Device special for water drainage and gas recovery of oil and gas well

Abstract

The invention belongs to the technical field of oil and gas wells, and discloses an oil and gas well drainage and gas recovery special device which comprises a gas inlet assembly, the top end of the gas inlet assembly fixedly communicates with a power assembly, a sorting assembly is arranged below the rear end of the power assembly, and the top end of the power assembly communicates with the middle of the bottom end of the sorting assembly. And drainage and exhaust assemblies are arranged on the left side and the right side of the power assembly correspondingly, a linkage rod is fixedly connected between the top ends of the two drainage and exhaust assemblies in a sleeving mode, and the right sides of the top ends of the two drainage and exhaust assemblies communicate with the sorting assembly. By utilizing the gas production process of the device, inputting oil gas into the power assembly and matching the power assembly with the drainage and exhaust assembly, power conversion is achieved, automatic water pumping is completed, the whole process can be automatically completed, water flow can be automatically pumped and discharged, different devices do not need to be arranged for drainage and exhaust, and the device is simple in structure, convenient to use and high in efficiency. Unsmooth exhaust is avoided, and the drainage efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas wells, and in particular relates to a special device for draining water and producing gas in oil and gas wells. Background Art

[0002] Oil and gas well drainage and gas production is a measure to solve the problem of excessive liquid accumulation or water production in the wellbore and near the bottom of the well, and to restore the normal production of the gas well. It is a gas production process measure to drain the underground liquid to the ground by mechanical or chemical (or a combination of the two) methods to maintain the normal production of water-flooded wells or gas wells with difficulty in self-flowing water. The main purpose is to reduce the wellbore fluid pressure gradient, improve the inflow state of the fluid near the bottom of the well, and expand the natural gas blocked by water, so that the "dead gas" becomes "live gas" that can migrate into the bottom of the well and be produced, ultimately increasing the recovery rate of the gas reservoir.

[0003] Conventional oil and gas well drainage devices generally extract accumulated water mechanically or use external high-pressure gas to achieve drainage. However, since there is still gas near the bottom of the well, the existing technology will discharge this part of the gas together when draining water, and it is impossible to separate the gas from the accumulated water and discharge it, resulting in a significant decrease in drainage efficiency.

[0004] Some equipment will add exhaust devices to assist in exhaust, but this exhaust method requires the use of a separate air pump to extract the gas, and it must also be used in conjunction with a drainage device. At the same time, the exhaust device will still pump out some of the accumulated water when pumping air, resulting in poor exhaust and affecting the subsequent gas utilization process, which urgently needs to be improved. Summary of the invention

[0005] The object of the present invention is to provide a special device for draining water and producing gas in oil and gas wells to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a special device for draining water and producing gas in oil and gas wells, comprising an air intake assembly, the top of the air intake assembly is fixedly connected to a power assembly, a sorting assembly is provided at a position below the rear end of the power assembly, the top of the power assembly is connected to the middle of the bottom end of the sorting assembly, and drainage and exhaust assemblies are provided on the left and right sides of the power assembly, a linkage rod is fixedly sleeved between the tops of the two drainage and exhaust assemblies, the right sides of the tops of the two drainage and exhaust assemblies are connected to the sorting assembly, the left sides of the tops of the two drainage and exhaust assemblies are fixedly connected to exhaust branch pipes, the bottom ends of the two exhaust branch pipes are fixedly connected to exhaust three-way valves, the left sides of the bottom ends of the two drainage and exhaust assemblies are fixedly connected to drainage branch pipes, and the tops of the two drainage branch pipes are fixedly connected to the drainage three-way valve located directly below the exhaust three-way valve.

[0007] Before use, the bottom of the drainage and exhaust assembly needs to be placed in the accumulated water, and the bottom of the air intake assembly needs to be kept above the accumulated water, and the contact between the bottom of the air intake assembly and the accumulated water needs to be avoided as much as possible. At the same time, the drainage three-way valve needs to be connected to the external drainage pipe, and the exhaust three-way valve needs to be connected to the external exhaust channel, and the power of the device needs to be turned on to complete the preparations before drainage.

[0008] As a further technical solution of the present invention, the air intake assembly includes a negative pressure tube and a collecting chamber, an air pump is installed between the negative pressure tube and the collecting chamber, the top end of the negative pressure tube is connected to the bottom end of the power assembly, the output end of the collecting chamber is connected to the input end of the air pump, and the output end of the air pump is connected to the input end of the negative pressure tube.

[0009] When draining water and producing gas, the bottom of the collecting chamber can be kept away from contact with the sewage, and the air pump can be turned on at the same time. At this time, negative pressure can be generated inside the collecting chamber, and the oil and gas at the bottom of the oil and gas well can be sucked in through the collecting chamber, discharged through the negative pressure pipe, and enter the interior of the power component.

[0010] As a further technical solution of the present invention, the power assembly includes a power tank, a main shaft is movably connected in the middle of the power tank, an air inlet is fixedly connected in the middle of the bottom end of the power tank, an exhaust port is fixedly connected in the middle of the top end of the power tank, the air inlet is connected to the top end of the negative pressure pipe, and the exhaust port is connected to the sorting assembly.

[0011] As a further technical solution of the present invention, the outer side surface of the main shaft is fixedly sleeved with an impeller located inside the power tank, the left and right ends of the outer side surface of the main shaft are fixedly sleeved with a first connecting rod, the end of the first connecting rod away from the main shaft is movably connected to the second connecting rod through a rotating shaft, and the end of the second connecting rod away from the first connecting rod is movably sleeved with the outer side surface of the linkage rod.

[0012] When the oil and gas sucked in through the negative pressure pipe enter the interior of the air inlet and then the interior of the power tank, the oil and gas are then discharged through the exhaust port and enter the interior of the sorting component as they are sucked in.

[0013] As a further technical solution of the present invention, the sorting component includes a sorting box, which is connected to the drainage and exhaust component through a locking block. A recovery pipe is fixedly connected to the middle of the bottom end of the sorting box, and the recovery pipe is fixedly connected between one end away from the sorting box and the top of the exhaust port.

[0014] As a further technical solution of the present invention, an expanded polytetrafluoroethylene porous film is fixedly connected to a position near the top of the sorting box, and exhaust pipes are fixedly connected to the left and right sides of the top of the sorting box, and the other end of the exhaust pipe is connected to the drainage and exhaust assembly.

[0015] The oil and gas discharged through the exhaust port then enter the bottom of the inner cavity of the sorting box through the recovery pipe, while part of the water contained in the oil and gas can stay at the bottom of the sorting box. At the same time, the oil and gas can be filtered through the expanded polytetrafluoroethylene porous film and then discharged through the two exhaust pipes at the top of the sorting box, completing the separation process between part of the water contained in the oil and gas and the oil and gas.

[0016] Through the coordination between the air intake component, the power component and the sorting component, the device can actively absorb the oil and gas at the bottom of the oil and gas well. At the same time, the absorbed oil and gas can be separated through the action of the sorting component, so that there is no water in the oil and gas. The whole process is completed automatically, which not only realizes the active absorption of oil and gas, but also automatically separates water, significantly improving the quality of oil and gas and increasing the utilization rate.

[0017] As a further technical solution of the present invention, the drainage and exhaust assembly includes a treatment pipe, the right side of the bottom end of the treatment pipe is fixedly connected to a water inlet valve, the left side of the bottom end of the treatment pipe is fixedly connected to a drainage valve, the right side of the treatment pipe near the top is fixedly connected to an air inlet valve, and the left side of the treatment pipe near the top is fixedly connected to an exhaust valve.

[0018] As a further technical solution of the present invention, the air inlet valve is fixedly connected to the sorting component, the bottom end of the water inlet valve protrudes from the bottom end of the collecting chamber, the drain valve is fixedly connected to the drain branch pipe, and the exhaust valve is fixedly connected to the exhaust branch pipe.

[0019] As a further technical solution of the present invention, the water inlet valve and the air inlet valve are both one-way valves and the valve directions are both inwardly conductive and outwardly closed, and the drain valve and the exhaust valve are both one-way valves and the valve directions are both outwardly conductive and inwardly closed.

[0020] As a further technical solution of the present invention, a piston plate is movably sleeved inside the processing tube, a piston rod is fixedly connected to the top of the piston plate, the top of the piston rod passes through the top of the processing tube and is fixedly connected to a mounting seat, and the middle part of the mounting seat is fixedly sleeved with the linkage rod.

[0021] When oil and gas enter the power tank, the oil and gas can exert force on the impeller and push the impeller to rotate. At this time, the main shaft rotates accordingly and drives the first connecting rod to rotate. At this time, the second connecting rod swings accordingly and exerts force on the linkage rod at the same time. At this time, the linkage rod moves back and forth up and down, and drives the mounting seat and the piston rod to move back and forth up and down. When the piston plate moves upward, negative pressure can be generated at the bottom of the treatment pipe, and the accumulated water at the bottom of the oil and gas well can be sucked into the inside of the treatment pipe through the water inlet valve. When the piston plate moves downward, the accumulated water in the treatment pipe can be discharged through the drain valve. The accumulated water discharged through the drain valve can be discharged through two drainage branches and after being collected by the drainage three-way valve, completing the drainage process.

[0022] By utilizing the gas production process of the device and inputting oil and gas into the interior of the power component, the power conversion is realized through the cooperation between the power component and the drainage and exhaust component to complete automatic water pumping. The whole process can be completed automatically, and the extraction and discharge of water can be automatically realized. There is no need to set up different devices for drainage and exhaust, which avoids poor exhaust and improves drainage efficiency.

[0023] When the piston plate moves down, that is, when the water is drained, a negative pressure will be generated above the inside of the treatment pipe. At this time, the oil and gas can be sucked into the top of the treatment pipe through the sorting box and the recovery pipe through the intake valve. When the piston plate moves up, that is, when the water is sucked, the oil and gas at the top of the treatment pipe can be discharged through the exhaust valve. After being collected by the exhaust branch pipe and the exhaust three-way valve, the oil and gas discharge process is completed.

[0024] By reusing the process of the device actively absorbing oil and gas, it can realize the automatic extraction and automatic export of accumulated water, and can also complete the automatic extraction and automatic export of oil and gas. The drainage and gas production are carried out at the same time without interfering with each other, so that the device can quickly perform drainage and exhaust operations, further improving the drainage and gas production efficiency, simplifying the device and reducing production costs.

[0025] The beneficial effects of the present invention are as follows:

[0026] (1) The present invention utilizes the gas production process of the device and inputs oil and gas into the interior of the power component. Through the cooperation between the power component and the drainage and exhaust component, power conversion is realized to complete automatic water pumping. The entire process can be completed automatically, and the extraction and discharge of water flow can be automatically realized. There is no need to set up different devices for drainage and exhaust, which avoids poor exhaust and improves drainage efficiency.

[0027] (2) The present invention reuses the process of the device actively absorbing oil and gas, so that it can realize the automatic extraction and automatic export of accumulated water, and can also complete the automatic extraction and automatic export of oil and gas, and the drainage and gas production are carried out simultaneously without interfering with each other, so that the device can quickly perform drainage and exhaust operations, further improving the drainage and gas production efficiency, simplifying the device, and reducing production costs.

[0028] (3) The present invention achieves the coordination between the air intake assembly, the power assembly and the sorting assembly, so that the device can actively absorb the oil and gas at the bottom of the oil and gas well. At the same time, the absorbed oil and gas can be separated by the sorting assembly, so that the oil and gas do not contain water. The whole process is completed automatically, which can not only realize the active absorption of oil and gas, but also automatically separate water, thereby significantly improving the quality of oil and gas and increasing the utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the coordination of the air intake assembly, the power assembly and the sorting assembly structure of the present invention;

[0031] Figure 3 It is a separate cross-sectional schematic diagram of the sorting component structure of the present invention;

[0032] Figure 4 It is a schematic diagram of the coordination of the air intake assembly and the power assembly structure of the present invention;

[0033] Figure 5 It is a separate cross-sectional schematic diagram of the power assembly structure of the present invention;

[0034] Figure 6 It is a schematic diagram of the coordination of the drainage three-way valve and the exhaust three-way valve as well as the drainage and exhaust assembly structure of the present invention;

[0035] Figure 7 It is a schematic diagram of the cooperation between the drainage and exhaust assembly and the linkage rod structure of the present invention;

[0036] Figure 8 It is a separate cross-sectional schematic diagram of the drainage and exhaust assembly structure of the present invention.

[0037] In the figure: 1. air intake assembly; 101. negative pressure pipe; 102. air pump; 103. collecting chamber; 2. power assembly; 201. power tank; 202. air intake; 203. exhaust port; 204. main shaft; 205. impeller; 206. first connecting rod; 207. second connecting rod; 3. sorting assembly; 301. sorting box; 302. recovery pipe; 303. exhaust pipe; 304. expanded polytetrafluoroethylene porous film; 4. drainage branch pipe; 5. drainage three-way valve; 6. exhaust branch pipe; 7. exhaust three-way valve; 8. drainage and exhaust assembly; 801. treatment pipe; 802. piston plate; 803. piston rod; 804. mounting seat; 805. water inlet valve; 806. drainage valve; 807. air intake valve; 808. exhaust valve; 9. linkage rod. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0039] like Figures 1 to 8As shown, in an embodiment of the present invention, a special device for draining water and producing gas in oil and gas wells includes an air intake component 1, the top of the air intake component 1 is fixedly connected to a power component 2, a sorting component 3 is provided at a lower position below the rear end of the power component 2, the top of the power component 2 is connected to the middle of the bottom end of the sorting component 3, and drainage and exhaust components 8 are provided on the left and right sides of the power component 2. A linkage rod 9 is fixedly sleeved between the tops of the two drainage and exhaust components 8, the right sides of the tops of the two drainage and exhaust components 8 are connected to the sorting component 3, the left sides of the tops of the two drainage and exhaust components 8 are fixedly connected to exhaust branch pipes 6, the bottom ends of the two exhaust branch pipes 6 are fixedly connected to exhaust three-way valves 7, the left sides of the bottom ends of the two drainage and exhaust components 8 are fixedly connected to drainage branch pipes 4, and the tops of the two drainage branch pipes 4 are fixedly connected to drainage three-way valves 5 located directly below the exhaust three-way valve 7.

[0040] Before use, the bottom end of the drainage and exhaust assembly 8 needs to be placed in the accumulated water, and the bottom end of the air intake assembly 1 needs to be kept above the accumulated water, and the contact between the bottom end of the air intake assembly 1 and the accumulated water needs to be avoided as much as possible. At the same time, the drainage three-way valve 5 needs to be connected to the external drainage pipe, and the exhaust three-way valve 7 needs to be connected to the external exhaust channel, and the power supply of the device needs to be turned on to complete the preparation before drainage.

[0041] like Figure 1 and Figure 2 as well as Figure 4 As shown, the air intake assembly 1 includes a negative pressure tube 101 and a collecting chamber 103, an air pump 102 is installed between the negative pressure tube 101 and the collecting chamber 103, the top end of the negative pressure tube 101 is connected to the bottom end of the power assembly 2, the output end of the collecting chamber 103 is connected to the input end of the air pump 102, and the output end of the air pump 102 is connected to the input end of the negative pressure tube 101.

[0042] When draining water and producing gas, the bottom end of the collecting chamber 103 can be kept away from contact with the sewage, and the air pump 102 can be turned on at the same time. At this time, negative pressure can be generated inside the collecting chamber 103, and the oil and gas at the bottom of the oil and gas well can be sucked in through the collecting chamber 103, and discharged through the negative pressure pipe 101 and enter the interior of the power component 2.

[0043] like Figure 1 and Figure 2 as well as Figure 4 and Figure 5As shown, the power assembly 2 includes a power tank 201. A main shaft 204 is movably connected to the middle of the power tank 201. The middle of the bottom end of the power tank 201 is fixedly communicated with an air inlet 202. The middle of the top end of the power tank 201 is fixedly communicated with an exhaust port 203. The air inlet 202 is communicated with the top end of the negative pressure pipe 101. The exhaust port 203 is communicated with the sorting assembly 3. An impeller 205 located inside the power tank 201 is fixedly sleeved on the outer side of the main shaft 204. First connecting rods 206 are fixedly sleeved on both the left and right ends of the outer side of the main shaft 204. One end of each first connecting rod 206 away from the main shaft 204 is movably connected with a second connecting rod 207 through a rotating shaft. One end of each second connecting rod 207 away from the first connecting rod 206 is movably sleeved on the outer side of the linkage rod 9.

[0044] When the oil-gas inhaled through the negative pressure pipe 101 enters the inside of the air inlet 202 and then enters the inside of the power tank 201. At this time, with the inhalation of the oil-gas, the oil-gas is exported through the exhaust port 203 and enters the inside of the sorting assembly 3.

[0045] As Figure 1 and Figure 2 as well as Figure 3 shown, the sorting assembly 3 includes a sorting box 301. The sorting box 301 is connected to the drainage and exhaust assembly 8 through a locking block. The middle of the bottom end of the sorting box 301 is fixedly communicated with a recovery pipe 302. One end of the recovery pipe 302 away from the sorting box 301 is fixedly communicated with the top end of the exhaust port 203. An expanded polytetrafluoroethylene porous film 304 is fixedly connected to the position of the sorting box 301 near the top end. The left and right sides of the top end of the sorting box 301 are fixedly communicated with air extraction pipes 303. The other ends of the air extraction pipes 303 are communicated with the drainage and exhaust assembly 8.

[0046] The oil-gas exported through the exhaust port 203 then enters the bottom end position of the inner cavity of the sorting box 301 through the recovery pipe 302. Part of the water contained in the oil-gas can stay at the bottom end of the sorting box 301. At the same time, the oil-gas can be exported through the two air extraction pipes 303 at the top end of the sorting box 301 after being filtered by the expanded polytetrafluoroethylene porous film 304, completing the separation process between part of the water contained in the oil-gas and the oil-gas.

[0047] Through the cooperative action among the intake assembly 1, the power assembly 2 and the sorting assembly 3, the device can actively suck the oil-gas at the bottom end of the oil-gas well. At the same time, the sucked oil-gas can be separated through the action of the sorting assembly 3, so that the oil-gas does not contain water. The whole process is automatically completed. It can not only realize the active suction of the oil-gas, but also automatically separate the water, significantly improving the quality of the oil-gas and the utilization rate.

[0048] As Figure 1 and Figure 6 as well as Figure 7 and Figure 8As shown, the drainage and exhaust assembly 8 includes a processing pipe 801, a water inlet valve 805 is fixedly connected to the right side of the bottom end of the processing pipe 801, a drainage valve 806 is fixedly connected to the left side of the bottom end of the processing pipe 801, an air inlet valve 807 is fixedly connected to the right side of the processing pipe 801 near the top, and an exhaust valve 808 is fixedly connected to the left side of the processing pipe 801 near the top. The air inlet valve 807 is fixedly connected to the sorting assembly 3, the bottom end of the water inlet valve 805 protrudes from the bottom end of the collecting chamber 103, the drainage valve 806 is fixedly connected to the drainage branch pipe 4, and the exhaust valve 808 is fixedly connected to the drainage branch pipe 4. It is fixedly connected with the exhaust branch pipe 6, the water inlet valve 805 and the air inlet valve 807 are both one-way valves, and the valve directions are both inward conduction and outward blockage, the drain valve 806 and the exhaust valve 808 are both one-way valves, and the valve directions are outward conduction and inward blockage, the internal movable sleeve of the processing tube 801 is connected with a piston plate 802, the top of the piston plate 802 is fixedly connected with a piston rod 803, the top of the piston rod 803 passes through the top of the processing tube 801 and is fixedly connected with a mounting seat 804, and the middle part of the mounting seat 804 is fixedly sleeved with the linkage rod 9.

[0049] Embodiment: When oil and gas enter the interior of the power tank 201, the oil and gas can exert a force on the impeller 205 and push the impeller 205 to rotate. At this time, the main shaft 204 rotates accordingly and drives the first connecting rod 206 to rotate. At this time, the second connecting rod 207 swings accordingly and exerts a force on the linkage rod 9 at the same time. At this time, the linkage rod 9 moves back and forth up and down, and drives the mounting seat 804 and the piston rod 803 to move back and forth up and down. When the piston plate 802 moves upward, a negative pressure can be generated below the inside of the processing tube 801, and the accumulated water at the bottom of the oil and gas well is sucked into the inside of the processing tube 801 through the water inlet valve 805. When the piston plate 802 moves downward, the accumulated water in the processing tube 801 can be discharged through the drain valve 806. The accumulated water discharged through the drain valve 806 can be discharged through the two drainage branches 4 and after being collected by the drainage three-way valve 5, completing the drainage process.

[0050] By utilizing the gas production process of the device and inputting oil and gas into the interior of the power component 2, the power conversion is realized through the cooperation between the power component 2 and the drainage and exhaust component 8, and automatic water pumping is completed. The whole process can be completed automatically, and the extraction and discharge of water flow can be automatically realized. There is no need to set up different devices for drainage and exhaust, which avoids poor exhaust and improves drainage efficiency.

[0051] Embodiment: When the piston plate 802 moves downward, that is, when the water drainage operation is performed, a negative pressure can be generated above the inside of the processing tube 801. At this time, the oil and gas can be sucked into the top of the processing tube 801 through the sorting box 301 and the recovery pipe 302 through the intake valve 807. When the piston plate 802 moves upward, that is, when the water absorption operation is performed, the oil and gas at the top of the processing tube 801 can be discharged through the exhaust valve 808, and after being collected by the exhaust branch pipe 6 and the exhaust three-way valve 7, the oil and gas discharge process is completed.

[0052] By reusing the process of the device actively absorbing oil and gas, it can realize the automatic extraction and automatic export of accumulated water, and can also complete the automatic extraction and automatic export of oil and gas. The drainage and gas production are carried out at the same time without interfering with each other, so that the device can quickly perform drainage and exhaust operations, further improving the drainage and gas production efficiency, simplifying the device and reducing production costs.

[0053] Working principle and usage process:

[0054] Before use, the bottom end of the drainage and exhaust assembly 8 needs to be placed in the accumulated water, and the bottom end of the air intake assembly 1 needs to be kept above the accumulated water, and the contact between the bottom end of the air intake assembly 1 and the accumulated water should be avoided as much as possible. At the same time, the drainage three-way valve 5 needs to be connected to the external drainage pipe, and the exhaust three-way valve 7 needs to be connected to the external exhaust channel, and the power supply of the device needs to be turned on to complete the preparation before drainage;

[0055] When draining water and collecting gas, the bottom of the collecting chamber 103 can be kept away from the sewage, and the air pump 102 can be turned on at the same time, so that negative pressure can be generated inside the collecting chamber 103, and the oil and gas at the bottom of the oil and gas well can be sucked in through the collecting chamber 103, and discharged through the negative pressure pipe 101 and enter the inside of the power assembly 2;

[0056] When the oil and gas sucked in through the negative pressure pipe 101 enters the interior of the air inlet 202 and enters the interior of the power tank 201, the oil and gas are drawn out through the exhaust port 203 and enter the interior of the sorting component 3 as the oil and gas are sucked in;

[0057] The oil and gas guided out through the exhaust port 203 then enter the bottom end of the inner cavity of the separation box 301 through the recovery pipe 302, and part of the water contained in the oil and gas can stay at the bottom end of the separation box 301. At the same time, the oil and gas can be filtered by the expanded polytetrafluoroethylene porous film 304 and then guided out through the two exhaust pipes 303 at the top of the separation box 301, completing the separation process between the part of the water contained in the oil and gas and the oil and gas.

[0058] When the oil and gas enter the interior of the power tank 201, the oil and gas can exert a force on the impeller 205 and push the impeller 205 to rotate. At this time, the main shaft 204 rotates accordingly and drives the first connecting rod 206 to rotate. At this time, the second connecting rod 207 swings accordingly and exerts a force on the linkage rod 9 at the same time. At this time, the linkage rod 9 moves back and forth up and down, and drives the mounting seat 804 and the piston rod 803 to move back and forth up and down. When the piston plate 802 moves upward, a negative pressure can be generated below the inside of the processing tube 801, and the accumulated water at the bottom of the oil and gas well is sucked into the inside of the processing tube 801 through the water inlet valve 805. When the piston plate 802 moves downward, the accumulated water in the processing tube 801 can be discharged through the drain valve 806. The accumulated water discharged through the drain valve 806 can be discharged through the two drainage branches 4 and after being collected by the drainage three-way valve 5, completing the drainage process;

[0059] When the piston plate 802 moves downward, that is, when the water is drained, a negative pressure can be generated above the inside of the processing tube 801. At this time, the oil and gas can be sucked into the top of the processing tube 801 through the sorting box 301 and the recovery pipe 302 through the intake valve 807. When the piston plate 802 moves upward, that is, when the water absorption operation is performed, the oil and gas at the top of the processing tube 801 can be discharged through the exhaust valve 808, and after being collected by the exhaust branch pipe 6 and the exhaust three-way valve 7, the oil and gas discharge process is completed.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dedicated device for draining water and recovering gas from oil and gas wells, comprising an air intake assembly (1), characterized in that: The top of the air intake assembly (1) is fixedly connected to the power assembly (2), a sorting assembly (3) is provided at a position below the rear end of the power assembly (2), the top of the power assembly (2) is connected to the middle of the bottom of the sorting assembly (3), the left and right sides of the power assembly (2) are provided with drainage and exhaust assemblies (8), a linkage rod (9) is fixedly sleeved between the tops of the two drainage and exhaust assemblies (8), the right sides of the tops of the two drainage and exhaust assemblies (8) are connected to the sorting assembly (3), the left sides of the tops of the two drainage and exhaust assemblies (8) are fixedly connected to the exhaust branch pipe (6), the bottom ends of the two exhaust branch pipes (6) are fixedly connected to the exhaust three-way valve (7), the left sides of the bottom ends of the two drainage and exhaust assemblies (8) are fixedly connected to the drainage branch pipe (4), and the top ends of the two drainage branch pipes (4) are fixedly connected to the drainage three-way valve (5) located directly below the exhaust three-way valve (7).

2. The dedicated device for draining water and producing gas in oil and gas wells according to claim 1, characterized in that: The air intake assembly (1) comprises a negative pressure tube (101) and a collecting chamber (103); an air pump (102) is installed between the negative pressure tube (101) and the collecting chamber (103); the top end of the negative pressure tube (101) is connected to the bottom end of the power assembly (2); the output end of the collecting chamber (103) is connected to the input end of the air pump (102); and the output end of the air pump (102) is connected to the input end of the negative pressure tube (101).

3. The dedicated device for draining water and recovering gas from oil and gas wells according to claim 2, characterized in that: The power assembly (2) comprises a power tank (201), the middle part of which is movably connected to a main shaft (204), the middle part of the bottom end of the power tank (201) is fixedly connected to an air inlet (202), the middle part of the top end of the power tank (201) is fixedly connected to an exhaust port (203), the air inlet (202) is connected to the top end of a negative pressure tube (101), and the exhaust port (203) is connected to a sorting assembly (3).

4. The dedicated device for draining water and producing gas in oil and gas wells according to claim 3, characterized in that: The outer side surface of the main shaft (204) is fixedly sleeved with an impeller (205) located inside the power tank (201); the left and right ends of the outer side surface of the main shaft (204) are fixedly sleeved with a first connecting rod (206); the end of the first connecting rod (206) away from the main shaft (204) is movably connected to a second connecting rod (207) via a rotating shaft; the end of the second connecting rod (207) away from the first connecting rod (206) is movably sleeved with the outer side surface of the linkage rod (9).

5. The dedicated device for draining water and recovering gas from oil and gas wells according to claim 4, characterized in that: The sorting assembly (3) comprises a sorting box (301), the sorting box (301) being connected to the drainage and exhaust assembly (8) via a locking block, a recovery pipe (302) being fixedly connected to the middle of the bottom end of the sorting box (301), and an end of the recovery pipe (302) away from the sorting box (301) being fixedly connected to the top end of the exhaust port (203).

6. The dedicated device for draining water and recovering gas from oil and gas wells according to claim 5, characterized in that: An expanded polytetrafluoroethylene porous film (304) is fixedly connected to a position near the top of the sorting box (301), and an exhaust pipe (303) is fixedly connected to the left and right sides of the top of the sorting box (301), and the other end of the exhaust pipe (303) is connected to the drainage exhaust assembly (8).

7. The dedicated device for draining water and recovering gas from oil and gas wells according to claim 6, characterized in that: The drainage and exhaust assembly (8) comprises a treatment pipe (801), wherein the right side of the bottom end of the treatment pipe (801) is fixedly connected to a water inlet valve (805), the left side of the bottom end of the treatment pipe (801) is fixedly connected to a drainage valve (806), the right side of the treatment pipe (801) near the top end is fixedly connected to an air inlet valve (807), and the left side of the treatment pipe (801) near the top end is fixedly connected to an exhaust valve (808).

8. The dedicated device for draining water and recovering gas from oil and gas wells according to claim 7, characterized in that: The air inlet valve (807) is fixedly connected to the sorting component (3), the bottom end of the water inlet valve (805) protrudes from the bottom end of the collecting chamber (103), the drainage valve (806) is fixedly connected to the drainage branch pipe (4), and the exhaust valve (808) is fixedly connected to the exhaust branch pipe (6).

9. The dedicated device for draining water and recovering gas from oil and gas wells according to claim 8, characterized in that: The water inlet valve (805) and the air inlet valve (807) are both one-way valves, and the valve directions are both inwardly conductive and outwardly closed. The drain valve (806) and the exhaust valve (808) are both one-way valves, and the valve directions are both outwardly conductive and inwardly closed.

10. The dedicated device for draining water and recovering gas from oil and gas wells according to claim 9, characterized in that: The processing tube (801) is internally movably sleeved with a piston plate (802), the top end of the piston plate (802) is fixedly connected with a piston rod (803), the top end of the piston rod (803) passes through the top end of the processing tube (801) and is fixedly connected with a mounting seat (804), and the middle part of the mounting seat (804) is fixedly sleeved with the linkage rod (9).

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