Wall-fixing slurry transfer device

Abstract

The utility model relates to the technical field of geological treatment, and particularly discloses a solid-wall slurry transfer device which comprises a main storage tank for temporarily storing solid-wall slurry and further comprises an agent blending unit for adding agents into the main storage tank and an online monitoring unit for monitoring the state of the solid-wall slurry in real time. The main storage tank is also communicated with a circulating mechanism for driving the wall-fixing slurry to circularly flow, a conveying mechanism for conveying the wall-fixing slurry inwards and / or outwards, and a main control unit electrically connected with the circulating mechanism, the conveying mechanism, the online monitoring unit and the medicament blending unit respectively; and the main control unit also comprises a memory for storing mapping data of different medicament contents and the density, viscosity and anti-filtration rate of the solid wall slurry. The slurry performance can be changed in real time according to the change of the stratum condition through hierarchical modulation setting and stratum slurry parameter acquisition, and the problems that existing prefabricated slurry has hysteresis quality and is not matched with a complex stratum are solved.

Description

Technical Field

[0001] This utility model relates to the field of geological infrastructure treatment technology, and in particular to the field of equipment for temporary storage and transfer of solidification mud in geological seepage prevention treatment technology, specifically to a solidification slurry transfer device. Background Technology

[0002] The mud transfer station is a core supporting facility in mud wall protection technology in geological engineering, undertaking four core functions: mud storage, performance adjustment, dynamic transfer, and recycling. During trenching construction, the mud needs to have its density (1.05-1.25 g / cm³), viscosity (25-50 s), and pH value (8-10) adjusted in real time according to the formation characteristics (such as sand, clay, or rock layers). The transfer station, equipped with a mixing tank, storage tank, and chemical dosing system, can quickly optimize the mud mix ratio, ensuring its ability to form a stable mud cake and balance formation pressure. For example, in gravel formations, the transfer station needs to add thickeners to increase the mud viscosity to above 45 s to enhance its ability to suspend rock cuttings; while in clay formations, dispersants are needed to adjust and reduce the mud yield value to avoid the risk of drill bit clogging. Furthermore, the transfer station utilizes a circulating pump system to achieve closed-loop circulation of drilling mud between the trench and the ground, with a processing capacity of 200-500 m³ per hour. Combined with desanders, vibrating screens, and other equipment, it can remove over 80% of drill cuttings, significantly reducing the mud waste rate. From an environmental perspective, modern transfer stations have integrated solid-liquid separation devices that can dehydrate and solidify waste mud, reducing the moisture content of solid waste to below 30%, meeting the requirements of the "Technical Specification for Construction Mud Treatment" (JGJ / T 419-2017), thus becoming a key node bridging engineering efficiency and ecological protection.

[0003] Currently, domestic mud transfer stations generally face three major challenges: lagging technological iteration, extensive management, and environmental pressure. In terms of equipment, approximately 65% ​​of transfer stations still use open-air mud storage tanks (100-300 m³) and manual dosing, lacking automated monitoring devices. Adjusting mud parameters takes 2-4 hours, making it difficult to meet the needs of complex geological formations. For example, in construction in the silty sand formations of the lower Yangtze River, the rate of borehole collapse due to delayed mud density control is approximately 12%. Regarding energy consumption, traditional transfer station circulation systems mostly use industrial frequency motors, with a measured energy waste rate of approximately 28%, and lack waste heat recovery designs. In terms of environmental treatment, most stations are only equipped with primary hydrocyclone desanders, resulting in a mud reuse rate of less than 50%, with an average annual waste mud volume exceeding 5000 m³ per project. Furthermore, the industry has not yet established unified intelligent monitoring standards; only a small number of companies apply IoT technology (such as NB-IoT sensors), leading to severe data silos. Therefore, technological upgrades and standardization are urgently needed. Utility Model Content

[0004] To address the problems mentioned in the background art, such as the low efficiency and long cycle of mud mixing caused by most existing mud transfer stations still focusing on temporary mud storage and manual mixing, and the low recovery rate and high waste rate due to simple mud recovery equipment, this application provides a solid-wall slurry transfer device. By modifying the transfer device, at least one of the following technical effects can be achieved:

[0005] 1. By classifying the slurry storage tank, the returned slurry, foundation slurry and prepared slurry can be managed separately. At different stages of construction and with different needs, the slurry can be treated separately, thereby improving the slurry recovery rate and reducing waste.

[0006] 2. Real-time online monitoring of mud can effectively improve mud preparation efficiency, shorten grouting waiting time, increase trenching construction efficiency, and reduce the risk of borehole failure. At the same time, it can also make data playback traceable, establish mud archives, accumulate construction data, and lay the foundation for subsequent research on the performance of different muds in different geological environments.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A solid-wall slurry transfer device includes a main storage tank for temporarily storing solid-wall slurry, a reagent preparation unit for adding reagents to the main storage tank, and an online monitoring unit for real-time monitoring of the solid-wall slurry status. The main storage tank is also connected to a circulation mechanism for driving the solid-wall slurry to circulate and a conveying mechanism for conveying the solid-wall slurry internally and / or externally. A main control unit is electrically connected to the circulation mechanism, the conveying mechanism, the online monitoring unit, and the reagent preparation unit, respectively. The main control unit also includes a memory for storing mapping data of different reagent contents with the density, viscosity, and filtration resistance rate of the solid-wall slurry.

[0009] The main storage tank is a structural component used for temporary storage and preparation of the slurry. Its shape, volume, and number are unrestricted and can be flexibly designed or selected based on the actual slurry storage volume. When grading of the temporarily stored slurry is required, multiple main storage tanks can be used, with selective and controllable interconnections between them. For example, passive interconnection via pipelines with valves can be used, or active interconnection via pipelines with valves and pumps can be used. The reagent preparation unit is a mechanism for adjusting the properties of the slurry temporarily stored in the main storage tank by actively adding different additives to change the slurry's density, viscosity, thermal stability, and resistance to filtration loss. The online monitoring unit is a mechanism for real-time acquisition of various parameters of the solidification slurry at different locations. Its function is to continuously monitor whether the slurry parameters meet the current formation construction requirements. If not, the properties of the current solidification slurry can be adjusted through the reagent preparation unit. The main control unit is an information processor that sends control electrical signals to the reagent preparation unit to add reagents by comparing the difference between the target solidification slurry parameters given by the user and the current solidification slurry parameters collected from the online monitoring unit. It is responsible for automatically modulating the solidification slurry to achieve the technical effect of accurately and efficiently outputting solidification slurry with preset performance.

[0010] To better classify and process the solidification slurry, preferably, the main storage tank includes a first main storage tank selectively connected to each other for receiving formation return slurry, a second main storage tank for temporarily storing the solidification slurry, and a third main storage tank for preparing the slurry. The formation return slurry is transported to a hydrocyclone desander through a return pipe. The outlet of the hydrocyclone desander is connected to the inlet of a vibrating screen filter, and the outlet of the vibrating screen filter is connected to the first main storage tank. The first main storage tank is mainly used to receive return slurry or return slurry from the bottom layer. Depending on different geological conditions, the density, viscosity, and filtration resistance of the return slurry may differ significantly from the solidification slurry injected into the bottom layer. To balance the recycling of the return slurry with ensuring that it does not pollute or negatively impact the normal solidification slurry, a graded temporary storage method is adopted to provide the necessary environmental conditions for the graded processing of the slurry. The returned slurry is physically treated by a hydrocyclone desander and a vibrating screen filter to remove the mud and sand particles generated during trenching, obtaining slurry that basically meets the recycling requirements. At this point, the slurry is temporarily stored in the first main storage tank and will not be mixed with other slurries. This provides an independent temporary storage environment for further processing and preparation to make the returned slurry meet the requirements for re-injection, so as to maximize the recycling of returned slurry, avoid slurry waste, reduce the amount of waste slurry, reduce the pressure of subsequent processing, and reduce environmental pollution.

[0011] To further expand the overall function and efficiency of the transfer unit, improve the control of returned slurry quality, and avoid slurry contamination caused by mixing returned slurry with qualified solidified slurry, preferably, the conveying mechanism includes a first conveying pump. The inlet end of the first conveying pump is connected to the first main storage tank, and the outlet end of the first conveying pump is equipped with a detection mechanism electrically connected to the main control unit. The other end of the detection mechanism is connected to the slurry outlet pipe and the waste slurry pipe connected to the second main storage tank via a controllable three-way valve. The detection mechanism is another node for quality control of the returned slurry after initial screening. Only returned slurry that meets the preset density can enter the next stage of temporary storage device, such as the second main storage tank. If it does not meet the preset density requirement, it means that the quality of the returned slurry differs significantly from the preset qualified slurry density. In this case, simple adjustment may not meet the qualified standard, so the returned slurry is sent to the waste slurry pipe for more complex subsequent processing via the three-way valve. It is worth noting that the discharge pipe here only prohibits the return slurry from entering the transfer unit, and does not completely mean that the return slurry is to be discarded. It can be reused, but a more complex process is required to reprocess the slurry to meet the reuse standard. Only within the range that the transfer unit can process is the return slurry allowed to enter the second main storage tank. This ensures that the entire transfer unit can maintain a highly efficient state of slurry circulation and processing, and will not cause abnormal return slurry due to reuse, thus preventing damage to the entire transfer unit's slurry processing capacity and stability.

[0012] Furthermore, to facilitate the preparation and transportation of the slurry, preferably, the transportation mechanism further includes a pressure equalization pipe connecting the second main storage tank and the third main storage tank. The pressure equalization pipe is equipped with a butterfly valve electrically connected to the main control unit, and a second delivery pump whose feed end is connected to the third main storage tank. The discharge end of the second delivery pump is connected to the formation through a slurry delivery pipe.

[0013] More preferably, the reagent preparation unit includes a dosing mechanism installed on the third main storage tank to add reagents into the third main storage tank according to a drive signal sent by the main control unit, and a stirring mechanism installed on the first main storage tank, the second main storage tank and the third main storage tank respectively for stirring the solid wall slurry.

[0014] To improve the accuracy of slurry preparation, preferably, the dosing mechanism includes multiple reagent tanks, each of which is equipped with a metering conveying mechanism, which is any one of a metering pump, a screw conveyor, or a flow controller.

[0015] To achieve matching between mud preparation and formation conditions, preferably, two sets of online monitoring units are used, one installed inside the third main storage tank and the other on the twin-wheel milling machine used for trenching. Each set of online monitoring units includes one or more of a density sensor, a rotational viscometer, a temperature sensor, and a pH sensor. The purpose of installing the online monitoring units on the twin-wheel milling machine for trenching is to collect the current formation mud index status in real time. Based on the actual formation conditions and mud mapping data comparison, the difference between the required slurry for the current formation and the solidified slurry in the third main storage tank can be quickly obtained. The main control unit then sends a reagent addition command to the reagent preparation unit to quickly prepare a slurry matching the current formation and delivers it to the current formation in a timely manner via the second delivery pump. This ensures that throughout the trenching process, regardless of the complexity or rapid changes in the formation environment, this invention can provide a matching slurry in a timely manner, ensuring the normal progress of construction. This avoids the problems of mismatch between existing pre-prepared mud and changing formation environments, which can lead to large leaks, poor filtration resistance, and high-temperature flocculation of the mud during construction.

[0016] To improve the accuracy of information collected by the online monitoring unit, the circulation mechanism preferably includes a third delivery pump, and injection pipes and suction pipes installed at different positions near the bottom of the third main storage tank and respectively connected to the inlet / outlet of the third delivery pump. The function of the circulation mechanism differs from that of the stirring mechanism, especially when the main storage tank is large. The difference lies in the fact that the stirring mechanism uses a continuously agitating structure to drive the mud movement, which is generally localized. The larger and more irregular the main storage tank, the larger the blind zone of mud agitation. To address this, the circulation mechanism uses a mud jet to drive the mud to tumble from bottom to top, solving the problem of uneven mixing of mud and reagents caused by the agitation blind zone. It is worth noting that the direction of the mud jet driven by the circulation mechanism depends on the outlet direction of the injection pipe. Ideally, it should be perpendicular to the plane or direction of the stirring mechanism, maximizing disturbance and turbulence. The circulation mechanism and the stirring mechanism can operate simultaneously or in an alternating manner. Beneficial effects

[0017] 1. This utility model adopts a three-level temporary storage system, which temporarily stores the returned slurry, the base slurry, and the prepared slurry, respectively. It can effectively integrate the reuse of returned slurry, the large-scale supply of base slurry, and the targeted processing and supply of prepared slurry, so as to meet the preparation and transportation needs of slurry throughout the entire process and the entire formation.

[0018] 2. This utility model can establish mapping data by traversing the maximum and minimum ranges of reagent adjustment and recording and storing information on the effects of different reagents on parameters such as slurry density, viscosity, filtration loss, and thermal stability. This enables the rapid determination of the mud performance required for different formation conditions and the control of the reagent preparation unit to adjust the current slurry, quickly obtain the required performance slurry, and deliver it into the formation in a timely manner.

[0019] 3. The graded modulation setting and formation mud parameter acquisition of this utility model can change the mud performance in real time according to the changes in formation conditions, solving the problem of existing pre-made mud having lag and mismatch with complex formations. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is the isometric view of the structure of this utility model.

[0022] Figure 2 This is a top view of the structure of this utility model.

[0023] Figure 3 yes Figure 1 Another visual structural axonometric drawing.

[0024] Figure 4 This is a structural block diagram of an embodiment of the present utility model.

[0025] In the diagram: 1-Main storage tank; 11-First main storage tank; 12-Second main storage tank; 13-Third main storage tank; 2-Vibrating screen filter; 3-Cyclone sand separator; 4-Circulation mechanism; 41-Suction pipe; 42-Jet pipe; 5-Conveying mechanism; 51-First conveying pump; 52-Detection mechanism; 53-Storage pipe; 54-Discarding pipe; 55-Second conveying pump; 56-Slurry delivery pipe; 57-Return pipe; 58-Equalizing pipe; 6-Reagent preparation unit; 61-Dosing mechanism; 62-Stirring mechanism; 7-Online monitoring unit; 71-Density sensor; 72-Rotation viscometer; 73-Temperature sensor; 74-pH sensor. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] 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.

[0029] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for 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 application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example

[0032] This embodiment provides a solid-wall slurry transfer device; the system framework of the device is described in [reference needed]. Figure 4 As shown, the specific structure of the device is described in the appendix. Figures 1-3 As shown, the system includes a main storage tank 1 for temporarily storing solidified wall slurry, a reagent preparation unit 6 for adding reagents to the main storage tank 1, and an online monitoring unit 7 for real-time monitoring of the solidified wall slurry status. The main storage tank 1 is also connected to a circulation mechanism 4 for driving the solidified wall slurry to circulate and a conveying mechanism 5 for conveying the solidified wall slurry internally and / or externally. A main control unit is electrically connected to the circulation mechanism 4, the conveying mechanism 5, the online monitoring unit 7, and the reagent preparation unit 6, respectively. The main control unit also includes a memory for storing mapping data of different reagent contents with the density, viscosity, and filtration resistance rate of the solidified wall slurry.

[0033] The connection relationships and working principles between various components are explained as follows: The main storage tank 1 is a structural component used for temporary storage and preparation of the slurry. Its shape, volume, and quantity are unrestricted and can be flexibly designed or selected according to the actual slurry storage volume. When it is necessary to grade the temporarily stored slurry, multiple main storage tanks 1 can be used, and they can be selectively and controllably connected to each other. For example, they can be passively connected via pipelines with valves, or actively connected via pipelines with valves and pumps. The reagent preparation unit 6 is a mechanism for adjusting the properties of the slurry temporarily stored in the main storage tank 1 by actively adding different additives to the slurry to change its density, viscosity, thermal stability, and resistance to filtration loss. The online monitoring unit 7 is a mechanism for real-time acquisition of various parameters of the solidification slurry at different locations. Its function is to continuously monitor whether the various parameters of the slurry meet the current formation construction requirements. If not, the properties of the current solidification slurry can be adjusted through the reagent preparation unit 6. The main control unit is an information processor that sends a control signal for adding reagents to the reagent preparation unit 6 by comparing the difference between the target solidified slurry parameters given by the user and the current solidified slurry parameters collected by the online monitoring unit 7. It is responsible for automatically modulating the solidified slurry to achieve the technical effect of accurately and efficiently outputting solidified slurry with preset properties. It is worth noting that the preset values ​​are set differently depending on the working conditions, projects, and requirements. The viscosity, density, and other parameters of the slurry are set differently. Therefore, there are various circuit designs used for actual automatic control, and these are mature existing technologies. Those skilled in the art can flexibly select and set them according to the actual project application. As long as the electrical signals collected from sensors and other acquisition terminals can be processed and the electrical signal for adding reagents is sent to the reagent preparation unit 6 (the actuator) to achieve closed-loop control, the specific circuit design and the type of processor used are not limited and are not the focus of this embodiment's improvement; existing technologies can be used for this part. Example

[0034] To better classify the solidification slurry, this embodiment, based on Embodiment 1, sets up a tiered system for the main storage tank 1. Specifically, the main storage tank 1 includes a first main storage tank 11 selectively connected to each other for receiving formation return slurry, a second main storage tank 12 for temporarily storing the solidification slurry, and a third main storage tank 13 for preparing the slurry. The formation return slurry is transported to a hydrocyclone desander 3 via a return pipe 57. The outlet of the hydrocyclone desander 3 is connected to the inlet of a vibrating screen filter 2, and the outlet of the vibrating screen filter 2 is connected to the first main storage tank 11. The first main storage tank 11 is mainly used to receive return slurry or slurry from the bottom layer. Depending on different geological conditions, the density, viscosity, and filtration resistance of the return slurry may differ significantly from the solidification slurry injected into the bottom layer. To balance the recycling of the return slurry with ensuring that it does not pollute or negatively impact the normal solidification slurry, a tiered temporary storage method is adopted to provide the necessary environmental conditions for the slurry's tiered treatment. The returned slurry is physically treated by a hydrocyclone desander 3 and a vibrating screen filter 2 to remove the mud and sand particles generated during trenching, obtaining slurry that basically meets the recycling requirements. At this time, the slurry is temporarily stored in the first main storage tank 11 and will not be mixed with other slurries. This provides an independent temporary storage environment for further processing and preparation to make the returned slurry meet the requirements for re-injection, so as to maximize the recycling of returned slurry, avoid slurry waste, reduce the amount of waste slurry, reduce the pressure of subsequent processing, and reduce environmental pollution.

[0035] To further expand the overall function and efficiency of the transfer device, improve the control of returned slurry quality, and avoid slurry contamination caused by mixing returned slurry with qualified solidified wall slurry, in this embodiment, the conveying mechanism 5 includes a first conveying pump 51. The inlet end of the first conveying pump 51 is connected to the first main storage tank 11, and the outlet end of the first conveying pump 51 is equipped with a detection mechanism 52 electrically connected to the main control unit. The other end of the detection mechanism 52 is connected to the slurry outlet pipe 53 and the waste slurry pipe 54 of the second main storage tank 12 via a controllable three-way valve. The detection mechanism 52 can be configured differently according to different application requirements and the requirements for returned slurry. For example, it can include detection of core indicators such as density, viscosity, and sand content, or it can detect only a single core indicator, such as only density or viscosity. The testing unit 52 is another point of quality control for the returned slurry after the initial screening. Only returned slurry that meets the preset parameter requirements can enter the next stage of temporary storage device, such as the second main storage tank 12. If it does not meet the preset parameter requirements, it means that the quality of the returned slurry differs significantly from the preset qualified slurry density. In this case, simple preparation may not meet the qualified standard. In this case, the returned slurry is sent to the waste slurry pipe 54 through a three-way valve for more complex subsequent processing. It is worth noting that the waste slurry pipe 54 here only prohibits the returned slurry from entering the transfer device, and does not completely mean that the returned slurry is discarded. It can be reused, but more complex processes are required to reprocess the slurry to meet the reuse standard. Only returned slurry that can be prepared and processed by the transfer device is allowed to enter the second main storage tank 12. This ensures that the entire transfer device can maintain a highly efficient state of slurry circulation and processing, and will not cause abnormal returned slurry due to reuse, thus preventing damage to the entire transfer device's slurry processing capacity and stability.

[0036] Furthermore, to facilitate the preparation and transportation of the slurry, the conveying mechanism 5 further includes a pressure equalization pipe 58 connecting the second main storage tank 12 and the third main storage tank 13. The pressure equalization pipe 58 is equipped with a butterfly valve electrically connected to the main control unit, and a second conveying pump 55 whose feed end is connected to the third main storage tank 13. The discharge end of the second conveying pump 55 is connected to the formation through a slurry delivery pipe 56. Example

[0037] This embodiment further optimizes the settings based on any of the above embodiments; see the appendix to the instruction manual for details. Figure 1 and Figure 4As shown, the reagent preparation unit 6 includes a dosing mechanism 61 installed on the third main storage tank 13 to add reagents to the third main storage tank 13 according to a drive signal sent by the main control unit, and a stirring mechanism 62 respectively installed on the first main storage tank 11, the second main storage tank 12, and the third main storage tank 13 for stirring the solid wall slurry. To improve the slurry preparation accuracy, the dosing mechanism 61 includes multiple reagent tanks, each of which is equipped with a metering conveying mechanism, which can be any one of a metering pump, a screw conveyor, or a flow controller.

[0038] To achieve matching between mud preparation and formation conditions, in this embodiment, two sets of online monitoring units 7 are used, one installed inside the third main storage tank 13 and the other on the twin-wheel milling machine used for trenching. Each set of online monitoring units 7 includes one or more of a density sensor 71, a rotational viscometer 72, a temperature sensor 73, and a pH sensor 74. The purpose of installing the online monitoring units 7 on the twin-wheel milling machine for trenching is to collect the current formation mud index status in real time. Based on the actual formation conditions and mud mapping data comparison, the difference between the required slurry for the current formation and the solidification slurry in the third main storage tank 13 can be quickly obtained. The main control unit then sends a reagent addition command to the reagent preparation unit 6 to quickly prepare a slurry matching the current formation and delivers it to the current formation in a timely manner via the second delivery pump 55. This ensures that throughout the trenching process, regardless of the complexity or rapid changes in the formation environment, this invention can provide a matching slurry in a timely manner, ensuring the normal progress of construction. To avoid the incompatibility of existing precast mud with changes in the geological environment, which can lead to problems such as large leakage, poor filtration resistance, and high-temperature flocculation of mud during construction.

[0039] To improve the accuracy of information collected by the online monitoring unit 7, in this embodiment, the circulation mechanism 4 includes a third delivery pump, and injection pipes 42 and suction pipes 41 installed at different positions near the bottom of the third main storage tank 13 and respectively connected to the inlet / outlet of the third delivery pump. The function of the circulation mechanism 4 differs from that of the stirring mechanism 62, especially when the main storage tank 1 has a large volume. The difference lies in the fact that the stirring mechanism 62 uses a continuously agitated structure to drive the mud movement. Generally, this movement is localized; the larger and more irregular the main storage tank 1 is, the larger the blind zone of mud agitation. To address this, the circulation mechanism 4 uses a mud jet to drive the mud to tumble from bottom to top, solving the problem of uneven mixing of mud and reagents due to the blind zone of agitation. It is worth noting that the direction of the mud jet driven by the circulation mechanism 4 depends on the outlet direction of the injection pipe 42. Ideally, it should be perpendicular to the plane or direction of the stirring mechanism 62, maximizing disturbance and turbulence. The circulation mechanism 4 and the stirring mechanism 62 can work simultaneously or in an alternating manner.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A solid-wall slurry transfer device, comprising a main storage tank (1) for temporarily storing solid-wall slurry, characterized in that: It also includes a reagent preparation unit (6) for adding reagents to the main storage tank (1) and an online monitoring unit (7) for real-time monitoring of the solid wall slurry state. The main storage tank (1) is also connected to a circulation mechanism (4) for driving the solid wall slurry to circulate and a conveying mechanism (5) for conveying the solid wall slurry internally and / or externally. It also includes a main control unit that is electrically connected to the circulation mechanism (4), the conveying mechanism (5), the online monitoring unit (7) and the reagent preparation unit (6), respectively. The main control unit also includes a memory for storing mapping data of different reagent contents with the density, viscosity and filtration resistance rate of the solid wall slurry.

2. The solid-wall slurry transfer device according to claim 1, characterized in that: The main storage tank (1) includes a first main storage tank (11) for receiving formation return slurry, a second main storage tank (12) for temporarily storing solidification slurry, and a third main storage tank (13) for preparing slurry, which are selectively connected to each other. The formation return slurry is transported to the hydrocyclone desander (3) through the return slurry pipe (57). The outlet end of the hydrocyclone desander (3) is connected to the inlet of the vibrating screen filter (2), and the outlet of the vibrating screen filter (2) is connected to the first main storage tank (11).

3. The solid-wall slurry transfer device according to claim 2, characterized in that: The conveying mechanism (5) includes a first conveying pump (51), the feed end of the first conveying pump (51) is connected to the first main storage tank (11), the discharge end of the first conveying pump (51) is equipped with a detection mechanism (52) electrically connected to the main control unit, and the other end of the detection mechanism (52) is connected to the slurry outlet pipe (53) and the waste slurry pipe (54) of the second main storage tank (12) respectively through a controllable three-way valve.

4. The solid-wall slurry transfer device according to claim 2 or 3, characterized in that: The conveying mechanism (5) further includes a pressure equalization pipe (58) connecting the second main storage tank (12) and the third main storage tank (13). The pressure equalization pipe (58) is equipped with a butterfly valve electrically connected to the main control unit, and a second conveying pump (55) whose feed end is connected to the third main storage tank (13). The discharge end of the second conveying pump (55) is connected to the formation through a slurry delivery pipe (56).

5. The solid-wall slurry transfer device according to claim 2 or 3, characterized in that: The drug preparation unit (6) includes a drug addition mechanism (61) installed on the third main storage tank (13) to add drugs into the third main storage tank (13) according to the drive signal sent by the main control unit, and a stirring mechanism (62) installed on the first main storage tank (11), the second main storage tank (12) and the third main storage tank (13) respectively for stirring the solid wall slurry.

6. The solid-wall slurry transfer device according to claim 5, characterized in that: The dosing mechanism (61) includes multiple drug tanks, each of which is equipped with a metering delivery mechanism, which is any one of a metering pump, a screw conveyor, or a flow controller.

7. The solid-wall slurry transfer device according to claim 2 or 3, characterized in that: The number of the online monitoring units (7) is two sets, which are installed inside the third main storage tank (13) and on the double wheel milling machine for troughing, respectively. Each set of the online monitoring units (7) includes one or more of the following: density sensor (71), rotational viscometer (72), temperature sensor (73) and pH sensor (74).

8. The solid-wall slurry transfer device according to claim 2 or 3, characterized in that: The circulation mechanism (4) includes a third delivery pump, and a slurry injection pipe (42) and a slurry suction pipe (41) installed at different positions near the bottom of the third main storage tank (13) and respectively connected to the inlet / outlet of the third delivery pump.

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