A filter-pressing drilling fluid primary solid control separation device and a use method thereof

Abstract

This invention discloses a pressure filter drilling fluid primary solids control separation device and its usage method, relating to the technical field of drilling fluid separation equipment. It includes a filter box, with a pressure plate slidably mounted at one end. A straight steel pipe section is connected to the pressure plate, which is sequentially connected to a butterfly valve, a barbed pipe, and then to an inlet hose. The pressure plate is driven to reciprocate by a hydraulic mechanism I mounted on a base. A screen and a baffle plate are detachably mounted at the other end of the filter box. A flip-top plate is located at the lower part of the filter box near the screen end, and the flip-top plate is connected to the filter box via a hinge. Compared with traditional vibrating screens, this device is vibration-free, discharges drier cuttings, and recovers more drilling fluid, offering advantages in environmental protection and energy conservation.

Description

Technical Field

[0001] This invention relates to the field of drilling fluid separation equipment technology, specifically to a pressure filter drilling fluid primary solids control separation device and its usage method. Background Technology

[0002] With the rapid development of drilling technology and the increasing number of horizontal wells, deep wells, and ultra-deep wells, higher demands are being placed on solids control equipment. The national "dual-carbon" strategy, as an important measure to address global climate change, emphasizes building a green drilling system and strengthening ecological environmental protection and energy conservation and emission reduction, which is another requirement for current drilling solids control equipment. Faced with the current situation, researching efficient, economical, low-carbon, and environmentally friendly drilling equipment has become the mainstream trend.

[0003] Drilling fluid, the "blood" of oil drilling, is used throughout the entire drilling process. It has high performance requirements and is very expensive. Currently, the primary solids control equipment is a vibrating screen, which operates continuously during drilling. Its principle is to use a vibrating motor to generate power through high-frequency vibration, which drives the screen box to move along a designed trajectory, thereby achieving solid-liquid separation through mechanical vibration.

[0004] In recent years, major solids control equipment manufacturers have successively developed negative pressure vibrating screens from the perspective of energy conservation and emission reduction. These screens achieve solid-liquid separation through mechanical vibration combined with negative pressure adsorption, thereby reducing the dryness of drill cuttings. Faced with the high cost of drilling fluids and the stringent requirements for energy conservation and emission reduction, the development of new primary solids control separation devices for drilling fluids that can significantly reduce the dryness of cuttings, decrease the total amount of waste generated by the equipment, reduce the hazards caused by vibration, and effectively recover drilling fluids has become a major development trend in primary solids control equipment.

[0005] Based on this, the industry is still continuously optimizing existing solids separation equipment according to production needs, in order to design equipment with simpler structure, more convenient use, more stable operation, and greater advantages in environmental protection and energy conservation and emission reduction. Summary of the Invention

[0006] This invention aims to overcome the above-mentioned technical problems and proposes a pressure filtration drilling fluid primary solids control separation device. Compared with the traditional primary drilling fluid solids control device - vibrating screen, the separation principle is different. This device uses the pressure filtration separation principle to achieve solid-liquid separation of drilling fluid. It is vibration-free, produces drier rock cuttings, and recovers more drilling fluid, which has greater advantages in terms of environmental protection and energy conservation and emission reduction.

[0007] This invention is achieved through the following technical solution: A pressure filter drilling fluid primary solids control separation device includes a filter box, a pressure plate is slidably mounted on one end of the filter box, a steel pipe straight section is connected to the pressure plate, the steel pipe straight section is connected in sequence to a butterfly valve, a barbed pipe and then to a fluid inlet hose, and the pressure plate is driven to reciprocate by a hydraulic mechanism I installed on the base. A screen and a baffle plate are detachably installed at the other end of the filter box. A flip-top plate is provided at the lower part of the filter box near the screen end. The flip-top plate is connected to the filter box by a hinge.

[0008] Furthermore, an installation plate is provided below the filter box. The installation plate is connected to a hydraulic mechanism II via a hinge. The other end of the hydraulic mechanism II is hinged to the tilting base plate via a hinge. The hydraulic mechanism II drives the tilting base plate to open, close, and tilt.

[0009] Furthermore, the baffle plate is detachably installed on the filter box via the slots on the L-shaped support provided on both sides of the front end of the filter box.

[0010] Furthermore, the screen is pressed by a U-shaped airbag screen pressing device, and the L-shaped base is provided with a fixing plate for positioning the U-shaped airbag screen pressing device.

[0011] Furthermore, the butterfly valve is connected to a straight steel pipe section and a barbed pipe via flanges; the straight steel pipe section is welded to the pressure plate.

[0012] Furthermore, hydraulic mechanism I is a three-stage telescopic hydraulic cylinder, and hydraulic mechanism I is fixed to the base by a mounting seat and fixing bolt I.

[0013] Furthermore, the filtration accuracy of the screen is 200~320 mesh; a sealing strip is provided between the screen and the filter box.

[0014] Furthermore, the filter box is mounted on the base by fixing bolt II, and the base is mounted on the primary solids control equipment of the circulating tank at the drilling site.

[0015] Furthermore, a pressure sensor is provided on the pressure plate.

[0016] A method of using the aforementioned pressure filter drilling fluid primary solids control separation equipment includes the following steps: S1. A certain amount of drilling fluid is introduced into the filter box through the inlet hose; S2. Start hydraulic mechanism I. Hydraulic mechanism I drives the pressure plate to move towards the screen until the pressure sensor on the pressure plate detects that the pressure reaches 0.45~0.55MPa. Maintain this pressure for 3~5s. Then, hydraulic mechanism I controls the pressure plate to stop moving. The speed at which the pressure plate moves is 40~50mm / s. S3. Start hydraulic mechanism II. Hydraulic mechanism II drives the tilting base plate to tilt, and hydraulic mechanism I controls the pressure plate to move in the opposite direction, so that the separated solid phase is discharged from the filter box. S4. After unloading is completed, hydraulic mechanism II drives the tilting base plate to reset and close. S5. Then, inject a certain amount of drilling fluid into the filter box through the inlet hose until the pressure plate is reset to its original position. Repeat steps S2 to S4 until the separation operation is completed.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: I. In this invention, the novel pressure filter drilling fluid primary solids control separation equipment adopts a different separation principle compared with the traditional drilling fluid primary solids control equipment - vibrating screen. This device eliminates the noise pollution caused by vibration separation through pressure filter solid-liquid separation, while the discharged solid phase is drier and more drilling fluid is recovered, effectively reducing the total amount of waste discharged by the primary solids control equipment, which meets the overall requirements of on-site environmental protection and energy conservation and emission reduction.

[0018] II. In this invention, the pressure filter drilling fluid primary solids control separation equipment feeds fluid through a channel formed by a straight steel pipe section, a barbed pipe, and a fluid inlet hose connected to the pressure plate. As the pressure plate moves towards the screen, material is continuously added. Material replenishment stops once the solid phase in the filter box reaches a certain concentration, thus enabling online feeding to a certain extent and improving separation efficiency. The barbed pipe design facilitates shift cleaning, prevents clogging, and allows for quick disassembly and cleaning.

[0019] Third, in this invention, the pressure filter drilling fluid primary solid control separation device adopts a "liquid inlet structure" consisting of a liquid inlet hose, a butterfly valve, and a straight steel pipe section, which facilitates the adjustment of the liquid inlet volume and meets the stroke requirements of the hydraulic mechanism I driving the pressure plate to reciprocate and compress.

[0020] IV. In this invention, the screen of the filter press drilling fluid primary solids separation device is provided with a baffle plate at the rear end away from the pressure plate end to prevent liquid splashing. At the same time, it is designed with a flip-over bottom plate. The hydraulic mechanism II hinged to the mounting plate enables remote control and automatic slag discharge of the device. The flip-over bottom plate is located at the bottom of the filter box near the screen side to facilitate the smooth discharge of slag from below.

[0021] V. In this invention, the baffle plate is detachably installed on the filter box via the slots on the L-shaped support on both sides of the front end of the filter box. The baffle plate can effectively solve the problem of mud splashing, has a good sealing effect, and helps to achieve clean production on site. At the same time, the slot structure design on both sides of the L-shaped support is ingenious and can realize the quick installation and removal of the baffle plate.

[0022] VI. In this invention, the screen is pressed by a U-shaped airbag screen pressing device. The L-shaped base is provided with a fixing plate for positioning the U-shaped airbag screen pressing device. The U-shaped airbag screen pressing device is the structure disclosed in patent number "CN208894619U". The U-shaped airbag in the U-shaped airbag screen pressing device is a hollow structure and is connected to an airtight nozzle. The airtight nozzle is provided with an exhaust valve. The structure is simple and easy to operate, which can realize the quick disassembly and assembly of the screen, reduce the labor intensity of on-site operators, and facilitate the cleaning and maintenance of the entire equipment.

[0023] VII. In this invention, the hydraulic mechanism I adopts a three-stage telescopic hydraulic cylinder, which is stable and reliable, has a long stroke during operation, and occupies a small area when retracted, effectively solving the problem of reducing equipment size and saving installation space.

[0024] 8. In this invention, through testing, screens with a mesh size of 320 or lower can be selected, with a preferred filtration accuracy of 200-320 mesh screens, which can meet on-site filtration requirements while maximizing efficiency. In specific implementation, screens with appropriate mesh sizes can be adjusted and replaced according to on-site needs to ensure that the separation requirements of the primary drilling fluid solids control equipment are met; a sealing strip is provided between the screen and the filter box to achieve effective sealing between the screen and the filter box.

[0025] 9. In this invention, the filter box is installed on the base by fixing bolt II, and the base is installed at the location of the primary solids control equipment of the circulating tank at the drilling site.

[0026] 10. In this invention, a pressure sensor is provided on the pressure plate to monitor the pressure in the filter box.

[0027] XI. This invention also proposes a method for using a novel pressure-filter drilling fluid primary solids separation device. This method facilitates automated control, enabling automatic feeding and slag discharge. Furthermore, it allows for drier discharged cuttings, recovery of more drilling fluid, and improved separation efficiency. The resulting drilling fluid also meets production requirements, offering significant advantages in environmental protection and energy conservation. Attached Figure Description

[0028] Figure 1 This invention relates to a novel pressure-filter drilling fluid primary solids control and separation device.

[0029] Figure 2 This is an initial state diagram of a pressure filter drilling fluid primary solids control separation device.

[0030] Figure 3 This is a compression state diagram of a pressure filter drilling fluid primary solids control separation device.

[0031] Figure 4 This is a diagram showing the solids removal status of a pressure filter drilling fluid primary solids control and separation device.

[0032] Figure 5 This is a magnified view of the part where the U-shaped airbag screen clamping device is located.

[0033] The components include: 1. Base; 2. Baffle plate; 3. Filter box; 4. Fixing bolt II; 5. Mounting seat; 6. Fixing bolt I; 7. Hydraulic mechanism I; 8. Inlet hose; 9. Barbed tube; 10. Flange; 11. Butterfly valve; 12. Steel pipe straight section; 13. Pressure plate; 14. Hydraulic mechanism II; 15. Tilting base plate; 16. Sealing strip; 17. Screen; 18. U-shaped airbag screen clamping device; 19. Fixing plate; 20. Hinge; 21. Mounting plate; 22. L-shaped support. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to embodiments, but the implementation of the present invention is not limited thereto.

[0035] Example 1 This embodiment is the most basic implementation, a pressure filter drilling fluid primary solids control separation device, relating to the technical field of drilling fluid separation equipment, and references... Figures 1-4 The filter box 3 includes a pressure plate 13 slidably mounted on one end of the filter box 3. A steel pipe straight section 12 is connected to the pressure plate 13. The steel pipe straight section 12 is connected to the butterfly valve 11, the barbed pipe 9 and then to the liquid inlet hose 8 in sequence. The pressure plate 13 is driven to reciprocate by a hydraulic mechanism I7 installed on the base 1. A set of hydraulic mechanisms I7 is symmetrically installed on both sides of the pressure plate 13. The other end of the filter box 3 is detachably equipped with a screen 17 and a baffle plate 2. The lower part of the filter box 3 near the end of the screen 17 is provided with a flip-down bottom plate 15, which is connected to the filter box 3 by a hinge 20.

[0036] When using this device, operate it according to the following steps: S1. A certain amount of drilling fluid is introduced into the filter box 3 through the inlet hose 8; S2. Start the hydraulic mechanism I7. The hydraulic mechanism I7 drives the pressure plate 13 to move towards the screen 17. After the filter is pressed for a certain time or the pressure on the pressure plate 13 reaches the predetermined value, the hydraulic mechanism I7 controls the pressure plate 13 to stop moving. The speed of the pressure plate 13 should be controlled within 50mm / s. S3. Start hydraulic mechanism II14. Hydraulic mechanism II14 drives the tilting base plate 15 to tilt. At the same time, hydraulic mechanism I7 drives the pressure plate 13 to move backward in the opposite direction, so that the separated solid phase is discharged from the filter box 3. S4. After a certain period of time, the unloading is completed, and the hydraulic mechanism II14 drives the tilting base plate 15 to reset and close. S5. Then, a certain amount of drilling fluid is introduced into the filter box 3 through the inlet hose 8 until the pressure plate 13 is reset to its original position. Repeat steps S2 to S4 until the separation operation is completed.

[0037] Example 2 This embodiment is a further optimization of embodiment 1, the difference being that a mounting plate 21 is provided below the filter box 3, as shown in the reference. Figure 2 The mounting plate 21 is connected to a hydraulic mechanism II 14 via a hinge 20. The other end of the hydraulic mechanism II 14 is hinged to the flipping base plate 15 via the hinge 20. The hydraulic mechanism II 14 drives the flipping base plate 15 to open, close, and flip.

[0038] This structural design allows the hydraulic mechanism II14 to be connected to the controller, enabling remote control operations or automated operation, thus reducing the labor intensity of operators.

[0039] Example 3 The difference between this embodiment and embodiments 1-2 is that, in reference to... Figure 5 The baffle plate 2 is detachably installed on the filter box 3 via the slots on the L-shaped support 22 on both sides of the front end of the filter box 3. This facilitates the installation and removal of the baffle plate 2, effectively solves the problem of mud splashing, provides a good sealing effect, and contributes to clean production on site. At the same time, the slot structure design on both sides of the L-shaped support 22 on the front side is ingenious.

[0040] Example 4 Compared with embodiments 1-3, the difference in this embodiment is that the screen 17 is pressed by a U-shaped airbag screen pressing device 18, as shown in the reference. Figure 5 The U-shaped airbag screen clamping device 18 preferably uses the structure disclosed in patent number "CN208894619U". The U-shaped airbag in the U-shaped airbag screen clamping device 18 is hollow and connected to an airtight nozzle. The airtight nozzle is equipped with an exhaust valve. The structure is simple and easy to operate, which can realize the quick assembly and disassembly of the screen 17, reduce the labor intensity of the on-site operator, and facilitate the cleaning and maintenance of the entire equipment. The L-shaped base 22 is equipped with a fixing plate 19 for positioning the U-shaped airbag screen clamping device 18.

[0041] Example 5 The difference between this embodiment and embodiments 1-4 is that, in reference... Figure 2 The butterfly valve 11 is connected to the steel pipe straight section 12 and the barbed pipe 9 respectively through the flange 10; the steel pipe straight section 12 is welded to the pressure plate 13.

[0042] Example 6 Compared with embodiments 1-5, the difference in this embodiment is that the hydraulic mechanism I7 is a three-stage telescopic hydraulic cylinder, and the hydraulic mechanism I7 is connected and fixed to the base 1 through the mounting seat 5 and the fixing bolt I6.

[0043] Example 7 Compared with Examples 1-6, the difference in this embodiment is that the screen 17 is preferably a filter screen with a filtration accuracy of 200-320 mesh; a sealing strip 16 is provided between the screen 17 and the filter box 3. In addition, the higher the mesh number of the screen 17, the more recommended that the pressure plate 13 operate under low-speed conditions.

[0044] Example 8 The difference between this embodiment and embodiments 1-7 is that, in reference to Figure 1 The filter box 3 is mounted on the base 1 by fixing bolt II4, and the base 1 is mounted on the first-level solids control equipment of the circulating tank at the drilling site.

[0045] Example 9 The difference between this embodiment and embodiments 1-8 is that a pressure sensor is provided on the pressure plate 13.

[0046] Example 10 To facilitate public understanding of this solution, this embodiment uses a superior novel pressure filter drilling fluid primary solids control separation device as an example to further illustrate this solution.

[0047] refer to Figures 1-5 The device includes a filter box 3, with a pressure plate 13 slidably mounted on one end of the filter box 3. A steel pipe straight section 12 is connected to the pressure plate 13. The steel pipe straight section 12 is connected in sequence to a butterfly valve 11, a barbed pipe 9, and then to an inlet hose 8. The pressure plate 13 is driven to reciprocate by a hydraulic mechanism I7 mounted on the base 1. A screen 17 and a baffle plate 2 are detachably mounted on the other end of the filter box 3. A flip-top bottom plate 15 is provided on the lower part of the filter box 3 near the end of the screen 17. The flip-top bottom plate 15 is flipped and connected to the filter box 3 by a hinge 20.

[0048] In this embodiment, a mounting plate 21 is provided below the filter box 3. The mounting plate 21 is connected to a hydraulic mechanism II 14 via a hinge 20. The other end of the hydraulic mechanism II 14 is hinged to the flipping base plate 15 via the hinge 20. The hydraulic mechanism II 14 drives the flipping base plate 15 to open, close, and flip.

[0049] In this embodiment, the baffle plate 2 is detachably installed on the filter box 3 via the slots on the L-shaped support 22 provided on both sides of the front end of the filter box 3.

[0050] In this embodiment, the screen 17 is pressed by a U-shaped airbag screen pressing device 18, and the L-shaped base 22 is provided with a fixing plate 19 for positioning the U-shaped airbag screen pressing device 18.

[0051] In this embodiment, the butterfly valve 11 is connected to the steel pipe straight section 12 and the barbed pipe 9 via the flange 10; the steel pipe straight section 12 is welded to the pressure plate 13.

[0052] In this embodiment, the hydraulic mechanism I7 is a three-stage telescopic hydraulic cylinder, and the hydraulic mechanism I7 is connected and fixed to the base 1 through the mounting seat 5 and the fixing bolt I6.

[0053] In this embodiment, the filtration accuracy of the screen 17 is 300 mesh; a sealing strip 16 is provided between the screen 17 and the filter box 3.

[0054] In this embodiment, the filter box 3 is installed on the base 1 by fixing bolt II4, and the base 1 is installed at the location of the primary solids control equipment of the circulating tank at the drilling site.

[0055] In this embodiment, a pressure sensor is provided on the pressure plate 13 to monitor the pressure in the filter box 3.

[0056] The method of using this pressure filter drilling fluid primary solids control separation equipment includes the following steps: S1. A certain amount of drilling fluid is introduced into the filter box 3 through the inlet hose 8; S2. Start hydraulic mechanism I7. Hydraulic mechanism I7 drives pressure plate 13 to move towards screen 17 until the pressure sensor on pressure plate 13 detects that the pressure reaches the preset value of 0.5MPa and remains there for 3 seconds. Then, hydraulic mechanism I7 controls pressure plate 13 to stop moving. (Reference) Figure 2 The pressure plate 13 moves at a speed of 50 mm / s; In this step, the preset pressure value of the pressure plate 13 should be set to 0.45~0.55MPa, which will not easily damage the screen 17 and other parts of the equipment, and can also achieve a good solid-liquid separation effect.

[0057] S3. Start hydraulic mechanism II14. Hydraulic mechanism II14 drives the tilting base plate 15 to tilt. (Refer to...) Figure 3 At the same time, the hydraulic mechanism I7 drives the pressure plate 13 to move backward in the opposite direction, so that the separated solid phase is discharged from the filter box 3; S4. After 5 seconds, unloading is completed, and hydraulic mechanism II14 drives the tilting base plate 15 to reset and close. S5. Then, a certain amount of drilling fluid is introduced into the filter box 3 through the inlet hose 8 until the pressure plate 13 is reset to its original position. Repeat steps S2 to S4 until the separation operation is completed.

[0058] Compared with traditional primary drilling fluid solids control equipment - vibrating screen, this equipment uses a pressure filtration separation principle to achieve solid-liquid separation of drilling fluid. It is vibration-free, produces drier rock cuttings, and recovers more drilling fluid, giving it a greater advantage in environmental protection and energy conservation and emission reduction, and also improving the efficiency of drilling fluid processing.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A pressure filter drilling fluid primary solids control separation device, characterized in that: Includes filter box (3), one end of filter box (3) is slidably fitted with pressure plate (13), pressure plate (13) is connected to steel pipe straight section (12), steel pipe straight section (12) is connected to butterfly valve (11), barbed pipe (9) in sequence and then connected to liquid inlet hose (8), pressure plate (13) is driven to reciprocate by hydraulic mechanism I (7) installed on base (1); The filter box (3) is detachably equipped with a screen (17) and a baffle plate (2). The filter box (3) is provided with a flip-top plate (15) on the lower part of the side near the screen (17). The flip-top plate (15) is flipped and connected to the filter box (3) through a hinge (20).

2. The pressure filter drilling fluid primary solids control separation device according to claim 1, characterized in that: The filter box (3) is provided with an installation plate (21) below it. The installation plate (21) is connected to a hydraulic mechanism II (14) via a hinge (20). The other end of the hydraulic mechanism II (14) is hinged to the flipping base plate (15) via the hinge (20). The hydraulic mechanism II (14) drives the flipping base plate (15) to open, close and flip.

3. The pressure filter drilling fluid primary solids control separation device according to claim 1, characterized in that: The baffle plate (2) is detachably installed on the filter box (3) via the slots on the L-shaped support (22) provided on both sides of the front end of the filter box (3).

4. The pressure filter drilling fluid primary solids control separation device according to claim 3, characterized in that: The screen (17) is pressed by a U-shaped airbag screen pressing device (18), and the L-shaped base (22) is provided with a fixing plate (19) for positioning the U-shaped airbag screen pressing device (18).

5. The pressure filter drilling fluid primary solids control separation device according to claim 1, characterized in that: The butterfly valve (11) is connected to the steel pipe straight section (12) and the barbed pipe (9) respectively through the flange (10); the steel pipe straight section (12) is welded to the pressure plate (13).

6. The pressure filter drilling fluid primary solids control separation device according to claim 1, characterized in that: Hydraulic mechanism I (7) is a three-stage telescopic hydraulic cylinder. Hydraulic mechanism I (7) is fixed to the base (1) by mounting seat (5) and fixing bolt I (6).

7. The pressure filter drilling fluid primary solids control separation device according to claim 1, characterized in that: The filtration accuracy of the screen (17) is 200~320 mesh; a sealing strip (16) is provided between the screen (17) and the filter box (3).

8. The pressure filter drilling fluid primary solids control separation device according to claim 1, characterized in that: The filter box (3) is installed on the base (1) by fixing bolt II (4), and the base (1) is installed at the location of the primary solids control equipment of the circulating tank at the drilling site.

9. A pressure filter drilling fluid primary solids control separation device according to claim 1, characterized in that: A pressure sensor is provided on the pressure plate (13).

10. A method of using the pressure filter drilling fluid primary solids control separation device as described in claim 4, characterized in that, Includes the following steps: S1. A certain amount of drilling fluid is introduced into the filter box (3) through the inlet hose (8); S2. Start hydraulic mechanism I (7). Hydraulic mechanism I (7) drives the pressure plate (13) to move towards the screen (17) until the pressure sensor on the pressure plate (13) detects that the pressure reaches 0.45~0.55MPa. Hold for 3~5s. Hydraulic mechanism I (7) controls the pressure plate (13) to stop moving. The speed at which the pressure plate (13) moves is 40~50mm / s. S3. Start hydraulic mechanism II (14). Hydraulic mechanism II (14) drives the flipping base plate (15) to flip. Hydraulic mechanism I (7) controls the pressure plate (13) to move in the opposite direction, so that the separated solid phase is discharged from the filter box (3). S4. After unloading is completed, the hydraulic mechanism II (14) drives the tilting base plate (15) to reset and close. S5. Then, a certain amount of drilling fluid is introduced into the filter box (3) through the inlet hose (8) until the pressure plate (13) is reset to its original position. Then, repeat steps S2 to S4 until the separation operation is completed.

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