer sealing components and the heating and reduction component of the present invention; Figure 8 This is the logical operation diagram of the multi-stage compressor of the present invention.

[0020] Figure: 1. Compressor assembly; 2. Fuel storage assembly; 3. Housing assembly; 31. Base; 32. Housing; 33. Output pipe; 34. Exhaust pipe; 4. Intake drive unit; 41. Intake pipe A; 42. Sealing cover; 43. Intake pipe B; 44. Impeller; 45. Reciprocating screw; 46. Drive chute; 5. Positioning mechanism; 51. Lifting plate; 52. Guide slider; 53. Sliding shaft; 54. Ring plate; 55. Return spring Spring; 56, rotating disk; 57, driving slider; 58, moving block; 6, wet natural gas drying unit; 61, rotating seat; 62, fixed block; 63, mounting cylinder; 64, arc-shaped molecular sieve filling frame; 7, inner and outer sealing components; 71, inner sealing column; 72, guide slide; 73, mounting cavity; 74, gas containing cavity; 75, fixed channel; 76, outer sealing block; 8, heating reduction component; 81, fixed seat; 82, heating resistor. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The present invention provides Figure 1-Figure 7 The shown embodiment shows a pressurized gas lift reciprocating mixed transmission compressor unit for oil and gas fields, comprising a compressor assembly 1, which consists of a multi-stage compressor for achieving pressurization and gas lift and a natural gas engine transmission-connected to the multi-stage compressor. The fuel input end of the natural gas engine is connected to a fuel storage assembly 2, and the input end of the fuel storage assembly 2 is connected to a shell assembly 3. An air intake drive unit 4 is provided on the top of the shell assembly 3, and a shifting mechanism 5 is provided on the outer side of the air intake drive unit 4. A wet natural gas drying unit 6 for drying wet natural gas is rotatably provided inside the shell assembly 3. The wet natural gas drying unit 6 is provided with inner and outer sealing assemblies 7 for dividing the inner cavity of the shell assembly 3 into left and right chambers. A heating and reduction assembly 8 for heating and reducing adjacent molecular sieves is provided inside the shell assembly 3 and inside the inner and outer sealing assemblies 7.

[0023] It should be noted that the compressor assembly 1 and the fuel storage assembly 2 both belong to existing disclosed technologies, so this application does not elaborate on the specific structures of the compressor assembly 1 and the fuel storage assembly 2.

[0024] like Figure 2 and Figure 3As shown, the shell assembly 3 includes a base 31, a shell 32 is fixedly provided on the top of the base 31, an output pipe 33 connected to the fuel storage assembly 2 is fixedly provided through the bottom right side of the shell 32, and the output pipe 33 is communicated with the right chamber inside the base 31, and a waste pipe 34 is fixedly provided through the top left side of the shell 32, and the waste pipe 34 is communicated with the left chamber inside the base 31.

[0025] like Figure 4 As shown, the air intake drive unit 4 includes an air intake pipe A41, the bottom end of the air intake pipe A41 is fixedly connected to a sealing cover 42 fixedly arranged on the top of the base 31, the bottom of the sealing cover 42 is fixedly connected to the air intake pipe B43, the air intake pipe B43 passes through the top of the base 31 and extends to the inside of the fixed channel 75 and is fixedly connected to the inner wall of the fixed channel 75, an impeller 44 is provided on the inside of the sealing cover 42, a reciprocating screw 45 is fixedly provided at the bottom of the impeller 44, the reciprocating screw 45 passes through the inner wall of the air intake pipe B43 and extends downward and is rotatably connected to the air intake pipe B43 and the rotating seat 61 through a bearing, and a driving slide groove 46 is provided on the side of the reciprocating screw 45.

[0026] By setting the above-mentioned shell assembly 3 and intake drive unit 4, the wet natural gas in the gas well can enter the sealing cover 42 through the intake pipe A41, and then enter the gas containing chamber 74 through the intake pipe B43. At this time, the mounting cylinder 63, the inner sealing column 71 and the outer sealing block 76 cooperate to allow the wet natural gas to pass through the adjacent arc-shaped molecular sieve filling frame 64 and enter the right chamber of the base 31. During this process, the wet natural gas is dehydrated by the molecular sieve and then input into the fuel storage assembly 2 for storage through the output pipe 33. The fuel storage assembly 2 provides fuel for the natural gas engine in the compressor assembly 1, so that the natural gas engine drives the multi-stage compressor.

[0027] like Figure 5 As shown, the shifting mechanism 5 includes a lifting plate 51 that is transmission-sleeved on the outside of the reciprocating screw 45, and a guide slider 52 that slides along the vertical direction on the inside of the guide slot 72 is fixedly provided on the side of the lifting plate 51. A plurality of sliding shafts 53 are slidingly provided at the bottom of the guide slider 52, and a ring plate 54 is fixedly provided at the bottom of the plurality of sliding shafts 53. Return springs 55 are sleeved on the outside of the plurality of sliding shafts 53, and the return spring 55 is fixedly connected between the lifting plate 51 and the ring plate 54. A rotating plate 56 is rotatably sleeved on the bottom of the ring plate 54 through a bearing, and a driving slider 57 that slides along the vertical direction on the inside of the driving slot 46 is fixedly provided on the inside of the rotating plate 56, and a movable shift block 58 is fixedly provided at the bottom of the rotating plate 56.

[0028] By arranging the above-mentioned air intake drive unit 4 and the transposition mechanism 5, the wet natural gas drives the impeller 44 to rotate continuously when passing through the sealing cover 42. When the impeller 44 rotates, the reciprocating screw 45 is driven to rotate synchronously. When the reciprocating screw 45 rotates, the lifting plate 51 guided by the guide slider 52 and the guide slot 72 is driven to move downward continuously. At the same time, the rotating plate 56 is driven to rotate continuously through the driving slot 46 and the driving slider 57. When the rotating plate 56 rotates, the movable shift block 58 at its bottom is driven to rotate synchronously. When the lifting plate 51 moves downward, the annular plate 54 is driven downward by the return spring 55. When the annular plate 54 moves downward, the rotating plate 56 is driven to move downward synchronously along the outer wall of the reciprocating screw 45. When the rotating plate 56 moves downward, it drives the driving slider 57 to descend synchronously along the driving slot 46. During this process, the rotating plate 56 continues to rotate.

[0029] like Figure 6 As shown, the wet natural gas drying unit 6 includes a rotating seat 61 which is nested and rotatably arranged on the top of the base 31 through a bearing. A fixed block 62 is fixedly arranged on the top of the rotating seat 61, and a mounting cylinder 63 is fixedly arranged on the outer side of the top of the rotating seat 61. Arc-shaped molecular sieve filling mesh frames 64 are fixedly nested on both sides of the mounting cylinder 63.

[0030] By setting up the above structure, after the movable shift block 58 pushes the fixed shift block 62 from the side of the fixed shift block 62, the fixed shift block 62 drives the rotating seat 61 to rotate. When the rotating seat 61 rotates, the two arc-shaped molecular sieve filling frames 64 are driven to rotate synchronously through the rotating seat 61 to complete the switching of the two arc-shaped molecular sieve filling frames 64, so that the unused or restored arc-shaped molecular sieve filling frame 64 is located on the right, and the arc-shaped molecular sieve filling frame 64 to be restored is located on the left, which not only ensures the normal dehydration of wet natural gas, but also allows the used molecular sieve to be heated and restored.

[0031] like Figure 7 As shown, the inner and outer sealing components 7 include an inner sealing column 71 that is rotatably arranged on the inner side of the mounting cylinder 63 and fixedly connected to the inner wall of the base 31. A guide groove 72 is provided on the inner side of the inner sealing column 71. A mounting cavity 73 and a gas accommodating cavity 74 are respectively provided on the left and right sides of the inner sealing column 71. A fixed channel 75 is provided through the top of the inner side of the gas accommodating cavity 74. The inner and outer sealing components 7 also include two outer sealing blocks 76. The two outer sealing blocks 76 are respectively slidably fitted on the front and rear sides of the mounting cylinder 63 and are both fixedly connected to the inner wall of the base 31. Seals are provided between the inner sealing column 71 and the inner wall of the mounting cylinder 63 and between the outer sealing blocks 76 and the outer wall of the mounting cylinder 63.

[0032] By setting up the above structure, the installation cylinder 63, the inner sealing column 71 and the outer sealing block 76 cooperate with each other, thereby dividing the inner cavity of the base 31 into two left and right chambers. At the same time, it is ensured that the installation cylinder 63 can rotate normally between the inner sealing column 71 and the installation cavity 73, thereby preventing the natural gas in the right chamber from entering the left chamber, providing conditions for the installation of the heating reduction assembly 8, and at the same time does not affect the transposition of the wet natural gas drying unit 6.

[0033] like Figure 7 As shown, the heating reduction component 8 includes two groups of heating units located on the inner and outer sides of adjacent arc-shaped molecular sieve filling frames 64, respectively. Any group of heating units includes a fixed seat 81 and a plurality of heating resistors 82 fixedly arranged on the side of the fixed seat 81. One fixed seat 81 is fixedly arranged on the inner side of the installation cavity 73, and the other fixed seat 81 is fixedly arranged on the left side inside the base 31.

[0034] By setting up the above structure, after the two arc-shaped molecular sieve filling frames 64 are replaced, the unused arc-shaped molecular sieve filling frame 64 is rotated to a position adjacent to the gas containing chamber 74 to continue to remove water from the wet natural gas. The used arc-shaped molecular sieve filling frame 64 is rotated between the two groups of heating units and then heated and reduced by multiple heating resistors 82 located on the inner and outer sides thereof. The two groups of heating units are positioned so as to avoid erosion caused by direct contact with the wet natural gas and to directly heat the arc-shaped molecular sieve filling frame 64, thereby improving the reduction efficiency of the molecular sieve and avoiding the temperature rise of the external structure. The waste gas generated in this process is discharged through the exhaust pipe 34.

[0035] The present invention also includes a method for using a boosted gas lift reciprocating mixed transmission compressor unit for oil and gas fields, the method specifically comprising the following steps: S1. Wet natural gas from the gas well enters the sealed cover 42 through the inlet pipe A41, and then enters the gas containing chamber 74 through the inlet pipe B43. At this time, the mounting cylinder 63, the inner sealing column 71, and the outer sealing block 76 cooperate to allow the wet natural gas to pass through the adjacent arc-shaped molecular sieve filling frame 64 and enter the right chamber of the base 31. During this process, the wet natural gas is dehydrated by the molecular sieve and then input into the fuel storage assembly 2 through the output pipe 33 for storage. The fuel storage assembly 2 provides fuel for the natural gas engine in the compressor assembly 1, which drives the multi-stage compressor. S2. When the wet natural gas passes through the sealing cover 42, it drives the impeller 44 to rotate continuously. When the impeller 44 rotates, it drives the reciprocating screw 45 to rotate synchronously. When the reciprocating screw 45 rotates, it drives the lifting plate 51 guided by the guide slider 52 and the guide groove 72 to move downward continuously. At the same time, it drives the rotating plate 56 to rotate continuously through the driving groove 46 and the driving slider 57. When the rotating plate 56 rotates, it drives the movable block 58 at the bottom to rotate synchronously. S3, when the lifting plate 51 moves downward, the return spring 55 drives the annular plate 54 downward. When the annular plate 54 moves downward, it drives the rotating plate 56 to move downward along the outer wall of the reciprocating screw 45. When the rotating plate 56 moves downward, it drives the driving slider 57 to descend along the driving chute 46. During this process, the rotating plate 56 keeps rotating. S4. As the lifting plate 51 continues to move downward, the lifting plate 51 gradually moves to the bottom of the reciprocating thread on the outside of the lifting plate 51. At this time, the movable block 58 pushes the fixed block 62 from the side of the fixed block 62, so that the fixed block 62 drives the rotating seat 61 to rotate. When the rotating seat 61 rotates, the two arc-shaped molecular sieve filling frames 64 are driven to rotate synchronously through the rotating seat 61. S5, after the lifting plate 51 moves to the bottom of the reciprocating thread outside the lifting plate 51 and moves up to reset, the two arc-shaped molecular sieve filling frames 64 complete the exchange, and at the same time, the movable block 58 is no longer in contact with the fixed block 62. Subsequently, as the reciprocating screw 45 continues to rotate, the lifting plate 51 moves up to reset; S6. After the two arc-shaped molecular sieve filling frames 64 are replaced, the unused arc-shaped molecular sieve filling frame 64 is rotated to a position adjacent to the gas receiving chamber 74 to continue dehydrating the wet natural gas. The used arc-shaped molecular sieve filling frame 64 is rotated to between the two sets of heating units and then heated and reduced by the multiple heating resistors 82 located inside and outside the arc-shaped molecular sieve filling frame 64. The waste gas generated in this process is discharged through the waste pipe 34. S7, after the lifting plate 51 moves to the top of the reciprocating thread on the outside of the lifting plate 51, the lifting plate 51 moves down again as the reciprocating screw 45 continues to rotate.

[0036] It should also be noted that if Figure 8 As shown, the multi-stage compressor includes two air inlet ends and multiple air outlet ends. A trunk separation buffer is provided between the air inlet ends and the air outlet ends. The trunk separation buffer divides the wellhead gas source into multiple paths. Each path is provided with a combination of one or more groups of cylinders and separation buffers. The exhaust pipes of each path are connected to different air outlet ends or two groups are combined into one air outlet end. Solenoid valves are provided on the pipelines to control the gas flow direction and pressure so that the compressor can output different pressures at the same time.

[0037] It should also be noted that the trunk separation buffer divides the wellhead gas source into two routes, one of which is provided with a No. 1 cylinder and a first-level separation buffer, which are connected in series through a pipeline, and the other route is provided with a No. 2 cylinder and a second-level separation buffer, which are connected in series through a pipeline, and the air outlets of the first-level separation buffer and the second-level separation buffer are connected by a pipeline, and an electric valve actuator is provided on the connected pipeline, the pipelines of the air outlets of the first-level separation buffer and the second-level separation buffer are both connected to the first air outlet end, and a valve is provided on the pipeline between the first-level separation buffer and the first air outlet end; The pipe connected to the air outlet of the secondary separation buffer is connected to the No. 3 cylinder and the three-stage separation buffer. The No. 3 cylinder and the three-stage separation buffer are connected in series. A valve is connected to the pipe of the air inlet of the No. 3 cylinder. The air outlet of the three-stage separation buffer is connected to the second air outlet through a pipe. The first-stage separation buffer is provided with two air outlets, one of which is connected to the first air outlet end through a pipe, and the other is connected to the air inlet of the second cylinder through a pipe. Solenoid valves are provided on both sets of pipes. The air inlet of the No. 3 cylinder is connected to the air outlet of the main separation buffer through a pipeline, and a solenoid valve is installed on the pipeline; The pipes connected to the gas outlets of the first-stage separation buffer, the second-stage separation buffer and the third-stage separation buffer are all connected with valves to connect to the vent main pipe; A filter is provided on the pipe connecting the air inlet end to the main separation buffer; An air cooler is provided on the pipes between the cylinder and the separation buffer; The non-gas outlets of the main separation buffer and the branch separation buffer are both collected at the sewage main pipe through pipes with solenoid valves, and the non-gas outlets of the filter are also connected to the sewage main pipe through pipes with solenoid valves.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reciprocating mixed-flow compressor unit for boosting and gas lift in oil and gas fields, comprising a compressor assembly comprising a multi-stage compressor for boosting and gas lift and a natural gas engine drivingly connected to the multi-stage compressor, characterized in that: The fuel input end of the natural gas engine is connected to a fuel storage assembly, and the input end of the fuel storage assembly is connected to a housing assembly; An air intake drive unit is provided on the top of the shell assembly, and a shifting mechanism is provided on the outer side of the air intake drive unit. A wet natural gas drying unit for drying wet natural gas is rotatably provided inside the shell assembly. The inside and outside of the wet natural gas drying unit are jointly provided with inner and outer sealing assemblies that divide the inner cavity of the shell assembly into left and right chambers. A heating reduction assembly for heating and reducing adjacent molecular sieves is jointly provided inside the shell assembly and inside the inner and outer sealing assemblies.

2. The boosted gas lift reciprocating mixed transmission compressor unit for oil and gas fields according to claim 1, characterized in that: The shell assembly includes a base, a shell is fixedly provided on the top of the base, an output pipe connected to the fuel storage assembly is fixedly provided through the bottom right side of the shell, and the output pipe is communicated with the right chamber inside the base, and a waste pipe is fixedly provided through the top left side of the shell, and the waste pipe is communicated with the left chamber inside the base.

3. The boosted gas lift reciprocating mixed transmission compressor unit for oil and gas fields according to claim 2, characterized in that: The air intake drive unit includes an air intake pipe A, the bottom end of the air intake pipe A is fixedly connected to a sealing cover fixedly arranged on the top of the base, the bottom of the sealing cover is fixedly connected to the air intake pipe B, the air intake pipe B passes through the top of the base and extends to the inside of the fixed channel and is fixedly connected to the inner wall of the fixed channel, an impeller is provided on the inside of the sealing cover, a reciprocating screw is fixedly provided at the bottom of the impeller, the reciprocating screw passes through the inner wall of the air intake pipe B and extends downward and is rotatably connected to the air intake pipe B and the rotating seat through a bearing, and a driving slide groove is provided on the side of the reciprocating screw.

4. The boosted gas lift reciprocating mixed flow compressor unit for oil and gas fields according to claim 3, characterized in that: The shifting mechanism includes a lifting plate that is sleeved on the outside of the reciprocating screw, and a guide slider that is fixedly provided on the side of the lifting plate and slides in the guide slot along the vertical direction. A plurality of sliding shafts are slidingly provided at the bottom of the guide slider, and an annular plate is fixedly provided at the bottom ends of the plurality of sliding shafts. A return spring is sleeved on the outside of the plurality of sliding shafts, and the return spring is fixedly connected between the lifting plate and the annular plate. A rotating plate is rotatably sleeved on the bottom of the annular plate through a bearing, and a driving slider that is fixedly provided on the inside of the rotating plate and slides in the driving slot along the vertical direction is fixedly provided. A movable shift block is fixedly provided on the bottom of the rotating plate.

5. The boosted gas lift reciprocating mixed transmission compressor unit for oil and gas fields according to claim 4, characterized in that: The wet natural gas drying unit includes a rotating seat that is rotatably nested on the top of the base through a bearing, a fixed block is fixedly provided on the top of the rotating seat, a mounting cylinder is fixedly provided on the outer side of the top of the rotating seat, and arc-shaped molecular sieve filling mesh frames are fixedly nested on both sides of the mounting cylinder.

6. The boosted gas lift reciprocating mixed transmission compressor unit for oil and gas fields according to claim 5, characterized in that: The inner and outer sealing components include an inner sealing column that is rotatably arranged on the inner side of the mounting tube and fixedly connected to the inner wall of the base. A guide groove is provided on the inner side of the inner sealing column. An installation cavity and a gas containing cavity are respectively provided on the left and right sides of the inner sealing column. A fixed channel is provided through the inner top of the gas containing cavity.

7. The boosted gas lift reciprocating mixed transmission compressor unit for oil and gas fields according to claim 6, characterized in that: The inner and outer sealing components also include two outer sealing blocks, which are respectively slidably fitted on the front and rear sides of the mounting tube and are fixedly connected to the inner wall of the base. Seals are provided between the inner sealing column and the inner wall of the mounting tube and between the outer sealing blocks and the outer wall of the mounting tube.

8. The boosted gas lift reciprocating mixed flow compressor unit for oil and gas fields according to claim 7, characterized in that: The heating reduction component includes two groups of heating units located on the inner and outer sides of adjacent arc-shaped molecular sieve filling frames respectively. Any group of the heating units includes a fixed seat and multiple heating resistors fixed on the side of the fixed seat. One of the fixed seats is fixed on the inner side of the installation cavity, and the other fixed seat is fixed on the left side of the base.

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