A pressurized gas lift piston reciprocating integrated machine with automatic adjustment of clearance

Abstract

The application relates to a pressurized gas lift piston reciprocating integrated machine with automatic adjustment of a configuration gap, which comprises a pressurizing assembly, a gas lift first-stage assembly, a gas lift second-stage assembly and a driving assembly; the pressurizing assembly is provided with an air inlet end, a first pressurizing output end and a second pressurizing output end; the air inlet end of the gas lift first-stage assembly is communicated with the second pressurizing output end, and the gas lift first-stage assembly is provided with a first gas lift first-stage output end and a second gas lift first-stage output end; the air inlet end of the gas lift second-stage assembly is communicated with the second gas lift first-stage output end; in a conventional pressurizing mode, air is conveyed to an external conveying pipeline after being pressurized by the pressurizing assembly; in a low-pressure gas lift mode, the pressurized gas can be conveyed to a low-pressure gas well in addition to the external conveying pipeline; in a high-pressure gas lift mode, the pressurized gas can be conveyed to a high-pressure gas well in addition to the external conveying pipeline; the pressurized gas lift piston reciprocating integrated machine has multiple operation modes and can flexibly cope with different exploitation requirements of gas wells.

Description

Technical Field

[0001] This invention relates to the field of natural gas extraction equipment technology, and in particular to an integrated pressurized gas lift piston reciprocating machine with automatic clearance adjustment. Background Technology

[0002] In the development of natural gas fields, the pre-pressurization and gas lift stage at the gas gathering station plays a crucial role in improving the recovery rate of natural gas.

[0003] Traditional booster air lift equipment has limitations in terms of air volume regulation and equipment operation modes, as follows:

[0004] 1. In terms of gas volume regulation, traditional equipment struggles to achieve wide-range and precise adjustments. Some equipment has a narrow gas volume regulation range, only able to adjust the gas volume within a limited interval, failing to meet the diverse gas volume requirements of different gas wells at different stages of production. In the early stages of production, gas wells produce a large amount of gas, requiring equipment capable of efficient pressurization and transportation. However, traditional equipment, due to insufficient gas volume regulation capabilities, may experience low gas transportation efficiency or even gas blockage. In the later stages of production, gas well production gradually decreases, requiring equipment capable of precise gas volume control to avoid energy waste, but traditional equipment often falls short of these requirements.

[0005] 2. Regarding equipment operation modes, traditional booster gas lift equipment has relatively limited functionality, typically only capable of simple boosting or gas lift functions, and cannot flexibly switch between multiple operation modes according to actual working conditions. When facing gas wells with different pressure and gas volume requirements, traditional equipment cannot quickly adjust its working state, resulting in poor applicability in some complex gas field environments, making it difficult to fully utilize its performance advantages. Summary of the Invention

[0006] In view of this, it is necessary to provide a booster air lift piston reciprocating integrated machine with automatic clearance adjustment to solve the limitations of traditional booster air lift equipment in terms of air volume regulation and equipment operation mode.

[0007] This invention provides an integrated pressurized gas lift piston reciprocating unit with automatic clearance adjustment, comprising a pressurization component, a primary gas lift component, a secondary gas lift component, and a drive component. The pressurization component has an inlet end, a first pressurization output end, and a second pressurization output end, the first pressurization output end being used to connect to an external transmission pipeline. The inlet end of the primary gas lift component is connected to the second pressurization output end, and the primary gas lift component has a first primary gas lift output end and a second primary gas lift output end, the first primary gas lift output end being used to connect to a low-pressure gas well. The inlet end of the secondary gas lift component is connected to the second primary gas lift output end, and the secondary gas lift component has a secondary gas lift output end for connecting to a high-pressure gas well. The drive component is connected to the pressurization component, the primary gas lift component, and the secondary gas lift component.

[0008] Furthermore, the pressurization assembly includes a pressurization cylinder, the first-stage air lift assembly includes a first-stage air lift cylinder, and the second-stage air lift assembly includes a second-stage air lift cylinder.

[0009] Furthermore, there are multiple booster cylinders, air-lift primary cylinders, and air-lift secondary cylinders, which are sequentially connected.

[0010] Furthermore, there are two of each of the following: the booster cylinder, the first-stage air-lift cylinder, and the second-stage air-lift cylinder. Both booster cylinders are double-acting cylinders and are connected in parallel. Both first-stage air-lift cylinders are double-acting cylinders and are connected in parallel. Both second-stage air-lift cylinders are single-acting cylinders and are connected in parallel.

[0011] Furthermore, the double-acting cylinder includes a first cylinder body and a first piston. The first piston is built into the first cylinder body and divides the interior of the first cylinder body into a first air chamber and a second air chamber. A first intake valve and a first exhaust valve connected to the first air chamber are installed on the first cylinder body, and a second intake valve and a second exhaust valve connected to the second air chamber are installed on the first cylinder body.

[0012] Furthermore, the single-acting cylinder includes a second cylinder body and a second piston. The second piston is built into the second cylinder body and divides the interior of the second cylinder body into a single-acting air chamber. A third intake valve and a third exhaust valve connected to the single-acting air chamber are installed on the second cylinder body.

[0013] Furthermore, the output end of the drive component is connected to the plurality of first pistons and the plurality of second pistons for driving the first pistons and / or the second pistons to move.

[0014] Furthermore, the booster assembly also includes a clearance adjuster, the output end of which is connected to the first cylinder of the booster cylinder to drive the first cylinder to move.

[0015] Furthermore, it also includes a gas-liquid separator installed at the air inlet end of the booster assembly.

[0016] Furthermore, it also includes a first buffer and a second buffer respectively installed at the air inlet end of the first-stage air-lift assembly and the air inlet end of the second-stage air-lift assembly.

[0017] Compared with existing technologies, in the conventional pressurization mode, the first pressurization output end is open and the second pressurization output end is closed. At this time, the incoming gas is pressurized by the pressurization component and then delivered to the external pipeline. In the low-pressure gas lift mode, the first pressurization output end, the second pressurization output end, the first gas lift primary output end and the second gas lift primary output end are all open, and the gas lift secondary output end is closed. After pressurization, the gas can be delivered to the external pipeline and also to the low-pressure gas well. In the high-pressure gas lift mode, the first pressurization output end, the second pressurization output end, the first gas lift primary output end and the gas lift secondary output end are all open, and the second gas lift primary output end is closed. After pressurization, the gas can be delivered to the external pipeline and also to the high-pressure gas well. This pressurization gas lift piston reciprocating integrated machine has multiple operating modes and can flexibly meet the different extraction needs of gas wells. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the integrated pressurized airlift piston reciprocating machine with automatic clearance adjustment provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the supercharger assembly;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the gas lift primary unit and the gas lift secondary unit;

[0021] Figure 4 for Figure 1 Schematic diagram of a double-acting cylinder;

[0022] Figure 5 for Figure 1 Schematic diagram of a single-acting cylinder;

[0023] Figure 6 This is a schematic diagram of the overall structure when the system is in conventional supercharging mode;

[0024] Figure 7 This is a schematic diagram of the overall structure under the pressure-boosting, low-flow, low-pressure air lift method;

[0025] Figure 8 This is a schematic diagram of the overall structure under the pressure-boosting, low-flow-rate air lift method.

[0026] Figure 9 This is a schematic diagram of the overall structure under the pressurized, high-flow, low-pressure air lift method;

[0027] Figure 10 This is a schematic diagram of the overall structure under the pressure-boosting, high-flow-rate, high-pressure air lift method;

[0028] Figure 11 This is a schematic diagram of the overall structure under the pressure boosting, low-flow, high-pressure air lift method. Detailed Implementation

[0029] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0030] like Figure 1 As shown, the present invention provides a pressurized gas lift piston reciprocating integrated machine with automatic clearance adjustment, comprising a pressurization component 100, a first-stage gas lift component 200, a second-stage gas lift component 300, and a drive component 400. The pressurization component 100 has an inlet end, a first pressurization output end 10a, and a second pressurization output end 10b, the first pressurization output end 10a being used to connect to an external transmission pipeline. The inlet end of the first-stage gas lift component 200 is connected to the second pressurization output end 10b, and the first-stage gas lift component 200 has a first-stage gas lift output end 20a and a second-stage gas lift output end 20b, the first-stage gas lift output end 20a being used to connect to a low-pressure gas well. The inlet end of the second-stage gas lift component 300 is connected to the second-stage gas lift output end 20b, and the second-stage gas lift component 300 has a second-stage gas lift output end 30a being used to connect to a high-pressure gas well. The drive component 400 is connected to the pressurization component 100, the first-stage gas lift component 200, and the second-stage gas lift component 300.

[0031] During implementation, in the conventional pressurization mode, the first pressurization output end 10a is open and the second pressurization output end 10b is closed. At this time, the incoming gas is pressurized by the pressurization component 100 and then delivered to the external transmission pipeline. In the low-pressure gas lift mode, the first pressurization output end 10a, the second pressurization output end 10b, the first gas lift primary output end 20a and the second gas lift primary output end 20b are all open, and the gas lift secondary output end 30a is closed. After pressurization, the gas can be delivered to the external transmission pipeline and also to the low-pressure gas well. In the high-pressure gas lift mode, the first pressurization output end 10a, the second pressurization output end 10b, the first gas lift primary output end 20a and the gas lift secondary output end 30a are all open, and the second gas lift primary output end 20b is closed. After pressurization, the gas can be delivered to the external transmission pipeline and also to the high-pressure gas well. This pressurization gas lift piston reciprocating integrated machine has multiple operating modes and can flexibly meet the different extraction needs of gas wells.

[0032] like Figure 2As shown, in this embodiment, the booster assembly 100 includes a booster cylinder 110, the first-stage air lift assembly 200 includes a first-stage air lift cylinder 210, and the second-stage air lift assembly 300 includes a second-stage air lift cylinder 310.

[0033] like Figure 3 As shown, in this embodiment, there are multiple booster cylinders 110, air-lift primary cylinders 210, and air-lift secondary cylinders 310, which are sequentially connected.

[0034] like Figure 3 As shown, in one embodiment, there are two booster cylinders 110, two air-lift first-stage cylinders 210, and two air-lift second-stage cylinders 310. Both booster cylinders 110 are double-acting cylinders 500 and are connected in parallel. Both air-lift first-stage cylinders 210 are double-acting cylinders 500 and are connected in parallel. Both air-lift second-stage cylinders 310 are single-acting cylinders 600 and are connected in parallel.

[0035] The number of booster cylinder 110, air-lift primary cylinder 210, and air-lift secondary cylinder 310 can be three, four, or more, with no limit on the number. Understandably, the more of these structures are included, the more configurations can be formed; however, the equipment maintenance costs will also increase accordingly.

[0036] like Figure 4 As shown, the double-acting cylinder 500 in this embodiment includes a first cylinder body 510 and a first piston 520. The first piston 520 is built into the first cylinder body 510 and divides the interior of the first cylinder body 510 into a first air chamber 511 and a second air chamber 512. A first intake valve 511a and a first exhaust valve 511b connected to the first air chamber 511 are installed on the first cylinder body 510. A second intake valve 512a and a second exhaust valve 512b connected to the second air chamber 512 are installed on the first cylinder body 510.

[0037] like Figure 5 As shown, the single-acting cylinder 600 in this embodiment includes a second cylinder body 610 and a second piston 620. The second piston 620 is built into the second cylinder body 610 and divides the interior of the second cylinder body 610 into a single-acting air chamber 611. A third intake valve 611a and a third exhaust valve 611b that communicate with the single-acting air chamber 611 are installed on the second cylinder body 610.

[0038] The specific working principle is as follows: The intake valve (i.e., the collective term for the first intake valve 511a, the second intake valve 512a, and the third intake valve 611a mentioned above) is a one-way valve and is in a normally open state. As gas is continuously injected, the pressure in the air chamber (i.e., the collective term for the first air chamber 511, the second air chamber 512, and the single-acting air chamber 611) continuously increases until the pressure increases to a predetermined value. At this point, the exhaust valve (i.e., the collective term for the first exhaust valve 511b, the second exhaust valve 512b, and the third exhaust valve 611b) opens to achieve the function of gas pressurization. It can be understood that the valve body of the intake valve can be opened by the opening device. At this time, the air chamber is always in a state of being connected to the incoming gas. The air chamber cannot be closed, and the pressure inside cannot increase. At the same time, the exhaust valve cannot open, that is, the pressurization function cannot be achieved in this air chamber.

[0039] In this embodiment, the output terminal of the drive component 400 is connected to a plurality of first pistons 520 and a plurality of second pistons 620 for driving the first pistons 520 and / or the second pistons 620 to move.

[0040] To achieve precise adjustment, in this embodiment, the booster assembly 100 further includes a clearance adjuster 120. The output end of the clearance adjuster 120 is connected to the first cylinder 510 of the booster cylinder 110 to drive the first cylinder 510 to move. It can be understood that the aforementioned drive assembly 400 drives the piston (i.e., the first piston 520 and the second piston 620 collectively) to achieve the normal working cycle of "intake, compression, exhaust, and expansion" of the cylinder. The reciprocating movement of the clearance adjuster 120 piston can change the size of the cylinder clearance volume, thereby achieving precise stepless adjustment and control of the air volume.

[0041] This embodiment also includes a gas-liquid separator 130 installed at the air inlet of the booster assembly 100.

[0042] This embodiment also includes a first buffer 220 and a second buffer 320 respectively installed at the air inlet of the first-stage air-lift assembly 200 and the air inlet of the second-stage air-lift assembly 300.

[0043] It is understandable that the first air lift first stage output terminal 20a of the air lift first stage assembly 200 is equipped with a first shut-off valve, and the second air lift second stage output terminal 30a of the air lift second stage assembly 300 is equipped with a second shut-off valve.

[0044] In this embodiment, the two booster cylinders 110, the two air-lift first-stage cylinders 210, and the two air-lift second-stage cylinders 310 can be combined into six modes, which will be described below.

[0045] (1) Conventional boosting method:

[0046] like Figure 6As shown, the first air chambers 511 of both booster cylinders 110 are in normal working condition, and the second air inlet valves 512a of both booster cylinders 110 are opened and unloaded by the opening device. At the same time, the first air inlet valves 511a and second air inlet valves 512a of both air-lift first-stage cylinders 210 are also opened and unloaded by the opening device. At this time, the equipment will automatically adjust the air volume according to the amount of incoming air and the intake pressure through the clearance adjustment component 120.

[0047] If the incoming air volume is large, the second intake valve 512a of one of the booster cylinders 110 can be opened by the opening device to unload the load, thereby achieving efficient gas boosting.

[0048] (2) Pressurized, low-flow, low-pressure air lift method:

[0049] like Figure 7 As shown, the first air chamber 511 and the second air chamber 512 of the two booster cylinders 110 are both in normal working condition. The first air intake valve 511a and the second air intake valve 512a of one air-lift first-stage cylinder 210 are both opened and unloaded by the opening device. The first air chamber 511 and the second air chamber 512 of the other air-lift first-stage cylinder 210 are both in normal working condition. The third air intake valve 611a of the other two air-lift second-stage cylinders 310 are opened and unloaded by the opening device. The first shut-off valve is open and the second shut-off valve is closed. At the same time, the air volume is automatically adjusted by the clearance adjustment component 120 according to the incoming air volume and the intake pressure to achieve low-flow, low-pressure air lift.

[0050] (3) High-pressure medium-flow low-pressure air lift method:

[0051] like Figure 8 As shown, the first air chamber 511 and the second air chamber 512 of the two booster cylinders 110 are both in normal working condition. The first intake valve 511a of one air-lift first-stage cylinder 210 is open, and the second intake valve 512a is opened and unloaded by the opening device. The first air chamber 511 and the second air chamber 512 of the other air-lift first-stage cylinder 210 are both in normal working condition. The third intake valve 611a of the other two air-lift second-stage cylinders 310 is opened and unloaded by the opening device. The first shut-off valve is open, and the second shut-off valve is closed. At the same time, the air volume is automatically adjusted by the clearance adjustment component 120 according to the incoming air volume and intake pressure to achieve low-flow, low-pressure air lift and complete medium-flow, low-pressure air lift.

[0052] (4) High-pressure, high-flow, low-pressure air lift method:

[0053] like Figure 9As shown, the first air chamber 511 and the second air chamber 512 of the two booster cylinders 110 are in normal working condition, the first air chamber 511 and the second air chamber 512 of the two air-lift first-stage cylinders 210 are in normal working condition, and the third air intake valve 611a of the other two air-lift second-stage cylinders 310 is opened and unloaded by the opening device; and the first shut-off valve is open and the second shut-off valve is closed. At the same time, according to the incoming air volume and the intake pressure, the air volume is automatically adjusted by the clearance adjustment component 120 to achieve small flow low-pressure air lift to meet the needs of large flow low-pressure air lift.

[0054] (5) High-pressure, high-flow-rate air lift method:

[0055] like Figure 10 As shown, the first air chamber 511 and the second air chamber 512 of the two booster cylinders 110 are in normal working condition, the first air chamber 511 and the second air chamber 512 of the two air-lift first-stage cylinders 210 are in normal working condition, and the single-acting air chamber 611 of the other two air-lift second-stage cylinders 310 are in normal working condition; and the first shut-off valve is closed, the second shut-off valve is open, and the air volume is automatically adjusted according to the incoming air volume and the inlet air pressure through the clearance adjustment component 120 to achieve high-flow-rate high-pressure air lift.

[0056] (6) High-pressure air lift method with low flow rate and pressurization:

[0057] like Figure 11 As shown, the first air chamber 511 and the second air chamber 512 of the two booster cylinders 110 are both in normal working condition. The first air chamber 511 and the second air chamber 512 of one air-lift first-stage cylinder 210 are both in normal working condition, while the first intake valve 511a and the second intake valve 512a of the other air-lift first-stage cylinder 210 are both opened and unloaded by the opening device. The single-acting air chamber 611 of one air-lift second-stage cylinder 310 are both in normal working condition, while the third intake valve 611a of the other air-lift second-stage cylinder 310 is opened and unloaded by the opening device. The first shut-off valve is closed and the second shut-off valve is open. At the same time, the air volume is automatically adjusted according to the incoming air volume and the intake pressure through the clearance adjustment component 120 to meet the requirements of small flow high pressure air lift.

[0058] In addition, there are some alternative solutions to achieve the same innovative goals. For air volume regulation, different types of flow regulating valves can be used to replace some of the top-opening devices; air volume regulation can employ a combined regulation method of clearance regulation and frequency conversion speed control. For switching control of operating modes, electric control can replace hydraulic control.

[0059] Workflow: In conventional pressurization mode, the first pressurization output terminal 10a is open and the second pressurization output terminal 10b is closed. At this time, the incoming gas is pressurized by the pressurization component 100 and then delivered to the external pipeline. In low-pressure gas lift mode, the first pressurization output terminal 10a, the second pressurization output terminal 10b, the first gas lift primary output terminal 20a and the second gas lift primary output terminal 20b are all open, and the gas lift secondary output terminal 30a is closed. After pressurization, the gas can be delivered to the external pipeline and also to the low-pressure gas well. In high-pressure gas lift mode, the first pressurization output terminal 10a, the second pressurization output terminal 10b, the first gas lift primary output terminal 20a and the gas lift secondary output terminal 30a are all open, and the second gas lift primary output terminal 20b is closed. After pressurization, the gas can be delivered to the external pipeline and also to the high-pressure gas well. This pressurization gas lift piston reciprocating integrated machine has multiple operating modes and can flexibly meet the different extraction needs of gas wells.

[0060] Compared with existing technologies:

[0061] (1) In terms of gas volume regulation, the integrated machine provided in this embodiment of the invention can achieve a wide gas volume regulation range of 30-100%, which can more accurately meet the gas volume requirements of different gas wells throughout the entire extraction cycle compared with traditional equipment. Whether it is the large flow gas treatment in the early stage of high-yield gas wells or the small flow fine regulation in the later stage of low-yield gas wells, this equipment can handle it with ease, greatly improving the extraction efficiency of natural gas and reducing energy waste;

[0062] (2) Regarding the operating modes, the six operating combination modes designed in this invention enable the equipment to quickly switch working states according to the actual working conditions such as pressure and production of different gas wells. When facing gas wells that require high-pressure gas lift, the high-pressure gas lift mode with increased pressure and flow rate or the high-pressure gas lift mode with increased pressure and flow rate can be selected; for gas wells with lower pressure requirements, the corresponding low-pressure gas lift mode can be adopted, which significantly improves the applicability of the equipment to different gas wells and enhances the overall exploitation efficiency of the gas field.

[0063] (3) In terms of equipment structure and performance, the optimized structural design enhances the collaborative working ability between various components. The reasonable connection between the booster cylinder 110 and the gas lift section, as well as the application of the hydraulic jacking device for the inlet valve, effectively reduces energy loss and equipment operation stability during gas transmission. At the same time, through the precise combined control of the clearance adjustment component 120 and the inlet valve, the precise adjustment of gas volume and pressure is achieved, improving the working stability and reliability of the equipment and reducing operating costs. In addition, the equipment can perform gas lift for a single gas well or for multiple gas wells simultaneously, further improving the working efficiency and practicality of the equipment.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A booster air-lift piston reciprocating integrated machine with automatic clearance adjustment, characterized in that, include: A booster assembly has an air inlet, a first booster output end, and a second booster output end, wherein the first booster output end is used to connect to an external transmission pipeline. The gas lift primary component has an air inlet end connected to the second booster output end. The gas lift primary component has a first gas lift primary output end and a second gas lift primary output end. The first gas lift primary output end is used to connect to a low-pressure gas well. The gas lift secondary component has its inlet end connected to the output end of the second gas lift primary component, and the gas lift secondary component has a gas lift secondary output end for connecting to a high-pressure gas well; A drive assembly connected to the pressurization assembly, the first-stage airlift assembly, and the second-stage airlift assembly; The pressurization assembly includes a pressurization cylinder, and the first-stage air lift assembly includes a first-stage air lift cylinder; the second-stage air lift assembly includes a second-stage air lift cylinder. The number of the booster cylinder, the first-stage air-lift cylinder, and the second-stage air-lift cylinder are all multiple, and the booster cylinder, the first-stage air-lift cylinder, and the second-stage air-lift cylinder are connected in sequence. The number of the booster cylinder, the first-stage air-lift cylinder, and the second-stage air-lift cylinder are all two. Both booster cylinders are double-acting cylinders and are connected in parallel. Both first-stage air-lift cylinders are double-acting cylinders and are connected in parallel. Both second-stage air-lift cylinders are single-acting cylinders and are connected in parallel. The double-acting cylinder includes a first cylinder body and a first piston, and the single-acting cylinder includes a second cylinder body and a second piston. The output end of the drive component is connected to the plurality of first pistons and the plurality of second pistons, and is used to drive the first pistons and / or the second pistons to move. The booster assembly also includes a clearance adjuster, the output end of which is connected to the first cylinder of the booster cylinder to drive the first cylinder to move.

2. The integrated pressurized air-lift piston reciprocating unit with automatic clearance adjustment as described in claim 1, characterized in that, The first piston is built into the first cylinder body and divides the interior of the first cylinder body into a first air chamber and a second air chamber. The first cylinder body is equipped with a first intake valve and a first exhaust valve that communicate with the first air chamber, and a second intake valve and a second exhaust valve that communicate with the second air chamber.

3. The integrated pressurized air-lift piston reciprocating unit with automatic clearance adjustment as described in claim 2, characterized in that, The second piston is built into the second cylinder and divides the interior of the second cylinder into a single-acting chamber. The second cylinder is equipped with a third intake valve and a third exhaust valve that communicate with the single-acting chamber.

4. The integrated pressurized air-lift piston reciprocating unit with automatic clearance adjustment as described in claim 1, characterized in that, It also includes a gas-liquid separator installed at the air inlet of the booster assembly.

5. The integrated pressurized air-lift piston reciprocating unit with automatic clearance adjustment as described in claim 1, characterized in that, It also includes a first buffer and a second buffer, which are respectively installed at the air inlet of the first-stage air-lift assembly and the air inlet of the second-stage air-lift assembly.

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