Online monitoring type well fluid filtration device

Abstract

The present invention discloses an online monitoring type well fluid filter device, which relates to the field of well fluid filtration technology. The online monitoring type well fluid filter device comprises a mounting plate, a filtering mechanism is provided on the top of the mounting plate, a water tank is fixedly installed on the top of the mounting plate, the water tank and the filtering mechanism are connected via a liquid outlet pipe, a bottom plate is fixedly installed on the bottom of the mounting plate via four sets of support legs, a motor is fixedly installed on the top of the bottom plate, a rotating shaft is installed on the output end of the motor, rotating rods 1, 2 and 3 are rotatably installed on the top of the bottom plate, and the rotating shaft is connected to the rotating rods 1, 2 and 3 via a transmission mechanism. The present invention helps to release impurities adsorbed thereon, and at the same time, by rotating the filter material, the speed at which water flows through the filter material can be accelerated, saving overall filtration time and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of well fluid filtration, in particular to an online monitoring type well fluid filtration device. Background Art

[0002] In oil and gas drilling operations, the filtration properties of downhole operating fluids (or "fluids") have a critical impact on drilling efficiency and wellbore stability. Fluids primarily cool the drill bit, remove bottomhole debris, balance formation pressure, protect the wellbore, and prevent formation contamination. While the composition and properties of fluids vary depending on operating conditions and formation characteristics, their filtration properties are a crucial factor influencing wellbore stability, drilling rate, and operational efficiency.

[0003] The existing Chinese patent publication number is CN110585777B, and its name is a petroleum drilling fluid filtering device. The background technology of this patent clearly states that "however, current drilling fluids require filtration of multiple purities. The filtering devices in the existing technology can only filter the drilling fluid thoroughly once or multiple times, and cannot filter the drilling fluid in grades." It also uses corresponding patented technical means to solve this problem.

[0004] However, in this technology, the drilling fluid is only filtered through multi-stage overflow holes and filter chambers. When the overflow holes are blocked by large particles of impurities in the drilling fluid, the large particles of impurities cannot be released in a timely and effective manner, which easily causes the overflow holes to be blocked. At the same time, it takes a long time to complete the filtration of the drilling fluid by filtering it through the overflow holes, and the filtration efficiency is low. Therefore, we propose an online monitoring type well fluid filtration device to solve the above problems. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides an online monitoring type well fluid filtration device, which solves the problem that large particles of impurities cannot be released in a timely and effective manner, which easily causes the overflow hole to be blocked. At the same time, the drilling fluid itself is filtered through the overflow hole, which takes a long time to complete the filtration of the drilling fluid and has low filtration efficiency.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an online monitoring type well fluid filtering device includes a mounting plate, a filtering mechanism is provided on the top of the mounting plate, a water tank is fixedly installed on the top of the mounting plate, the water tank and the filtering mechanism are connected by a liquid outlet pipe, and a base plate is fixedly installed on the bottom of the mounting plate through four groups of supporting legs; a motor is fixedly installed on the top of the base plate, a rotating shaft is installed on the output end of the motor, and rotating rods 1, 2 and 3 are rotatably installed on the top of the base plate, and the rotating shaft is connected to the rotating rods 1, 2 and 3 through a transmission mechanism; a turbidity detector is fixedly installed on the water tank, a turbidity meter display electrically connected to the turbidity detector is fixedly installed on the top of the mounting plate, and a controller electrically connected to the turbidity meter is fixedly installed on the top of the water tank.

[0007] Furthermore, the filtering mechanism includes filter tank one, filter tank two and filter tank three fixedly mounted on the top of the mounting plate, and the tops of the filter tanks one, two and three are all connected with tank covers by threads; the interiors of the filter tanks one, two and three are all provided with filter boxes, the filter box in the filter tank one is provided with a first-level filter block, the filter box in the filter tank two is provided with a second-level filter block, and the filter box in the filter tank three is provided with a third-level filter block.

[0008] Furthermore, a liquid inlet pipe is installed on the filter tank one, the filter tank two is connected to the water storage tank through a liquid outlet pipe, the filter tank one and the filter tank two are connected through a primary outlet pipe, the filter tank two and the filter tank three are connected through a secondary outlet pipe, and the filter tank three is connected to the liquid outlet pipe through a drain pipe; a self-priming pump connected to the liquid outlet pipe is provided in the water storage tank, and a water inlet pipe extending to the outside of the water storage tank is installed in the water storage tank through a submersible pump, and the liquid inlet pipe is connected to the water inlet pipe.

[0009] Furthermore, solenoid valve one and solenoid valve two are respectively provided on both sides of the water inlet pipe on the liquid inlet pipe, solenoid valve eight is provided on the first-level outlet pipe, solenoid valve three is provided on the second-level outlet pipe, solenoid valve four and solenoid valve five are respectively provided on both sides of the drain pipe on the liquid outlet pipe, solenoid valve six is ​​provided on the drain pipe, and solenoid valve seven is provided on the water inlet pipe.

[0010] The top of the filter cartridge is provided with a box cover, and the box cover is rotatably mounted on a movable rod, and one end of the movable rod is away from the filter cartridge and is fixedly connected to the can cover; a support ring is fixedly mounted in the box cover and cooperates with the box cover; two sets of cavities are symmetrically opened in the filter cartridge, and two sets of guide rods are fixedly mounted in the box cover, and a movable plate is movably sleeved on the guide rod, and the guide rod is sleeved with a spring three that is fixedly connected to the movable plate, and the spring three is symmetrically opened on the box cover between the movable plate and the inner wall of the filter cartridge. Two sets of slots are symmetrically opened on the box cover, and a spring two is fixedly mounted in the slot, and one end of the spring two is fixedly mounted on

[0011] Furthermore, the inner bottoms of the filter tanks one, two and three are respectively provided with magnetic couplers that cooperate with the rotating rod one, two and three, and the tops of the magnetic couplers are fixedly installed with driving rods, and the driving rods are provided with driving blocks, and the bottoms of the filter boxes are provided with driving grooves that cooperate with the driving blocks.

[0012] Furthermore, the transmission mechanism includes sprocket 1, sprocket 2, and sprocket 3 fixedly mounted on the rotating shaft, and sprocket 4, sprocket 5, and sprocket 6 are fixedly mounted on the rotating rod 1, rotating rod 2, and rotating rod 3 respectively. The sprocket 4 is connected to the sprocket 1 through chain 1, the sprocket 5 is connected to the sprocket 2 through chain 2, and the sprocket 6 is connected to the sprocket 3 through chain 3.

[0013] Furthermore, the filter tanks 1, 2 and 3 are all fixedly installed with mounting rings, the mounting rings are movably provided with a plurality of striking rods, the striking rods are each sleeved with a spring 1, the tops of the striking rods are all fixedly installed with striking blocks that cooperate with the spring 1, the spring 1 is provided between the striking block and the mounting ring, and the bottoms of the filter boxes are all fixedly installed with a plurality of pressure blocks that cooperate with the striking blocks.

[0014] Furthermore, a pressure gauge is fixedly installed on the tank cover, and the controller is controlled and connected to the solenoid valve one, solenoid valve two, solenoid valve three, solenoid valve four, solenoid valve five, solenoid valve six, solenoid valve seven, and solenoid valve eight respectively.

[0015] Furthermore, the turbidity detector evaluates the well fluid inside the water storage tank based on the turbidity detection index: if the turbidity detection index is qualified, the filtered well fluid is discharged through the water storage tank; if the turbidity detection index is unqualified, the well fluid in the water storage tank is filtered a second time;

[0016] The turbidity detection index acquisition method comprises: obtaining the turbidity, total organic carbon concentration and conductivity of the well fluid in the water storage tank by connecting a turbidity detector to a sensor, and performing standardization processing; obtaining the weight factors of the standardized turbidity, total organic carbon concentration and conductivity for the turbidity detection index by an objective weighting method, and calculating the turbidity detection index by a turbidity detection index formula, wherein the turbidity detection index formula is:

[0017] ;

[0018] Where, is the turbidity detection index, is the turbidity of the well fluid, for right The weight factor, is the total organic carbon concentration of the wellbore fluid, for right The weight factor, is the conductivity of the well fluid, for right The weight factor of .

[0019] The present invention has the following beneficial effects:

[0020] (1) This online monitoring type well fluid filtration device uses a motor to drive three groups of filter boxes to rotate, so that the surface of the filter material in the filter box is continuously washed and vibrated, which helps to release impurities adsorbed on it. At the same time, by rotating the filter material, the speed of water flowing through the filter material can be accelerated, saving the overall filtration time and improving work efficiency.

[0021] (2) The online monitoring type well fluid filtration device improves the filtration accuracy and efficiency through the multi-stage filtration process of filter tank 1, filter tank 2 and filter tank 3, so that the well fluid reaches a higher purification standard, reduces the disadvantage of single-stage filtration being susceptible to clogging, extends the life of the filter material, and adapts to the needs of different water quality changes.

[0022] (3) The online monitoring type well fluid filtration device automatically collects and processes water quality parameters through the turbidity detector, and automatically opens or closes the relevant solenoid valves under the instruction of the controller, realizing real-time monitoring and automatic control, reducing the time and error of manual detection, and monitoring the water quality in real time to ensure that the water quality after the well fluid is filtered meets the requirements; when the turbidity does not meet the standard, it automatically triggers the secondary filtration, further improving the reliability of the filtration effect.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the present invention from a first perspective;

[0025] Figure 2 This is a schematic diagram of the structure from a second viewing angle of the present invention;

[0026] Figure 3 This is a schematic structural diagram of the present invention from a third viewing angle;

[0027] Figure 4 Schematic diagram of part of the structure of the present invention Figure 1 (Filter tank - cutaway view);

[0028] Figure 5 Schematic diagram of part of the structure of the present invention Figure 2 (Filter tank - cutaway view);

[0029] Figure 6 Schematic diagram of part of the structure of the present invention Figure 3 (Section view of filter tank II);

[0030] Figure 7 is a cross-sectional view of the filter tank 3 of the present invention;

[0031] Figure 8 For the present invention Figure 5 A magnified view of position A in the middle;

[0032] Figure 9 Schematic diagram of part of the structure of the present invention Figure 4 ;

[0033] Figure 10 Schematic diagram of part of the structure of the present invention Figure 5 ;

[0034] Figure 11 Schematic diagram of part of the structure of the present invention Figure 6 .

[0035] In the figure, 1. mounting plate; 2. water storage tank; 3. water inlet pipe; 4. bottom plate; 5. motor; 6. rotating shaft; 7. rotating rod 1; 8. rotating rod 2; 9. rotating rod 3; 10. filter tank 1; 11. filter tank 2; 12. filter tank 3; 13. tank cover; 14. liquid inlet pipe; 15. liquid outlet pipe; 16. primary outlet pipe; 17. secondary outlet pipe; 18. drain pipe; 19. solenoid valve 1; 20. solenoid valve 2; 21. solenoid valve 3; 22. solenoid valve 4; 23. solenoid valve 5; 24. solenoid valve 6; 25. solenoid valve 7; 26. solenoid valve 8; 27. filter box; 28. movable rod; 29. ​​primary filter block; 30. secondary filter block; 31. Filter block; 32. Magnetic coupler; 33. Drive rod; 34. Drive block; 35. Drive slot; 36. Sprocket one; 37. Sprocket two; 38. Sprocket three; 39. Sprocket four; 40. Sprocket five; 41. Sprocket six; 42. Chain one; 43. Chain two; 44. Chain three; 45. Pressure gauge; 46. Turbidity detector; 47. Turbidity meter display; 48. Controller; 49. Striking rod; 50. Striking block; 51. Pressure block; 52. Spring one; 53. Box cover; 54. Support ring; 55. Guide rod; 56. Moving plate; 57. Spring two; 58. Latch; 59. Slot; 60. Latch; 61. Movable plate; 62. Spring three. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] See also Figures 1-11 The embodiment of the present invention provides a technical solution: an online monitoring type well fluid filtering device, including a mounting plate 1, a filtering mechanism is provided on the top of the mounting plate 1, a water storage tank 2 is fixedly installed on the top of the mounting plate 1, the water storage tank 2 and the filtering mechanism are connected by a liquid outlet pipe 15, and a bottom plate 4 is fixedly installed on the bottom of the mounting plate 1 through four groups of supporting legs.

[0039] A motor 5 is fixedly installed on the top of the base plate 4, and a rotating shaft 6 is installed on the output end of the motor 5. A rotating rod 1 7, a rotating rod 2 8, and a rotating rod 3 9 are rotatably installed on the top of the base plate 4. The rotating shaft 6 is connected to the rotating rod 1 7, the rotating rod 2 8, and the rotating rod 3 9 through a transmission mechanism.

[0040] A turbidity detector 46 is fixedly mounted on the water tank 2 , a turbidity meter display 47 electrically connected to the turbidity detector 46 is fixedly mounted on the top of the mounting plate 1 , and a controller 48 electrically connected to the turbidity meter is fixedly mounted on the top of the water tank 2 .

[0041] The turbidity detector 46 evaluates the well fluid inside the water tank 2 based on the turbidity detection index: if the turbidity detection index is qualified, the well fluid after filtration is discharged through the water tank 2; if the turbidity detection index is unqualified, the well fluid in the water tank 2 is filtered a second time.

[0042] The filtering mechanism includes a filter tank 10, a filter tank 2 11 and a filter tank 3 12 fixedly mounted on the top of the mounting plate 1. The tops of the filter tanks 10, 11 and 12 are all connected with tank covers 13 through threads.

[0043] The interiors of filter tank 10, filter tank 2 11 and filter tank 3 12 are all provided with filter boxes 27. The filter box 27 in filter tank 10 is provided with a first-level filter block 29, the filter box 27 in filter tank 2 11 is provided with a second-level filter block 30, and the filter box 27 in filter tank 3 12 is provided with a third-level filter block 31.

[0044] A liquid inlet pipe 14 is installed on the filter tank 10, the filter tank 2 11 is connected to the water tank 2 through a liquid outlet pipe 15, the filter tank 10 and the filter tank 2 11 are connected through a primary outlet pipe 16, the filter tank 2 11 and the filter tank 3 12 are connected through a secondary outlet pipe 17, and the filter tank 3 12 is connected to the liquid outlet pipe 15 through a drain pipe 18.

[0045] A self-priming pump connected to the liquid outlet pipe 15 is provided in the water tank 2. A water inlet pipe 3 extending to the outside of the water tank 2 is installed in the water tank 2 through a submersible pump. The liquid inlet pipe 14 is connected to the water inlet pipe 3.

[0046] On the liquid inlet pipe 14, solenoid valve one 19 and solenoid valve two 20 are respectively provided on both sides of the water inlet pipe 3, on the first-level outlet pipe 16, solenoid valve eight 26 is provided, on the second-level outlet pipe 17, solenoid valve three 21 is provided, on the liquid outlet pipe 15, solenoid valve four 22 and solenoid valve five 23 are respectively provided on both sides of the drain pipe 18, on the drain pipe 18, solenoid valve six 24 is provided, and on the water inlet pipe 3, solenoid valve seven 25 is provided.

[0047] A box cover 53 is provided on the top of the filter box 27 , and a movable rod 28 is rotatably mounted on the box cover 53 . One end of the movable rod 28 away from the filter box 27 is fixedly connected to the tank cover 13 .

[0048] A support ring 54 that cooperates with the box cover 53 is fixedly installed in the filter box 27, and two groups of cavities are symmetrically opened in the filter box 27. Two groups of guide rods 55 are fixedly installed in the cavities. A movable plate 56 is movably sleeved on the guide rod 55, and a spring three 62 fixedly connected to the movable plate 56 is sleeved on the guide rod 55. The spring three 62 is located between the movable plate 56 and the inner wall of the filter box 27, and two groups of slots are symmetrically opened on the box cover 53. Spring two 57 is fixedly installed in the slots, and a movable plate 61 is fixedly installed at one end of the spring two 57.

[0049] One side of the movable plate 56 is fixedly installed with a pin 58 that extends to the outside of the filter box 27 and cooperates with the slot. The inner circles of the filter tank 1 10, the filter tank 2 11 and the filter tank 3 12 are all provided with a slot 59. The other side of the movable plate 56 is fixedly installed with a pin 60 that extends to the outside of the filter box 27 and cooperates with the slot 59.

[0050] Specifically, the solenoid valve 19, the solenoid valve 20, the solenoid valve 8 26, the solenoid valve 4 22, and the solenoid valve 5 23 are opened by the controller 48, and then the well fluid is added through the liquid inlet pipe 14. The well fluid enters the filter tank 10 through the liquid inlet pipe 14, and is filtered by the first-level filter block 29 in the filter tank 10. After the filtration is completed, the well fluid enters the filter tank 2 11 through the first-level outlet pipe 16, and then passes through the second-level filter block 30 in the filter tank 2 11 to perform second-level filtration on the well fluid after the first-level filtration. After the second-level filtration is completed, the well fluid flows into the water storage tank 2 through the liquid outlet pipe 15.

[0051] If tertiary filtration is required, open solenoid valve three 21 and solenoid valve six 24, and close solenoid valve four 22. This allows the secondary-filtered influent to enter filter tank three 12 through secondary outlet pipe 17. Tertiary filter block 31 in filter tank three 12 then filters the secondary-filtered influent through drain pipe 18 and into outlet pipe 15, from which it enters water storage tank 2. The primary filter block 29 is made of QLEOSponge membrane filter bag, the secondary filter block 30 is made of microfiber high-efficiency filter cloth, and the tertiary filter block 31 is made of ultra-microporous titanium rod.

[0052] By controlling the opening and closing of the solenoid valve, the filtration path can be flexibly switched to achieve primary, secondary, or tertiary filtration. This setting dynamically selects the filtration step based on actual needs, helping to conserve resources and energy while also extending the service life of the filter elements. The step-by-step filtration structure gradually removes impurities from the wellbore fluid through filter bags of varying precision and ultra-microporous titanium rods, ensuring that the wellbore fluid is cleaner after each stage of filtration.

[0053] When the filter material in the filter box 27 needs to be replaced, it is only necessary to pull the tank cover 13 upwards. The tank cover 13 drives the box cover 53 to rise through the movable rod 28. The box cover 53 drives the filter box 27 to rise through the action of the slot and the latch 58. When the filter box 27 rises to the position where the latch 60 cooperates with the slot 59, the elastic force provided by the spring 2 57 will drive the latch 58 to move through the movable plate 61, so that the latch 58 is removed from the slot. When the latch 58 is out of contact with the movable plate 61, the maximum stroke of the movable plate 61 is flush with the slot, so that the box cover 53 can be removed from the filter box 27, making it convenient to replace the filter material in the filter box 27.

[0054] When the latch 58 is removed from the slot, the latch 58 drives the latch 60 to move through the movable plate 56, thereby moving the latch 60 into the slot 59. The elastic force provided by the spring three 62 fixes the latch 60 in the slot 59, thereby fixing the position of the filter box 27 and preventing the filter box 27 from falling into the filter tank.

[0055] When the filter material is replaced, the box cover 53 is placed on the filter box 27, and then the box cover 53 is pressed. The box cover 53 drives the filter box 27 to move downward through the support ring 54, and then drives the latch 60 to move out of the slot 59. When the latch 60 moves out, it will drive the latch 58 to move through the movable plate 56, so that the latch 58 moves into the slot, thereby fixing the position of the box cover 53. This progressive filtering method greatly reduces the pressure of subsequent processes, improves the quality of the filtered liquid, and reduces the risk of contamination. At the same time, when replacing the filter material, the box cover 53 can be disassembled in the process of taking out the filter box 27. There is no need to spend extra time to disassemble the box cover 53, which improves work efficiency.

[0056] In this embodiment, the bottom of the filter tank 10, the filter tank 2 11 and the filter tank 3 12 are respectively provided with a magnetic coupler 32 that cooperates with the rotating rod 1 7, the rotating rod 2 8 and the rotating rod 3 9. The top of the magnetic coupler 32 is fixedly installed with a driving rod 33, and the driving rod 33 is provided with a driving block 34. The bottom of the filter box 27 is provided with a driving groove 35 that cooperates with the driving block 34.

[0057] The transmission mechanism includes sprocket 1 36, sprocket 2 37, and sprocket 3 38 fixedly mounted on the rotating shaft 6, and sprocket 4 39, sprocket 5 40, and sprocket 6 41 fixedly mounted on the rotating rod 1 7, rotating rod 2 8, and rotating rod 3 9 respectively. Sprocket 4 39 is connected to sprocket 1 36 by chain 1 42, sprocket 5 40 is connected to sprocket 2 37 by chain 2 43, and sprocket 6 41 is connected to sprocket 3 38 by chain 3 44.

[0058] Specifically, start the motor 5, and the motor 5 drives the rotating shaft 6 to rotate, and the rotating shaft 6 drives the sprocket 1 36, sprocket 2 37, and sprocket 3 38 to rotate. The sprocket 1 36, sprocket 2 37, and sprocket 3 38 respectively drive the sprocket 4 39, sprocket 5 40, and sprocket 6 41 to rotate through the chain 1 42, chain 2 43, and chain 3 44, thereby driving the rotating rod 1 7, rotating rod 2 8, and rotating rod 3 9 to rotate. The rotating rod 1 7, rotating rod 2 8, and rotating rod 3 9 drive the driving rod 33 in the filter tank 1 10, filter tank 2 11, and filter tank 3 12 to rotate through the magnetic coupling 32. The driving rod 33 drives the filter box 27 to rotate through the driving block 34 and the driving slot 35, thereby driving the filter material in the filter box 27 to rotate.

[0059] The three groups of filter boxes 27 are driven to rotate by the motor 5, so that the surface of the filter material in the filter box 27 is continuously washed, which helps to release impurities adsorbed thereon, saves the overall filtration time, and improves work efficiency; when the filter material in the filter box 27 rotates, the well fluid flows tangentially to the surface of the filter material under the combined action of gravity and centrifugal force. The tangential flow process produces a continuous flushing effect on the surface of the filter material, which is equivalent to a dynamic washing, helping to peel off the particulate matter adsorbed on the surface of the filter material, thereby extending the service life of the filter material.

[0060] In another embodiment, Figure 9 As shown, filter tank 1 10, filter tank 2 11 and filter tank 3 12 are all fixedly installed with mounting rings, and a number of striking rods 49 are movably provided on the mounting rings, and a spring 1 52 is sleeved on the striking rod 49. A striking block 50 cooperating with the spring 1 52 is fixedly installed on the top of the striking rod 49, and the spring 1 52 is set between the striking block 50 and the mounting ring. A number of pressure blocks 51 cooperating with the striking block 50 are fixedly installed on the bottom of the filter box 27. When the filter box 27 rotates, the pressure block 51 at the bottom of the filter box 27 will be driven to rotate. When the pressure block 51 contacts the striking block 50, the striking block 50 will be squeezed, causing the striking block 50 to move downward and squeeze the spring 1 52. When the pressure block 51 continues to rotate and separates from the striking block 50, the elastic force provided by the spring 1 52 will drive the striking block 50 to move upward and knock on the bottom of the filter box 27, thereby causing the filter material in the filter box 27 to vibrate and prevent debris from clogging the filter material.

[0061] In this embodiment, a pressure gauge 45 is fixedly installed on the tank cover 13, and the controller 48 is controlled and connected with solenoid valve 19, solenoid valve 20, solenoid valve 3 21, solenoid valve 4 22, solenoid valve 5 23, solenoid valve 6 24, solenoid valve 7 25, and solenoid valve 8 26.

[0062] Specifically, the filtered well fluid in the water tank 2 is tested by the turbidity detector 46. If the turbidity of the well fluid is qualified, the well fluid is discharged through the water tank 2. If the turbidity of the well fluid is unqualified, the solenoid valve 25 is opened and the solenoid valve 19 is closed by the controller 48, so that the well fluid in the water tank 2 enters the liquid inlet pipe 14 through the submersible pump and the water inlet pipe 3, and then enters the filter tank 10 through the liquid inlet pipe 14 for secondary filtration until the turbidity of the well fluid in the water tank 2 is qualified, and then the solenoid valve 25 is closed by the controller 48.

[0063] When the pressure displayed by the pressure gauge 45 is high, it indicates that the filter material is clogged. At this time, the well fluid in the water storage tank 2 is discharged from the water storage tank 2 to the liquid outlet pipe 15 through the self-priming pump in conjunction with the drainage pipe 18. Then, it flows back through the liquid outlet pipe 15 through the filter tank 3 12, the filter tank 2 11, and the filter tank 1 10 in sequence. The filter material in the filter box 27 is backwashed by the well fluid backflow process. After the backwash is completed, the solenoid valve 7 25 is opened again by the controller 48, and the solenoid valve 1 19 is closed, so that the well fluid in the water storage tank 2 enters the liquid inlet pipe 14 through the submersible pump in conjunction with the water inlet pipe 3, and then enters the filter tank 1 10 through the liquid inlet pipe 14 for filtration. If the turbidity of the well fluid after filtration is still not up to standard, it means that the filter material in the filter box 27 is damaged and needs to be replaced.

[0064] Turbidity detector 46 performs real-time testing on the filtered well fluid, ensuring that only qualified liquid exits water tank 2. If the turbidity level fails the test, controller 48 activates a secondary filtration channel, allowing the unqualified well fluid to re-enter inlet pipe 14 through the submersible pump and inlet pipe 3 for a second filtration process, thus achieving automated filtration multiple times until the turbidity level reaches acceptable levels. The entire system requires no human intervention, achieving automated control and intelligent judgment, enhancing operational convenience. This ensures effective filtration while preventing the discharge of unqualified liquid, saving energy and improving filtration stability and reliability.

[0065] In this embodiment, the turbidity detection index is obtained by connecting the turbidity detector 46 to the sensor to obtain the turbidity, total organic carbon concentration and conductivity of the well fluid in the water storage tank 2, and perform standardization processing; obtain the weight factors of the standardized turbidity, total organic carbon concentration and conductivity for the turbidity detection index by the objective weighting method, and calculate the turbidity detection index by the turbidity detection index formula. The turbidity detection index formula is:

[0066] ;

[0067] Where, is the turbidity detection index, is the turbidity of the well fluid, for right The weight factor, is the total organic carbon concentration of the wellbore fluid, for right The weight factor, is the conductivity of the well fluid, for right The weight factor of .

[0068] Specifically, the turbidity sensor, total organic carbon concentration sensor and conductivity sensor in the water tank 2 are connected through the turbidity detector 46 to obtain the turbidity, total organic carbon concentration and conductivity of the well fluid; =5, =0.4, =2, =0.3, =0.8, =0.3, we get =4.7026, The higher the value, the higher the turbidity of the well fluid and the substandard filtration results.

[0069] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0070] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An online monitoring type well fluid filtering device, comprising a mounting plate (1), a filtering mechanism being provided on the top of the mounting plate (1), characterized in that: A water storage tank (2) is fixedly mounted on the top of the mounting plate (1), the water storage tank (2) is connected to the filtering mechanism via a liquid outlet pipe (15), and a base plate (4) is fixedly mounted on the bottom of the mounting plate (1) via four sets of supporting legs; A motor (5) is fixedly mounted on the top of the base plate (4), a rotating shaft (6) is mounted on the output end of the motor (5), a rotating rod 1 (7), a rotating rod 2 (8), and a rotating rod 3 (9) are rotatably mounted on the top of the base plate (4), and the rotating shaft (6) is connected to the rotating rod 1 (7), the rotating rod 2 (8), and the rotating rod 3 (9) through a transmission mechanism; A turbidity detector (46) is fixedly mounted on the water storage tank (2), a turbidity meter display (47) electrically connected to the turbidity detector (46) is fixedly mounted on the top of the mounting plate (1), and a controller (48) electrically connected to the turbidity meter is fixedly mounted on the top of the water storage tank (2); The filtering mechanism comprises a filter tank 1 (10), a filter tank 2 (11) and a filter tank 3 (12) fixedly mounted on the top of the mounting plate (1), and the tops of the filter tank 1 (10), the filter tank 2 (11) and the filter tank 3 (12) are all connected to tank covers (13) via threads; The filter tank one (10), the filter tank two (11) and the filter tank three (12) are all provided with a filter box (27), the filter box (27) in the filter tank one (10) is provided with a primary filter block (29), the filter box (27) in the filter tank two (11) is provided with a secondary filter block (30), and the filter box (27) in the filter tank three (12) is provided with a tertiary filter block (31); The top of each filter box (27) is provided with a box cover (53), and a movable rod (28) is rotatably mounted on each box cover (53), and one end of the movable rod (28) away from the filter box (27) is fixedly connected to the tank cover (13); A support ring (54) that cooperates with the box cover (53) is fixedly installed in the filter box (27), two groups of cavities are symmetrically opened in the filter box (27), two groups of guide rods (55) are fixedly installed in the cavities, a movable plate (56) is movably sleeved on the guide rods (55), and a spring three (62) fixedly connected to the movable plate (56) is sleeved on the guide rods (55), and the spring three (62) is located between the movable plate (56) and the inner wall of the filter box (27), and two groups of slots are symmetrically opened on the box cover (53), and a spring two (57) is fixedly installed in the slots, and a movable plate (61) is fixedly installed at one end of the spring two (57); A latch (58) extending to the outside of the filter box (27) and cooperating with the slot is fixedly mounted on one side of the movable plate (56); a card slot (59) is provided on the inner rings of the filter tank one (10), the filter tank two (11) and the filter tank three (12); and a card pin (60) extending to the outside of the filter box (27) and cooperating with the card slot (59) is fixedly mounted on the other side of the movable plate (56); The turbidity detector (46) evaluates the well fluid inside the water storage tank (2) based on the turbidity detection index: if the turbidity detection index is qualified, the well fluid after filtration is discharged through the water storage tank (2); if the turbidity detection index is unqualified, the well fluid in the water storage tank (2) is filtered twice; The turbidity detection index acquisition method is: The turbidity, total organic carbon concentration and conductivity of the well fluid in the water storage tank (2) are obtained by connecting the turbidity detector (46) to the sensor and then standardized; The weight factors of the standardized turbidity, total organic carbon concentration and conductivity for the turbidity detection index are obtained by the objective weighting method, and the turbidity detection index is calculated by the turbidity detection index formula. The turbidity detection index formula is: Where, is the turbidity detection index, is the turbidity of the well fluid, for right The weight factor, is the total organic carbon concentration of the wellbore fluid, for right The weight factor, is the conductivity of the well fluid, for right The weight factor of .

2. The online monitoring type well fluid filtering device according to claim 1, characterized in that: The filter tank 1 (10) is connected to a liquid inlet pipe (14), the filter tank 2 (11) is connected to the water storage tank (2) via a liquid outlet pipe (15), the filter tank 1 (10) is connected to the filter tank 2 (11) via a primary outlet pipe (16), the filter tank 2 (11) is connected to the filter tank 3 (12) via a secondary outlet pipe (17), and the filter tank 3 (12) is connected to the liquid outlet pipe (15) via a drain pipe (18); A self-priming pump connected to the liquid outlet pipe (15) is provided in the water storage tank (2); a water inlet pipe (3) extending to the outside of the water storage tank (2) is installed in the water storage tank (2) via a submersible pump; the liquid inlet pipe (14) is in communication with the water inlet pipe (3).

3. The online monitoring type well fluid filtering device according to claim 2, characterized in that: The liquid inlet pipe (14) is provided with a solenoid valve 1 (19) and a solenoid valve 2 (20) on both sides of the water inlet pipe (3), the first-level outlet pipe (16) is provided with a solenoid valve 8 (26), the second-level outlet pipe (17) is provided with a solenoid valve 3 (21), the liquid outlet pipe (15) is provided with a solenoid valve 4 (22) and a solenoid valve 5 (23) on both sides of the drain pipe (18), the drain pipe (18) is provided with a solenoid valve 6 (24), and the water inlet pipe (3) is provided with a solenoid valve 7 (25).

4. The online monitoring type well fluid filtering device according to claim 1, characterized in that: The bottoms of the filter tanks 1 (10), 2 (11) and 3 (12) are respectively provided with magnetic couplers (32) that cooperate with the rotating rod 1 (7), 2 (8) and 3 (9), and the tops of the magnetic couplers (32) are fixedly mounted with drive rods (33), and the drive rods (33) are provided with drive blocks (34). The bottoms of the filter boxes (27) are provided with drive slots (35) that cooperate with the drive blocks (34).

5. The online monitoring type well fluid filtering device according to claim 4, characterized in that: The transmission mechanism comprises sprocket 1 (36), sprocket 2 (37), and sprocket 3 (38) fixedly mounted on the rotating shaft (6); sprocket 4 (39), sprocket 5 (40), and sprocket 6 (41) are fixedly mounted on the rotating rod 1 (7), the rotating rod 2 (8), and the rotating rod 3 (9), respectively; the sprocket 4 (39) is connected to the sprocket 1 (36) via chain 1 (42); the sprocket 5 (40) is connected to the sprocket 2 (37) via chain 2 (43); and the sprocket 6 (41) is connected to the sprocket 3 (38) via chain 3 (44).

6. The online monitoring type well fluid filtering device according to claim 5, characterized in that: The filter tank 1 (10), the filter tank 2 (11) and the filter tank 3 (12) are all fixedly installed with mounting rings, and the mounting rings are all movably provided with a plurality of striking rods (49), and the striking rods (49) are all sleeved with springs 1 (52). The tops of the striking rods (49) are all fixedly installed with striking blocks (50) that cooperate with the spring 1 (52), and the spring 1 (52) is arranged between the striking blocks (50) and the mounting rings. The bottoms of the filter boxes (27) are all fixedly installed with a plurality of pressure blocks (51) that cooperate with the striking blocks (50).

7. The online monitoring type well fluid filtering device according to claim 3, characterized in that: A pressure gauge (45) is fixedly mounted on the tank cover (13), and the controller (48) is controlled and connected to the solenoid valve 1 (19), solenoid valve 2 (20), solenoid valve 3 (21), solenoid valve 4 (22), solenoid valve 5 (23), solenoid valve 6 (24), solenoid valve 7 (25), and solenoid valve 8 (26), respectively.

Images