Segmented self-cleaning mud shunt solid control system and shunt solid control method

Abstract

The application discloses a sectional self-cleaning mud shunt solid control system, which comprises a front section liquid inlet unit, the front section liquid inlet unit is connected with a rear section liquid inlet unit through a plurality of first flexible transition joint pipes 8, the bottom of the front section liquid inlet unit and the bottom of the rear section liquid inlet unit are both connected with a sand setting tank 5 through pipelines, the first flexible transition joint pipes 8 are parallel to each other, the top of the front section liquid inlet unit and the top of the rear section liquid inlet unit are connected with an exhaust unit, the rear section liquid inlet unit is connected with a plurality of second flexible transition joint pipes 11, the other end of each second flexible transition joint pipe 11 is connected with a vibrating screen 6, and the application further comprises a PLC control unit. The application also discloses a method for shunt solid control by using the device. The application solves the problems that the mud shunt groove is prone to retaining sundries and toxic and harmful gas escaping and the like. The two-stage sectional design plays the operation mode of cabin sectioning, automatic cleaning and sludge transmission whole process.

Description

Technical Field

[0001] This invention relates to the field of drilling fluid solids control equipment technology, specifically to a segmented self-cleaning mud diversion solids control system. This invention also relates to a method for diversion solids control using the above-mentioned segmented self-cleaning mud diversion solids control system. Background Technology

[0002] In drilling fluid solids control circulation systems, after entering the formation from the drill pipe, the drilling fluid carries cuttings back to the casing. Drilling fluid mixed with a large amount of cuttings and mud returns from the casing annulus and enters a vibrating screen for primary screening via the return pipe. Before screening, the inlet section usually has a mud diversion trough that is integrated with the vibrating screen or configured separately to facilitate the transition and buffering of the mud before it enters the vibrating screen. The design concept is to allow the mud to settle once and then enter the vibrating screen evenly after the liquid level rises, making the screening process more thorough and reasonable. If the amount of sand and mud carried by the mud is too high when the cuttings return, some solids control systems may even need to be equipped with an independent mud scraper to reduce the impurity content of the mud entering the screening process.

[0003] Due to the special nature of mud media and its different properties at various well depths, such as water-based, oil-based, and different densities, conventional mud diversion channels will gradually solidify and accumulate impurities during use, requiring constant cleaning by personnel. This is unfriendly to operators and the working environment. Some improved diversion channels have not been able to meet the self-cleaning requirements. Therefore, it is necessary to consider designing a new diversion channel that can adapt to the new requirements and improve the above problems.

[0004] Existing mud diversion tanks, besides their single-function drawback, are prone to accumulating large amounts of mud, sand, or impurities rapidly at the bottom during use. This necessitates manual scraping using a bottom valve, reducing on-site work efficiency and increasing labor intensity. Furthermore, during the return and recirculation processes, the high return rate of these open-type diversion tanks can easily cause overflows. If the returned mud carries high concentrations of toxic gases, the open recirculation distribution tank can lead to significant gas leakage before the first screening process, posing a significant threat to the environmental pollution and personnel safety of on-site operations. This is especially true in highly enclosed environments like offshore platforms, where the gradual accumulation of escaped gases poses a considerable operational risk, particularly for flammable media such as H2S. Summary of the Invention

[0005] The purpose of this invention is to provide a segmented self-cleaning mud diversion solids control system, which solves the problem of existing mud diversion tanks easily accumulating debris.

[0006] Another object of the present invention is to provide a method for solids control using the above-described segmented self-cleaning mud diversion solids control system.

[0007] The first technical solution adopted in this invention is: a segmented self-cleaning mud diversion solids control system, including a front-end liquid inlet unit, which is connected to a rear-end liquid inlet unit through several first flexible transition pipes. The bottom of the front-end liquid inlet unit and the bottom of the rear-end liquid inlet unit are both connected to a sedimentation tank through pipes. Each first flexible transition pipe is parallel to each other. The top of the front-end liquid inlet unit and the rear-end liquid inlet unit are connected to an exhaust unit. The rear-end liquid inlet unit is connected to several second flexible transition pipes. The other end of each second flexible transition pipe is connected to a vibrating screen. The system also includes a PLC control unit.

[0008] The first technical solution of this invention is further characterized by: The front-end liquid inlet unit includes a front-end liquid inlet chamber. The top surface of the front-end liquid inlet chamber is rectangular, and the bottom surface is funnel-shaped. First support legs are fixed to the four corners of the bottom surface of the front-end liquid inlet chamber. A first weighing sensor is fixed to the bottom of each first support leg. The other side of each first weighing sensor is in contact with the ground. A first slide valve is connected to the bottom surface of the front-end liquid inlet chamber through a flange. The other end of the first slide valve is connected to the inlet of the screw conveyor through a flange. The outlet of the screw conveyor is connected to the screw conveyor slide valve. The other end of the screw conveyor slide valve is connected to the sedimentation tank through a pipe. A mud return pipe is connected to the side of the front-end liquid inlet chamber. An impact baffle is fixed to the inner cavity of the front-end liquid inlet chamber. The impact baffle is positioned corresponding to the mud return pipe.

[0009] The downstream liquid inlet unit includes a downstream liquid inlet chamber. The top surface of the downstream liquid inlet chamber is rectangular, and the bottom surface is funnel-shaped. Second support legs are fixed at the four corners of the bottom surface of the downstream liquid inlet chamber. A second weighing sensor is fixed at the bottom of each second support leg. The other side of each second weighing sensor is in contact with the ground. A second slide valve is connected to the bottom surface of the downstream liquid inlet chamber through a flange. The other end of the second slide valve is connected to the sedimentation tank through a pipe. Several vibrators are evenly arranged on the bottom surface of the downstream liquid inlet chamber.

[0010] The second support leg includes a fixed support leg. One end of the fixed support leg is fixedly connected to the bottom surface of the rear liquid inlet chamber. The other end of the fixed support leg is fixedly connected to a telescopic rod. The other end of the telescopic rod is slidably connected to a sliding hole leg. A spring is sleeved on the telescopic rod. The spring is located between the fixed support leg and the sliding hole leg. A second weighing sensor is fixedly connected to the bottom of the sliding hole leg.

[0011] The height of the second flexible transition tube is greater than the height of the first flexible transition tube.

[0012] The exhaust unit includes a three-way pipe. The first inlet of the three-way pipe passes through the top surface of the front liquid inlet chamber and communicates with the inner cavity of the front liquid inlet chamber. The second inlet of the three-way pipe passes through the top surface of the rear liquid inlet chamber and communicates with the inner cavity of the rear liquid inlet chamber. An exhaust fan is provided at the outlet of the three-way pipe.

[0013] The PLC control unit includes a PLC control system, which is connected to the first slide gate valve, the slide gate valve with the screw conveyor, the second slide gate valve, the screw conveyor, the first weighing sensor, and the second weighing sensor via signal lines.

[0014] The second technical solution adopted in this invention is a method for controlling solids flow using a segmented self-cleaning mud diversion solids control system, which specifically includes the following steps: S1. Close the first gate valve. The mud enters the front inlet chamber for impact diversion. The escaping gas is discharged through the exhaust unit. The mud then enters the rear inlet chamber and is diverted to the corresponding vibrating screen for vibration treatment through multiple second flexible transition pipes. S2. When the sedimentation impurities at the bottom of the current inlet chamber accumulate to exceed the limit weight threshold, the first gate valve is opened by the PLC control system, and the impurities at the bottom fall down quickly. The screw conveyor starts running before the first gate valve is opened to remove the impurities that have fallen from the bottom.

[0015] The beneficial effects of this invention are: The segmented self-cleaning sludge diversion solids control system of this invention is designed to prevent gas escape, with effective sealing and gas discharge features. This addresses the risks of sludge diversion tanks accumulating debris and releasing toxic and harmful gases. Its two-stage segmented design enables a complete operational process including compartmentalized sections, automatic cleaning, and sludge transfer.

[0016] When the mud from the mud return pipe carries a large amount of impurities and mud lumps, it first enters the front inlet chamber for simple impact diversion, escaping gas and allowing impurities to settle at the bottom. When the accumulated weight exceeds the limit threshold, a signal from the PLC control system opens the first bottom gate valve, causing the impurities to fall quickly. The screw conveyor starts operating before the first gate valve opens, clearing the bottom impurities in a short time and then closing the first gate valve. The returned mud continues to enter the front inlet chamber and then transitions to the rear inlet chamber before entering the vibrating screen for processing. The closed structure design allows gas to be discharged in time, and the vibrating screen processes relatively clean mud media, improving processing efficiency.

[0017] The specific characteristics are as follows: 1. The closed design allows for timely extraction and discharge of escaping gas, effectively reducing gas pollution; 2. The segmented structural design, with two transition mud sections at the front and rear, ensures uniform liquid injection. 3. Self-cleaning design: The bottom sludge of the front and rear liquid inlet chambers is removed in time to ensure clean mud. 4. Weighing-based sensing, adaptive sludge treatment, adjustable density and weight ratio, adaptable to various working conditions or sludge systems. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the segmented self-cleaning mud diversion solids control system of the present invention; Figure 2 This is a bottom-view structural diagram of the present invention; Figure 3 for Figure 2 Sectional view of section BB; Figure 4 for Figure 2 Sectional view of section AA; Figure 5 for Figure 1 A magnified view of a section at point I.

[0019] In the diagram, 1. Front inlet chamber, 2. First slide gate valve, 3. First load cell, 4. Screw conveyor, 5. Sedimentation chamber, 6. Vibrating screen, 7. Rear inlet chamber, 8. First flexible transition section, 9. Exhaust fan, 10. Impact baffle, 11. Second flexible transition section, 12. Second support leg, 13. Vibrator, 14. Screw conveyor slide gate valve, 15. Second slide gate valve, 16. Second load cell. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown, this invention provides a segmented self-cleaning mud diversion solids control system, including a front-end inlet chamber 1. An impact baffle 10 is installed inside the front-end inlet chamber 1. When the mud returning from the mud return pipe enters, it first collides with the impact baffle 10, allowing some harmful gases contained in the mud to escape quickly. The front-end inlet chamber 1 has a small volume design, meeting the requirements for short-time processing of returned mud, with a small amount of mud falling and a high impurity removal rate. The front-end inlet chamber 1 integrates a first gate valve 2 and a screw conveyor 4, and is equipped with a first support leg. Weighing is detected by a weighing sensor 3 at the bottom of the first support leg. The principle is that when the returned mud contains a large amount of mud lumps, impurity particles, or rock... During the process of cleaning or after a period of use, a large amount of sediment accumulates at the bottom of the front inlet chamber 1, which needs to be cleaned in time. Its total mass is higher than the total weight of conventional drilling fluid. The weight change of this chamber is set in the PLC system, and the total weight calculated by multiplying the density and volume of conventional drilling fluid is used as the basis. When the weight exceeds 1.5 times the set value or the deviation multiple determined on site, the first gate valve 2 is opened. The opening time of the gate valve 2 is set to several seconds or a specific time. At the same time, the screw conveyor 4 is started to process the heavy mud blocks and mud impurities returned from the mud return pipe in a short time. These impurities are discharged into the sedimentation chamber 5 at the bottom of the vibrating screen 6 for sedimentation.

[0022] like Figure 1-3As shown, the front inlet chamber 1 and the rear inlet chamber 7 are connected by a first flexible transition pipe 8 to ensure that the front inlet chamber 1 can display and send signals in a timely and accurate manner when gravity changes. The mud that has settled once in the front inlet chamber 1 re-enters the rear inlet chamber 7 and flows back to the vibrating screen for processing. The height of the second flexible transition pipe 11 is greater than the height of the first flexible transition pipe 8 to ensure that the mud entering the vibrating screen 6 is homogeneous, so that the processing effect of the vibrating screen 6 can reach the optimal level. The front inlet chamber 1 and the rear inlet chamber 7 adopt a closed design, and an exhaust fan 9 is installed on the top. During operation, it can extract and process the impact or escape of harmful gases. On land drilling rigs, it can generally be extracted to a safe area, while on offshore platforms, it is set to be discharged outside the cabin.

[0023] like Figure 1 , Figure 2 and Figure 4 As shown, the segmented diversion system, by setting different numbers of second flexible transition pipes 11, can be applied to scenarios with multiple vibrating screen combinations. The first slide gate valve 2 matched with the front liquid inlet 1 is a conventional large-size model. Compared with other types of valves, the slide gate valve is more suitable for use in mud or solid-liquid mixed media. The pneumatic first slide gate valve 2 can be opened and closed quickly. With the screw conveyor 4, it can transport mud impurities to a specific area, replacing equipment such as scrapers used to treat mud containing mud lumps and other impurities. In environments with high reflux rates, several sets of similar slide gate valves 2 can be set to quickly discharge impurities, while also increasing the volume of the front liquid inlet 1.

[0024] The rear inlet chamber 7 and the vibrating screen 6 are connected by a second flexible transition pipe 11. The bottom surface of the rear inlet chamber 7 is provided with a second support leg 12, and it is subjected to excitation treatment by the exciter 13 under set conditions. When the excitation starts, the second slide valve 15 is in the open state. The set condition is specifically defined as when the second weighing sensor 16 detects that its mud mass (referring to the situation where the mud is flowing normally and the liquid level is maintained at the same height as the inlet of the vibrating screen) is higher than 1.5 times the normal volume or a specific set value, then the exciter 13 is turned on and the second slide valve 15 is turned on at the same time, and it stops after a delay of about 10 seconds or the set value.

[0025] like Figure 4 As shown, the bottom conical surface of the liquid inlet 7 of the rear section flows to ensure that the sludge can be quickly discharged under the conditions of vibration and normal sedimentation, and to prevent excessive waste of mud.

[0026] A weighing comparison system is set up, which, together with a PLC control unit, controls the opening and closing of the first gate valve 2, the screw conveyor gate valve 14, and the second gate valve 15, and performs integrated control with the screw conveyor 4. After the sedimented impurities reach a certain value, they are discharged quantitatively to keep the front inlet chamber 1 clean. The parameters can be set for mud media of different densities to obtain the setting value most suitable for the current mud circulation, so that the front inlet chamber 1 and the rear inlet chamber 7 are self-cleaning and self-adaptive. This not only handles sludge impurities in a timely manner, but also avoids excessive opening and closing, which would waste the circulating medium. Ultimately, the mud in the front inlet chamber 1 and the rear inlet chamber 7 contains basically only suspended particles, achieving the effect of sludge removal in one go.

[0027] Since the front inlet chamber 1 processes lumpy sludge or large-particle impurities, the screw conveyor 4 is the preferred option. The vibrator 13 is the preferred option after the front inlet chamber 1 processes the impurities, after a period of settling, when enough impurities have settled and the vibration cleaning has kept the bottom or sidewalls of the rear inlet chamber 7 free from solidification. The two work together to maintain the flow environment of the diversion channel, ensuring the continuity and efficiency of the medium processed by the vibrating screen 6 on site, and improving the overall mud circulation system.

[0028] An exhaust fan 9 is installed to quickly vent the gas escaping from the mud during the flow process, preventing operators from being harmed by the gas and ensuring safe operation in confined environments such as offshore platforms.

[0029] When the mud from the mud return pipe carries a large amount of impurities and mud lumps, it first enters the front inlet chamber 1 for simple impact diversion, gas escapes, and impurities settle at the bottom. When the accumulated amount exceeds the limited weight threshold, the PLC control unit sends a signal to open the bottom first gate valve 2, and the bottom impurities fall quickly. The screw conveyor 4 starts operating before the first gate valve 2 opens, clearing the bottom impurities in a short time, and then closes the first gate valve 2. The returned mud continues to enter the front inlet chamber 1 and then transitions to the rear inlet chamber 7 before entering the vibrating screen 6 for processing. The closed structure design allows gas to be discharged in time, and the vibrating screen processes relatively clean mud media, improving processing efficiency.

[0030] The segmented self-cleaning mud diversion solids control system of this invention adopts a front-end inlet chamber and a rear-end inlet chamber to perform secondary diversion of mud from the return pipe during the drilling process. The front-end inlet chamber is designed with a small volume. When the mud returning from the return pipe enters, it first collides with the impact plate set inside, so that some harmful gases contained in the mud can be quickly released. The front-end inlet chamber integrates a gate valve and a short-pitch screw conveyor, and is equipped with a support and the weighing sensor at the bottom of the support is used for detection.

[0031] Example 1 like Figure 1As shown, the segmented self-cleaning mud diversion solids control system proposed in this embodiment includes a front-end liquid inlet unit, which is connected to a rear-end liquid inlet unit through several first flexible transition pipes 8. The bottom of the front-end liquid inlet unit and the bottom of the rear-end liquid inlet unit are both connected to a sedimentation tank 5 through pipes. Each first flexible transition pipe 8 is parallel to each other. The top of the front-end liquid inlet unit and the rear-end liquid inlet unit are connected to an exhaust unit. The rear-end liquid inlet unit is connected to several second flexible transition pipes 11. The other end of each second flexible transition pipe 11 is connected to a vibrating screen 6. The system also includes a PLC control unit.

[0032] Example 2 like Figure 1-3 As shown, the segmented self-cleaning mud diversion solids control system proposed in this embodiment includes a front-end liquid inlet unit, which is connected to a rear-end liquid inlet unit through several first flexible transition pipes 8. The bottom of the front-end liquid inlet unit and the bottom of the rear-end liquid inlet unit are both connected to a sedimentation tank 5 through pipes. Each first flexible transition pipe 8 is parallel to each other. The top of the front-end liquid inlet unit and the rear-end liquid inlet unit are connected to an exhaust unit. The rear-end liquid inlet unit is connected to several second flexible transition pipes 11. The other end of each second flexible transition pipe 11 is connected to a vibrating screen 6. The system also includes a PLC control unit. The front-end liquid inlet unit includes a front-end liquid inlet chamber 1. The top surface of the front-end liquid inlet chamber 1 is rectangular, and the bottom surface of the front-end liquid inlet chamber 1 is funnel-shaped. First support legs are fixedly connected to the four corners of the bottom surface of the front-end liquid inlet chamber 1. A first weighing sensor 3 is fixedly connected to the bottom of each first support leg. The other side of each first weighing sensor 3 is in contact with the ground. A first slide valve 2 is connected to the bottom surface of the front-end liquid inlet chamber 1 through a flange. The other end of the first slide valve 2 is connected to the inlet of the screw conveyor 4 through a flange. The outlet of the screw conveyor 4 is connected to a screw conveyor slide valve 14. The other end of the screw conveyor slide valve 14 is connected to the sedimentation tank 5 through a pipe. A mud return pipe is connected to the side of the front-end liquid inlet chamber 1. An impact baffle 10 is fixedly connected to the inner cavity of the front-end liquid inlet chamber 1. The impact baffle 10 is positioned corresponding to the mud return pipe.

[0033] Example 3 like Figure 1-4As shown, the segmented self-cleaning mud diversion solids control system proposed in this embodiment includes a front-end liquid inlet unit, which is connected to a rear-end liquid inlet unit through several first flexible transition pipes 8. The bottom of the front-end liquid inlet unit and the bottom of the rear-end liquid inlet unit are both connected to a sedimentation tank 5 through pipes. Each first flexible transition pipe 8 is parallel to each other. The top of the front-end liquid inlet unit and the rear-end liquid inlet unit are connected to an exhaust unit. The rear-end liquid inlet unit is connected to several second flexible transition pipes 11. The other end of each second flexible transition pipe 11 is connected to a vibrating screen 6. The system also includes a PLC control unit. The front-end liquid inlet unit includes a front-end liquid inlet chamber 1. The top surface of the front-end liquid inlet chamber 1 is rectangular, and the bottom surface of the front-end liquid inlet chamber 1 is funnel-shaped. First support legs are fixedly connected to the four corners of the bottom surface of the front-end liquid inlet chamber 1. A first weighing sensor 3 is fixedly connected to the bottom of each first support leg. The other side of each first weighing sensor 3 is in contact with the ground. A first slide valve 2 is connected to the bottom surface of the front-end liquid inlet chamber 1 through a flange. The other end of the first slide valve 2 is connected to the inlet of the screw conveyor 4 through a flange. The outlet of the screw conveyor 4 is connected to a screw conveyor slide valve 14. The other end of the screw conveyor slide valve 14 is connected to the sedimentation tank 5 through a pipe. A mud return pipe is connected to the side of the front-end liquid inlet chamber 1. An impact baffle 10 is fixedly connected to the inner cavity of the front-end liquid inlet chamber 1. The impact baffle 10 is positioned corresponding to the mud return pipe. The rear liquid inlet unit includes a rear liquid inlet chamber 7. The top surface of the rear liquid inlet chamber 7 is rectangular, and the bottom surface of the rear liquid inlet chamber 7 is funnel-shaped. Second support legs 12 are fixedly connected to the four corners of the bottom surface of the rear liquid inlet chamber 7. A second weighing sensor 16 is fixedly connected to the bottom of each second support leg 12. The other side of each second weighing sensor 16 is in contact with the ground. A second slide valve 15 is connected to the bottom surface of the rear liquid inlet chamber 7 through a flange. The other end of the second slide valve 15 is connected to the sedimentation tank 5 through a pipe. Several vibrators 13 are evenly arranged on the bottom surface of the rear liquid inlet chamber 7.

[0034] Example 4 like Figure 1-5As shown, the segmented self-cleaning mud diversion solids control system proposed in this embodiment includes a front-end liquid inlet unit, which is connected to a rear-end liquid inlet unit through several first flexible transition pipes 8. The bottom of the front-end liquid inlet unit and the bottom of the rear-end liquid inlet unit are both connected to a sedimentation tank 5 through pipes. Each first flexible transition pipe 8 is parallel to each other. The top of the front-end liquid inlet unit and the rear-end liquid inlet unit are connected to an exhaust unit. The rear-end liquid inlet unit is connected to several second flexible transition pipes 11. The other end of each second flexible transition pipe 11 is connected to a vibrating screen 6. The system also includes a PLC control unit. The front-end liquid inlet unit includes a front-end liquid inlet chamber 1. The top surface of the front-end liquid inlet chamber 1 is rectangular, and the bottom surface of the front-end liquid inlet chamber 1 is funnel-shaped. First support legs are fixedly connected to the four corners of the bottom surface of the front-end liquid inlet chamber 1. A first weighing sensor 3 is fixedly connected to the bottom of each first support leg. The other side of each first weighing sensor 3 is in contact with the ground. A first slide valve 2 is connected to the bottom surface of the front-end liquid inlet chamber 1 through a flange. The other end of the first slide valve 2 is connected to the inlet of the screw conveyor 4 through a flange. The outlet of the screw conveyor 4 is connected to a screw conveyor slide valve 14. The other end of the screw conveyor slide valve 14 is connected to the sedimentation tank 5 through a pipe. A mud return pipe is connected to the side of the front-end liquid inlet chamber 1. An impact baffle 10 is fixedly connected to the inner cavity of the front-end liquid inlet chamber 1. The impact baffle 10 is positioned corresponding to the mud return pipe. The downstream liquid inlet unit includes a downstream liquid inlet chamber 7. The top surface of the downstream liquid inlet chamber 7 is rectangular, and the bottom surface of the downstream liquid inlet chamber 7 is funnel-shaped. Second support legs 12 are fixedly connected to the four corners of the bottom surface of the downstream liquid inlet chamber 7. A second weighing sensor 16 is fixedly connected to the bottom of each second support leg 12. The other side of each second weighing sensor 16 is in contact with the ground. A second slide valve 15 is connected to the bottom surface of the downstream liquid inlet chamber 7 via a flange. The other end of the second slide valve 15 is connected to the sedimentation tank 5 via a pipe. Several vibrators 13 are evenly arranged on the bottom surface of the downstream liquid inlet chamber 7. The second support leg 12 includes a fixed support leg. One end of the fixed support leg is fixedly connected to the bottom surface of the downstream liquid inlet chamber 7, and the other end of the fixed support leg is fixedly connected to a telescopic rod. The other end of the telescopic rod is slidably connected to a sliding hole leg. A spring is sleeved on the telescopic rod and is positioned between the fixed support leg and the sliding hole leg. A second weighing sensor 16 is fixedly connected to the bottom of the sliding hole leg.

[0035] Example 5 like Figure 1-5As shown, the segmented self-cleaning mud diversion solids control system proposed in this embodiment includes a front-end liquid inlet unit, which is connected to a rear-end liquid inlet unit through several first flexible transition pipes 8. The bottom of the front-end liquid inlet unit and the bottom of the rear-end liquid inlet unit are both connected to a sedimentation tank 5 through pipes. Each first flexible transition pipe 8 is parallel to each other. The top of the front-end liquid inlet unit and the rear-end liquid inlet unit are connected to an exhaust unit. The rear-end liquid inlet unit is connected to several second flexible transition pipes 11. The other end of each second flexible transition pipe 11 is connected to a vibrating screen 6. The system also includes a PLC control unit. The front-end liquid inlet unit includes a front-end liquid inlet chamber 1. The top surface of the front-end liquid inlet chamber 1 is rectangular, and the bottom surface of the front-end liquid inlet chamber 1 is funnel-shaped. First support legs are fixedly connected to the four corners of the bottom surface of the front-end liquid inlet chamber 1. A first weighing sensor 3 is fixedly connected to the bottom of each first support leg. The other side of each first weighing sensor 3 is in contact with the ground. A first slide valve 2 is connected to the bottom surface of the front-end liquid inlet chamber 1 through a flange. The other end of the first slide valve 2 is connected to the inlet of the screw conveyor 4 through a flange. The outlet of the screw conveyor 4 is connected to a screw conveyor slide valve 14. The other end of the screw conveyor slide valve 14 is connected to the sedimentation tank 5 through a pipe. A mud return pipe is connected to the side of the front-end liquid inlet chamber 1. An impact baffle 10 is fixedly connected to the inner cavity of the front-end liquid inlet chamber 1. The impact baffle 10 is positioned corresponding to the mud return pipe. The downstream liquid inlet unit includes a downstream liquid inlet chamber 7. The top surface of the downstream liquid inlet chamber 7 is rectangular, and the bottom surface of the downstream liquid inlet chamber 7 is funnel-shaped. Second support legs 12 are fixedly connected to the four corners of the bottom surface of the downstream liquid inlet chamber 7. A second weighing sensor 16 is fixedly connected to the bottom of each second support leg 12. The other side of each second weighing sensor 16 is in contact with the ground. A second slide valve 15 is connected to the bottom surface of the downstream liquid inlet chamber 7 via a flange. The other end of the second slide valve 15 is connected to the sedimentation tank 5 via a pipe. Several vibrators 13 are evenly arranged on the bottom surface of the downstream liquid inlet chamber 7. The second support leg 12 includes a fixed support leg. One end of the fixed support leg is fixedly connected to the bottom surface of the downstream liquid inlet chamber 7, and the other end of the fixed support leg is fixedly connected to a telescopic rod. The other end of the telescopic rod is slidably connected to a sliding hole leg. A spring is sleeved on the telescopic rod and is positioned between the fixed support leg and the sliding hole leg. A second weighing sensor 16 is fixedly connected to the bottom of the sliding hole leg. The height of the second flexible transition section 11 is greater than the height of the first flexible transition section 8. The exhaust unit includes a three-way pipe; the first inlet of the three-way pipe passes through the top surface of the front liquid inlet chamber 1 and communicates with the inner cavity of the front liquid inlet chamber 1; the second inlet of the three-way pipe passes through the top surface of the rear liquid inlet chamber 7 and communicates with the inner cavity of the rear liquid inlet chamber 7; and an exhaust fan 9 is provided at the outlet of the three-way pipe. The PLC control unit includes a PLC control system, which is connected via signal lines to the first slide gate valve 2, the slide gate valve 14 with a screw conveyor, the second slide gate valve 15, the screw conveyor 4, the first weighing sensor 3, and the second weighing sensor 16.

[0036] Example 6 like Figure 1-5 As shown in the figure, the method for solids control using a segmented self-cleaning mud diversion solids control system proposed in this embodiment specifically includes the following steps: S1. Close the first slide valve 2. The mud enters the front inlet chamber 1 for impact diversion. The escaping gas is discharged through the exhaust unit. The mud then enters the rear inlet chamber 7 and is diverted to the corresponding vibrating screen 6 for vibration treatment through multiple second flexible transition pipes 11. S2. When the sedimented impurities at the bottom of the current inlet chamber 1 accumulate to exceed the limit weight threshold, the first gate valve 2 is opened by the PLC control system, and the impurities at the bottom fall down quickly. The screw conveyor 4 starts running before the first gate valve 2 is opened to remove the impurities that fall from the bottom.

Claims

1. A segmented self-cleaning mud diversion solids control system, characterized in that, The system includes a front-end liquid inlet unit, which is connected to a rear-end liquid inlet unit via several first flexible transition pipes (8). The bottom of the front-end liquid inlet unit and the bottom of the rear-end liquid inlet unit are connected to a sedimentation tank (5) via pipes. Each of the first flexible transition pipes (8) is parallel to each other. The top of the front-end liquid inlet unit and the rear-end liquid inlet unit are connected to an exhaust unit. The rear-end liquid inlet unit is connected to several second flexible transition pipes (11). The other end of each second flexible transition pipe (11) is connected to a vibrating screen (6). The system also includes a PLC control unit.

2. The segmented self-cleaning mud diversion solids control system according to claim 1, characterized in that, The front-end liquid inlet unit includes a front-end liquid inlet chamber (1). The top surface of the front-end liquid inlet chamber (1) is rectangular, and the bottom surface of the front-end liquid inlet chamber (1) is funnel-shaped. First support legs are fixedly connected to the four corners of the bottom surface of the front-end liquid inlet chamber (1). A first weighing sensor (3) is fixedly connected to the bottom of each first support leg. The other side of each first weighing sensor (3) is in contact with the ground. A first slide gate valve (2) is connected to the bottom surface of the front-end liquid inlet chamber (1) via a flange. The other end of a slide gate valve (2) is connected to the inlet of a screw conveyor (4) via a flange. The outlet of the screw conveyor (4) is connected to a screw conveyor slide gate valve (14). The other end of the screw conveyor slide gate valve (14) is connected to the sedimentation tank (5) via a pipe. The side of the front liquid inlet tank (1) is connected to a mud return pipe. An impact baffle (10) is fixedly connected to the inner cavity of the front liquid inlet tank (1). The impact baffle (10) is positioned opposite to the mud return pipe.

3. The segmented self-cleaning mud diversion solids control system according to claim 2, characterized in that, The rear liquid inlet unit includes a rear liquid inlet chamber (7). The top surface of the rear liquid inlet chamber (7) is rectangular, and the bottom surface of the rear liquid inlet chamber (7) is funnel-shaped. Second support legs (12) are fixedly connected to the four corners of the bottom surface of the rear liquid inlet chamber (7). A second weighing sensor (16) is fixedly connected to the bottom of each second support leg (12). The other side of each second weighing sensor (16) is in contact with the ground. A second slide valve (15) is connected to the bottom surface of the rear liquid inlet chamber (7) through a flange. The other end of the second slide valve (15) is connected to the sedimentation tank (5) through a pipe. Several vibrators (13) are evenly arranged on the bottom surface of the rear liquid inlet chamber (7).

4. The segmented self-cleaning mud diversion solids control system according to claim 3, characterized in that, The second support leg (12) includes a fixed support leg. One end of the fixed support leg is fixedly connected to the bottom surface of the rear liquid inlet chamber (7). The other end of the fixed support leg is fixedly connected to a telescopic rod. The other end of the telescopic rod is slidably connected to a sliding hole leg. A spring is sleeved on the telescopic rod. The spring is located between the fixed support leg and the sliding hole leg. A second weighing sensor (16) is fixedly connected to the bottom of the sliding hole leg.

5. The segmented self-cleaning mud diversion solids control system according to claim 4, characterized in that, The height of the second flexible transition tube (11) is greater than the height of the first flexible transition tube (8).

6. The segmented self-cleaning mud diversion solids control system according to claim 5, characterized in that, The exhaust unit includes a three-way pipe. The first inlet of the three-way pipe passes through the top surface of the front liquid inlet chamber (1) and communicates with the inner cavity of the front liquid inlet chamber (1). The second inlet of the three-way pipe passes through the top surface of the rear liquid inlet chamber (7) and communicates with the inner cavity of the rear liquid inlet chamber (7). An exhaust fan (9) is provided at the outlet of the three-way pipe.

7. The segmented self-cleaning mud diversion solids control system according to claim 6, characterized in that, The PLC control unit includes a PLC control system, which is connected to the first gate valve (2), the screw conveyor gate valve (14), the second gate valve (15), the screw conveyor (4), the first weighing sensor (3), and the second weighing sensor (16) via signal lines.

8. A method for solids control using the segmented self-cleaning mud diversion solids control system as described in claim 7, characterized in that, Specifically, the steps include the following: S1. Close the first gate valve (2), and the mud enters the front inlet chamber (1) for impact diversion. The escaping gas is discharged through the exhaust unit. The mud then enters the rear inlet chamber (7) and is diverted to the corresponding vibrating screen (6) for vibration treatment through multiple second flexible transition pipes (11). S2. When the sedimentation impurities at the bottom of the current liquid inlet chamber (1) accumulate to exceed the limit weight threshold, the first gate valve (2) is opened by the PLC control system, and the impurities at the bottom fall down quickly. The screw conveyor (4) starts running before the first gate valve (2) is opened to remove the impurities that fall from the bottom.

Images