A flowback fluid treatment apparatus for oilfield completions

Abstract

The utility model provides a kind of oilfield completion is with backflow and drainage liquid processing equipment, comprising: filter assembly, the filter assembly is by installation frame, buffer rod, fixed frame and fixed plate composition, filter screen is fixedly connected on installation frame inner chamber upper end, vibrator is fixedly connected by main cross plate in installation frame inner chamber lower end, while the buffer groove is opened symmetrically in installation frame both ends lower surface, buffer rod upper end is slidably connected in buffer groove by elastic element, and buffer rod lower end is fixedly connected fixed frame, fixed frame inner chamber is symmetrically connected fixed plate, and main sliding slot is opened symmetrically in fixed plate both sides, and the position corresponding connection main sliding block of the opposite main sliding slot of moving plate both ends. The utility model cooperates by installation frame, buffer rod, fixed frame, vibrator and cleaning brush, so that the filter assembly of the equipment can have good self-cleaning effect, can effectively reduce the probability that filter screen is blocked, ensure that backflow and drainage liquid can carry out smooth solid-liquid separation.

Description

Technical Field

[0001] This utility model relates to the field of backflow fluid treatment technology, specifically to a backflow fluid treatment device for oilfield well completion. Background Technology

[0002] Well completion is the final stage of drilling engineering. In oil and gas well completion, well completion includes drilling into the oil layer, selecting the completion method, and cementing and perforation operations. For low-permeability production layers or those severely contaminated by drilling mud, acidizing, hydraulic fracturing, and other production enhancement measures are also required before well completion can be considered complete. Fracturing flowback fluid refers to the residual fracturing fluid that is flowed back from the oil and gas well during the fracturing process. Its components include fracturing concentrate, flowback fluid, guar gum, formaldehyde, and other petroleum additives.

[0003] A search revealed an existing oilfield well completion flowback fluid treatment device (publication number: CN219860616U), which describes a device where "a filter screen is installed on one inner wall of the treatment tank, a conveyor is installed in the middle of the treatment tank, a pulverizing box is installed on the inner wall of the treatment tank away from the filter screen, a pulverizing roller is rotatably connected inside the pulverizing box, a guide plate is installed at the bottom of the pulverizing box, and a flow guide plate that connects to one side of the pulverizing box is installed at the bottom of the filter screen and the conveyor." This device uses an inclined filter screen to allow substances in the flowback fluid to enter the conveyor, and an electromagnet can break up the iron in the substances. The device attracts reactive substances, while unattracted substances enter the crushing chamber and are crushed by the crushing rollers. Wastewater can enter the adsorption chamber through the guide plate for filtration, thus improving the overall classification and treatment effect of the device. However, the filter screen structure in this device is relatively simple. In actual use, the filter screen surface is easily blocked by particulate matter and other impurities, which prevents the backflow liquid and the solid impurities it carries from being effectively and quickly separated. As a result, a large amount of backflow liquid will flow into the surface of the conveyor belt, which will interfere with the screening and crushing of solid materials, and may even cause untreated backflow liquid to flow directly out of the treatment tank, polluting the surrounding environment. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, a flowback fluid treatment device for oilfield well completion is provided to solve the problems mentioned in the background.

[0005] To achieve the above objectives, an oilfield well completion flowback fluid treatment device is provided, comprising: a filtration assembly; an inlet assembly, a filtration assembly, a screening and conveying assembly, an adsorption assembly, and a crushing assembly are respectively arranged inside the treatment tank; the filtration assembly consists of an installation frame, a buffer rod, a fixed frame, and a fixed plate; a filter screen is fixedly connected to the upper end of the inner cavity of the installation frame; a vibrator is fixedly connected to the lower end of the inner cavity of the installation frame via a main horizontal plate; buffer grooves are symmetrically opened on the lower surfaces of both ends of the installation frame; the upper end of the buffer rod is slidably connected to the buffer groove via an elastic element; and the lower end of the buffer rod is fixedly connected to the fixed frame; the fixed plate is symmetrically connected to the inner cavity of the fixed frame; main sliding grooves are symmetrically opened on both sides of the fixed plate; and main sliding blocks are connected to the positions of the two ends of the movable plate relative to the main sliding grooves; a main fixed rod is fixedly connected to the lower surface of the movable plate; a secondary fixed rod is fixedly connected to the lower surface of the main fixed rod; an electric rod is fixedly connected to the lower surface of the fixed plate; the telescopic rod of the electric rod is fixedly connected to the secondary fixed rod; and cleaning brushes are fixedly connected to the upper surfaces of both the fixed plate and the movable plate.

[0006] Preferably, the mounting frame has a U-shaped structure, the filter screen fixedly connected to the inner cavity of the mounting frame has a square structure, and the upper surfaces of the mounting frame and the filter screen are in the same plane. At the same time, the main horizontal plate fixedly connected to the lower end of the inner cavity of the mounting frame has a rectangular structure.

[0007] Preferably, multiple sets of buffer grooves are opened parallel and equally spaced on the lower surfaces of both ends of the mounting frame. The axial cross-section of the multiple sets of buffer grooves is a convex structure, and the size of the upper end of the buffer rod is adapted to the size of the buffer groove. At the same time, a set of elastic elements is sleeved on the upper end of the buffer rod, and a set of elastic elements is provided on the upper surface of the buffer rod.

[0008] Preferably, the buffer rod has an overall cylindrical structure, the axial section of the buffer rod has a T-shaped structure, and the fixed frame fixedly connected to the lower end of the buffer rod has a U-shaped structure. At the same time, the two sides of the fixed frame are fixedly connected to the two sides of the inner cavity of the processing box, and the outer side dimensions of the fixed frame and the mounting frame are compatible.

[0009] Preferably, multiple sets of fixing plates are fixedly connected in parallel and at equal intervals within the inner cavity of the fixing frame. All sets of fixing plates are rectangular in structure, and the fixing frame and fixing plates are combined to form a U-shaped structure. Meanwhile, three sets of main sliding grooves are opened in parallel and at equal intervals on both sides of the fixing plates along the length direction, and the main sliding grooves are rectangular in structure.

[0010] Preferably, the movable plate has a square structure, with its two end faces abutting against the sides of two adjacent sets of fixed plates, and the main slider fixedly connected to the end face of the movable plate is slidably connected in the main slide groove, while the cleaning brushes fixedly connected to the upper surfaces of the movable plate and the fixed plates abut against the lower surface of the filter screen.

[0011] Preferably, the three sets of movable plates on the same side of the fixed plate are all fixedly connected to the same set of main fixed rods. The main fixed rods are elongated and the lower surface of the main fixed rods is fixedly connected to the secondary fixed rods. The secondary fixed rods are elongated and slidably connected to the lower surface of the fixed plate. The main fixed rods and the secondary fixed rods are combined to form a king-shaped structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: through the cooperation of the mounting frame, buffer rod, fixed frame, fixed plate, moving plate, electric rod and vibrator, the filter assembly has a corresponding automatic cleaning structure, which can clean the filter screen in real time. This can effectively reduce the probability of the filter screen being blocked by solid particles in the backflow liquid, and can also help improve the efficiency of solid particles sliding to the screening and conveying assembly. This can effectively reduce the probability of backflow liquid interfering with the subsequent treatment of solid particles, and also reduce the probability of backflow liquid leaking accidentally without treatment. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model.

[0014] Figure 2 This is a front view schematic diagram of the filter component according to an embodiment of the present utility model.

[0015] Figure 3 This is a side view of the filter assembly according to an embodiment of the present invention.

[0016] Figure 4 This is a top view of the filter assembly according to an embodiment of the present invention.

[0017] In the diagram: 1. Processing tank; 2. Liquid inlet assembly; 3. Filter assembly; 4. Screening and conveying assembly; 5. Adsorption assembly; 6. Crushing assembly; 7. Filter screen; 8. Buffer tank; 9. Mounting frame; 10. Buffer rod; 11. Fixing frame; 12. Fixing plate; 13. Moving plate; 14. Main fixing rod; 15. Secondary fixing rod; 16. Electric rod; 17. Main chute; 18. Vibrator; 19. Main horizontal plate; 20. Cleaning brush. Detailed Implementation

[0018] Reference Figures 1 to 4As shown, this utility model provides a flowback fluid treatment device for oilfield well completion, including: a filter assembly 3; a treatment tank 1 is equipped with an inlet assembly 2, a filter assembly 3, a screening and conveying assembly 4, an adsorption assembly 5, and a crushing assembly 6; the filter assembly 3 consists of a mounting frame 9, a buffer rod 10, a fixed frame 11, and a fixed plate 12; a filter screen 7 is fixedly connected to the upper end of the inner cavity of the mounting frame 9; a vibrator 18 is fixedly connected to the lower end of the inner cavity of the mounting frame 9 through a main horizontal plate 19; and buffer grooves 8 are symmetrically opened on the lower surfaces of both ends of the mounting frame 9; the upper end of the buffer rod 10 is slidably connected to the buffer through an elastic element. Inside the groove 8, the lower end of the buffer rod 10 is fixedly connected to the fixed frame 11. The inner cavity of the fixed frame 11 is symmetrically connected to the fixed plate 12. The fixed plate 12 has symmetrical main slide grooves 17 on both sides. The two ends of the movable plate 13 are connected to the main slide grooves 17. At the same time, the lower surface of the movable plate 13 is fixedly connected to the main fixed rod 14. The lower surface of the main fixed rod 14 is fixedly connected to the auxiliary fixed rod 15. The lower surface of the fixed plate 12 is fixedly connected to the electric rod 16. The telescopic rod of the electric rod 16 is fixedly connected to the auxiliary fixed rod 15. The upper surfaces of the fixed plate 12 and the movable plate 13 are both fixedly connected to the cleaning brush 20.

[0019] In this embodiment, after the backflow liquid flows into the treatment tank 1 through the inlet assembly 2, it first impacts the surface of the filter screen 7 of the filter assembly 3. The backflow liquid can directly pass through the filter screen 7 and fall onto the guide plate surface of the adsorption assembly 5. The solid particles carried in the backflow liquid are intercepted by the filter screen 7. When the vibrator 18 is turned on, it can drive the mounting frame 9 and the filter screen 7 to vibrate synchronously through the main horizontal plate 19. When the electric rod 16 is turned on, its telescopic rod can push the auxiliary fixed rod 15 to perform periodic reciprocating linear motion. The auxiliary fixed rod 15 can drive the moving plate 13 and the main fixed rod 14 to perform periodic reciprocating linear motion. The corresponding cleaning brush 20 moves periodically, so as the filter screen 7 vibrates with the mounting frame 9, the lower surface of the filter screen 7 will abut against the upper surface of the cleaning brush 20, allowing the hard bristles of the cleaning brush 20 to pass through the mesh of the filter screen 7. This effectively prevents solid particles from clogging the mesh of the filter screen 7. Furthermore, under the combined effects of the inclined surface of the filter screen 7, gravity, and vibration, the efficiency of solid particles sliding to the screening and conveying component 4 can be improved, thereby ensuring that the return liquid can be smoothly separated into solid and liquid components. The return liquid can be treated by the adsorption component 5, while the solid particles can be processed by the screening and conveying component 4 and the crushing component 6 in sequence.

[0020] Meanwhile, the relevant structures and working principles of the fluid inlet assembly 2, screening and conveying assembly 4, adsorption assembly 5 and crushing assembly 6 in this application are all existing mature technologies, and have been fully disclosed in an oilfield well completion flowback fluid treatment device (announcement number: CN219860616U).

[0021] In a preferred embodiment, the mounting frame 9 has a U-shaped structure, the filter screen 7 fixedly connected to the inner cavity of the mounting frame 9 has a square structure, and the upper surfaces of the mounting frame 9 and the filter screen 7 are in the same plane. Meanwhile, the main horizontal plate 19 fixedly connected to the lower end of the inner cavity of the mounting frame 9 has a rectangular structure.

[0022] In this embodiment, as Figure 1 , Figure 2 and Figure 3 The structural design of the mounting frame 9 and the filter screen 7 can effectively reduce the probability of solid particles sliding off the surface of the filter screen 7 at the edge of the mounting frame 9, ensuring that the intercepted and separated solid particles can smoothly slide down to the screening and conveying assembly 4. At the same time, the vibrator 18 installed on the lower surface of the main horizontal plate 19 is waterproof.

[0023] As a preferred embodiment, multiple sets of buffer grooves 8 are opened parallel and equally spaced on the lower surfaces of both ends of the mounting frame 9. The axial cross-section of the multiple sets of buffer grooves 8 is a convex structure, and the upper end of the buffer rod 10 is adapted to the size of the buffer groove 8. At the same time, a set of elastic elements is sleeved on the upper end of the buffer rod 10, and a set of elastic elements is provided on the upper surface of the buffer rod 10.

[0024] In this embodiment, as Figure 2 and Figure 3 Two sets of elastic elements are symmetrically arranged at the upper and lower ends of the buffer groove 8, so that the mounting frame 9 and the buffer rod 10 can automatically reset after relative movement occurs, thereby helping to enhance the vibration effect of the mounting frame 9 and the filter screen 7.

[0025] In a preferred embodiment, the buffer rod 10 has an overall cylindrical structure, the axial section of the buffer rod 10 has a T-shaped structure, and the fixed frame 11 fixedly connected to the lower end of the buffer rod 10 has a U-shaped structure. At the same time, the two sides of the fixed frame 11 are fixedly connected to the two sides of the inner cavity of the processing box 1, and the outer side dimensions of the fixed frame 11 and the mounting frame 9 are compatible.

[0026] In this embodiment, as Figure 2 and Figure 3 The upper end of the buffer rod 10 is matched with the size of the buffer groove 8, which helps to enhance the stability of the relative sliding between the buffer rod 10 and the mounting frame 9. The upper extension of the buffer rod 10 is located between the two sets of elastic elements, which facilitates the vibration of the mounting frame 9 and the filter screen 7. At the same time, the size setting of the outer side of the fixed frame 11 and the mounting frame 9 can help to enhance the sealing of the connection between the mounting frame 9 and the inner side of the processing box 1.

[0027] In a preferred embodiment, multiple sets of fixing plates 12 are fixedly connected in parallel and at equal intervals within the inner cavity of the fixing frame 11. All sets of fixing plates 12 are rectangular in structure, and the fixing frame 11 and fixing plates 12 are combined to form a U-shaped structure. Meanwhile, three sets of main slide grooves 17 are opened in parallel and at equal intervals on both sides of the fixing plate 12 along the length direction, and the main slide grooves 17 are rectangular in structure.

[0028] In this embodiment, as Figure 2 , Figure 3 and Figure 4 The main sliding grooves 17 symmetrically opened on both sides of the fixed plate 12 can help enhance the stability of the relative sliding between the fixed plate 12 and the moving plate 13. In addition, the setting of the fixed plate 12 can also help enhance the overall structural strength of the fixed frame 11.

[0029] In a preferred embodiment, the movable plate 13 has a square structure. The two end faces of the movable plate 13 abut against the sides of two adjacent sets of fixed plates 12, and the main slider fixedly connected to the end face of the movable plate 13 is slidably connected in the main slide groove 17. The cleaning brushes 20 fixedly connected to the upper surfaces of the movable plate 13 and the fixed plates 12 abut against the lower surface of the filter screen 7.

[0030] In this embodiment, as Figure 2 , Figure 3 and Figure 4 The cleaning brush 20 is made of stiff bristles, and the bristles on the upper surface of the cleaning brush 20 can pass smoothly through the mesh of the filter screen 7 that has moved down due to vibration, thereby achieving the automatic cleaning effect of the filter screen 7 in the filter assembly 3.

[0031] In a preferred embodiment, the three sets of movable plates 13 on the same side of the fixed plate 12 are all fixedly connected to the same set of main fixing rods 14. The main fixing rods 14 are elongated, and the lower surface of the main fixing rods 14 is fixedly connected to the secondary fixing rods 15. The secondary fixing rods 15 are elongated, and the secondary fixing rods 15 are slidably connected to the lower surface of the fixed plate 12. At the same time, the main fixing rods 14 and the secondary fixing rods 15 are combined to form a king-shaped structure.

[0032] In this embodiment, as Figure 2 , Figure 3 and Figure 4 The main fixing rod 14 and the auxiliary fixing rod 15 enable a set of electric rods 16 to synchronously push multiple sets of moving plates 13 to move back and forth periodically, so that the position of the cleaning brush 20 on the upper surface of the moving plate 13 can change, thereby helping to improve the cleaning effect of the cleaning brush 20 on the surface of the filter screen 7.

Claims

1. A flowback fluid treatment device for oilfield well completion, comprising: Filter component (3), the inside of the processing box (1) is provided with a liquid inlet component (2), a filter component (3), a screening and conveying component (4), an adsorption component (5) and a crushing component (6) respectively. It is characterized in that: the filter component (3) is composed of a mounting frame (9), a buffer rod (10), a fixed frame (11) and a fixed plate (12). The upper end of the inner cavity of the mounting frame (9) is fixedly connected with a filter net (7). The lower end of the inner cavity of the mounting frame (9) is fixedly connected with a vibrator (18) through a main cross plate (19). Buffer grooves (8) are symmetrically opened on the lower surfaces of both ends of the mounting frame (9). The upper end of the buffer rod (10) is slidably connected in the buffer groove (8) through an elastic element. The lower end of the buffer rod (10) is fixedly connected with the fixed frame (11). The inner cavity of the fixed frame (11) is symmetrically connected with the fixed plate (12). Main sliding grooves (17) are symmetrically opened on both sides of the fixed plate (12). The two ends of the moving plate (13) are correspondingly connected with main sliders at positions corresponding to the main sliding grooves (17). At the same time, a main fixed rod (14) is fixedly connected to the lower surface of the moving plate (13). The lower surface of the main fixed rod (14) is fixedly connected with a secondary fixed rod (15). An electric rod (16) is fixedly connected to the lower surface of the fixed plate (12). The telescopic rod of the electric rod (16) is fixedly connected with the secondary fixed rod (15). Cleaning brushes (20) are fixedly connected to the upper surfaces of both the fixed plate (12) and the moving plate (13).

2. The oilfield well completion flowback fluid treatment equipment according to claim 1, characterized in that, The mounting frame (9) has a rectangular structure. The filter net (7) fixedly connected to the inner cavity of the mounting frame (9) has a square structure. The upper surfaces of the mounting frame (9) and the filter net (7) are in the same plane. At the same time, the main cross plate (19) fixedly connected to the lower end of the inner cavity of the mounting frame (9) has a rectangular structure.

3. The oilfield well completion flowback fluid treatment equipment according to claim 1, characterized in that, Multiple groups of buffer grooves (8) are respectively opened on the lower surfaces of both ends of the mounting frame (9) in parallel and at equal intervals. The axial cross-sections of the multiple groups of buffer grooves (8) are all convex-shaped structures. The upper end of the buffer rod (10) and the size of the buffer groove (8) are adapted. At the same time, a set of elastic elements is sleeved on the upper end of the buffer rod (10). A set of elastic elements is arranged on the upper surface of the buffer rod (10).

4. The oilfield well completion flowback fluid treatment equipment according to claim 1, characterized in that, The buffer rod (10) has an overall cylindrical structure. The axial cross-section of the buffer rod (10) is a T-shaped structure. The fixed frame (11) fixedly connected to the lower end of the buffer rod (10) has a rectangular structure. At the same time, both sides of the fixed frame (11) are fixedly connected to both sides of the inner cavity of the processing box (1). The outer side dimensions of the fixed frame (11) and the mounting frame (9) are adapted.

5. The oilfield well completion flowback fluid treatment equipment according to claim 1, characterized in that, Multiple groups of fixed plates (12) are fixedly connected in parallel and at equal intervals in the inner cavity of the fixed frame (11). The multiple groups of fixed plates (12) are all rectangular structures. The fixed frame (11) and the fixed plates (12) are combined to form a rectangular structure. At the same time, three groups of main sliding grooves (17) are respectively opened on both sides of the fixed plate (12) in parallel and at equal intervals along the length direction. The main sliding grooves (17) have a rectangular structure.

6. The oilfield well completion flowback fluid treatment equipment according to claim 1, characterized in that, The movable plate (13) has a square structure. The two end faces of the movable plate (13) abut against the sides of two adjacent fixed plates (12), and the main slider fixedly connected to the end face of the movable plate (13) is slidably connected in the main slide groove (17). The cleaning brush (20) fixedly connected to the upper surface of the movable plate (13) and the fixed plate (12) abut against the lower surface of the filter screen (7).

7. The oilfield well completion flowback fluid treatment equipment according to claim 1, characterized in that, The three sets of movable plates (13) on the same side of the fixed plate (12) are all fixedly connected to the same set of main fixed rods (14). The main fixed rods (14) are long strips, and the lower surface of the main fixed rods (14) is fixedly connected to the secondary fixed rods (15). The secondary fixed rods (15) are long strips, and the secondary fixed rods (15) are slidably connected to the lower surface of the fixed plate (12). At the same time, the main fixed rods (14) and the secondary fixed rods (15) are combined together to form a king-shaped structure.

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