Negative pressure gas production mixed transportation supercharging device

Abstract

The utility model discloses a negative pressure gas production mixed transportation supercharging device, belongs to the technical field of gas production devices, and solves the problem that a compressor of an existing oil and gas well is high in use cost. The system comprises a hydraulic oil tank, the hydraulic oil tank is at least communicated with one oil pump, each oil pump is communicated with one compressor assembly, and each compressor assembly at least comprises one double-cylinder double-piston booster pump. Compared with an existing compressor, oil-gas-water mixed transportation can be achieved, a front gas-liquid separator is not needed, the manufacturing cost is lower, the maintenance cost is lower, and the use cost is reduced. The double-end hydraulic rod drives the piston to reciprocate in the air cylinder through the two-position four-way electromagnetic directional valve and the controller, and a low-pressure oil-gas-water mixture in the air inlet pipe is compressed and pressurized to form a high-pressure oil-gas-water mixture.

Description

Technical Field

[0001] The utility model relates to the technical field of gas collection devices, in particular to a negative pressure gas collection, mixed transmission and pressurization device. Background Art

[0002] With the development of oil and gas wells, hydrocarbon condensate and formation water are often produced at the bottom of the gas well. When the natural gas output is large and the fluid is relatively small, the bottom hole liquid will be discharged from the wellbore along with the natural gas. When the formation pressure drops, the formation fluid cannot be discharged, and there will be liquid accumulation at the bottom of the wellbore. The presence of liquid accumulation will increase the back pressure on the gas layer and limit the production capacity of the well, and sometimes even completely crush the well and shut it down. In the prior art, measures such as gas lift and bubble drainage are often used to discharge the bottom hole liquid to improve the production efficiency of the well and achieve the effect of water drainage and gas production. In many gas wells, in the later stages of exploitation, the formation energy is too low and the output pressure is insufficient, so that the requirements of the input pipeline network cannot be met.

[0003] For wells that have a significant pressure drop and can still produce gas but cannot independently transport gas into the pipeline network, the traditional solution is to add a fixed large compressor to compress natural gas 24 hours a day. However, the compressor is not only expensive, but also has high energy consumption and high operating costs. At the same time, when pressurizing the wellhead or gas pipeline, the gas entering the compressor needs to be separated from the gas and liquid, which not only requires a pre-gas-liquid separator, but also needs to deal with the discharged liquid in time, and the manual maintenance cost is high. In summary, the cost of using compressors in oil and gas wells is high. Utility Model Content

[0004] In view of the above problems in the prior art, the utility model provides a negative pressure gas production mixed transmission boosting device, which solves the problem of high cost of using compressors in existing oil and gas wells.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A negative pressure gas extraction and mixed transmission boosting device is provided, comprising a hydraulic oil tank, the hydraulic oil tank is connected to at least one oil pump, each oil pump is connected to a compressor assembly, each compressor assembly includes at least one double-barrel double-piston boosting pump; each double-barrel double-piston boosting pump includes a cylinder body, air cylinders are arranged at both ends of the cylinder body, a double-headed hydraulic rod is arranged in the cylinder body, the two ends of the double-headed hydraulic rod respectively pass through the two ends of the cylinder body and are respectively fixedly connected to two pistons located in the air cylinder; each cylinder body is provided with a first oil port and a second oil port connected to a two-position four-way electromagnetic reversing valve, each two-position four-way electromagnetic reversing valve is connected to the oil pump and the hydraulic oil tank and is electrically connected to a controller, and the controller is electrically connected to each oil pump; each air cylinder is provided with two groups of air ports, each group of air ports includes an air inlet and an air outlet, each air inlet and each air outlet are respectively connected to the air inlet pipe and the exhaust pipe of the air pipeline through a one-way valve.

[0007] The working principle of this scheme is to use the controller to start the oil pump, which transports the hydraulic oil in the hydraulic oil tank to the double-barrel double-piston booster pump of the compressor assembly, and uses a two-position four-way electromagnetic reversing valve to make the hydraulic oil reciprocate to push the double-headed hydraulic rod, which drives the piston to move back and forth in the cylinder, thereby compressing and pressurizing the low-pressure oil-gas-water mixture in the intake pipe to form a high-pressure oil-gas-water mixture, and the high-pressure oil-gas-water mixture is collected from the exhaust pipe input air pipeline. Compared with the compressor, the double-barrel double-piston booster pump of this scheme is not only cheaper, but also can compress the oil-gas-water mixture, does not require a pre-gas-liquid separator, and has a lower cost of use.

[0008] Furthermore, the hydraulic oil tank is connected to the oil delivery pipe and the hydraulic oil radiator respectively, the oil delivery pipe is connected to each oil pump, the hydraulic oil radiator is connected to the oil return pipe, and the oil return pipe is connected to each two-position four-way electromagnetic reversing valve. During the operation of the hydraulic system, due to the mechanical friction of the double-barrel double-piston booster pump and the internal friction of the fluid itself, heat will be generated, causing the hydraulic oil temperature to rise. The hydraulic oil radiator can help the hydraulic oil dissipate heat, reduce the oil temperature, slow down the oxidation rate of the oil, and thus extend the service life of the hydraulic oil.

[0009] Furthermore, all the two-position four-way electromagnetic reversing valves on each compressor assembly are connected to an oil return branch pipe, and each oil return branch pipe is connected to the oil return main pipe.

[0010] Furthermore, a flow sensor electrically connected to the controller is provided on the oil delivery main pipe, and the flow sensor can detect the flow of the hydraulic oil.

[0011] Furthermore, the air pipeline includes an intake main pipe and an exhaust main pipe. All intake pipes on each compressor assembly are connected to an intake branch pipe, and each intake branch pipe is connected to the intake main pipe; all exhaust pipes on each compressor assembly are connected to an exhaust branch pipe, and each exhaust branch pipe is connected to the exhaust main pipe.

[0012] Furthermore, each intake branch pipe is provided with an intake gate valve, and each exhaust branch pipe is provided with an exhaust gate valve.

[0013] Furthermore, pressure sensors are provided in both the intake pipe and the exhaust pipe, and both pressure sensors are electrically connected to the controller. The pressure sensors can detect the pressure and feed the pressure back to the controller, so that when the controller detects that the pressure of the intake pipe is high and meets the delivery requirements, the oil pump can be stopped, the start time of the oil pump can be reduced, and energy consumption can be reduced.

[0014] Furthermore, the controller is arranged in a control box, and a display is arranged on the control box, and the display is electrically connected to the controller. The display can display the flow rate and pressure detected by the flow sensor and the pressure sensor, which is convenient for workers to view.

[0015] Furthermore, the two groups of air ports on each air cylinder are symmetrically arranged on both sides of the outer wall of the air cylinder along the center line of the air cylinder, and the center lines of the air inlet and the air outlet of each group of air ports coincide. The air inlet and air outlet of the air cylinder are arranged in this way to facilitate the rapid delivery of the oil, gas and water mixture from the air outlet after compression.

[0016] Furthermore, each compressor assembly also includes a steel frame for supporting and fixing the double-tube double-piston booster pump, and fixing seats are arranged on both sides of the bottom of the cylinder body, and the two fixing seats are bolted to the steel frame.

[0017] The utility model discloses a negative pressure gas collection and mixed transmission boosting device, which has the following beneficial effects:

[0018] 1. Compared with the existing compressor, the utility model can realize the mixed transmission of oil, gas and water, does not need a pre-gas-liquid separator, has lower cost, lower maintenance cost and reduced use cost. Through the two-position four-way electromagnetic reversing valve and the controller, the double-headed hydraulic rod drives the piston to move back and forth in the cylinder, thereby compressing and pressurizing the low-pressure oil, gas and water mixture in the intake pipe to form a high-pressure oil, gas and water mixture.

[0019] 2. The display of the utility model can show the flow rate and pressure detected by the flow sensor and the pressure sensor, which is convenient for workers to maintain and view, and the workers can set the operating pressure through the controller. When the controller detects that the pressure of the air intake main pipe is high enough to meet the transportation requirements, the oil pump can be stopped to achieve selective pressure operation and reduce energy consumption. At the same time, workers can also adjust the speed of the oil pump according to different flow rates and pressures to achieve the best construction effect.

[0020] 3. The double-tube double-piston booster pump of the utility model can perform bidirectional reciprocating compression, and has higher compression efficiency than the traditional single-axis hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a negative pressure gas collection, mixed transmission and pressurization device;

[0022] Figure 2 It is a top view of the negative pressure gas collection and mixed transmission boosting device;

[0023] Figure 3 It is a structural schematic diagram of a double-barrel double-piston booster pump;

[0024] Figure 4 It is a schematic diagram of the internal structure of a double-barrel double-piston booster pump;

[0025] Figure 5 It is a side view of the negative pressure gas collection and mixed transmission boosting device;

[0026] Among them: 1. Hydraulic oil tank; 2. Oil pump; 3. Compressor assembly; 4. Hydraulic oil radiator; 5. Control box; 6. Double-tube double-piston booster pump; 7. Steel frame; 8. Two-position four-way solenoid reversing valve; 81. Cylinder body; 811. Double-headed hydraulic rod; 812. First oil port; 813. Second oil port; 82. Air cylinder; 821. Piston; 822. Air inlet; 823. Air outlet; 9. Check valve; 10. Air intake main pipe; 101. Air intake branch pipe; 102. Air intake gate valve; 103. Air intake pipe; 11. Oil delivery main pipe; 111. Oil delivery branch pipe; 12. Oil return main pipe; 121. Oil return branch pipe; 13. Exhaust main pipe; 131. Exhaust branch pipe; 132. Exhaust gate valve; 133. Exhaust pipe. DETAILED DESCRIPTION

[0027] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0028] refer to Figure 1 and Figure 2 This embodiment provides a negative pressure gas collection and mixed transmission boosting device, including a hydraulic oil tank 1, three oil pumps 2 and three compressor assemblies 3.

[0029] The hydraulic oil tank 1 is used to provide hydraulic oil. The hydraulic oil tank 1 is connected to the oil delivery main pipe 11 and the hydraulic oil radiator 4 respectively. The hydraulic oil radiator 4 is connected to the oil return main pipe 12.

[0030] During the operation of the hydraulic system, heat is generated due to the mechanical friction of the double-barrel double-piston booster pump 6 and the internal friction of the fluid itself, causing the hydraulic oil temperature to rise. The hydraulic oil radiator 4 can help the hydraulic oil dissipate heat, reduce the oil temperature, and slow down the oxidation rate of the oil, thereby extending the service life of the hydraulic oil. The hydraulic oil radiator 4 is a prior art. Since it is a prior art, this embodiment will not repeat its specific working principle and connection relationship.

[0031] The hydraulic oil tank 1 is connected to the three oil pumps 2 through the oil delivery main pipe 11 , and the three oil pumps 2 are connected to the three compressor assemblies 3 through three oil delivery branch pipes 111 , respectively.

[0032] The compressor assembly 3 is used to compress and boost the low-pressure oil-gas-water mixture. Each compressor assembly 3 includes a steel frame 7, which is divided into two layers, and a double-tube double-piston booster pump 6 is fixed on each layer of the steel frame 7.

[0033] refer to Figure 3 and Figure 4 Each double-barrel double-piston booster pump 6 includes a cylinder body 81 , and fixing seats are arranged on both sides of the bottom of the cylinder body 81 , and the two fixing seats are bolted to the steel frame 7 .

[0034] Air cylinders 82 are provided on both ends of the cylinder body 81 , and a double-headed hydraulic rod 811 is provided in the cylinder body 81 . Both ends of the double-headed hydraulic rod 811 pass through both ends of the cylinder body 81 and are fixedly connected to two pistons 821 located in the air cylinder 82 .

[0035] Each cylinder body 81 is provided with a first oil port 812 and a second oil port 813 connected to the two-position four-way solenoid reversing valve 8. The remaining two outlets of the two-position four-way solenoid reversing valve 8 are connected to the oil pump 2 and the hydraulic oil tank 1 respectively. Each two-position four-way solenoid reversing valve 8 is electrically connected to the controller. The controller is arranged in the control box 5 and is electrically connected to each oil pump 2.

[0036] Each air cylinder 82 is provided with two groups of air ports, each group of air ports includes an air inlet 822 and an air outlet 823, and each air inlet 822 and each air outlet 823 are respectively connected to the air inlet pipe 103 and the air outlet pipe 133 of the air pipeline through a one-way valve 9.

[0037] As for the specific structure of the air cylinder 82, two groups of air ports on each air cylinder 82 are symmetrically arranged on both sides of the outer wall of the air cylinder 82 along the center line of the air cylinder 82, and the center lines of the air inlet 822 and the air outlet 823 of each group of air ports coincide with each other. The air inlet 822 and the air outlet 823 of the air cylinder 82 are arranged in this way to facilitate the rapid delivery of the oil-gas-water mixture from the air outlet 823 after compression.

[0038] refer to Figure 2 and Figure 5 As a specific structure for connecting the two-position four-way solenoid reversing valve 8 with the hydraulic oil tank 1, the oil return ports of the two two-position four-way solenoid reversing valves 8 on the three compressor assemblies 3 are all connected to an oil return branch pipe 121, and the three oil return branch pipes 121 are all connected to the oil return main pipe 12.

[0039] refer to Figure 2 As a specific structure of the air pipeline, the air pipeline includes an intake pipe 10 and an exhaust pipe 13. Pressure sensors are provided in the intake pipe 10 and the exhaust pipe 13, and both pressure sensors are electrically connected to the controller. The pressure sensor can detect the pressure and feed the pressure back to the controller, so that when the controller detects that the pressure of the intake pipe 10 is high and meets the delivery requirements, the oil pump 2 can be stopped, the start time of the oil pump 2 can be reduced, and energy consumption can be reduced.

[0040] Specifically, the air intake main pipe 10 is connected to the oil and gas wells, and three air intake branch pipes 101 are arranged on the air intake main pipe 10. The three air intake branch pipes 101 correspond to the three compressor assemblies 3 respectively. Each air intake branch pipe 101 is connected to all the air intake pipes 103 on the corresponding compressor assembly 3, and an air intake gate valve 102 is arranged on each air intake branch pipe 101.

[0041] The exhaust main pipe 13 is connected to the collector, and three exhaust branch pipes 131 are arranged on the exhaust main pipe 13. The three exhaust branch pipes 131 correspond to the three compressor assemblies 3 respectively. Each exhaust branch pipe 131 is connected to all exhaust gases on the corresponding compressor assembly 3, and each exhaust branch pipe 131 is provided with an exhaust gate valve 132.

[0042] As a further solution of this embodiment, a flow sensor electrically connected to the controller is provided on the oil delivery main pipe 11. The flow sensor can detect the flow of the hydraulic oil.

[0043] The controller is arranged in the control box 5, and a display is arranged on the control box 5, and the display is electrically connected to the controller. The display can display the flow rate and pressure detected by the flow sensor and the pressure sensor, which is convenient for workers to view. The controller in this embodiment is a PLC or a single chip microcomputer.

[0044] In summary, the working principle of this solution is:

[0045] The worker sets the working pressure through the controller. When the controller detects that the pressure of the air intake main pipe 10 is lower than the working pressure, the controller starts the oil pump 2. The oil pump 2 delivers the hydraulic oil in the hydraulic oil tank 1 to the double-cylinder double-piston booster pump 6 of the compressor assembly 3. The controller switches back and forth through the two-position four-way solenoid reversing valve 8 to make the hydraulic oil reciprocate and push the double-headed hydraulic rod 811. The double-headed hydraulic rod 811 drives the piston 821 to move back and forth in the air cylinder 82, thereby compressing and boosting the low-pressure oil-gas-water mixture in the air intake pipe 103 to form a high-pressure oil-gas-water mixture. The high-pressure oil-gas-water mixture is collected from the exhaust pipe 133 into the air pipeline.

[0046] When the controller detects that the pressure of the air intake main pipe 10 is less than or equal to the operating pressure, the controller stops the oil pump 2 to reduce energy consumption.

[0047] Although the specific implementation of the utility model is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A negative pressure gas collection and mixed transmission boosting device, characterized in that: It comprises a hydraulic oil tank (1), the hydraulic oil tank (1) being connected to at least one oil pump (2), each of the oil pumps (2) being connected to a compressor assembly (3), and each of the compressor assemblies (3) comprising at least one double-barrel double-piston booster pump (6); Each of the double-barrel double-piston booster pumps (6) comprises a cylinder body (81), air cylinders (82) are arranged at both ends of the cylinder body (81), a double-headed hydraulic rod (811) is arranged inside the cylinder body (81), and both ends of the double-headed hydraulic rod (811) respectively pass through both ends of the cylinder body (81) and are respectively fixedly connected to two pistons (821) located in the air cylinder (82); Each cylinder body (81) is provided with a first oil port (812) and a second oil port (813) which are connected to a two-position four-way electromagnetic reversing valve (8); each of the two-position four-way electromagnetic reversing valves (8) is connected to an oil pump (2) and a hydraulic oil tank (1) and is electrically connected to a controller; and the controller is electrically connected to each oil pump (2); Each air cylinder (82) is provided with two groups of air ports, each group of air ports comprises an air inlet (822) and an air outlet (823), and each of the air inlet (822) and each of the air outlet (823) are respectively connected to the air inlet pipe (103) and the air outlet pipe (133) of the air pipeline through a one-way valve (9).

2. The negative pressure gas collection and mixed transmission boosting device according to claim 1 is characterized in that: The hydraulic oil tank (1) is respectively connected to an oil delivery pipe (11) and a hydraulic oil radiator (4); the oil delivery pipe (11) is connected to each of the oil pumps (2); the hydraulic oil radiator (4) is connected to an oil return pipe (12); and the oil return pipe (12) is connected to each of the two-position four-way electromagnetic reversing valves (8).

3. The negative pressure gas collection and mixed transmission boosting device according to claim 2 is characterized in that: All of the two-position four-way electromagnetic reversing valves (8) on each compressor assembly (3) are connected to an oil return branch pipe (121), and each of the oil return branch pipes (121) is connected to the oil return main pipe (12).

4. The negative pressure gas collection and mixed transmission boosting device according to claim 2 is characterized in that: The oil delivery main pipe (11) is provided with a flow sensor electrically connected to the controller.

5. The negative pressure gas collection and mixed transmission boosting device according to claim 1 is characterized in that: The air pipeline comprises an air intake main pipe (10) and an air exhaust main pipe (13), all the air intake pipes (103) on each of the compressor assemblies (3) are connected to an air intake branch pipe (101), and each of the air intake branch pipes (101) is connected to the air intake main pipe (10); All exhaust pipes (133) on each compressor assembly (3) are connected to an exhaust branch pipe (131), and each exhaust branch pipe (131) is connected to the exhaust main pipe (13).

6. The negative pressure gas collection and mixed transmission boosting device according to claim 5 is characterized in that: Each of the air intake branch pipes (101) is provided with an air intake gate valve (102), and each of the air exhaust branch pipes (131) is provided with an air exhaust gate valve (132).

7. The negative pressure gas collection and mixed transmission boosting device according to claim 5 is characterized in that: Pressure sensors are provided in the air intake main pipe (10) and the exhaust main pipe (13), and both pressure sensors are electrically connected to the controller.

8. The negative pressure gas collection and mixed transmission boosting device according to claim 1 is characterized in that: The controller is arranged in a control box (5), and a display is arranged on the control box (5), and the display is electrically connected to the controller.

9. The negative pressure gas collection and mixed transmission boosting device according to claim 1, characterized in that: The two groups of air ports on each of the air cylinders (82) are symmetrically arranged on both sides of the outer wall of the air cylinder (82) along the center line of the air cylinder (82), and the center lines of the air inlet (822) and the air outlet (823) of each group of air ports coincide.

10. The negative pressure gas collection and mixed transmission boosting device according to claim 1, characterized in that: Each compressor assembly (3) further comprises a steel frame (7) for supporting and fixing the double-tube double-piston booster pump (6), and fixing seats are arranged on both sides of the bottom of the cylinder body (81), and the two fixing seats are bolted to the steel frame (7).

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