On-line monitoring type working fluid filtering device

Abstract

The invention discloses an online monitoring type working fluid filtering device, and relates to the technical field of working fluid filtering. The online monitoring type working fluid filtering device comprises a mounting plate, a filtering mechanism is arranged at the top of the mounting plate, a water storage tank is fixedly mounted at the top of the mounting plate, the water storage tank is connected with the filtering mechanism through a liquid outlet pipe, and a bottom plate is fixedly mounted at the bottom of the mounting plate through four sets of supporting legs; a motor is fixedly installed at the top of the bottom plate, a rotating shaft is installed at the output end of the motor, a first rotating rod, a second rotating rod and a third rotating rod are rotatably installed at the top of the bottom plate, and the rotating shaft is connected with the first rotating rod, the second rotating rod and the third rotating rod through a transmission mechanism. Impurities adsorbed on the filter material can be released easily, meanwhile, the speed of water flowing through the filter material can be increased by rotating the filter material, the overall filtering time is saved, and the working efficiency is improved.

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 projects, the filtration performance of downhole operating fluid (i.e. "well fluid") has a key impact on drilling efficiency and wellbore stability. The main functions of well fluid include cooling the drill bit, removing bottom debris, balancing formation pressure, protecting the well wall and preventing formation contamination. The composition and performance of well fluid vary depending on operating conditions and formation characteristics, but its filtration characteristics are an important factor affecting well wall stability, drilling speed and operating efficiency.

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

[0004] However, in this technology, the drilling fluid is filtered only 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 the drilling fluid itself 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 view of the shortcomings of the prior art, the present invention provides an online monitoring type drilling fluid filtering device, which solves the problem that large particle 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, and it takes a long time to complete the filtration of the drilling fluid, resulting in 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, comprising a mounting plate, a filtering mechanism is arranged on the top of the mounting plate, a water storage tank is fixedly mounted on the top of the mounting plate, the water storage tank and the filtering mechanism are connected by a liquid outlet pipe, and a base plate is fixedly mounted on the bottom of the mounting plate through four groups of supporting legs; a motor is fixedly mounted on the top of the base plate, a rotating shaft is mounted on the output end of the motor, rotating rods 1, 2 and 3 are rotatably mounted 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 mounted on the water storage tank, a turbidity meter display electrically connected to the turbidity detector is fixedly mounted on the top of the mounting plate, and a controller electrically connected to the turbidity meter is fixedly mounted on the top of the water storage tank.

[0007] Furthermore, the filtering mechanism includes filter tank 1, filter tank 2 and filter tank 3 fixedly mounted on the top of the mounting plate, and the tops of the filter tanks 1, 2 and 3 are all connected with tank covers by threads; the interiors of the filter tanks 1, 2 and 3 are all provided with filter boxes, the filter box in the filter tank 1 is provided with a primary filter block, the filter box in the filter tank 2 is provided with a secondary filter block, and the filter box in the filter tank 3 is provided with a tertiary 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 the liquid inlet pipe on both sides of the water 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 the liquid outlet pipe on both sides of the drain pipe, solenoid valve six is ​​provided on the drain pipe, and solenoid valve seven is provided on the water inlet pipe.

[0010] The filter cartridge of claim 1, wherein the filter cartridge has two guide rods, each of which is symmetrically mounted on the filter cartridge, and the guide rods are movably sleeved with a movable plate, each of which is sleeved with a spring three that is fixedly connected to the movable plate, the spring three being located between the movable plate and the inner wall of the filter cartridge. The filter cartridge has two guide rods, each of which is symmetrically mounted on the filter cartridge, the spring two being fixedly mounted in the slots, and a movable plate being fixedly mounted on one end of the spring two. A latch that extends to the outside of the filter cartridge and cooperates with the latch is fixedly mounted on one side of the movable plate, a card slot is provided on the inner rings of the filter tanks one, two and three, and a card pin that extends to the outside of the filter cartridge and cooperates with the card slot is fixedly mounted on the other side of the movable plate.

[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, the tops of the magnetic couplers are fixedly installed with driving rods, 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 one, sprocket two, and sprocket three fixedly mounted on the rotating shaft, and sprocket four, sprocket five, and sprocket six are fixedly mounted on the rotating rod one, rotating rod two, and rotating rod three, respectively; sprocket four is connected to sprocket one through chain one, sprocket five is connected to sprocket two through chain two, and sprocket six is ​​connected to sprocket three through chain three.

[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 sleeved with a spring 1, the tops of the striking rods are fixedly installed with striking blocks that cooperate with the spring 1, the spring 1 is arranged between the striking block and the mounting ring, and the bottoms of the filter boxes are 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 with 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 well fluid after filtration is discharged through the water storage tank; if the turbidity detection index is unqualified, the well fluid in the water storage tank is filtered twice; The method for obtaining the turbidity detection index is as follows: the turbidity, total organic carbon concentration and conductivity of the well fluid in the water tank are obtained by connecting the turbidity detector 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 an objective weighting method, and the turbidity detection index is calculated by a turbidity detection index formula, and the turbidity detection index formula is: ; In the formula, is the turbidity detection index, is the turbidity of the well fluid, for right The weight factor of is the total organic carbon concentration of the well fluid, for right The weight factor of is the conductivity of the well fluid, for right The weight factor of .

[0016] The present invention has the following beneficial effects: (1) The 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 at which water flows through the filter material can be accelerated, saving the overall filtration time and improving work efficiency.

[0017] (2) The online monitoring type well fluid filtration device improves the filtration accuracy and efficiency through the multi-stage filtration process of filter tank one, filter tank two and filter tank three, so that the well fluid reaches a higher purification standard, reduces the disadvantage of single-stage filtration being susceptible to clogging, prolongs the life of the filter material, and adapts to the needs of different water quality changes.

[0018] (3) The online monitoring type wellbore fluid filtration device automatically collects and processes water quality parameters through a turbidity detector, and automatically opens or closes related solenoid valves under the command 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 meets the requirements after wellbore fluid filtration; when the turbidity does not meet the standard, it automatically triggers secondary filtration, further improving the reliability of the filtration effect.

[0019] 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

[0020] Figure 1It is a schematic diagram of the structure of the present invention from a first viewing angle; Figure 2 It is a schematic diagram of the structure of the second viewing angle of the present invention; Figure 3 It is a schematic diagram of the structure from a third viewing angle of the present invention; Figure 4 It is a schematic diagram of the partial structure of the present invention Figure 1 (Filter tank - cutaway view); Figure 5 It is a schematic diagram of the partial structure of the present invention Figure 2 (Filter tank - cutaway view); Figure 6 It is a schematic diagram of the partial structure of the present invention Figure 3 (Sectional view of filter tank 2); Figure 7 It is a cross-sectional view of the filter tank 3 of the present invention; Figure 8 For the present invention Figure 5 A magnified view of position A in the middle; Fig. 9 It is a schematic diagram of the partial structure of the present invention Figure 4 ; Fig.10 It is a schematic diagram of the partial structure of the present invention Figure 5 ; Fig.11 It is a schematic diagram of the partial structure of the present invention Figure 6 .

[0021] 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, three stage 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, movable plate; 57, spring two; 58, latch; 59, slot; 60, latch; 61, movable plate; 62, spring three. DETAILED DESCRIPTION

[0022] 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.

[0023] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0024] See also Figure 1-Figure 11 The embodiment of the present invention provides a technical solution: an online monitoring type well fluid filtering device, comprising a mounting plate 1, a filtering mechanism is arranged 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 by four sets of supporting legs.

[0025] 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 with the rotating rod 1 7, the rotating rod 2 8, and the rotating rod 3 9 through a transmission mechanism.

[0026] 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 .

[0027] 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.

[0028] 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, and the tops of the filter tanks 10, 11 and 12 are all connected with tank covers 13 through threads.

[0029] The filter tank 1 10 , the filter tank 2 11 and the filter tank 3 12 are all provided with a filter box 27 . The filter box 27 in the filter tank 10 is provided with a primary filter block 29 , the filter box 27 in the filter tank 2 11 is provided with a secondary filter block 30 , and the filter box 27 in the filter tank 3 12 is provided with a tertiary filter block 31 .

[0030] 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 is connected to the filter tank 2 11 through a primary outlet pipe 16, the filter tank 2 11 is connected to the filter tank 3 12 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.

[0031] A self-priming pump connected to the liquid outlet pipe 15 is arranged 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 communicated with the water inlet pipe 3.

[0032] The liquid inlet pipe 14 is provided with a solenoid valve 19 and a solenoid valve 2 20 on both sides of the water inlet pipe 3, a solenoid valve 8 26 is provided on the first-level outlet pipe 16, a solenoid valve 3 21 is provided on the second-level outlet pipe 17, a solenoid valve 4 22 and a solenoid valve 5 23 are provided on both sides of the drain pipe 18 on the liquid outlet pipe 15, a solenoid valve 6 24 is provided on the drain pipe 18, and a solenoid valve 7 25 is provided on the water inlet pipe 3.

[0033] A box cover 53 is disposed 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 .

[0034] A support ring 54 cooperating 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, 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.

[0035] A latch 58 extending to the outside of the filter box 27 and cooperating with the slot is fixedly installed on one side of the movable plate 56, and a slot 59 is opened in the inner circle of the filter tank 1 10, the filter tank 2 11 and the filter tank 3 12. A latch pin 60 extending to the outside of the filter box 27 and cooperating with the slot 59 is fixedly installed on the other side of the movable plate 56.

[0036] 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 through 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 primary filter block 29 in the filter tank 10. After the filtration, the well fluid enters the filter tank 2 11 through the primary outlet pipe 16, and then the well fluid after the primary filtration is filtered by the secondary filter block 30 in the filter tank 2 11. After the secondary filtration, the well fluid flows into the water storage tank 2 through the liquid outlet pipe 15.

[0037] If three-stage filtration is required, open the electromagnetic valve three 21 and the electromagnetic valve six 24, and close the electromagnetic valve four 22, so that the well fluid after the two-stage filtration can enter the filter tank three 12 through the two-stage outlet pipe 17, and the well fluid after the two-stage filtration is subjected to three-stage filtration by the three-stage filter block 31 in the filter tank three 12. After the three-stage filtration, the well fluid enters the liquid outlet pipe 15 through the drain pipe 18, and then enters the water storage tank 2 through the liquid outlet pipe 15. The filter material of the first-stage filter block 29 is QLEOSponge (Ole'ao sponge) suction membrane filter bag, the filter material of the second-stage filter block 30 is ultra-fine fiber high-efficiency filter cloth, and the material of the third-stage filter block 31 is ultra-microporous titanium rod.

[0038] 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 steps according to actual needs, which helps save resources and energy and also prolongs the service life of the filter. The step-by-step filtration structure gradually removes impurities in the well fluid through filter bags of different precisions and ultra-microporous titanium rods, ensuring that the well fluid is cleaner after each stage of filtration.

[0039] 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 slot and the action of the latch 58. When the filter box 27 rises to the position where the latch 60 and the slot 59 cooperate, 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, which is convenient for replacing the filter material in the filter box 27.

[0040] 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 to prevent the filter box 27 from falling into the filter tank.

[0041] 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 drives 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, and there is no need to spend extra time to disassemble the box cover 53, thereby improving work efficiency.

[0042] 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 magnetic couplers 32 that cooperate with the rotating rod 1 7, the rotating rod 2 8 and the rotating rod 3 9, and 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, and the bottom of the filter box 27 is provided with a driving groove 35 that cooperates with the driving block 34.

[0043] The transmission mechanism includes sprocket one 36, sprocket two 37, and sprocket three 38 fixedly mounted on the rotating shaft 6, and sprocket four 39, sprocket five 40, and sprocket six 41 are fixedly mounted on the rotating rod one 7, rotating rod two 8, and rotating rod three 9 respectively. Sprocket four 39 is connected to sprocket one 36 through chain one 42, sprocket five 40 is connected to sprocket two 37 through chain two 43, and sprocket six 41 is connected to sprocket three 38 through chain three 44.

[0044] Specifically, the motor 5 is started, and the motor 5 drives the rotating shaft 6 to rotate, and the rotating shaft 6 drives the sprocket 1 36, the sprocket 2 37, and the sprocket 3 38 to rotate. The sprocket 1 36, the sprocket 2 37, and the sprocket 3 38 respectively drive the sprocket 4 39, the sprocket 5 40, and the sprocket 6 41 to rotate through the chain 1 42, the chain 2 43, and the chain 3 44, thereby driving the rotating rod 1 7, the rotating rod 2 8, and the rotating rod 3 9 to rotate. The rotating rod 1 7, the rotating rod 2 8, and the rotating rod 3 9 drive the driving rod 33 in the filter tank 1 10, the filter tank 2 11, and the 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.

[0045] 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 filtering time, and improves the working 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, which helps to peel off the particles adsorbed on the surface of the filter material, thereby extending the service life of the filter material.

[0046] In another embodiment, Fig. 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 plurality of striking rods 49 are movably provided on the mounting rings, and a spring 52 is sleeved on the striking rod 49. A striking block 50 cooperating with the spring 52 is fixedly installed on the top of the striking rod 49, and the spring 52 is arranged between the striking block 50 and the mounting ring, and a plurality 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.

[0047] In this embodiment, a pressure gauge 45 is fixedly installed on the tank cover 13, and a 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.

[0048] Specifically, the filtered well fluid in the water tank 2 is tested by a 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.

[0049] When the pressure displayed by the pressure gauge 45 is relatively high, it indicates that the filter material is clogged. At this time, the well-entering liquid 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 cooperation with the drainage pipe 18, and then refluxes through the filter tank three 12, the filter tank two 11, and the filter tank one 10 in sequence through the liquid outlet pipe 15. The filter material in the filter box 27 is backwashed through the well-entering liquid reflux process. After the backwashing is completed, the solenoid valve seven 25 is opened again through the controller 48, and the solenoid valve one 19 is closed, so that the well-entering liquid in the water storage tank 2 enters the liquid inlet pipe 14 through the submersible pump in cooperation with the water inlet pipe 3, and then enters the filter tank one 10 through the liquid inlet pipe 14 for filtration. If the turbidity of the well-entering liquid 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.

[0050] The filtered well fluid is tested in real time by the turbidity detector 46 to ensure that only qualified liquid can be discharged from the water storage tank 2. If the turbidity is unqualified, the controller 48 will open the secondary filtration channel, so that the unqualified well fluid re-enters the liquid inlet pipe 14 through the submersible pump and the water inlet pipe 3 for the second filtration process, thereby realizing multiple automated filtration processes until the turbidity is qualified. The entire system does not require manual intervention, realizes automated control and intelligent judgment, improves operational convenience, ensures the filtering effect while avoiding the discharge of unqualified liquid, saves energy consumption, and improves the stability and reliability of filtering.

[0051] In this embodiment, the method for obtaining the turbidity detection index is as follows: 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 an objective weighting method, and the turbidity detection index is calculated by the turbidity detection index formula, and the turbidity detection index formula is: ; In the formula, is the turbidity detection index, is the turbidity of the well fluid, for right The weight factor of is the total organic carbon concentration of the well fluid, for right The weight factor of is the conductivity of the well fluid, for right The weight factor of .

[0052] Specifically, the turbidity detector 46 is connected to the turbidity sensor, total organic carbon concentration sensor and conductivity sensor in the water storage tank 2 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 filtration result does not meet the standard.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. 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 arranged 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); the rotating shaft (6) is connected to the rotating rod 1 (7), the rotating rod 2 (8), and the rotating rod 3 (9) via 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).

2. The online monitoring type well fluid filtering device according to claim 1 is characterized in that: 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 tanks 1 (10), 2 (11) and 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) inside. 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).

3. The online monitoring type well fluid filtering device according to claim 2 is 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 arranged 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 communicated with the water inlet pipe (3).

4. The online monitoring type well fluid filtering device according to claim 3 is 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 drainage pipe (18), the drainage pipe (18) is provided with a solenoid valve 6 (24), and the water inlet pipe (3) is provided with a solenoid valve 7 (25).

5. The online monitoring type well fluid filtering device according to claim 2 is characterized in that: 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) cooperating 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), 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), 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 pin (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 latch 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 latch pin (60) extending to the outside of the filter box (27) and cooperating with the latch slot (59) is fixedly mounted on the other side of the movable plate (56).

6. The online monitoring type well fluid filtering device according to claim 5 is characterized in that: The bottoms of the filter tanks 1 (10), 2 (11) and 3 (12) are respectively provided with magnetic couplers (32) cooperating with the rotating rod 1 (7), 2 (8) and 3 (9); a driving rod (33) is fixedly mounted on the top of each of the magnetic couplers (32); a driving block (34) is disposed on each of the driving rods (33); and a driving groove (35) cooperating with the driving block (34) is disposed on the bottom of each of the filter boxes (27).

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

8. The online monitoring type well fluid filtering device according to claim 7 is 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), and 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 block (50) and the mounting ring, and 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).

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

10. The online monitoring type well fluid filtering device according to claim 1, characterized in that: 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 a second time; 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, which is: In the formula, is the turbidity detection index, is the turbidity of the well fluid, for right The weight factor of is the total organic carbon concentration of the well fluid, for right The weight factor of is the conductivity of the well fluid, for right The weight factor of .

Images