Quantitative slickwater and guar fracturing flowback fluid treatment device

Abstract

The application relates to a quantitative slick water and guar gum fracturing flowback fluid treatment device, which comprises a mixing treatment tank, a conduit and a quantitative control device. The quantitative control device comprises, in sequence, a float, a connecting rod, a driving column and a clamping member, and further comprises a valve member. The clamping member comprises a shell, a fixed block, two clamping claws and a spring member. The driving column is connected to the upper portion of the fixed block. The lower portion of the clamping claw is movably connected to the lower portion of the fixed block through a fixing component. The elastic member is fixedly connected between the middle portions of the two clamping claws. The fixed block can slide up and down in the shell. The clamping claw clamps the valve member when the fixed block descends. The clamping claw releases the valve member when the fixed block ascends. The clamping claw is in a sickle-shaped structure. The upper end and the lower end of the clamping claw are both in arc-shaped structures. The device can realize small flow, large flow and small flow of the treatment liquid, can accurately control the flow of the treatment liquid, and can improve the quantitative flow of the flow.

Description

Technical Field

[0001] This application relates to a flowback fluid treatment device, and more particularly to a device for treating flowback fluid from fracturing of slickwater and guar gum. Background Technology

[0002] Currently, hydraulic fracturing is one of the main measures for increasing the production of oil and gas resources, unconventional coalbed methane, and shale gas. Although it can effectively improve the conductivity of fractures, it also generates a large amount of fracturing flowback fluid, which contains a large amount of chemicals and suspended solids, making it highly polluting and requiring treatment. Existing treatment methods are not very controllable and are difficult to implement.

[0003] Fracturing flowback fluids generally include guar gum systems, deep coal seam systems, slickwater systems, and polyacrylamide systems, among others. The treatment equipment varies slightly depending on the type. Existing flowback fluid treatment equipment is diverse, such as CN106315934A, and is quite complex. It typically involves large treatment containers, making quantitative treatment generally impossible, resulting in low treatment efficiency and limited controllability. Some require manual valve closure, indicating low automation. Others require high-power valves controlled by circuits, but this is energy-intensive, time-consuming, and labor-intensive, with limited controllability and occasional malfunctions leading to losses. High reliability, adjustability, and automated quantitative control are not achievable. Furthermore, fracturing flowback fluid treatment generally requires multiple processes to bring the wastewater to a satisfactory level, and the connections and controls between the various reactors are not sufficiently automated, hindering quantitative control and other requirements. Summary of the Invention

[0004] This application provides a quantitative treatment device for slickwater and guar gum fracturing flowback fluid, which can achieve highly reliable, adjustable and automatic quantitative control for the treatment of fracturing flowback fluid. A quantitative treatment device for slickwater and guar gum fracturing flowback fluid includes a mixing tank, a conduit, and a quantitative control device. The mixing tank, through which the flowback fluid exits, can be used for coagulation and sedimentation treatment of the fracturing flowback fluid. The mixing tank is connected to the quantitative control device via the conduit. The quantitative control device includes a float, a connecting rod, a drive column, and a clamping component connected in sequence, and also includes a valve component located at the outlet end of the conduit. The float is located inside the mixing tank, and a support rod is provided at the top of the mixing tank to support the connecting rod. The fracturing flowback fluid drives the float to move up and down, which in turn drives the drive column to move up and down via the connecting rod. The drive column drives the clamping component to move up and down, clamping and releasing the valve component. This allows for automatic quantitative control of the flowback fluid entering the mixing tank and automatic control of the treated fluid's outflow, eliminating the need for manual handling and solenoid valves. The clamping component includes a housing, a fixing block, two grippers, and a spring component. The top of the housing has a tapered through-hole. The drive column passes through the through-hole through the top of the housing and is connected to the fixing block. The lower part of each gripper is movably connected to the lower part of the fixing block via a fixing component. An elastic component is fixedly connected between the middle parts of the two grippers. The fixing block can slide up and down within the housing. The grippers clamp the valve component as the fixing block descends, and release the valve component as the fixing block rises. The grippers have a sickle-shaped structure, with both the upper and lower ends being arc-shaped. This facilitates the lower end of the gripper clamping the valve column and allows the upper end of the gripper to be inserted into the tapered hole, enabling the clamping and release of the valve column. The tapered hole is wider at the bottom than the top.

[0005] Furthermore, the valve component includes a valve stem and a valve body. The valve stem is disposed at the top of the valve body, and a through groove is horizontally opened in the middle of the valve body. It also includes a valve stem, which is vertically inserted into the valve body. One end of the valve stem protrudes from the valve body, and the other end is inserted into the valve body and connected to a spring. A through hole two for a low-power solenoid valve is provided in the middle of the valve stem. A timer is provided at one end of the valve stem. The timer controls the opening and closing of the low-power solenoid valve. When the valve stem is squeezed by the gripper, it can squeeze the spring and trigger the timer, causing the through hole two of the low-power solenoid valve to move down to the corresponding position of the through groove. When the timer reaches the user-set time, it controls the low-power solenoid valve to open the through hole two, making the through groove open. The preferred valve stem is located at the front of the valve body, which enables a small flow rate of the treated liquid. It has a simple and controllable structure. The selection of a timer allows for setting the timer according to the required processing time of the treated liquid, thereby controlling the opening and closing of the low-power solenoid valve to achieve a small flow rate. In addition, the use of a low-power solenoid valve for control requires less power than traditional high-power solenoid valves, saving energy, reducing costs, and having a mature technology. There are a variety of high-quality low-power solenoid valves available in the existing technology, offering high controllability.

[0006] Furthermore, it also includes a second valve stem, which is connected to the upper end of the fixed block via a connecting member. When the fixed block descends, it pulls the connecting member, causing the second valve stem to rise. When the fixed block rises, it releases the connecting member, and the second valve stem descends under gravity, thereby reducing the diameter of the conduit. Preferably, the second valve stem is located behind the valve body to achieve a small flow rate of the treated liquid.

[0007] Furthermore, the mixing tank is provided with several dosing ports and liquid inlets on its top.

[0008] Furthermore, a scraper and a sediment outlet are provided at the bottom of the mixing tank, and a stirring component can also be provided inside the mixing tank to improve the mixing speed.

[0009] Furthermore, the contact surface between the bottom of the gripper and the valve stem is an arc-shaped surface, preferably including an inclined arc-shaped surface. The upper edge of the valve stem is also an arc-shaped surface. The upper lateral dimension of the valve stem is larger than the lower lateral dimension of the valve stem. This allows the gripper to slide down the upper edge arc-shaped surface of the valve stem when it contacts the valve stem, thereby opening the bottom of the two grippers. When the gripper moves to the lower part of the valve stem, the two grippers will be clamped due to the action of the gripper elastic component, forming a clamping of the upper part of the valve stem, thus achieving the function of automatically clamping the valve stem.

[0010] Furthermore, one end of the float is inserted into the mixing tank, and the other end extends out of the top of the mixing tank, which facilitates the rise and fall of the float.

[0011] Furthermore, the float has a hollow interior, allowing for the addition of weights to adjust its weight. This allows for quantitative control by adjusting the float's weight according to the concentration of different treatment solutions. It also enables the treatment solution to separate into layers; adjusting the float's weight based on the concentration of the separated layers allows for the appropriate flow of those layers. A vertical observation window can also be installed on the side wall of the mixing tank to observe the layering of the treatment solution, facilitating monitoring of the control device.

[0012] Furthermore, the top of the drive column is provided with multiple connection holes for movably connecting with the connecting rod, which facilitates the adjustment of the position of the float in the mixing tank, quantitatively controlling the inflow of different amounts of return liquid to meet different needs and improve controllability.

[0013] Furthermore, the combined weight of the float and the second valve stem is greater than the combined weight of the valve component, the gripper, the fixing block, the drive column, and the elastic component. In the initial state, the top of the gripper extends into the tapered through hole at the top of the housing due to the pulling force of the float and the second valve stem, causing the lower end of the gripper to open.

[0014] Furthermore, it includes multiple interconnected processing devices. The outlet of the first processing device is connected to the inlet of the second processing device, and the outlet of the second processing device is connected to the inlet of the third processing device. Sensors are installed above and below the mixing tank of the first processing device to detect the liquid level and control the opening and closing of the inlet to achieve quantitative control.

[0015] The apparatus of this application may include multiple interconnected processing devices. The outlet of the first processing device is connected to the inlet of the second processing device, and the outlet of the second processing device is connected to the inlet of the third processing device. Sensors are installed above and below the mixing tank of the first processing device to detect the liquid level and control the opening and closing of the inlet, achieving a first quantitative liquid inlet control. Subsequent processing devices may not have control valves at their inlets; control can be achieved through a quantitative control device between the processing devices. Only one control valve and a quantitative control device with a specific structure are needed to process the flowback fluid. This application can automatically control the flow of the processing fluid between the processing devices, offering high reliability, eliminating the need for manual operation and high-power solenoid valves, and enabling quantitative control. It can quantitatively introduce the processing fluid, initially controlling a small flow rate to avoid the impact of a large flow rate, then controlling a large flow rate through the valve body to accelerate the outflow rate, and finally controlling a small flow rate through the valve stem to precisely control the outflow of the processing fluid and improve the quantitative outflow. The mixing tank can be used for coagulation and sedimentation treatment in slickwater and guar gum fracturing flowback fluid treatment devices, and can also be a component for other fracturing flowback fluid treatment. The top and bottom of the grippers are both arc-shaped, facilitating gripping and release, reducing impact on other components, improving the lifespan and reliability of the device, and preventing jamming. The contact surface between the bottom of the grippers and the valve column is arc-shaped, preferably including an inclined arc-shaped surface. The upper edge of the valve column is also arc-shaped, with the upper lateral dimension of the valve column being larger than the lower lateral dimension. This allows the grippers to slide down the arc-shaped surface of the upper edge of the valve column when the bottom of the grippers contacts the valve column, thus opening the bottom of the two grippers. When the grippers move to the lower part of the valve column, the elastic components of the grippers clamp the two grippers, forming a clamping effect on the upper part of the valve column, achieving automatic clamping of the valve column. The top of the drive column is provided with multiple connection holes for movable connection with the connecting rod, facilitating adjustment of the position of the float in the mixing tank, quantitatively controlling the inflow of different amounts of return liquid to meet different needs and improve controllability. A small-power solenoid valve has a through-hole 2 in the middle of the valve stem. A timer is installed at one end of the valve stem, and the timer controls the opening and closing of the small-power solenoid valve. When the valve stem is squeezed by the gripper, it can compress the spring and trigger the timer, causing the through-hole 2 of the small-power solenoid valve to move down to the corresponding position of the through groove. When the timer reaches the user-set time, it controls the small-power solenoid valve to open the through-hole 2, making the through groove open. Preferably, the valve stem is located at the front of the valve body, which can realize a small flow rate of the treated liquid. The structure is simple and controllable. The timer can be set according to the processing time requirements of the treated liquid, thereby controlling the opening and closing of the small-power solenoid valve to achieve a small flow rate. In addition, the use of a small-power solenoid valve for control requires less power than traditional high-power solenoid valves, saving energy and effort, reducing costs, and the technology is relatively mature. There are many high-quality small-power solenoid valves available in the prior art, which have high controllability and can automatically control the processing time of the treated liquid.

[0016] Furthermore, the float has a hollow interior, allowing for the addition of weights to adjust its weight. This allows for quantitative control by adjusting the float's weight according to the concentration of different treatment solutions. An observation window can also be vertically installed on the side wall of the mixing tank. As the treatment solution separates into layers, the float's weight is adjusted based on the corresponding concentration of each layer, and the outflow of the respective layer is observed through the window. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the quantitative slickwater and guar gum fracturing flowback fluid treatment device of this application.

[0018] Figure 2 This is a schematic diagram of the specific structure of the quantitative slickwater and guar gum fracturing flowback fluid treatment device of this application.

[0019] Figure 3 This is a schematic diagram showing the different stages of the quantitative slickwater and guar gum fracturing flowback fluid treatment device of this application.

[0020] Figure 4 This is a schematic diagram of the valve structure at different stages of the processing device of this application.

[0021] Figure 5 This is a schematic diagram of the contact surface between the gripper and the valve body in this application.

[0022] Figure 6 This is a schematic diagram of the structure of valve stem 2 in this application. Detailed Implementation

[0023] The following specific embodiments are used to further illustrate the methods described in this application, but this application is not limited to these embodiments. The application will now be described in further detail with reference to the accompanying drawings.

[0024] Example

[0025] like Figure 1-6As shown, a quantitative slickwater and guar gum fracturing flowback fluid treatment device includes multiple interconnected treatment devices. The outlet of the first treatment device a is connected to the inlet of the second treatment device b, and the outlet of the second treatment device b is connected to the inlet of the third treatment device c. Sensors 25 and 26 are installed above and below the mixing tank of the first treatment device a to detect the liquid level and control the opening and closing of the inlets. The first sensor 25, located on the upper side, closes the control valve (not shown, a commonly used control valve in the prior art) of the inlet 2 of the first treatment device when it detects that the liquid level has reached a certain position, stopping the injection. The second sensor 26, also located on the upper side, opens the control valve (not shown, a commonly used control valve in the prior art) of the inlet 2 of the first treatment device when it detects that the liquid level has reached a certain position, allowing injection to proceed, thus achieving quantitative control of the first treatment device. The inlets 2 of subsequent treatment devices may not have control valves; they can be controlled by a quantitative control device between the treatment devices. Only one control valve and a quantitative control device with a specific structure are needed to treat the flowback fluid.

[0026] The system includes a mixing tank 1, a conduit 017, and a metering control device. The mixing tank 1 is used for the coagulation and sedimentation treatment of fracturing flowback fluid, and the mixing tank 1 flows out through the conduit 017. The mixing tank 1 is connected to the metering control device through the conduit 017. The metering control device includes a float 4, a connecting rod 10, a drive column 11, and a clamping component connected in sequence, and also includes a valve component located at the outlet end of the conduit 017. A support rod 9 is provided on the top of the coagulation and sedimentation treatment tank 1, which is used to movably support the connecting rod 10. The float 4 is located inside the mixing tank 1, wherein the float 4 and the... The connecting rod 10 is movably connected by the fixing member 8. Preferably, the distance between the connecting rod 10 and the fixing member 8 is smaller than the distance between the connecting rod 10 and the driving column 11, so as to more advantageously drive the driving column 11 to move by controlling the movement of the float 4. The fracturing flowback fluid drives the float 4 to move up and down, which in turn drives the driving column 11 to move up and down via the connecting rod 10. The driving column 11 drives the clamping member to move up and down and clamps and releases the valve member. This enables automatic quantitative control of the flowback fluid into the mixing tank and automatic control of the automatic outflow of the treated fluid, without the need for manual handling and traditional high-power solenoid valves.

[0027] The clamping component includes a housing 12, a fixing block 13, two grippers 16, and a spring component 14. The top of the housing 12 is provided with a tapered through hole, which is smaller at the top and larger at the bottom. The drive column 11 passes through the through hole through the top of the housing 12 and is connected to the fixing block 13. The lower part of the gripper 16 is movably connected to the lower part of the fixing block 13 via a fixing component 15. An elastic component 14 is fixedly connected between the middle parts of the two grippers 16. The fixing block 13 can slide up and down within the housing 12. The grippers 16 clamp the valve component as the fixing block 13 descends, and release the valve component as the fixing block 13 rises. The gripper 16 has a sickle-shaped structure, with both the upper and lower ends of the gripper 16 having arc-shaped surfaces. This facilitates the lower end of the gripper to contact the upper part of the valve stem and open the gripper to hold the valve stem. It also facilitates the upper end of the gripper to squeeze into the conical hole to achieve the gripping and release of the valve stem. The conical hole has a shape that is smaller at the top and larger at the bottom. Preferably, a wear-resistant layer, such as polytetrafluoroethylene, is provided on the contact surface between the upper part of the gripper 16 and the conical hole, and on the contact surface between the lower part of the gripper 16 and the valve stem 19.

[0028] The valve component includes a valve stem 19 and a valve body 20. The valve stem 19 is located at the top of the valve body 20, and a through groove 21 is horizontally opened in the middle of the valve body 20. It also includes a valve stem 22, which is vertically inserted into the valve body 20. One end of the valve stem 22 protrudes from the valve body 20, and the other end is inserted into the valve body 20 and connected to a spring 24. A through hole 23 for a low-power solenoid valve is provided in the middle of the valve stem 22. A timer (not shown) is provided at one end of the valve stem 22. The timer controls the opening and closing of the low-power solenoid valve. When the valve stem 22 is squeezed by the gripper 16, it can squeeze the spring 24 and trigger the timer, causing the through hole 23 of the low-power solenoid valve to move down to the corresponding position of the through groove 21. When the timer reaches the user-set time, it controls the low-power solenoid valve to open the through hole 23, making the through groove 21 open. The preferred valve stem 22 is located at the front of the valve body, which enables a small flow rate of the treated liquid. It has a simple and controllable structure. The selection of a timer allows for setting the timer according to the processing time requirements of the treated liquid, thereby controlling the opening and closing of the low-power solenoid valve to achieve a small flow rate. In addition, the selection of a low-power solenoid valve for control requires less power than traditional high-power solenoid valves, saving energy, reducing costs, and having a mature technology. There are a variety of high-quality low-power solenoid valves available in the existing technology, which have high controllability, can achieve a small flow rate of the treated liquid, and have a simple and controllable structure.

[0029] It also includes a second valve stem 18, which is connected to the upper end of the fixed block 13 via a connecting member 17. When the fixed block 13 descends, it pulls the connecting member 17. The length of the connecting member 17 can be adjusted as needed. The connecting member 17 includes a pull rope 17-2 that passes through a pulley component 17-1 fixed in the housing 12. The inside of the right side of the housing 12 is a cavity. When the fixed block slides down, it tightens the connecting member 17, causing the second valve stem 18 to rise. When the fixed block 13 rises, it releases the pull rope 17-2, and the second valve stem 18 descends by gravity, thereby reducing the diameter of the conduit 017. Preferably, the second valve stem is located behind the valve body to achieve a small flow rate of the treated liquid.

[0030] The bottom of the gripper 16 contacts the valve stem 19 with an arc-shaped surface, preferably including an inclined arc-shaped surface. The upper edge of the valve stem 19 is also an arc-shaped surface. The upper lateral dimension of the valve stem 19 is larger than the lower lateral dimension of the valve stem 19. This allows the gripper 16 to slide down along the upper edge arc-shaped surface of the valve stem 19 when its bottom contacts the valve stem 19, thereby opening the bottom of the two grippers 16. When the gripper 16 moves to the lower part of the valve stem 19, the two grippers 16 will be clamped due to the action of the elastic component of the gripper 16, forming a clamping of the upper part of the valve stem 19, thus realizing the function of automatically clamping the valve stem 19.

[0031] The mixing tank 1 is provided with several dosing ports 3 and liquid inlets 2 at the top, and a scraper 6 and a sediment outlet 7 at the bottom. A stirring component can also be provided inside the mixing tank to improve the mixing speed.

[0032] The bottom of the gripper 16 contacts the valve stem 19 on an arc-shaped surface, which facilitates the bottom of the gripper 16 to open and hold the top of the valve stem 19.

[0033] One end of the float 4 is inserted into the mixing tank 1, and the other end extends out of the top of the mixing tank 1, which facilitates the rise and fall of the float.

[0034] The float 4 has a hollow cavity inside, and weights can be added to adjust its weight. The weight of the float can be adjusted according to the concentration of different treatment liquids to achieve quantitative control. It can also cause the treatment liquid to separate into layers. The weight of the float can be adjusted according to the corresponding concentration of the layered liquids to achieve the outflow of the corresponding layered liquids.

[0035] An observation window (not shown) can also be vertically installed on the side wall of the mixing tank to observe the stratified liquid.

[0036] The top of the drive column 11 is provided with multiple connection holes for movably connecting with the connecting rod 10. This facilitates adjustment of the position of the float in the mixing tank, quantitatively controlling the inflow of different amounts of return liquid to meet various needs and improve controllability.

[0037] The combined weight of the float 4 and the valve stem 18 is greater than the combined weight of the valve component, the gripper 16, the fixing block 13, the drive column 11, and the elastic component 14. In the initial state, the top of the gripper 16 extends into the tapered through hole at the top of the housing 12 due to the pulling force of the float 4 and the valve stem 18, causing the lower end of the gripper 16 to open.

[0038] The processing method of the quantitative slickwater and guar gum fracturing flowback fluid treatment device of this application is as follows: Adjust each treatment device to process the fracturing flowback fluid through the first, second, and third treatment devices respectively. The inlet flow rate of the first treatment device is determined by setting the position of the liquid level sensor, and the opening and closing of the inlet is controlled based on the sensor's detection. Subsequent treatment device adjustments: Adjust the mass of the float 4 according to the concentration of the fracturing flowback fluid, and adjust the relative position between the connecting rod 10 and the drive column 11 according to the amount to be controlled in the mixing tank 1. After adjustment, the fracturing flowback fluid flows into the mixing tank 1 through the inlet 2, and the chemical is added to the mixing tank 1 through the dosing port 3. As the liquid level of the fracturing flowback fluid in the mixing tank 1 rises, the float 4 rises continuously, driving one end of the connecting rod 10 to rise. Due to the action of the support rod 9, the other end of the connecting rod 10 descends continuously, driving the drive column 11 to descend, causing the fixed block 13 to drive the gripper 16 to slide down. The connecting member 17 is tightened, and the valve stem 18 is pulled up. When the gripper 16 slides down to the top of the valve column 19, the lower end of the gripper 16 will open and squeeze the valve stem 22 because the contact surface between the gripper 16 and the valve column 19 is an arc surface. When the valve stem 22 is squeezed by the gripper 16, it can squeeze the spring 24 and trigger the timer, so that the through hole 23 of the low-power solenoid valve moves down to the corresponding position of the through groove 21. When the timer reaches the user-set time, it controls the low-power solenoid valve to open the through hole 23, so that the through groove 21 is open. As the through hole 23 on valve stem 22 moves downward, the gripper 16 clamps the top of valve column 19; when the through groove 21 is opened, the treatment liquid in the mixing tank 1 flows out slowly, causing the liquid level to drop, which in turn causes the float 4 to drop, thereby raising the drive column 11, which in turn causes the fixing block 13 and the gripper 16 to lift the valve column 19; the valve body 20 is slowly lifted, increasing the flow rate of the treatment liquid; the rise of the fixing block 13 will release the connecting part 17, and the valve stem 18 will descend by gravity, thereby reducing the conduit 0. The guide diameter of 17 reduces the flow rate; when the gripper 16 rises to the top of the housing 12, the top of the two grippers 16 will be squeezed due to the arc-shaped contact surface between the top of the gripper 16 and the tapered hole at the top of the housing 12, which will cause the lower end of the gripper 16 to release the valve column 19. The valve column 19 and the valve body 20 will fall by gravity, thereby closing the conduit 017; a quantitative introduction of the treatment liquid is achieved. At first, the valve rod 1 22 controls the small flow rate of the treatment liquid, then the valve body 20 controls the large flow rate of the treatment liquid, and finally the valve rod 2 18 controls the small flow rate.

[0039] The apparatus of this application may include multiple interconnected processing devices. The outlet of the first processing device is connected to the inlet of the second processing device, and the outlet of the second processing device is connected to the inlet of the third processing device. Sensors are installed above and below the mixing tank of the first processing device to detect the liquid level and control the opening and closing of the inlet, achieving initial quantitative liquid inlet control. Subsequent processing devices can be controlled by a quantitative control device. It features high reliability, requires no manual intervention, and uses high-power solenoid valves, enabling quantitative control. It can achieve quantitative introduction of the processing liquid. Initially, valve stem one controls a small flow rate of the processing liquid to avoid the impact of a large flow rate. Then, the valve body controls a large flow rate of the processing liquid to accelerate the outflow rate. Finally, valve stem two controls a small flow rate, precisely controlling the outflow of the processing liquid and improving the quantitative outflow. The top and bottom of the grippers are both arc-shaped, facilitating gripping and release, reducing impact on other components, improving the lifespan and reliability of the device, and preventing jamming. The contact surface between the bottom of the grippers and the valve column is arc-shaped, preferably including an inclined arc-shaped surface. The upper edge of the valve column is also arc-shaped, with the upper lateral dimension of the valve column being larger than the lower lateral dimension. This allows the grippers to slide down the arc-shaped surface of the upper edge of the valve column when the bottom of the grippers contacts the valve column, thus opening the bottom of the two grippers. When the grippers move to the lower part of the valve column, the elastic components of the grippers clamp the two grippers, forming a clamping effect on the upper part of the valve column, achieving automatic clamping of the valve column. The top of the drive column is provided with multiple connection holes for movable connection with the connecting rod, facilitating adjustment of the position of the float in the mixing tank, quantitatively controlling the inflow of different amounts of return liquid to meet different needs and improve controllability. Furthermore, the float has a hollow interior, allowing for the addition of weights to adjust its weight. This allows for quantitative control by adjusting the float's weight according to the concentration of different treatment solutions. It can also cause the treatment solution to separate into layers; adjusting the float's weight based on the concentration of the separated layers allows for the appropriate layer to flow out. A vertical observation window can also be installed on the side wall of the mixing tank to observe the layering of the treatment solution.

[0040] The above description is merely a preferred embodiment of this application and does not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application using the disclosed methods and techniques, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this application. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of protection of the technical solution of this application.

Claims

1. A device for treating quantitative slickwater and guar gum fracturing flowback fluid, characterized in that: The system includes a mixing tank (1), a conduit (017), and a metering control device. The mixing tank (1) is connected to the metering control device via the conduit (017). The metering control device includes a float (4), a connecting rod (10), a drive column (11), and a clamping component connected in sequence, and also includes a valve component disposed at the outlet end of the conduit (017). The float (4) is located inside the mixing tank (1). The fracturing flowback fluid drives the float (4) to move up and down, which in turn drives the drive column (11) to move up and down via the connecting rod (10). The drive column (11) drives the clamping component to move up and down and clamps and releases the valve component. The clamping component includes a housing (12). The housing (12) consists of a fixed block (13), two grippers (16), and a spring member (14). The drive column (11) is connected to the upper part of the fixed block (13). The lower part of the grippers (16) is movably connected to the lower part of the fixed block (13) via a fixing member (15). An elastic member (14) is fixedly connected between the middle parts of the two grippers (16). The fixed block (13) can slide up and down within the housing (12). The grippers (16) clamp the valve member as the fixed block (13) descends, and release the valve member as the fixed block (13) rises. The grippers (16) have a sickle-shaped structure, and both the upper and lower ends of the grippers (16) are arc-shaped. The valve component includes a valve stem (19) and a valve body (20). The valve stem (19) is located at the top of the valve body (20), and a through groove (21) is horizontally opened in the middle of the valve body (20). It also includes a valve stem (22), which is vertically inserted into the valve body (20). One end of the valve stem (22) protrudes from the valve body (20), and the other end is inserted into the valve body (20) and connected to a spring (24). A low-power solenoid valve is provided in the middle of the valve stem (22). The through hole 2 (23) is provided with a timer at one end of the valve stem 1 (22). The timer controls the opening and closing of the low-power solenoid valve. When the valve stem 1 (22) is squeezed by the gripper (16), it can squeeze the spring (24) and trigger the timer, causing the through hole 2 (23) of the low-power solenoid valve to move down to the corresponding position of the through groove (21). When the timer reaches the user-set time, it controls the low-power solenoid valve to open the through hole 2 (23), making the through groove (21) open. It also includes a second valve stem (18), which is connected to the upper end of the fixed block (13) via a connecting member (17); when the fixed block (13) descends, it pulls the connecting member (17) and drives the second valve stem (18) to rise; when the fixed block (13) rises, it releases the connecting member (17), and the second valve stem (18) descends by gravity, thereby reducing the diameter of the conduit (017); The bottom of the gripper (16) and the contact surface with the valve stem (19) are arc-shaped, which makes it easy for the bottom of the gripper (16) to open and hold the top of the valve stem (19).

2. The device for treating quantitative slickwater and guar gum fracturing flowback fluid according to claim 1, characterized in that: The mixing tank (1) is provided with several dosing ports (3) and liquid inlets (2) on the top, and a scraper (6) and a sediment outlet (7) are provided on the bottom.

3. The device for treating quantitative slickwater and guar gum fracturing flowback fluid according to claim 1, characterized in that: One end of the float (4) is inserted into the mixing tank (1), and the other end extends out of the top of the mixing tank (1).

4. The device for treating quantitative slickwater and guar gum fracturing flowback fluid according to claim 1, characterized in that: The float (4) has a hollow cavity inside, and weights can be added to adjust its weight.

5. The device for treating quantitative slickwater and guar gum fracturing flowback fluid according to claim 1, characterized in that: The top of the drive column (11) is provided with multiple connection holes for movably connecting with the connecting rod (10).

6. The device for treating quantitative slickwater and guar gum fracturing flowback fluid according to claim 1, characterized in that: The combined weight of the float (4) and the valve stem (18) is greater than the combined weight of the valve component, the gripper (16), the fixing block (13), the drive column (11), and the elastic component (14). In the initial state, the top of the gripper (16) extends into the tapered through hole at the top of the housing (12) due to the pulling force of the float (4) and the valve stem (18), causing the lower end of the gripper (16) to open.

7. The device for treating quantitative slickwater and guar gum fracturing flowback fluid according to claim 1, characterized in that: An observation window is vertically installed on the side wall of the mixing tank (1).

Images