Purification treatment device and method for well drilling waste hydraulic filtrate

Abstract

According to the purification treatment device and method for the well drilling waste hydraulic filtrate, in the device, an output shaft of a conveying motor is connected with an impeller to drive the impeller to convey the well drilling waste hydraulic filtrate to a first pipeline, and the well drilling waste hydraulic filtrate enters a stirring cavity through a second pipeline and forms a rotational flow state under operation of a stirring motor to achieve stirring treatment; and the purification cavity is formed in the other side, opposite to the stirring cavity, of the first pipeline in a communicating mode, the purification cavity comprises at least one filter plate, and the filter plate is transversely arranged in the purification cavity to filter the drilling waste hydraulic filtrate. According to the device, the purification treatment performance of the waste hydraulic filtrate is improved, and the recycling and up-to-standard emission of the drilling fluid are ensured.

Description

Technical Field

[0001] This invention relates to the field of drilling waste fluid treatment technology, and in particular to a purification treatment device and method for drilling waste hydraulic fluid. Background Technology

[0002] In the drilling process of oil and gas, a large amount of drilling fluid is used to achieve the following purposes: (1) Cooling and lubricating the drill bit: The drill bit generates high temperature during continuous friction with the rock formation. Drilling fluid can cool the drill bit, reduce wear, and provide lubrication so that it can drill more smoothly. For example, in deep well drilling, the drill bit is prone to overheating and damage due to the high formation temperature. Sufficient drilling fluid circulation can effectively reduce the temperature. (2) Carrying cuttings: After the drill bit breaks the rock, the resulting cuttings need to be carried out of the wellhead in time. Drilling fluid can suspend these cuttings and carry them to the surface during circulation. (3) Balancing formation pressure: Preventing wellbore collapse and formation fluid inflow into the well, and maintaining stable well pressure. When drilling encounters high-pressure formations, if the density and pressure of the drilling fluid cannot balance the formation pressure, dangerous situations such as blowouts may occur. (4) Stabilizing the wellbore: Preventing wellbore collapse and maintaining wellbore stability. Especially in geologically complex strata, such as loose sand layers and easily expandable clay layers, drilling fluid can form a protective film to support the well wall.

[0003] After drilling fluid completes its function, it mixes with rock cuttings, formation water, and other impurities, forming drilling waste fluid. Drilling waste fluid filtrate is the liquid portion obtained after pressure filtration of the drilling waste fluid. During the treatment of drilling waste fluid, the solids and liquids are separated through pressure filtration, and the resulting liquid is the filtrate. Drilling waste fluid filtrate also possesses a certain degree of complexity and contamination. It may still contain some incompletely separated fine particles, dissolved organic and inorganic matter, and residual chemical additives.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of the present invention, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a purification device and method for drilling waste hydraulic fluid, which improves the purification performance of the hydraulic fluid by switching the flow path of the hydraulic fluid during the transportation process.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A purification and treatment device for drilling waste hydraulic fluid according to the present invention includes:

[0008] The container holds the drilling waste hydraulic fluid.

[0009] The first conduit connects to the container.

[0010] A conveyor motor, whose output shaft is connected to an impeller to drive the impeller to convey the drilling waste hydraulic fluid to the first pipeline.

[0011] A first control valve is provided in the first pipeline to open or close the first pipeline.

[0012] The second pipeline is connected to and perpendicular to the first pipeline at the top of the first pipeline.

[0013] A stirring chamber, which is connected to one side of the first pipeline, includes...

[0014] Agitator motor,

[0015] A stirring rod, which is connected to the output shaft of the stirring motor to rotate via the stirring motor.

[0016] Multiple stirring blades are vertically spaced on the stirring rod. The drilling waste hydraulic fluid enters the stirring chamber through a second pipeline and forms a swirling flow under the operation of the stirring motor to achieve stirring treatment. This ensures that impurities in the drilling waste hydraulic fluid are fully stirred and separated under centrifugal force.

[0017] A second control valve is located between the second pipeline and the stirring chamber to open or close the flow path between the second pipeline and the stirring chamber.

[0018] A purification chamber, connected in communication with the first pipeline on the other side opposite to the stirring chamber, includes at least one filter plate arranged laterally within the purification chamber to filter drilling waste hydraulic fluid.

[0019] A third control valve is located between the second pipeline and the purification chamber to open or close the flow path between the second pipeline and the purification chamber.

[0020] In the purification and treatment device for drilling waste hydraulic fluid, the stirring chamber is connected to the container.

[0021] In the purification and treatment device for drilling waste hydraulic fluid, the drilling waste hydraulic fluid includes water-based drilling fluid, oil-based drilling fluid, and synthetic-based drilling fluid.

[0022] In the purification and treatment device for drilling waste hydraulic fluid, the stirring chamber is provided with a centrifugal layer for separating impurities.

[0023] In the purification and treatment device for drilling waste hydraulic fluid, the centrifugal layer includes horizontal separation holes that taper away from the stirring rod.

[0024] In the purification and treatment device for drilling waste hydraulic fluid, the multi-layer filter plates are arranged sequentially in the filtration direction and the diameter of the filter holes decreases sequentially.

[0025] In the purification and treatment device for drilling waste hydraulic fluid, the speed of the conveying motor is greater than the speed of the stirring motor.

[0026] In the purification treatment device for drilling waste hydraulic fluid, the first speed of the conveying motor when the second control valve opens the flow path between the second pipeline and the stirring chamber is less than the second speed of the conveying motor when the third control valve opens the flow path between the second pipeline and the purification chamber.

[0027] The treatment methods for purification and treatment devices used for drilling waste hydraulic fluid include,

[0028] During the first time period, the drive motor operates at a first speed, driving the impeller to rotate. The drilling waste hydraulic filtrate is transported along the first pipeline under the rotation of the impeller. This drives the first control valve to be open, the second control valve to be open, and the third control valve to be closed, allowing the drilling waste hydraulic filtrate to enter the mixing chamber and be agitated by the operation of the mixing motor. This agitates impurities in the drilling waste hydraulic filtrate and separates them under centrifugal force.

[0029] During the second time period, the second control valve is closed and the third control valve is opened, and the conveying motor operates at the second speed, thereby causing the drilling waste hydraulic fluid to enter the purification chamber for filtration and stopping the conveying to the mixing chamber. The drilling waste hydraulic fluid is filtered by the filter plate installed in the purification chamber to prevent impurities from contaminating or clogging the purification chamber.

[0030] In the method described, during the third time period following the second time period, the stirring motor stops operating and drives the first control valve to be in the open state, the second control valve to be in the closed state, and the third control valve to be in the open state. Thus, during the third time period, the stirring motor stops operating, allowing impurities to settle in the stirring chamber after centrifugation. At the same time, the first and second control valves remain open, allowing the drilling waste hydraulic fluid to enter the purification chamber through the first and second pipelines and be filtered by the filter plate.

[0031] This invention's filtration equipment can process various types of drilling fluids, including water-based, oil-based, and synthetic-based drilling fluids. For example, in deep and ultra-deep well drilling, the properties of the drilling fluid change due to extreme conditions such as high temperature and pressure, resulting in more impurities and waste. In such cases, the filtration equipment plays a crucial role in ensuring the recycling and compliant discharge of the drilling fluid, improving the purification performance of waste hydraulic fluid filtrate, and demonstrating broad development and application prospects. During the first time period, the conveying motor is driven to transport the filtrate from the first pipeline, and the first control valve, the second control valve, and the third control valve are driven to open. This allows the filtrate to enter the stirring chamber and be stirred by the stirring motor, ensuring that impurities in the filtrate are fully stirred and separated by centrifugation. During the second time period, the second control valve is driven to close and the third control valve is driven to open, allowing the filtrate to enter the purification chamber for filtration and stopping its transport to the stirring chamber. The filtrate is then effectively filtered by a filter plate installed in the purification chamber to prevent the filtrate from directly entering the purification chamber and causing contamination or blockage. This purification method can effectively classify and purify the filtrate transported at different stages, improving the purification performance of waste hydraulic filtrate. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0033] Figure 1 This is a schematic diagram of a purification and treatment device for drilling waste hydraulic fluid, provided in one embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] Conveyor motor 11, stirring motor 12, stirring rod 13, stirring blade 14, first pipeline 21, second pipeline 22, stirring chamber 31, purification chamber 32, filter plate 321, first control valve 41, second control valve 42, and third control valve 43. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0044] See Figure 1 As shown, in one embodiment, a purification and treatment device for drilling waste hydraulic fluid according to the present invention includes,

[0045] The container holds the drilling waste hydraulic fluid.

[0046] The first conduit 21 connects to the container.

[0047] A conveyor motor 11, whose output shaft is connected to an impeller to drive the impeller to convey the drilling waste hydraulic fluid to the first pipeline 21.

[0048] A first control valve 41 is provided in the first pipeline 21 to open or close the first pipeline 21.

[0049] The second pipe 22 is connected to the top of the first pipe 21 and is perpendicular to the first pipe 21.

[0050] A stirring chamber 31 is connected to one side of the first pipeline 21, and the stirring chamber 31 includes...

[0051] 12 stirring motors

[0052] A stirring rod 13 is connected to the output shaft of the stirring motor 12 and is driven to rotate by the stirring motor 12.

[0053] Multiple stirring blades 14 are vertically spaced on the stirring rod 13. The drilling waste hydraulic fluid enters the stirring chamber 31 through the second pipeline 22 and forms a swirling state under the operation of the stirring motor 12 to achieve stirring treatment. This allows the impurities in the drilling waste hydraulic fluid to be fully stirred and separated under centrifugal action.

[0054] The second control valve 42 is located between the second pipeline 22 and the stirring chamber 31 to open or close the flow path between the second pipeline 22 and the stirring chamber 31.

[0055] A purification chamber 32 is connected in communication with the first pipeline 21 on the other side opposite to the stirring chamber 31. The purification chamber 32 includes at least one filter plate 321, which is laterally disposed within the purification chamber 32 to filter drilling waste hydraulic fluid.

[0056] The third control valve 43 is located between the second pipeline 22 and the purification chamber 32 to open or close the flow path between the second pipeline 22 and the purification chamber 32.

[0057] In a preferred embodiment of the purification and treatment device for drilling waste hydraulic fluid, the stirring chamber 31 is connected to the container.

[0058] In a preferred embodiment of the purification and treatment device for drilling waste hydraulic fluid, the drilling waste hydraulic fluid includes water-based drilling fluid, oil-based drilling fluid, and synthetic-based drilling fluid.

[0059] In a preferred embodiment of the purification treatment device for drilling waste hydraulic fluid, the stirring chamber 31 is provided with a centrifugal layer for separating impurities.

[0060] In a preferred embodiment of the purification treatment device for drilling waste hydraulic fluid, the centrifugal layer includes horizontal separation holes that taper away from the stirring rod 13.

[0061] In a preferred embodiment of the purification treatment device for drilling waste hydraulic fluid, the multi-layer filter plates 321 are arranged sequentially in the filtration direction and the diameter of the filter holes decreases sequentially.

[0062] In a preferred embodiment of the purification treatment device for drilling waste hydraulic fluid, the rotational speed of the conveying motor 11 is greater than the rotational speed of the stirring motor 12.

[0063] In a preferred embodiment of the purification treatment device for drilling waste hydraulic fluid, the first rotational speed of the conveying motor 11 when the second control valve 42 opens the flow path between the second pipeline 22 and the stirring chamber 31 is less than the second rotational speed of the conveying motor 11 when the third control valve 43 opens the flow path between the second pipeline 22 and the purification chamber 32.

[0064] A method for purifying and treating drilling waste hydraulic fluid includes,

[0065] During the first time period, the drive conveyor motor 11 operates at a first speed, driving the impeller to rotate. The drilling waste hydraulic filtrate is conveyed along the first pipeline 21 under the rotation of the impeller. This drives the first control valve 41 to the open state, the second control valve 42 to the open state, and the third control valve 43 to the closed state, allowing the drilling waste hydraulic filtrate to enter the stirring chamber 31 and be stirred under the operation of the stirring motor 12. This stirs the impurities in the drilling waste hydraulic filtrate and separates them under centrifugal force.

[0066] During the second time period, the second control valve 42 is closed and the third control valve 43 is opened, and the conveying motor 11 operates at the second speed, thereby causing the drilling waste hydraulic fluid to enter the purification chamber 32 for filtration and stopping the conveying to the stirring chamber 31. The drilling waste hydraulic fluid is filtered by the filter plate 321 installed in the purification chamber 32, preventing impurities from contaminating or clogging the purification chamber 32.

[0067] In a preferred embodiment of the method, during a third time period following the second time period, the stirring motor 12 stops operating and drives the first control valve 41 to be in the open state, the second control valve 42 to be in the closed state, and the third control valve 43 to be in the open state. Thus, during the third time period, the stirring motor 12 stops operating, allowing impurities to settle in the stirring chamber 31 after centrifugation. At the same time, the first control valve 41 and the second control valve 42 remain open, so that the drilling waste hydraulic fluid enters the purification chamber 32 through the first pipeline 21 and the second pipeline 22 and is filtered by the filter plate 321.

[0068] In one embodiment, the conveying motor 11 is driven to operate at a first speed during a first time period. The purification equipment for the purification treatment method of drilling waste hydraulic fluid provided in this application includes the conveying motor 11. The output shaft of the conveying motor 11 is connected to an impeller. The impeller rotates under the drive of the conveying motor 11 and drives the filtrate to be conveyed along the first pipeline 21. The end of the first pipeline 21 is connected to the second pipeline 22. The second pipeline 22 is arranged perpendicular to the first pipeline 21 and its two ends are respectively connected to the stirring chamber 31 and the purification chamber 32. The filter plate 321 is arranged in the purification chamber 32.

[0069] Specifically, the conveying motor 11 drives the impeller to rotate, and the filter liquid is conveyed along the first pipeline 21 under the action of the impeller rotation and the conveying pipeline. The first pipeline 21 is the main pipeline. The first control valve 41 is installed on the first pipeline 21, and the first pipeline 21 is opened or closed under the control of the first control valve 41.

[0070] At the top end of the first pipe 21, a second pipe 22 is connected. The second pipe 22 is perpendicular to the first pipe 21 and is interconnected with it. The two ends of the second pipe 22 are respectively connected to the stirring chamber 31 and the purification chamber 32. A second control valve 42 is located on the second pipe 22 near the stirring chamber 31, and a third control valve 43 is located on the second pipe 22 near the purification chamber 32.

[0071] The second control valve 42 is used to control the opening or closing of the port of the second pipeline 22 facing the stirring chamber 31, thereby realizing the on / off control of the delivery of the filtrate along the second pipeline 22 into the stirring chamber 31. The third control valve 43 is used to control the opening or closing of the port of the second pipeline 22 facing the purification chamber 32, thereby realizing the on / off control of the delivery of the filtrate along the second pipeline 22 into the purification chamber 32.

[0072] In one embodiment, a method for purifying drilling waste hydraulic fluid includes:

[0073] During the first time period, the conveying motor 11 is driven to operate at a first speed. The purification treatment equipment provided in this application for the purification treatment method of drilling waste hydraulic fluid includes a conveying motor 11. The output shaft of the conveying motor 11 is connected to an impeller. The impeller rotates under the drive of the conveying motor 11 and drives the filtrate to be conveyed along the first pipeline 21. The end of the first pipeline 21 is connected to a second pipeline 22. The second pipeline 22 is arranged perpendicular to the first pipeline 21 and its two ends are respectively connected to the stirring chamber 31 and the purification chamber 32. The filter plate 321 is arranged in the purification chamber 32.

[0074] Specifically, the conveying motor 11 drives the impeller to rotate, and the filter liquid is conveyed along the first pipeline 21 under the action of the impeller rotation and the conveying pipeline. The first pipeline 21 is the main pipeline. The first control valve 41 is installed on the first pipeline 21, and the first pipeline 21 is opened or closed under the control of the first control valve 41.

[0075] At the top end of the first pipe 21, a second pipe 22 is connected. The second pipe 22 is perpendicular to the first pipe 21 and is interconnected with it. The two ends of the second pipe 22 are respectively connected to the stirring chamber 31 and the purification chamber 32. A second control valve 42 is located on the second pipe 22 near the stirring chamber 31, and a third control valve 43 is located on the second pipe 22 near the purification chamber 32.

[0076] The second control valve 42 is used to control the opening or closing of the port of the second pipeline 22 facing the stirring chamber 31, thereby realizing the on / off control of the delivery of the filtrate along the second pipeline 22 into the stirring chamber 31. The third control valve 43 is used to control the opening or closing of the port of the second pipeline 22 facing the purification chamber 32, thereby realizing the on / off control of the delivery of the filtrate along the second pipeline 22 into the purification chamber 32.

[0077] During the first time period, the first control valve 41 is driven to be in the open state, the second control valve 42 is driven to be in the open state, and the third control valve 43 is driven to be in the closed state. During the first time period, the stirring motor 12 is driven to operate. The output shaft of the stirring motor 12 is connected to the stirring rod 13. The stirring rod 13 is equipped with stirring blades 14. The operating speed of the conveying motor 11 is greater than the speed of the stirring motor 12. Multiple stirring blades 14 are arranged vertically at intervals on the stirring rod 13.

[0078] In the technical solution provided in this application, considering that in the initial stage of the operation of the drive conveyor motor 11, some impurities or foreign objects may form deposits in the front section, or impurities or foreign objects may remain in the first pipeline 21 or the second pipeline 22, in order to prevent the filter plate 321 in the purification chamber 32 from being directly purified in the initial stage, the second control valve 42 is opened and the third control valve 43 is closed, so that the filter liquid enters the stirring chamber 31 and is stirred under the operation of the stirring motor 12, so that the impurities in the filter liquid are fully stirred and separated under centrifugal action. The rotation of the stirring blade 14 causes the filter liquid contained in the stirring chamber 31 to form a swirling state and be centrifugally separated.

[0079] During the second time period following the first time period, the first control valve 41 is driven to be in the open state, the second control valve 42 is in the closed state and the third control valve 43 is in the open state, and the conveying motor 11 is driven to operate at a second speed, which is greater than the first speed, thereby increasing the conveying flow rate of the filter liquid during the second time period.

[0080] During the second time period, the second control valve 42 is closed and the third control valve 43 is opened, thereby allowing the filtrate to enter the purification chamber 32 for filtration and stopping its delivery to the stirring chamber 31. This ensures that the filtrate after the initial stage of filtrate delivery is effectively filtered by the filter plate 321 installed in the purification chamber 32, preventing the filtrate from directly entering the purification chamber 32 and causing contamination or blockage.

[0081] Therefore, by controlling the opening or closing states of the second control valve 42 and the third control valve 43, the conveying process of the filtrate is divided into a first stage and a second stage from the perspective of timing control. Considering that a lot of impurities or foreign matter will be introduced during the conveying process in the first stage, the filtrate in the first stage is directly fed into the stirring chamber 31 for stirring and centrifugation, and in the subsequent second stage, the filtrate is stopped from being conveyed into the stirring chamber 31 and enters the purification chamber 32 for purification treatment.

[0082] Specifically, the opening degree of the first control valve 41 in the first time period is greater than that in the second time period. Therefore, under the action of the smaller opening degree of the first control valve 41, the filtrate can be transported at a higher flow rate after passing through the first control valve 41 in the second stage. This higher flow rate impacts the inner wall of the first or second pipe, and when the second control valve 42 is closed, it further impacts the inner wall of the pipe and the filter plate 321 in the purification chamber 32 at a higher flow rate, thereby further improving the filtration performance of the filtrate in the second time period.

[0083] Specifically, the opening degree of the third control valve 43 in the second time period is greater than that in the third time period. As a result, under the action of the smaller opening degree of the third control valve 43, the filter liquid can be transported at a higher flow rate after passing through the third control valve 43 in the second stage. The higher flow rate can achieve the impact on the inner wall of the second pipeline near the purification chamber 32 and the filter plate 321 in the purification chamber 32.

[0084] During the third time period following the second time period, the stirring motor 12 stops operating, and the first control valve 41 is in the open state, the second control valve 42 is in the closed state, and the third control valve 43 is in the open state. Thus, during this third time period, the stirring motor 12 stops operating, causing the stirring rod 13 and the stirring blades 14 to stop rotating. This allows impurities, after centrifugation, to settle within the stirring chamber 31, thereby achieving effective filtration of impurities or foreign matter. Simultaneously, the first control valve 41 and the second control valve 42 remain open, allowing the filtrate to enter the purification chamber 32 via the first pipe 21 and the second pipe 22, where it is effectively filtered by the filter plate 321.

[0085] Finally, it should be noted that the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0086] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A purification and treatment device for drilling waste hydraulic fluid, characterized in that, It includes, The container holds the drilling waste hydraulic fluid. The first conduit connects to the container. A conveyor motor, whose output shaft is connected to an impeller to drive the impeller to convey the drilling waste hydraulic fluid to the first pipeline. A first control valve is provided in the first pipeline to open or close the first pipeline. The second pipeline is connected to and perpendicular to the first pipeline at the top of the first pipeline. A stirring chamber, which is connected to one side of the first pipeline, includes... Agitator motor, A stirring rod, which is connected to the output shaft of the stirring motor to rotate via the stirring motor. Multiple stirring blades are vertically spaced on the stirring rod. The drilling waste hydraulic fluid enters the stirring chamber through a second pipeline and forms a swirling flow under the operation of the stirring motor to achieve stirring treatment. This ensures that impurities in the drilling waste hydraulic fluid are fully stirred and separated under centrifugal force. A second control valve is located between the second pipeline and the stirring chamber to open or close the flow path between the second pipeline and the stirring chamber. A purification chamber, connected in communication with the first pipeline on the other side opposite to the stirring chamber, includes at least one filter plate arranged laterally within the purification chamber to filter drilling waste hydraulic fluid. A third control valve is located between the second pipeline and the purification chamber to open or close the flow path between the second pipeline and the purification chamber.

2. The purification and treatment device for drilling waste hydraulic fluid according to claim 1, characterized in that, The stirring chamber is connected to the container.

3. The purification and treatment device for drilling waste hydraulic fluid according to claim 1, characterized in that, The drilling waste hydraulic fluid includes water-based drilling fluid, oil-based drilling fluid, and synthetic-based drilling fluid.

4. The purification and treatment device for drilling waste hydraulic fluid according to claim 1, characterized in that, The stirring chamber is equipped with a centrifugal layer for separating impurities.

5. A purification and treatment device for drilling waste hydraulic fluid according to claim 4, characterized in that, The centrifugal layer includes horizontal separation holes that taper away from the stirring rod.

6. A purification and treatment device for drilling waste hydraulic fluid according to claim 1, characterized in that, The multi-layer filter plates are arranged sequentially in the filtration direction and the diameter of the filter holes decreases sequentially.

7. A purification and treatment device for drilling waste hydraulic fluid according to claim 1, characterized in that, The conveyor motor has a higher speed than the mixing motor.

8. A purification and treatment device for drilling waste hydraulic fluid according to claim 1, characterized in that, The first rotational speed of the conveyor motor when the second control valve opens the flow path between the second pipeline and the mixing chamber is less than the second rotational speed of the conveyor motor when the third control valve opens the flow path between the second pipeline and the purification chamber.

9. A treatment method using the purification and treatment device for drilling waste hydraulic fluid according to any one of claims 1-8, characterized in that, It includes, During the first time period, the drive motor operates at a first speed, driving the impeller to rotate. The drilling waste hydraulic filtrate is transported along the first pipeline under the rotation of the impeller. This drives the first control valve to be open, the second control valve to be open, and the third control valve to be closed, allowing the drilling waste hydraulic filtrate to enter the mixing chamber and be agitated by the operation of the mixing motor. This agitates impurities in the drilling waste hydraulic filtrate and separates them under centrifugal force. During the second time period, the second control valve is closed and the third control valve is opened, and the conveying motor operates at the second speed, thereby causing the drilling waste hydraulic fluid to enter the purification chamber for filtration and stopping the conveying to the mixing chamber. The drilling waste hydraulic fluid is filtered by the filter plate installed in the purification chamber to prevent impurities from contaminating or clogging the purification chamber.

10. The method as described in claim 9, characterized in that, During the third time period following the second time period, the stirring motor stops operating and drives the first control valve to the open state, the second control valve to the closed state, and the third control valve to the open state. Thus, during the third time period, the stirring motor stops operating, allowing impurities to settle in the stirring chamber after centrifugation. At the same time, the first and second control valves remain open, allowing the drilling waste hydraulic fluid to enter the purification chamber through the first and second pipelines and be filtered by the filter plate.

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