Foam drainage gas recovery device for oil field production gas well

Abstract

The invention discloses an oil field production gas well foam drainage gas recovery device which comprises a supporting frame, a plurality of moving wheels are installed at the bottom of the supporting frame, a foaming agent storage assembly is arranged on one side of the supporting frame, a collection and treatment outer frame is arranged on the other side of the supporting frame, and a balance filling mechanism is arranged on the foaming agent storage assembly. A defoaming agent storage box is arranged at the top of the collection treatment outer frame; the foaming agent storage assembly and the collection and treatment outer frame are connected with the gas recovery well, and the collection and treatment outer frame is used for collecting gas and liquid carried by foam sprayed out of the gas recovery well, treating the gas and the liquid and then discharging the gas and the liquid. The problems that in the prior art, the foaming agent filling speed is not controlled, and continuous filling is difficult to achieve are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of foam water drainage and gas production, and in particular relates to a foam water drainage and gas production device for a gas well in an oil field. Background Art

[0002] The foam drainage gas production process is an injection and drainage process that adds surfactants to the well. Foam drainage gas production has the advantages of simple equipment, easy construction, quick results, low cost, and no impact on gas well production. It is widely used in gas production.

[0003] Surfactants, also known as foaming agents, are injected into the wellbore. When the bottomwater comes into contact with the foaming agent, the natural gas flow stirs it, generating a large amount of low-density, aqueous foam. This foam is carried from the bottomwell to the surface by the airflow, effectively removing the bottomwater. Furthermore, after the natural gas, carrying the bubbles, rises to the surface, a defoamer is injected into the pipeline before it joins the equipment to remove the foam. To prevent the foam from entering surface process equipment and disrupting normal production, the foam formed by the foaming agent must be stable, have a strong water-carrying capacity, and have a certain thermal conductivity. Each foaming agent should be used in a suitable defoamer combination. Foam drainage and gas recovery is suitable for dewatering gas wells with weak or intermittent water flow.

[0004] Currently, liquid or solid foaming agents are added to gas wells. However, both solid and liquid foaming agents are added at the wellhead and then fall to the bottom of the well due to the foaming agent's own gravity. This makes it difficult to control the foaming agent's injection speed, and the speed and time for the foaming agent to reach the bottom of the well are uncontrolled, making it difficult to achieve continuous injection. As a result, the foaming agent needs more time to contact the bottom of the well material, affecting the foaming efficiency and foaming effect of the foaming agent. Summary of the Invention

[0005] The purpose of the present invention is to provide a foam drainage and gas production device for oil field production gas wells, which solves the problems in the prior art of uncontrolled foaming agent injection speed and difficulty in achieving continuous injection.

[0006] The technical solution adopted by the present invention is a foam drainage and gas production device for oil field gas wells, comprising a support frame, a plurality of movable wheels installed at the bottom of the support frame, a foaming agent storage assembly arranged on one side of the support frame, a collecting and processing outer frame arranged on the other side of the support frame, a balancing and filling mechanism arranged on the foaming agent storage assembly, and a defoaming agent storage box arranged on the top of the collecting and processing outer frame; the foaming agent storage assembly and the collecting and processing outer frame are connected to the gas production well, and the collecting and processing outer frame is used to collect gas and liquid carried by the foam ejected from the gas production well, and to process the gas and liquid and then discharge them.

[0007] The present invention is also characterized in that:

[0008] The foaming agent storage assembly includes a foaming agent storage box and a foaming agent filling pipe. The foaming agent storage box is installed on the top of the support frame, and a pressure gauge is installed on the top of the foaming agent storage box; the foaming agent filling pipe is installed inside the foaming agent storage box;

[0009] The balanced filling mechanism includes a first filling assembly, a second filling assembly and an air pressure balance assembly. The first filling assembly and the air pressure balance assembly are respectively installed on the top of the foaming agent storage box. The air pressure balance assembly is used to balance the air pressure in the foaming agent storage box. The air pressure balance assembly is connected to the defoaming agent storage box, which is installed on the top of the collection and processing outer frame.

[0010] The first filling assembly includes a first air pump and an elastic sealing piece. The first air pump is installed on the top of the foaming agent storage box, and the elastic sealing piece is installed on the side wall of the inner cavity of the foaming agent storage box. The first air pump passes through the foaming agent storage box and is connected to the elastic sealing piece. A feeding pipe group is installed on the upper part of the foaming agent storage box, and the height of the feeding pipe group extending to the inner cavity of the foaming agent storage box is not higher than the height of the connection between the elastic sealing piece and the inner wall of the foaming agent storage box.

[0011] The air pressure balancing assembly includes a balancing shell, which is installed on one side of the top of the foaming agent storage box. An adjusting motor is fixedly installed on one side of the balancing shell. The output end of the adjusting motor is horizontally fixed to a threaded column. The surface of the threaded column is threadedly connected to a movable plate. The top of the movable plate is vertically connected to a switching plate. An elastic separation belt is provided in the inner cavity of the balancing shell. The elastic separation belt is provided in parallel with the threaded column. The elastic separation belt is located on both sides of the threaded column. The elastic separation belt is slidably connected to the switching plate. A limit strip is installed on the inner wall of the balancing shell. The limit strip is slidably connected to the side of the switching plate.

[0012] A movable discharge port is opened at the center of the switching plate, and two symmetrically distributed fixed discharge ports are opened on the top of the balancing shell. Both the movable discharge port and the fixed discharge port are circular, and the distance between the two fixed discharge ports is greater than the diameter of the movable discharge port; an air release valve pipe is installed at one of the fixed discharge ports, and the air release valve pipe is connected to the foaming agent storage box; a connecting valve pipe is installed at the other fixed discharge port, and the end of the connecting valve pipe away from the balancing shell is connected to one side of the defoaming agent storage box.

[0013] The collection and processing outer frame includes a collection and processing shell, which is installed on the top of the support frame. A gas-liquid collection pipe is arranged inside the collection and processing shell, and the end of the gas-liquid collection pipe is connected to the gas well; an exhaust pipe and a drain pipe are installed on the side of the collection and processing shell away from the foaming agent storage box, and the exhaust pipe is located above the drain pipe.

[0014] A power conversion assembly is arranged inside the outer frame of the collection and processing, and the power conversion assembly includes a mounting shell, which is connected to the inner cavity side wall of the collection and processing shell through multiple fixed columns; a rotating shaft is horizontally provided through the two side surfaces inside the mounting shell, and both ends of the rotating shaft are rotatably connected to the inner cavity side wall of the collection and processing shell respectively; the rotating shaft is radially sleeved with a number of rotating plates, and the several rotating plates are all located inside the mounting shell, the gas-liquid collection pipe is connected to the mounting shell, and the mounting shell is installed at the end of the gas-liquid collection pipe away from the gas well.

[0015] An anti-backflow component is installed at one end of the rotating shaft. The anti-backflow component includes a ratchet and ratchet teeth. The ratchet is installed on the surface of the rotating shaft, the ratchet teeth are set on the side of the ratchet, and the ratchet teeth are installed on the side wall of the inner cavity of the collection and processing shell.

[0016] A mixing and processing component is sleeved on the rotating shaft, and the mixing and processing component includes multiple stirring plates, which are installed in the radial direction of the rotating shaft in sequence. A connecting bearing is sleeved on the radial end of the rotating shaft, and the connecting bearing is connected to the filter screen; a plurality of first springs are installed on the side of the filter screen away from the stirring plate, and one end of the plurality of first springs away from the filter screen is fixedly connected to the side wall of the inner cavity of the collection and processing shell; an annular elastic band is connected to the side of the filter screen away from the rotating shaft, and the annular elastic band is connected to the side wall of the inner cavity of the collection and processing shell.

[0017] An anti-blocking assembly is provided in the stirring plate closest to the filter screen, the anti-blocking assembly comprising a mounting plate, an anti-blocking brush being installed on one side of the mounting plate close to the filter screen, a plurality of connecting posts being connected to the other side of the mounting plate, a connecting plate being provided on an end of the connecting posts away from the mounting plate, a plurality of second springs being installed on a side of the connecting plate away from the connecting posts, and the second springs being installed on a side wall of the inner cavity of the filter screen;

[0018] A vibration component is arranged on the outer edge of the anti-blocking brush away from the filter screen. The vibration component includes a special-shaped ring, which is fixed to the side wall of the inner cavity of the collection and processing shell through multiple mounting columns. The special-shaped ring is rotatably connected to multiple rotating balls on the side close to the mounting plate, and the rotating balls are in contact with the mounting plate; one side of the mounting plate is rotatably connected to the center shaft, and the center shaft is mounted on the surface of the rotating shaft.

[0019] The second filling assembly includes a second air pump, which is installed on the top of the foaming agent storage box. The outlet end of the second air pump is connected to the connecting pipe, and the end of the connecting pipe away from the second air pump is connected to the expansion airbag; an anti-sealing plate is installed on the inner side of the foaming agent filling pipe near the foaming agent filling pipe, and a plurality of dividing strips are fixed to the side of the anti-sealing plate away from the foaming agent filling pipe, and anti-sealing openings are opened at the positions of two adjacent dividing strips.

[0020] The beneficial effects of the present invention are as follows: the present invention utilizes a balanced filling mechanism to add the foaming agent in the foaming agent storage box into the gas production well, utilizes the first filling component or the second filling component to add gas into the foaming agent storage box, and pressurizes the foaming agent in the foaming agent storage box to add the foaming agent into the gas injection well. The present invention controls the filling speed of the foaming agent by controlling the filling speed of the first filling component or the second filling component, controls the speed at which the foaming agent flows into the bottom of the well, makes the foaming agent evenly contact with the bottom well material, and realizes continuous filling of the foaming agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the foam drainage and gas production device for oil field gas wells of the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of the overall internal structure;

[0023] Figure 3 for Figure 1 A schematic diagram of the internal side structure of the collection and processing shell;

[0024] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the anti-backflow component;

[0025] Figure 5 for Figure 1 A side structural diagram of the positional relationship between the rotating shaft, stirring plate, connecting column and connecting plate;

[0026] Figure 6 for Figure 1 A schematic structural diagram of the positional relationship between the special-shaped ring and the fixed column;

[0027] Figure 7 for Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0028] Figure 8 for Figure 2 A schematic diagram of the partially enlarged structure at point B in the middle;

[0029] Figure 9 for Figure 1 Schematic diagram of the three-dimensional structure of the mixing processing component;

[0030] Figure 10 for Figure 1 Schematic diagram of the internal cross-sectional structure of the balance shell;

[0031] Figure 11 for Figure 1 Schematic diagram of the three-dimensional structure of the air pressure balance component;

[0032] Figure 12 for Figure 1Schematic diagram of the structure of the second filling component.

[0033] In the figure, 1. Support frame, 2. Foaming agent storage assembly, 21. Foaming agent storage box, 22. Foaming agent filling pipe, 3. First filling assembly, 31. First air pump, 32. Elastic sealing sheet, 4. Air pressure balance assembly, 41. Balance shell, 42. Adjustment motor, 43. Threaded column, 44. Moving plate, 45. Switching plate, 46. Release valve pipe, 47. Connecting valve pipe, 48. Elastic separation belt, 49. Limiting strip, 5. Collection and processing outer frame, 51. Collection and processing shell, 52. Gas-liquid collection pipe, 53. Exhaust pipe, 54. Drain pipe, 6. Defoaming agent storage box, 7. Anti-backflow assembly, 71. Ratchet, 72. Ratchet, 8. Power conversion assembly, 81. Installation shell, 82. Rotation Moving shaft, 83. Rotating plate, 84. Fixed column, 9. Mixing and processing component, 91. Stirring plate, 92. Filter, 93. First spring, 94. Annular elastic belt, 95. Connecting bearing, 10. Anti-blocking component, 101. Mounting plate, 102. Anti-blocking brush, 103. Connecting column, 104. Connecting plate, 105. Second spring, 11. Vibrating component, 111. Special-shaped ring, 112. Mounting column, 113. Rotating ball, 114. Center shaft, 12. Second filling component, 121. Second air pump, 122. Connecting pipe, 123. Inflatable airbag, 124. Anti-sealing plate, 125. Separating strip, 126. Anti-sealing port, 13. Moving wheel, 14. Feeding pipe assembly, 15. Pressure gauge. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] The foam drainage and gas production device of the oil field production gas well of the present invention has a structure as follows Figure 1 As shown, it includes a support frame 1, a plurality of moving wheels 13 are installed at the bottom of the support frame 1, a foaming agent storage assembly 2 is provided on one side of the support frame 1, and a collection and processing outer frame 5 is provided on the other side of the support frame 1. A balancing filling mechanism is provided on the foaming agent storage assembly 2, and a defoaming agent storage box 6 is provided on the top of the collection and processing outer frame 5; the foaming agent storage assembly 2 and the collection and processing outer frame 5 are connected to the gas production well, and the collection and processing outer frame 5 is used to collect gas and liquid carried by foam ejected from the gas production well, and to process the gas and liquid before discharging them;

[0037] Example 2

[0038] like Figure 2As shown, the foaming agent storage assembly 2 includes a foaming agent storage box 21 and a foaming agent filling pipe 22. The foaming agent storage box 21 is installed on the top of the support frame 1. The foaming agent storage box 21 is used to store the foaming agent. A pressure gauge 15 is installed on the upper part of the foaming agent storage box 21. The foaming agent filling pipe 22 is installed inside the foaming agent storage box 21, and the foaming agent filling pipe 22 is connected to the gas well.

[0039] The balanced filling mechanism includes a first filling component 3, a second filling component 12 and an air pressure balance component 4. The first filling component 3 and the air pressure balance component 4 are respectively installed on the top of the foaming agent storage box 21. The air pressure balance component 4 is used to balance the air pressure in the foaming agent storage box 21; the air pressure balance component 4 is connected to the defoaming agent storage box 6, and the defoaming agent storage box 6 is installed on the top of the collection and processing outer frame 5. The defoaming agent storage box 6 is used to store and add defoaming agent to the collection and processing outer frame 5.

[0040] The first filling assembly 3 includes a first air pump 31 and an elastic sealing sheet 32. The first air pump 31 is mounted on the top of the foaming agent storage box 21, and the elastic sealing sheet 32 ​​is mounted on the inner wall of the foaming agent storage box 21. The first air pump 31 penetrates the foaming agent storage box 21 and connects to the elastic sealing sheet 32. A feeding pipe assembly 14 is installed on the top of the foaming agent storage box 21. The height of the portion of the feeding pipe assembly 14 extending into the inner cavity of the foaming agent storage box 21 is no higher than the height of the connection between the elastic sealing sheet 32 ​​and the inner wall of the foaming agent storage box 21. The first air pump 31 pressurizes the elastic sealing sheet 32, injecting the foaming agent in the foaming agent storage box 21 into the gas production well. The injection speed of the first air pump 31 controls the filling speed of the foaming agent.

[0041] The air pressure balance assembly 4 includes a balance housing 41, such as Figure 10 and Figure 11 As shown, a balancing housing 41 is mounted on one side of the top of the foaming agent storage box 21. An adjustment motor 42 is fixedly mounted on one side of the balancing housing 41. The output end of the adjustment motor 42 is horizontally fixed to a threaded column 43. The surface of the threaded column 43 is threadedly connected to a movable plate 44. The top of the movable plate 44 is vertically connected to a switching plate 45. An elastic separation strip 48 is provided in the inner cavity of the balancing housing 41. The elastic separation strip 48 is arranged parallel to the threaded column 43 and is located on both sides of the threaded column 43. The elastic separation strip 48 slides and engages the switching plate 45. The elastic separation strip 48 increases the tightness of the connection between the switching plate 45 and the inner wall of the balancing housing 41, thereby improving the switching effect of the switching plate 45. A limit bar 49 is installed on the inner wall of the balancing housing 41 and is slidably connected to the side of the switching plate 45.

[0042] A movable exhaust port is located at the center of the switching plate 45, while two symmetrically distributed fixed exhaust ports are located at the top of the balancing housing 41. Both the movable and fixed exhaust ports are circular, and the distance between the two fixed exhaust ports is greater than the diameter of the movable exhaust port. A vent valve pipe 46 is installed at one of the fixed exhaust ports, connecting to the foaming agent storage tank 21. A connecting valve pipe 47 is installed at the other fixed exhaust port, with the end of the connecting valve pipe 47 away from the balancing housing 41 connected to one side of the defoaming agent storage box 6. The air pressure balancing assembly 4 is used to vent the air pressure within the first filling assembly 3 to the surrounding environment. When processing a natural gas mixture, the air is discharged into the defoaming agent storage box 6 through the connecting valve pipe 47, ensuring that the defoaming agent in the defoaming agent storage box 6 is evenly added to the collection and processing housing 51.

[0043] Example 3

[0044] The outer collection and processing frame 5 includes a collection and processing housing 51, which is mounted on top of the support frame 1. A gas-liquid collection pipe 52 is disposed within the collection and processing housing 51, the end of which is connected to a gas production well. An exhaust pipe 53 and a drain pipe 54 are mounted on the side of the collection and processing housing 51 away from the foaming agent storage tank 21, with the exhaust pipe 53 located above the drain pipe 54. The collection and processing outer frame 5 is used to collect gas and liquid carried by foam ejected from the gas production well. After treatment, the gas and liquid are respectively fed into the exhaust and drain pipes through the exhaust pipe 53 and drain pipe 54. The gas, liquid, and other substances carried by the foam ejected from the gas production well enter the collection and processing housing 51 through the gas-liquid collection pipe 52. After treatment, the gas is discharged from the exhaust pipe 53, and the liquid is discharged from the drain pipe 54.

[0045] A power conversion assembly 8 is provided within the collection and processing outer frame 5, and is used to convert the power of the material ejected from the gas well into the power of the rotating mixing and processing assembly. The power conversion assembly 8 includes a mounting shell 81, which is connected to the inner cavity side wall of the collection and processing shell 51 via a plurality of fixing columns 84; a rotating shaft 82 is provided horizontally through the two side surfaces of the interior of the mounting shell 81, and the two ends of the rotating shaft 82 are respectively rotatably connected to the inner cavity side wall of the collection and processing shell 51; the rotating shaft 82 is radially sleeved with a plurality of rotating plates 83, and the plurality of rotating plates 83 are all located within the mounting shell 81. The gas-liquid collection pipe 52 is connected to the mounting shell 81, and the mounting shell 81 is installed at the end of the gas-liquid collection pipe 52 away from the gas well; the gas, liquid and other substances carried by the foam ejected from the gas well enter the mounting shell 81 through the gas-liquid collection pipe 52, and the power of the ejection drives the rotating plates 83 to rotate, thereby driving the rotating shaft 82 to rotate.

[0046] An anti-backflow assembly 7 is installed at one end of the rotating shaft 82. The anti-backflow assembly 7 includes a ratchet 71 and a ratchet 72. The ratchet 71 is installed on the surface of the rotating shaft 82. The ratchet 72 is set on the side of the ratchet 71. The ratchet 72 is installed on the side wall of the inner cavity of the collection and processing shell 51. The anti-backflow assembly 7 is used to prevent the gas and liquid ejected from the gas well from flowing back into the gas well.

[0047] The mixing and processing assembly 9 is sleeved on the rotating shaft 82. The power conversion assembly 8 converts the power of the material ejected from the gas well into the power to rotate the mixing and processing assembly 9, and uses the mixing and processing assembly 9 to filter and separate the gas, liquid and other substances carried by the foam ejected from the gas well. The mixing and processing assembly 9 includes a plurality of stirring plates 91, which are sequentially installed in the radial direction of the rotating shaft 82. The radial end of the rotating shaft 82 is sleeved with a connecting bearing 95, which is connected to the filter screen 92; the filter screen 92 is installed with a plurality of first springs 93 on the side away from the stirring plates 91. Figure 9 As shown, one end of multiple first springs 93 away from the filter screen 92 is fixedly connected to the inner side wall of the collection and processing shell 51; the side of the filter screen 92 away from the rotating shaft 82 is connected to the annular elastic band 94, and the annular elastic band 94 is connected to the inner side wall of the collection and processing shell 51.

[0048] An anti-blocking assembly 10 is disposed within the stirring plate 91 closest to the filter 92 to prevent clogging of the filter 92. The anti-blocking assembly 10 includes a mounting plate 101. An anti-blocking brush 102 is mounted on one side of the mounting plate 101 near the filter 92. A plurality of connecting posts 103 are connected to the other side of the mounting plate 101. A connecting plate 104 is disposed on the end of the connecting posts 103 away from the mounting plate 101. A plurality of second springs 105 are mounted on the side of the connecting plate 104 away from the connecting posts 103. The second springs 105 are mounted on the sidewall of the inner cavity of the filter 92.

[0049] like Figure 6 and Figure 7 As shown, a vibration component 11 is provided at the outer edge of the anti-blocking brush 102 away from the filter screen 92. The vibration component 11 includes a special-shaped ring 111. The special-shaped ring 111 is fixedly connected to the inner cavity side wall of the collection and processing shell 51 through multiple mounting columns 112. The special-shaped ring 111 is rotatably connected to a plurality of rotating balls 113 on the side close to the mounting plate 101. The rotating balls 113 are in contact with the mounting plate 101. The vibration component 11 is used to drive the filter screen 92 to vibrate, thereby improving the filtering ability and anti-blocking ability of the filter screen 92.

[0050] like Figure 8As shown, one side of the mounting plate 101 is rotatably connected to the central shaft 114, which is mounted on the surface of the rotating shaft 82. When the mounting plate 101 rotates, the shaped ring 111 and the rotating ball 113 cause the mounting plate 101 to rotate back and forth around the central shaft 114. At this time, the filter screen 92 is vibrated by the first spring 93 and the second spring 105, thereby improving the filtering ability and anti-clogging ability of the filter screen 92.

[0051] Example 4

[0052] like Figure 12 As shown, the second filling assembly 12 includes a second air pump 121, which is mounted on top of the foaming agent storage tank 21. The outlet of the second air pump 121 is connected to a connecting pipe 122, the end of which, away from the second air pump 121, is connected to an inflation airbag 123. An anti-sealing plate 124 is mounted on the inner side of the foaming agent filling pipe 22, near the foaming agent filling pipe 22. Multiple dividing bars 125 are fixed to the side of the anti-sealing plate 124 away from the foaming agent filling pipe 22. Anti-sealing openings 126 are defined between adjacent dividing bars 125. The second filling assembly 12 is used to inflate the foaming agent storage tank 21 to control the filling rate of the foaming agent.

[0053] The working principle of the foam drainage and gas production device for oil field production gas wells of the present invention is to use a balanced filling mechanism to add the foaming agent in the foaming agent storage box 21 into the gas production well. At this time, the first filling component 3 or the second filling component 12 is used to add gas to the foaming agent storage box 21, and the foaming agent in the foaming agent storage box 21 is pressurized to add the foaming agent into the gas injection well. At this time, the filling speed of the foaming agent can be controlled by controlling the gas filling speed of the first filling component 3 or the second filling component 12, and the speed at which the foaming agent flows into the bottom of the well can be controlled, so that the foaming agent is evenly in contact with the bottom well material, thereby realizing continuous filling of the foaming agent.

[0054] The foaming agent in the foaming agent storage box 21 is added to the gas production well. At this time, the first filling component 3 or the second filling component 12 is used to add gas to the foaming agent storage box 21, and the foaming agent in the foaming agent storage box 21 is pressurized to add the foaming agent to the gas injection well. At this time, the filling speed of the foaming agent is controlled by controlling the gas filling speed of the first filling component 3 or the second filling component 12, and the speed at which the foaming agent flows into the bottom of the well is controlled, so that the foaming agent is evenly in contact with the bottom material, thereby realizing continuous filling of the foaming agent. During use, the second air pump 121 and the connecting tube 122 are used to add air to the expansion airbag 123, and the expansion airbag 123 is expanded by adding air, thereby compressing the space inside the foaming agent storage box 21, and pressing the foaming agent in the foaming agent storage box 21 into the air injection well through the foaming agent filling pipe 22. At this time, in order to prevent the expansion airbag 123 from sealing the foaming agent filling pipe 22, an anti-sealing plate 124, a partition strip 125 and an anti-sealing port 126 are provided to prevent the expansion airbag 123 from sealing the foaming agent filling pipe 22 and affecting the filling of the foaming agent.

[0055] The backflow prevention assembly 7 prevents gas and liquid ejected from the gas well from flowing back into the gas well. When the power ejected from the gas well drives the rotating shaft 82 to rotate, the rotating shaft 82 can also drive the ratchet 71 to rotate. At this time, under the action of the ratchet teeth 72, the ratchet 71 will not rotate in the opposite direction, thus preventing the gas and liquid in the collection and processing housing 51 from flowing back into the gas well.

[0056] The working process of the foam drainage and gas production device for oil field gas wells of the present invention is as follows: when in use, the first air pump 31 is used to fill gas into the foaming agent storage box 21. At this time, the gas extends the elastic sealing piece 32, so that the elastic sealing piece 32 squeezes the foaming agent, and then the foaming agent filling pipe 22 is used to uniformly add the foaming agent into the gas production well.

[0057] When the foaming agent is added to the bottom of the gas injection well, the accumulated water at the bottom of the well contacts the foaming agent and, with the help of the stirring of the natural gas flow, a large amount of low-density water-containing foam is generated. The foam is carried from the bottom of the well to the ground with the air flow. When the natural gas carrying the bubble flow rises to the gas injection wellhead, it is added to the collection and processing shell 51 through the gas-liquid collection pipe 52. At this time, the power of the blowout drives the rotating plate 83 to rotate, thereby driving the rotating shaft 82 to rotate. The rotating shaft 82 can drive the stirring plate 91 to rotate. The stirring plate 91 is used to mix the defoaming agent and natural gas mixture to increase the defoaming rate. The mixture is then filtered by the rotating shaft 82 and discharged from the collection and processing shell 51 through the exhaust pipe 53 and the drain pipe 54 respectively.

Claims

1. Foam drainage and gas production device for oil field production gas wells, characterized by: The invention comprises a support frame (1), a plurality of moving wheels (13) are installed at the bottom of the support frame (1), a foaming agent storage component (2) is arranged on one side of the support frame (1), a collecting and processing outer frame (5) is arranged on the other side of the support frame (13), a balancing filling mechanism is arranged on the foaming agent storage component (2), and a defoaming agent storage box (6) is arranged on the top of the collecting and processing outer frame (5); the foaming agent storage component (2) and the collecting and processing outer frame (5) are connected to a gas production well, and the collecting and processing outer frame (5) is used to collect gas and liquid carried by foam ejected from the gas production well, and to process the gas and liquid before discharging them.

2. The foam drainage and gas production device for oilfield gas wells according to claim 1, characterized in that: The foaming agent storage assembly (2) comprises a foaming agent storage box (21) and a foaming agent filling pipe (22); the foaming agent storage box (21) is mounted on the top of the support frame (1); a pressure gauge (15) is mounted on the top of the foaming agent storage box (21); and the foaming agent filling pipe (22) is mounted inside the foaming agent storage box (21); The balanced filling mechanism comprises a first filling assembly (3), a second filling assembly (12) and an air pressure balancing assembly (4); the first filling assembly (3) and the air pressure balancing assembly (4) are respectively mounted on the top of the foaming agent storage box (21); the air pressure balancing assembly (4) is used to balance the air pressure in the foaming agent storage box (21); the air pressure balancing assembly (4) is connected to the defoaming agent storage box (6), and the defoaming agent storage box (6) is mounted on the top of the collection and processing outer frame (5); The first filling assembly (3) comprises a first air pump (31) and an elastic sealing sheet (32). The first air pump (31) is mounted on the top of the foaming agent storage box (21), and the elastic sealing sheet (32) is mounted on the side wall of the inner cavity of the foaming agent storage box (21). The first air pump (31) passes through the foaming agent storage box (21) and is connected to the elastic sealing sheet (32). A feeding pipe group (14) is mounted on the upper part of the foaming agent storage box (21), and the height of the portion of the feeding pipe group (14) extending to the inner cavity of the foaming agent storage box (21) is not higher than the height of the connection between the elastic sealing sheet (32) and the inner wall of the foaming agent storage box (21).

3. The foam drainage and gas production device for oilfield gas wells according to claim 2, characterized in that: The air pressure balancing assembly (4) comprises a balancing shell (41), which is mounted on one side of the top of the foaming agent storage box (21); an adjusting motor (42) is fixedly mounted on one side of the balancing shell (41); an output end of the adjusting motor (42) is horizontally fixedly connected to a threaded column (43); a surface of the threaded column (43) is threadedly connected to a moving plate (44); and a top of the moving plate (44) is vertically connected to a switching plate (45); an elastic separation strip (48) is arranged in the inner cavity of the balancing shell (41); the elastic separation strip (48) is arranged parallel to the threaded column (43), the elastic separation strip (48) is located on both sides of the threaded column (43), and the elastic separation strip (48) is slidably connected to the switching plate (45); a limiting strip (49) is mounted on the inner wall of the balancing shell (41), and the limiting strip (49) is slidably connected to the side of the switching plate (45).

4. The foam drainage and gas production device for oilfield gas wells according to claim 3, characterized in that: A movable discharge port is provided at the center of the switching plate (45), and two symmetrically distributed fixed discharge ports are provided on the top of the balancing shell (41). Both the movable discharge port and the fixed discharge port are circular, and the distance between the two fixed discharge ports is greater than the diameter of the movable discharge port. A deflation valve pipe (46) is installed at one of the fixed discharge ports, and the deflation valve pipe (46) is connected to the foaming agent storage box (21); a connecting valve pipe (47) is installed at the other fixed discharge port, and the end of the connecting valve pipe (47) away from the balancing shell (41) is connected to one side of the defoaming agent storage box (6).

5. The foam drainage and gas production device for oilfield gas wells according to claim 4, characterized in that: The collecting and processing outer frame (5) comprises a collecting and processing shell (51), which is mounted on the top of the supporting frame (1). A gas-liquid collecting pipe (52) is provided inside the collecting and processing shell (51), and the end of the gas-liquid collecting pipe (52) is connected to a gas production well; an exhaust pipe (53) and a liquid discharge pipe (54) are installed inside the collecting and processing shell (51) on a side away from the foaming agent storage box (21), and the exhaust pipe (53) is located above the liquid discharge pipe (54).

6. The foam drainage and gas production device for oilfield gas wells according to claim 5, characterized in that: A power conversion assembly (8) is arranged inside the collection and processing outer frame (5), and the power conversion assembly (8) includes a mounting shell (81), and the mounting shell (81) is connected to the inner cavity side wall of the collection and processing shell (51) through a plurality of fixing columns (84); a rotating shaft (82) is horizontally provided through the two side surfaces inside the mounting shell (81), and the two ends of the rotating shaft (82) are respectively rotatably connected to the inner cavity side wall of the collection and processing shell (51); the rotating shaft (82) is radially sleeved with a plurality of rotating plates (83), and the plurality of rotating plates (83) are all located inside the mounting shell (81); the gas-liquid collection pipe (52) is connected to the mounting shell (81), and the mounting shell (81) is installed at one end of the gas-liquid collection pipe (52) away from the gas production well.

7. The foam drainage and gas production device for oilfield gas wells according to claim 6, characterized in that: An anti-backflow assembly (7) is installed at one end of the rotating shaft (82), and the anti-backflow assembly (7) comprises a ratchet (71) and ratchet teeth (72). The ratchet (71) is installed on the surface of the rotating shaft (82), and the ratchet teeth (72) are arranged on the side of the ratchet (71). The ratchet teeth (72) are installed on the side wall of the inner cavity of the collection and processing shell (51).

8. The foam drainage and gas production device for oilfield gas wells according to claim 7, characterized in that: The mixing and processing component (9) is sleeved on the rotating shaft (82), and the mixing and processing component (9) includes a plurality of stirring plates (91), which are sequentially installed in the radial direction of the rotating shaft (82), and a connecting bearing (95) is sleeved on the radial end of the rotating shaft (82), and the connecting bearing (95) is connected to the filter screen (92); a plurality of first springs (93) are installed on the side of the filter screen (92) away from the stirring plates (91), and one end of the plurality of first springs (93) away from the filter screen (92) is fixedly connected to the inner cavity side wall of the collection and processing shell (51); a ring-shaped elastic band (94) is connected to the inner cavity side wall of the collection and processing shell (51) on the side of the filter screen (92) away from the rotating shaft (82), and the ring-shaped elastic band (94) is connected to the inner cavity side wall of the collection and processing shell (51).

9. The foam drainage and gas production device for oilfield gas wells according to claim 8, characterized in that: An anti-blocking assembly (10) is provided in the stirring plate (91) closest to the filter (92), and the anti-blocking assembly (100) comprises a mounting plate (101), an anti-blocking brush (102) is installed on one side of the mounting plate (101) close to the filter (92), a plurality of connecting columns (103) are connected to the other side of the mounting plate (101), a connecting plate (104) is provided on one end of the connecting column (103) away from the mounting plate (101), a plurality of second springs (105) are installed on one side of the connecting plate (104) away from the connecting column (103), and the second springs (105) are installed on the side wall of the inner cavity of the filter (92); A vibration assembly (11) is provided at the outer edge of the anti-blocking brush (102) away from the filter screen (92). The vibration assembly (111) comprises a special-shaped ring (111). The special-shaped ring (111) is fixedly connected to the inner cavity side wall of the collection and processing shell (51) through a plurality of mounting columns (112). A side of the special-shaped ring (111) close to the mounting plate (101) is rotatably connected to a plurality of rotating balls (113), and the rotating balls (113) are in contact with the mounting plate (101); one side of the mounting plate (101) is rotatably connected to a central shaft (114), and the central shaft (114) is mounted on the surface of the rotating shaft (82).

10. The foam drainage and gas production device for oilfield gas wells according to claim 9, characterized in that: The second filling assembly (12) includes a second air pump (121), which is installed on the top of the foaming agent storage box (21), and the outlet end of the second air pump (121) is connected to the connecting pipe (122), and the end of the connecting pipe (122) away from the second air pump (121) is connected to the expansion airbag (123); an anti-sealing plate (124) is installed on the inner side of the foaming agent filling pipe (22) near the foaming agent filling pipe (22), and a plurality of partition strips (125) are fixedly connected to the side of the anti-sealing plate (124) away from the foaming agent filling pipe (22), and an anti-sealing opening (126) is opened at the position of two adjacent partition strips (125).

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