An oil drilling fluid filtering device and a filtering method

Abstract

The present invention discloses an oil drilling fluid filtration device and a filtration method, belonging to the field of oil drilling. An oil drilling fluid filtration device includes a disc-shaped cover, and further includes: two symmetrically arranged cylindrical covers, which are respectively fixedly connected to both sides of the disc-shaped cover. Among them, a tubular fine filter plate penetrates through the axial end of the disc-shaped cover, and drain pipes respectively inserted at both ends of the tubular fine filter plate are fixedly connected to the outer walls of the two cylindrical covers; two annular plates are slidably connected inside the inner walls of the two cylindrical covers. Among them, both ends of the tubular fine filter plate are rotatably connected to the inner walls of the two annular plates, and a driving part for driving the tubular fine filter plate to reciprocate is provided on one of the annular plates. Discharge ports are provided at the lower ends of the two cylindrical covers; a liquid inlet pipe is arranged at the upper end of the disc-shaped cover; the present invention can effectively ensure the efficiency of the tubular fine filter plate in filtering drilling fluid, and can also complete the automatic cleaning of the tubular fine filter plate, making it not prone to clogging.

Description

Technical Field

[0001] The present invention relates to the technical field of oil drilling, and particularly relates to an oil drilling fluid filtering device and a filtering method. Background Art

[0002] Drilling fluid is the general name of various circulating fluids that meet the needs of drilling work with its various functions during the drilling process; drilling fluid is the blood of drilling, also known as borehole flushing fluid; there are many types of drilling fluids. Among them, fresh water is the earliest used drilling fluid, which requires no treatment, is convenient to use, and is suitable for intact rock formations and areas with sufficient water sources; mud is a widely used drilling fluid, mainly suitable for unstable hole wall rock formations such as loose, fracture-developed, easy to collapse and slough, and water-swelling and exfoliating.

[0003] After the drilling fluid is used, in order to reduce waste of resources, the used drilling fluid will be recycled. After the drilling fluid is used, a lot of stones and sediment will be mixed in the liquid. Therefore, it is necessary to filter out the impurities in the liquid. It is found during the process that smaller particles of sediment are likely to block the filter plate during filtration, which will seriously affect the filtration and recycling efficiency of the drilling fluid. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that fine sediment in the drilling fluid in the prior art is likely to block the filter plate, and to propose an oil drilling fluid filtering device and a filtering method.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0006] An oil drilling fluid filtering device includes a disc-shaped cover, and further includes: two symmetrically arranged cylindrical covers, which are respectively fixedly connected to both sides of the disc-shaped cover. Among them, a tubular fine filter plate penetrates through the axial end of the disc-shaped cover, and drain pipes respectively inserted at both ends of the tubular fine filter plate are fixedly connected to the outer walls of the two cylindrical covers; two annular plates are slidably connected inside the two cylindrical covers. Among them, both ends of the tubular fine filter plate are rotatably connected to the inner walls of the two annular plates, and a driving part for driving the tubular fine filter plate to reciprocate is provided on one of the annular plates. Discharge ports are provided at the lower ends of the two cylindrical covers; a liquid inlet pipe is arranged at the upper end of the disc-shaped cover. Among them, the lower end of the liquid inlet pipe is fixedly connected to a treatment box communicated with it, a coarse filter plate is installed in the treatment box, and the bottom of the treatment box and the upper end of the disc-shaped cover are fixedly connected and communicated through a connecting pipe.

[0007] In order to drive the tubular fine filter plate to slide reciprocally, preferably, the driving part includes a driving motor fixedly installed on the annular plate, and a driving gear is fixedly installed on the output shaft of the driving motor. Among them, a reciprocating lead screw is rotatably connected to the annular plate, and a driven gear meshed with the driving gear is fixedly installed on the reciprocating lead screw. The outer wall of the reciprocating lead screw is threadedly connected with a reciprocating slider matching therewith, and the reciprocating slider is fixedly connected to the cylindrical cover.

[0008] In order to drive the tubular fine filter plate to rotate, further, an annular gear is fixedly installed on the outer wall of the tubular fine filter plate, and the annular gear is meshed with the driven gear.

[0009] In order to blow off the sediment on the outer wall of the tubular fine filter plate, preferably, annular pipes are fixedly installed on the outer walls of both drainage pipes, and air nozzles facing the inner wall of the tubular fine filter plate are fixedly installed on the outer walls of both annular pipes. Among them, telescopic air bags are fixedly installed between the two annular plates and the inner wall of the cylindrical cover, and an air suction pipe and an exhaust pipe communicated therewith are fixedly connected to the two telescopic air bags. One-way valves are fixedly installed in both the air suction pipe and the exhaust pipe, and the ends of the two exhaust pipes are respectively fixedly connected and communicated with the two annular pipes.

[0010] In order to sweep off the sediment on the outer wall of the tubular fine filter plate, preferably, rotating rods rotatably connected to the outer wall of the disc-shaped cover are arranged at the inner bottoms of both cylindrical covers. Among them, turntables are fixedly installed on both rotating rods, and first brushes are arranged on the outer walls of both turntables. The annular plate and the rotating rod are connected by an interlocking mechanism, and the interlocking mechanism is used to drive the rotating rod to rotate.

[0011] In order to automatically drive the rotating rod to rotate, further, the interlocking mechanism includes a pull rope fixedly wound around the outer wall of the rotating rod, and the rotating rod and the outer wall of the disc-shaped cover are elastically connected by a torsion spring. Among them, a pulley is rotatably installed on the outer wall of the disc-shaped cover, and the end of the pull rope passes through the pulley and is fixedly connected to the annular plate.

[0012] In order to sweep off the stones on the coarse filter plate, still further, a rectangular pipe is fixedly connected to the inner bottom of the treatment box, and the coarse filter plate is fixedly installed at the upper port of the rectangular pipe. Among them, a cleaning plate is arranged at the upper end of the coarse filter plate, a second brush abutted against the upper end surface of the coarse filter plate is arranged at the lower end of the cleaning plate, a pushing part for driving the cleaning plate to move reciprocally is arranged on the treatment box, and cleaning grooves are arranged on both sides at the lower end of the treatment box, and covers are installed in both cleaning grooves.

[0013] In order to automatically drive the cleaning plate to reciprocate, further, the pushing part includes an upper push rod slidably connected to the outer wall of the processing box. One end of the upper push rod extends into the processing box and is fixedly connected to the cleaning plate. Among them, a connecting plate is fixedly connected to the other end of the upper push rod, and the end of the reciprocating lead screw is rotatably connected to the connecting plate.

[0014] In order to automatically dredge the coarse filter plate, further, a lower push rod extending to the lower end of the coarse filter plate is fixedly connected to the side wall of the connecting plate. A roller is rotatably connected to the end of the lower push rod, and a third brush abutting against the lower end of the coarse filter plate is provided on the outer wall of the roller.

[0015] A filtering method for petroleum drilling fluid, the operation steps are as follows:

[0016] Step 1: Transport the recovered drilling fluid into the liquid inlet pipe, and the drilling fluid will pass through the coarse filter plate and flow into the disc-shaped cover.

[0017] Step 2: When the drilling fluid enters the disc-shaped cover, the tubular fine filter plate will filter out the fine sediment in the drilling fluid.

[0018] Step 3: During this period, the tubular fine filter plate will also rotate when reciprocating.

[0019] Step 4: When the annular plate reciprocates, the annular plate will push the fine sediment accumulated in the cylindrical cover to the discharge port.

[0020] Step 5: The annular pipe will blow the sediment on the outer wall of the tubular fine filter plate into the cylindrical cover through the air nozzles.

[0021] Step 6: The sediment on the outer wall of the tubular fine filter plate is discharged from the discharge port.

[0022] Compared with the prior art, the present invention provides a petroleum drilling fluid filtering device, which has the following beneficial effects:

[0023] 1. For this petroleum drilling fluid filtering device, the driving motor drives the reciprocating lead screw to rotate, and the annular plate drives the tubular fine filter plate to reciprocate in the two drain pipes. Thus, the tubular fine filter plate uses different parts to filter the drilling fluid, ensuring the efficiency of the tubular fine filter plate in filtering the drilling fluid.

[0024] 2. For this petroleum drilling fluid filtering device, the rotating driven gear will also drive the tubular fine filter plate to rotate. Thus, the tubular fine filter plate will also rotate when reciprocating. The rotating tubular fine filter plate will use centrifugal force to throw the fine sediment on the outer wall into the cylindrical cover, thereby completing the automatic cleaning work of the tubular fine filter plate and making it not easy to be blocked.

[0025] 3. The oil drilling fluid filtering device can push the fine sediment accumulated in the cylindrical cover to the discharge port through the reciprocating sliding annular plate, so that the sediment in the cylindrical cover can be discharged more efficiently.

[0026] 4. The oil drilling fluid filtering device can indirectly squeeze and stretch the telescopic airbag through the reciprocating sliding annular plate. When the telescopic airbag is squeezed, the internal air will be discharged through the exhaust pipe and transported into the annular pipe, and finally blown onto the inner wall of the tubular fine filter plate from the air blowing nozzles on the outer wall of the annular pipe, so as to blow the sediment on the outer wall of the tubular fine filter plate into the cylindrical cover, thereby improving the efficiency of the tubular fine filter plate in shaking off sediment.

[0027] 5. The oil drilling fluid filtering device can pull the pull rope through the sliding annular plate, and the rotating rod will drive the turntable to rotate, and the turntable will drive the first brush to sweep circumferentially, and the first brush will sweep off the sediment on the outer wall of the tubular fine filter plate, thereby further improving the efficiency of the tubular fine filter plate in shaking off sediment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a first - perspective axonometric structural schematic diagram of an oil drilling fluid filtering device proposed by the present invention;

[0029] Figure 2 It is a second - perspective axonometric structural schematic diagram of an oil drilling fluid filtering device proposed by the present invention;

[0030] Figure 3 It is a sectional structural schematic diagram of an oil drilling fluid filtering device proposed by the present invention;

[0031] Figure 4 It is of an oil drilling fluid filtering device proposed by the present invention Figure 3 partial structural schematic diagram;

[0032] Figure 5 It is of an oil drilling fluid filtering device proposed by the present invention Figure 3 enlarged view of part A;

[0033] Figure 6 It is of an oil drilling fluid filtering device proposed by the present invention Figure 3 enlarged view of part B.

[0034] In the figure: 1, disc-shaped cover; 2, cylindrical cover; 3, drain pipe; 4, tubular fine filter plate; 5, liquid inlet pipe; 6, treatment tank; 7, connecting pipe; 8, coarse filter plate; 9, rectangular pipe; 10, annular plate; 11, reciprocating lead screw; 12, drive motor; 13, driven gear; 14, driving gear; 15, annular gear; 16, reciprocating slider; 17, cover plate; 18, annular pipe; 19, air blowing nozzle; 20, telescopic airbag; 21, suction pipe; 22, exhaust pipe; 23, discharge port; 24, rotating rod; 25, turntable; 26, first brush; 27, torsion spring; 28, pulley; 29, pull rope; 30, connecting plate; 31, cleaning plate; 32, second brush; 33, roller; 34, third brush; 35, lower push rod; 36, upper push rod; 37, cleaning groove. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] Embodiment 1:

[0038] Refer to Figures 1 - 6 , an oil drilling fluid filtering device, including a disc-shaped cover 1, and further including: two symmetrically arranged cylindrical covers 2, respectively fixedly connected to both sides of the disc-shaped cover 1. Among them, a tubular fine filter plate 4 penetrates through the axial end of the disc-shaped cover 1, and drain pipes 3 respectively inserted at both ends of the tubular fine filter plate 4 are fixedly connected to the outer walls of the two cylindrical covers 2; two annular plates 10 are slidably connected inside the inner walls of the two cylindrical covers 2. Among them, both ends of the tubular fine filter plate 4 are rotatably connected to the inner walls of the two annular plates 10, and a driving part for driving the tubular fine filter plate 4 to reciprocate is provided on one of the annular plates 10. Discharge ports 23 are provided at the lower ends of the two cylindrical covers 2; a liquid inlet pipe 5 is arranged at the upper end of the disc-shaped cover 1. Among them, the lower end of the liquid inlet pipe 5 is fixedly connected to a treatment tank 6 communicated with it, a coarse filter plate 8 is installed in the treatment tank 6, and the bottom of the treatment tank 6 and the upper end of the disc-shaped cover 1 are fixedly connected and communicated through a connecting pipe 7.

[0039] During use, the recycled drilling fluid is conveyed into the liquid inlet pipe 5, and the drilling fluid will pass through the coarse filter plate 8 and flow into the disc-shaped cover 1. When passing through the coarse filter plate 8, the coarse filter plate 8 will filter out the large particle stones in the drilling fluid. When the drilling fluid enters the disc-shaped cover 1, the drilling fluid will pass through the tubular fine filter plate 4 not wrapped by the drain pipe 3 and enter the drain pipe 3, and finally will be discharged from the ends of the two drain pipes 3. When the drilling fluid passes through the tubular fine filter plate 4, the tubular fine filter plate 4 will filter out the fine sediment in the drilling fluid. During this period, the driving part will drive the tubular fine filter plate 4 to rotate automatically while reciprocatingly sliding, and the rotating tubular fine filter plate 4 will use centrifugal force to throw the fine sediment on the outer wall into the cylindrical cover 2, thus completing the automatic cleaning work of the tubular fine filter plate 4 and making it not easy to be blocked.

[0040] Embodiment 2:

[0041] Refer to Figure 3 And Figure 5 , which is basically the same as Embodiment 1. Further, the specific implementation scheme of the driving part is specifically disclosed.

[0042] The driving part includes a driving motor 12 fixedly installed on the annular plate 10. A driving gear 14 is fixedly installed on the output shaft of the driving motor 12. Among them, a reciprocating lead screw 11 is rotatably connected to the annular plate 10, and a driven gear 13 meshed with the driving gear 14 is fixedly installed on the reciprocating lead screw 11. The outer wall of the reciprocating lead screw 11 is threadedly connected with a reciprocating slider 16 that cooperates with it, and the reciprocating slider 16 is fixedly connected to the cylindrical cover 2.

[0043] During the filtration period of the tubular fine filter plate 4, the driving motor 12 will drive the driven gear 13 to rotate through the driving gear 14, the driven gear 13 will drive the reciprocating lead screw 11 to rotate, and the reciprocating lead screw 11 will drive the reciprocating slider 16 to reciprocate. Since the reciprocating slider 16 is fixed on the cylindrical cover 2, the reciprocating lead screw 11 will passively drive the annular plate 10 to reciprocate in the cylindrical cover 2, and the annular plate 10 will drive the tubular fine filter plate 4 to reciprocate in the two drain pipes 3. Thus, the tubular fine filter plate 4 will use different parts to filter the drilling fluid, ensuring the filtration efficiency of the tubular fine filter plate 4 for the drilling fluid.

[0044] Furthermore, an annular gear 15 is fixedly installed on the outer wall of the tubular fine filter plate 4. The annular gear 15 is meshed and connected with the driven gear 13. When the driven gear 13 rotates, the driven gear 13 will drive the tubular fine filter plate 4 to rotate through the annular gear 15. That is, the tubular fine filter plate 4 will also generate self-rotation while reciprocatingly sliding. The self-rotating tubular fine filter plate 4 will use centrifugal force to throw the fine sediment on the outer wall into the cylindrical cover 2, thus completing the automatic cleaning work of the tubular fine filter plate 4 and making it not prone to clogging. When the annular plate 10 reciprocatingly slides, the annular plate 10 will push the fine sediment accumulated in the cylindrical cover 2 to the discharge port 23, so that the sediment in the cylindrical cover 2 can be discharged more efficiently.

[0045] Embodiment 3:

[0046] Refer to Figure 3 With Figure 6 , which is basically the same as Embodiment 2. Furthermore, a specific implementation scheme for blowing air to dredge the tubular fine filter plate 4 is specifically added.

[0047] Annular pipes 18 are fixedly installed on the outer walls of both drain pipes 3. Blowing nozzles 19 facing the inner wall of the tubular fine filter plate 4 are fixedly installed on the outer walls of both annular pipes 18. Among them, telescopic air bags 20 are fixedly installed between the inner walls of both annular plates 10 and the cylindrical cover 2. An air suction pipe 21 and an exhaust pipe 22 communicated with it are fixedly connected to both telescopic air bags 20. Check valves are fixedly installed in both the air suction pipe 21 and the exhaust pipe 22. The ends of both exhaust pipes 22 are fixedly connected and communicated with both annular pipes 18 respectively;

[0048] The reciprocatingly sliding annular plate 10 will indirectly squeeze and stretch the telescopic air bag 20. When the telescopic air bag 20 is squeezed, it will discharge the internal air through the exhaust pipe 22 and transport it into the annular pipe 18. Finally, it will be blown from the blowing nozzle 19 on the outer wall of the annular pipe 18 onto the inner wall of the tubular fine filter plate 4, thus blowing the sediment on the outer wall of the tubular fine filter plate 4 into the cylindrical cover 2, thereby improving the efficiency of the tubular fine filter plate 4 in throwing off sediment. When the telescopic air bag 20 is stretched, the telescopic air bag 20 will suck in outside air through the air suction pipe 21.

[0049] Embodiment 4:

[0050] Refer to Figure 3 With Figure 6 , which is basically the same as Embodiment 3. Furthermore, a specific implementation scheme for cleaning the tubular fine filter plate 4 is specifically added.

[0051] The inner bottoms of the two cylindrical covers 2 are both provided with rotating rods 24 rotatably connected to the outer wall of the disc-shaped cover 1. Among them, rotating discs 25 are fixedly installed on both of the two rotating rods 24, and first brushes 26 are provided on the outer walls of the two rotating discs 25. A linkage mechanism is connected between the annular plate 10 and the rotating rod 24, and the linkage mechanism is used to drive the rotating rod 24 to rotate; the linkage mechanism includes a pulling rope 29 fixedly wound around the outer wall of the rotating rod 24, and the rotating rod 24 is elastically connected to the outer wall of the disc-shaped cover 1 through a torsion spring 27. Among them, a pulley 28 is rotatably installed on the outer wall of the disc-shaped cover 1, and the end of the pulling rope 29 passes through the pulley 28 and is fixedly connected to the annular plate 10.

[0052] When the annular plate 10 slides away from the disc-shaped cover 1, the annular plate 10 will pull the pulling rope 29, and the pulling rope 29 will then be unloaded from the rotating rod 24 and drive the rotating rod 24 to rotate. The rotating rod 24 will drive the rotating disc 25 to rotate, and the rotating disc 25 will drive the first brush 26 to perform a circumferential sweep. The first brush 26 will sweep the sediment on the outer wall of the tubular fine filter plate 4, thereby further improving the efficiency of the tubular fine filter plate 4 in shaking off sediment. When the annular plate 10 approaches the disc-shaped cover 1, the torsion spring 27 will drive the rotating rod 24 to reverse, thereby winding the pulling rope 29 again.

[0053] Embodiment 5:

[0054] Refer to Figure 3 And Figure 4 is basically the same as Embodiment 4. Further, a specific implementation scheme for cleaning the coarse filter plate 8 is specifically added.

[0055] A rectangular pipe 9 is fixedly connected to the inner bottom of the treatment tank 6, and the coarse filter plate 8 is fixedly installed at the upper port of the rectangular pipe 9. Among them, a cleaning plate 31 is provided at the upper end of the coarse filter plate 8, and a second brush 32 abutted against the upper end surface of the coarse filter plate 8 is provided at the lower end of the cleaning plate 31. A pushing part for driving the cleaning plate 31 to reciprocate is provided on the treatment tank 6. Cleaning grooves 37 are provided on both sides of the lower end of the treatment tank 6, and covers 17 are installed in both of the two cleaning grooves 37. The pushing part includes an upper push rod 36 slidably connected to the outer wall of the treatment tank 6. One end of the upper push rod 36 extends into the treatment tank 6 and is fixedly connected to the cleaning plate 31. Among them, the other end of the upper push rod 36 is fixedly connected to a connecting plate 30, and the end of the reciprocating lead screw 11 is rotatably connected to the connecting plate 30;

[0056] When the annular plate 10 reciprocates, the annular plate 10 will also drive the upper push rod 36 and the lower push rod 35 to reciprocate through the connecting plate 30. The upper push rod 36 will drive the cleaning plate 31 to reciprocate on the coarse filter plate 8, and the cleaning plate 31 will sweep the large particle stones on the coarse filter plate 8 to both sides of the treatment tank 6 through the second brush 32, thereby preventing the large particle stones from accumulating on the coarse filter plate 8 for a long time.

[0057] Furthermore, a lower push rod 35 fixedly connected to the side wall of the connecting plate 30 extends to the lower end of the coarse filter plate 8. The end of the lower push rod 35 is rotatably connected to a roller 33. A third brush 34 that abuts against the lower end of the coarse filter plate 8 is provided on the outer wall of the roller 33. The reciprocatingly sliding lower push rod 35 will drive the roller 33 to roll on the bottom plate of the coarse filter plate 8, and the roller 33 will push out the stones blocking the upper end face of the coarse filter plate 8 through the third brush 34, thereby preventing the stones from blocking the upper end face of the coarse filter plate 8.

[0058] A filtering method for petroleum drilling fluid, the operation steps are as follows:

[0059] Step 1: Transport the recycled drilling fluid into the liquid inlet pipe 5, and the drilling fluid will pass through the coarse filter plate 8 and flow into the disc-shaped cover 1.

[0060] Step 2: When the drilling fluid enters the disc-shaped cover 1, the tubular fine filter plate 4 will filter out the fine sediment in the drilling fluid.

[0061] Step 3: During this period, the tubular fine filter plate 4 will also rotate self - when reciprocatingly sliding.

[0062] Step 4: When the annular plate 10 reciprocatingly slides, the annular plate 10 will push the fine sediment accumulated in the cylindrical cover 2 to the discharge port 23.

[0063] Step 5: The annular pipe 18 will blow the sediment on the outer wall of the tubular fine filter plate 4 into the cylindrical cover 2 through the air - blowing nozzle 19.

[0064] Step 6: The sediment on the outer wall of the tubular fine filter plate 4 is discharged from the discharge port 23.

[0065] In the use of this oil drilling fluid filtration device, the recycled drilling fluid is conveyed into the liquid inlet pipe 5. The drilling fluid will pass through the coarse filter plate 8 and flow into the disc-shaped cover 1. When passing through the coarse filter plate 8, the coarse filter plate 8 will filter out the large particle stones in the drilling fluid. When the drilling fluid enters the disc-shaped cover 1, the drilling fluid will pass through the tubular fine filter plate 4 that is not wrapped by the drain pipe 3 and enter the drain pipe 3, and finally be discharged from the ends of the two drain pipes 3. When the drilling fluid passes through the tubular fine filter plate 4, the tubular fine filter plate 4 will filter out the fine sediment in the drilling fluid. During this period, the driving motor 12 will drive the driven gear 13 to rotate through the driving gear 14. The driven gear 13 will drive the reciprocating lead screw 11 to rotate. The reciprocating lead screw 11 will drive the reciprocating slider 16 to slide reciprocally. Since the reciprocating slider 16 is fixed on the cylindrical cover 2, the reciprocating lead screw 11 will passively drive the annular plate 10 to slide reciprocally in the cylindrical cover 2. The annular plate 10 will drive the tubular fine filter plate 4 to slide reciprocally in the two drain pipes 3. Thus, the tubular fine filter plate 4 will use different parts to filter the drilling fluid, ensuring the efficiency of the tubular fine filter plate 4 in filtering the drilling fluid. When the driven gear 13 rotates, the driven gear 13 will drive the tubular fine filter plate 4 to rotate through the annular gear 15, that is, the tubular fine filter plate 4 will also rotate during reciprocating sliding. The rotating tubular fine filter plate 4 will use centrifugal force to throw the fine sediment on the outer wall into the cylindrical cover 2, thus completing the automatic cleaning work of the tubular fine filter plate 4 and making it not prone to clogging.

[0066] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. An oil drilling fluid filtration device, comprising a disc-shaped cover, characterized in that, Further included are: Two symmetrically arranged cylindrical covers, which are respectively fixedly connected to both sides of the disc-shaped cover. Among them, a tubular fine filter plate penetrates through the axial end of the disc-shaped cover, and drain pipes respectively inserted at both ends of the tubular fine filter plate are fixedly connected to the outer walls of the two cylindrical covers. The axial direction of the tubular fine filter plate is perpendicular to the axial direction of the liquid inlet pipe. Two annular plates, which are slidably connected inside the inner walls of the two cylindrical covers. Among them, both ends of the tubular fine filter plate are rotatably connected to the inner walls of the two annular plates. A driving part for driving the reciprocating movement of the tubular fine filter plate is provided on one of the annular plates. Discharge ports are provided at the lower ends of the two cylindrical covers. A liquid inlet pipe, which is arranged at the upper end of the disc-shaped cover. Among them, the lower end of the liquid inlet pipe is fixedly connected to a treatment box communicated therewith. A coarse filter plate is installed inside the treatment box. The bottom of the treatment box and the upper end of the disc-shaped cover are fixedly connected and communicated through a connecting pipe. The driving part includes: A driving motor fixedly installed on the annular plate. A driving gear is fixedly installed on the output shaft of the driving motor. Among them, a reciprocating lead screw is rotatably connected to the annular plate. A driven gear meshed with the driving gear is fixedly installed on the reciprocating lead screw. A reciprocating slider matched with the reciprocating lead screw is threadedly connected to the outer wall of the reciprocating lead screw. The reciprocating slider is fixedly connected to the cylindrical cover. An annular gear is fixedly installed on the outer wall of the tubular fine filter plate. The annular gear is meshed with the driven gear. Rotating rods rotatably connected to the outer wall of the disc-shaped cover are provided at the inner bottoms of the two cylindrical covers. Among them, turntables are fixedly installed on both of the rotating rods. First brushes are provided on the outer walls of the two turntables. A chain mechanism is connected between the annular plate and the rotating rod. The chain mechanism is used for driving the rotating rod to rotate. The chain mechanism includes: A pull rope fixedly wound around the outer wall of the rotating rod. The rotating rod and the outer wall of the disc-shaped cover are elastically connected through a torsion spring. Among them, a pulley is rotatably installed on the outer wall of the disc-shaped cover. The end of the pull rope passes through the pulley and is fixedly connected to the annular plate.

2. The oil drilling fluid filtration device according to claim 1, characterized in that, Annular pipes are fixedly installed on the outer walls of the two drain pipes. Air blowing nozzles facing the inner wall of the tubular fine filter plate are fixedly installed on the outer walls of the two annular pipes. Among them, telescopic air bags are fixedly installed between the two annular plates and the inner walls of the cylindrical covers. An air suction pipe and an exhaust pipe communicated therewith are fixedly connected to the two telescopic air bags. Check valves are fixedly installed in both the air suction pipe and the exhaust pipe. The ends of the two exhaust pipes are respectively fixedly connected and communicated with the two annular pipes.

3. The oil drilling fluid filtering device according to claim 1, characterized in that, A rectangular pipe is fixedly connected to the inner bottom of the treatment box. The coarse filter plate is fixedly installed at the upper port of the rectangular pipe. Among them, a cleaning plate is provided at the upper end of the coarse filter plate. A second brush abutting against the upper surface of the coarse filter plate is provided at the lower end of the cleaning plate. A pushing part for driving the cleaning plate to reciprocate is provided on the treatment box. Cleaning grooves are provided on both sides at the lower end of the treatment box. Covers are installed in both of the cleaning grooves.

4. The oil drilling fluid filtering device according to claim 3, characterized in that, The pushing part includes: An upper push rod slidably connected to the outer wall of the treatment box. One end of the upper push rod extends into the treatment box and is fixedly connected to the cleaning plate. Wherein, the other end of the upper push rod is fixedly connected with a connecting plate, and the end of the reciprocating lead screw is rotatably connected to the connecting plate.

5. An oil drilling fluid filtration device according to claim 4, characterized in that, A lower push rod extending to the lower end of the coarse filter plate is fixedly connected to the side wall of the connecting plate. The end of the lower push rod is rotatably connected with a roller, and a third brush abutting against the lower end of the coarse filter plate is arranged on the outer wall of the roller.

6. A filtering method for an oil drilling fluid, using an oil drilling fluid filtering device according to any one of claims 1-5, characterized in that, The operation steps are as follows: Step 1: The recycled drilling fluid is conveyed into the liquid inlet pipe, and the drilling fluid will pass through the coarse filter plate and flow into the disc-shaped cover. Step 2: When the drilling fluid enters the disc-shaped cover, the tubular fine filter plate will filter out the fine sediment in the drilling fluid. Step 3: During this period, the tubular fine filter plate will also rotate self when reciprocatingly sliding. Step 4: When the annular plate reciprocatingly slides, the annular plate will push the fine sediment accumulated in the columnar cover to the discharge port. Step 5: The annular pipe will blow the sediment on the outer wall of the tubular fine filter plate into the columnar cover through the air blowing nozzle. Step 6: The sediment on the outer wall of the tubular fine filter plate is discharged from the discharge port.

Images