Well cementation cement slurry overflow grading device and method

Abstract

The invention relates to the technical field of well cementation, and provides a well cementation cement paste overflow grading device and method. The device comprises a base which is provided with a first input interface, and the first input interface is used for receiving overflow liquid and dispersion liquid of well cementation cement paste; the shunting assembly is mounted at the upper part of the base, communicates with the first input interface and is used for mixing the overflow liquid and the dispersion liquid to obtain first mixed liquid; the sorting tank is installed on the upper portion of the flow dividing assembly and communicates with the flow dividing assembly, a second input connector, a first output port and a second output port are formed in the sorting tank, the first output port is located above the second input connector, and the second output port is located below the second input connector; the sorting tank is used for mixing the first mixed liquid overflowing from the upper end of the flow dividing assembly and the nano-particle slurry input through the second input port to obtain second mixed liquid, and the second mixed liquid overflows through the first output port. According to the scheme disclosed by the invention, the well cementation cement slurry overflow grading effect is improved.

Description

Technical Field

[0001] This invention relates to the field of cementing technology, and in particular to a cementing slurry overflow classification device and method. Background Technology

[0002] Cementing is a crucial part of drilling operations. It refers to the process of running casing into the well and injecting cement into the annular space between the wellbore and the casing. This process includes the casing running and cementing steps. Cementing refers to injecting cement slurry through the casing string into the annular space between the wellbore and the casing string on the surface to form a stable cement ring. This ring is used to seal oil, gas, water layers and complex formations to prevent cross-contamination.

[0003] In cementing slurry systems, the pore structure of the hardened cement slurry significantly affects its mechanical properties. A common improvement method is to add nanoparticles to the cement to alter the pore structure, thereby improving the micro and submicroscopic structure of the cement paste. The added nanoparticles are typically nano-silica particles; therefore, the nano-silica particles need to be graded to a suitable size range according to requirements. Hydraulic overflow grading of cementing slurry is generally performed, which can lead to agglomeration of small particles due to increased surface area. Therefore, dispersants, silica slurry, and overflow fluid from the cementing slurry need to be added.

[0004] In the existing technology for classifying overflow cement slurry, uneven mixing and dispersion of cement slurry is prone to occur. For example, the dispersion liquid and the overflow liquid are not mixed and dispersed evenly, and the nanoparticle slurry and the dispersion liquid are not mixed and dispersed evenly, which reduces the effectiveness of cement slurry overflow classification. Summary of the Invention

[0005] In view of this, the present invention proposes a cement slurry overflow classification device and method, which at least solves the problem that the existing technology is prone to uneven mixing and dispersion of cement slurry, which reduces the overflow classification effect of cement slurry.

[0006] To achieve the above objectives, one aspect of the present invention provides a cement slurry overflow grading device, comprising: A base, on which a first input interface is provided, the first input interface being used to receive overflow fluid and dispersion fluid of cementing slurry; A diversion component is installed on the upper part of the base and connected to the first input interface, used to mix the overflow liquid and dispersion liquid of the cementing slurry to obtain a first mixture; The sorting tank is installed on the upper part of the diversion assembly and communicates with the diversion assembly. The sorting tank is provided with a second input interface and a first output port. The first output port is located above the second input interface. The sorting tank is used to mix a first mixture overflowing from the upper end of the diversion assembly and a nanoparticle slurry input through the second input interface to obtain a second mixture, and the second mixture overflows through the first output port.

[0007] In some embodiments, the cement slurry overflow grading device further includes: An overflow tank is connected to the first output port and is used to collect the second mixture that overflows through the first output port.

[0008] In some embodiments, the first output port is disposed on the outer wall of the sorting tank and located near the top of the sorting tank.

[0009] In some embodiments, the second input interface is disposed on the outer wall of the sorting tank and located near the bottom of the sorting tank.

[0010] In some embodiments, the first input interface includes an overflow interface for receiving the overflow liquid and a dispersion interface for receiving the dispersion liquid.

[0011] In some embodiments, the cross-sectional area of ​​the overflow interface is larger than the cross-sectional area of ​​the dispersion interface.

[0012] In some embodiments, the splitting component includes: A storage cylinder is located on the base and communicates with the first input interface. The storage cylinder is used to mix the overflow liquid and the dispersion liquid to obtain a first mixture and to temporarily store the first mixture. A support cylinder is located between the storage cylinder and the sorting tank, and both ends of the support cylinder are connected to the storage cylinder and the sorting tank, respectively.

[0013] In some embodiments, the support cylinder includes: An overflow pipe is disposed inside the support cylinder, the lower port of the overflow pipe is connected to the storage cylinder, and the upper port of the overflow pipe is connected to the bottom of the sorting tank.

[0014] In some embodiments, the upper port of the overflow pipe is connected to the bottom of the sorting tank via a one-way valve.

[0015] In some embodiments, the one-way valve includes: An output valve port is provided on the side of the upper port of the one-way valve, and is used to overflow the first mixture in the overflow pipe into the bottom of the sorting tank when the hydraulic pressure in the one-way valve reaches a threshold.

[0016] In some embodiments, the output valve port is located below the second input port.

[0017] In some embodiments, there are multiple overflow pipes, which are evenly distributed inside the support cylinder.

[0018] In some embodiments, there are multiple check valves that are evenly distributed among them.

[0019] In some embodiments, the number of output valve ports is multiple, and the valve port directions of adjacent output valve ports are randomly opposite each other.

[0020] In some embodiments, the sorting tank includes: The second output port is disposed on the outer wall of the sorting tank and located below the second input port; A guide plate is disposed between the inner walls of the sorting tank, and the plane on which the guide plate is located is inclined toward the second output port.

[0021] In some embodiments, the second output port is located near the bottom of the sorting tank.

[0022] In some embodiments, the one-way valve extends through the guide plate, and there is a height difference between the output valve port and the upper surface of the guide plate.

[0023] In some embodiments, the deflector includes: A flow guide channel is provided on the upper surface of the flow guide plate, and the bottom surface of the flow guide channel is inclined towards the second output port.

[0024] In some embodiments, the one-way valve does not intersect with the flow guide groove.

[0025] In some embodiments, the number of the flow channels is multiple.

[0026] Another aspect of the present invention provides a method for classifying cement slurry overflow, comprising using a cement slurry overflow classification device as described in any of the preceding embodiments to perform the following operations: The first input interface is connected to the first pipeline to receive the overflow and dispersion of cement slurry, and the second input interface is connected to the second pipeline to receive nanoparticle slurry. The overflow liquid and the dispersion liquid are initially mixed to obtain a first mixture, and the first mixture and the nanoparticle slurry are mixed again with the continuous input of the overflow liquid to obtain a second mixture; The second mixture is output through the first output port.

[0027] The cement slurry overflow classification device provided by this invention receives the overflow liquid and dispersion liquid of cement slurry through a first input interface and mixes them through a diversion component to obtain a first mixture, which then overflows into the bottom of a classification tank. The classification tank is provided with a second output port, a second input interface, and a first output port from bottom to top. Nanoparticle slurry is received through the second input interface of the classification tank and mixed with the first mixture to obtain a second mixture. The second mixture contains nanoparticles with a particle size smaller than the target particle size that move upwards with the second mixture. The first output port is positioned higher than the second output port, thus enabling the second mixture containing nanoparticles with a particle size smaller than the target particle size to be output through the first output port, and the nanoparticles settling downwards in the classification tank to be output through the second output port, thereby achieving the overflow classification effect of the cement slurry. The cement slurry overflow classification device provided by this invention ensures that the nanoparticle slurry is fully mixed and uniformly dispersed with the overflow liquid and dispersion liquid of the cement slurry, achieving overflow classification of the cement slurry and improving the overflow classification effect of the cement slurry.

[0028] In addition, the cement slurry overflow classification method provided by this invention can also achieve the above-mentioned technical effects, and will not be described in detail here. Attached Figure Description

[0029] To better understand the present invention, reference can be made to the embodiments shown in the following figures. Components in the figures are not necessarily drawn to scale, and related elements may be omitted, or in some cases the scale may have been enlarged to emphasize and clearly illustrate the novel features described herein. Additionally, as is known in the art, system components may be arranged differently. Furthermore, in the figures, the same reference numerals denote corresponding parts throughout several views.

[0030] Figure 1 The diagram shown is a schematic diagram of a cement slurry overflow grading device provided in an embodiment of the present invention; Figure 2 The diagram shown is a structural schematic of a shunt component provided in another embodiment of the present invention; Figure 3 The diagram shown is a structural schematic of a one-way valve and a flow guide plate provided in another embodiment of the present invention; Figure 4 The flowchart shown is a method for classifying overflow of cement slurry according to another embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures: 1. Base; 2. First input interface; 21. Overflow liquid interface; 22. Dispersion liquid interface; 3. Diverting component; 31. Storage tank; 32. Support tank; 33. Overflow pipe; 34. Check valve; 341. Output valve port; 35. Guide plate; 351. Guide channel; 4. Sorting tank; 5. Overflow tank; 6. Second input interface; 7. Second output port; 8. First output port. Detailed Implementation

[0032] The following describes embodiments of the present disclosure. However, it should be understood that the disclosed embodiments are merely examples, and other embodiments may take various alternative forms. The drawings are not necessarily drawn to scale; certain functions may be exaggerated or minimized to show details of particular components. Therefore, the specific structural and functional details disclosed herein should not be construed as limiting, but merely as a representative basis for teaching those skilled in the art to use the invention in various ways. As will be understood by those skilled in the art, various features shown and described with reference to any of the drawings may be combined with features shown in one or more other drawings to produce embodiments not explicitly shown or described. The combinations of features shown provide representative embodiments for typical applications. However, various combinations and modifications of features consistent with the teachings of this disclosure may be desirable for certain particular applications or implementations.

[0033] Furthermore, it should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that comprises a list of elements may include not only those elements but also elements not expressly listed or inherent to such process, method, article, or apparatus.

[0034] One or more embodiments of this application will now be described with reference to the accompanying drawings.

[0035] Based on the above objectives, the first aspect of the present invention provides an embodiment of a cement slurry overflow grading device. Figure 1 The diagram shown is a schematic representation of a cement slurry overflow grading device according to an embodiment of the present invention. Figure 1As shown, the cement slurry overflow classification device 100 includes a base 1, a diversion component 3, and a sorting tank 4. The base 1 is provided with a first input interface 2, which is used to receive the overflow liquid and dispersion liquid of the cement slurry. The diversion component 3 is installed on the upper part of the base 1 and is connected to the first input interface 2 so that the diversion component 3 can receive the overflow liquid and dispersion liquid input by the first input interface 2. The diversion component 3 is used to mix the overflow liquid and dispersion liquid to obtain a first mixture liquid. As the overflow liquid is continuously added, the first mixture liquid obtained by mixing in the diversion component 3 overflows from its upper end. The sorting tank 4 is installed on the upper part of the diversion component 3 and is connected to the diversion component 3 to receive the first mixture liquid overflowing from the upper part of the diversion component 3. The sorting tank 4 is provided with a second input interface 6 and a first output port 8. The second input interface 6 is used to receive nanoparticle slurry. The sorting tank 4 is used to mix the first mixture liquid overflowing from the upper end of the diversion component 3 and the nanoparticle slurry to obtain a second mixture liquid, which overflows from the first output port 8. The first mixture obtained by the initial mixing of the overflow liquid and the dispersion liquid in the diversion component 3 is transported to the sorting tank 4. At the same time, the nanoparticle slurry is input into the sorting tank 4 through the second input interface 6 and is fully mixed with the first mixture to obtain the second mixture. The second mixture in the sorting tank 4 maintains an overall upward flow state, which is beneficial to ensure the stability of the mixture flow. The second mixture overflowing from the first output port 8 is the second mixture that meets the particle size requirements of the nanoparticles.

[0036] The aforementioned cement slurry overflow classification device ensures that the nanoparticle slurry is fully mixed and evenly dispersed with the overflow liquid and dispersion liquid of the cement slurry, thereby achieving overflow classification of the cement slurry and improving the overflow classification effect of the cement slurry.

[0037] According to several embodiments of the present invention, the cement slurry overflow classification device 100 is provided with a control unit. The control unit is used to monitor the real-time status of each component of the cement slurry overflow classification device 100, and to control the speed of the overflow liquid input from the first input interface 2 according to the particle size requirement of the nanoparticles in the second mixture overflowing from the first output port 8, so as to ensure that the nanoparticles in the second mixture overflowing from the first output port 8 are within the target particle size range. That is, only nanoparticles smaller than the target particle size overflow from the first output port 8; otherwise, they settle downwards and do not overflow from the first output port 8. Preferably, the nanoparticle slurry is a silica slurry, which can achieve nanoscale particles and is readily available in practical applications.

[0038] Please refer to several embodiments of the present invention. Figure 1 The cement slurry overflow classification device 100 also includes an overflow tank 5, which is connected to the first output port 8 and is used to collect the second mixture overflowing from the first output port 2. Figure 1 The cementing slurry overflow grading device 100 shown is equipped with an overflow tank 5. In actual cementing operation scenarios, the overflow tank 5 can be selectively connected to other pipelines to deliver cementing slurry that meets the operation requirements to the operation site for use.

[0039] Please refer to several embodiments of the present invention. Figure 1 The first output port 8 is located on the outer wall of the sorting tank 4 and near the top of the sorting tank 4. Since the second mixture inside the sorting tank 4 flows upwards, the location of the first output port 8 near the top of the sorting tank 4 maximizes the acquisition of the second mixture that meets the needs of the cementing operation. The nanoparticles in the collected second mixture have a particle size smaller than the target particle size, which is beneficial for improving the utilization and conversion rate of the cementing slurry. In a specific example, with the continuous input of overflow fluid, the second mixture inside the sorting tank 4 overflows into the overflow tank 5 through the first output port 8. The nanoparticles in this overflow tank are smaller than the target particle size, while nanoparticles larger than the target particle size settle against the current, thus achieving overflow classification of the cementing slurry, avoiding mixing between different products obtained from classification, and improving the overflow classification effect.

[0040] Please refer to several embodiments of the present invention. Figure 1-3 The second outlet 7 is located near the bottom of the sorting tank 4. The second mixture in the sorting tank 4 flows upward. The first outlet 8 is located at the top of the sorting tank 4, and the second outlet 7 is located at the bottom of the sorting tank 4. The second mixture that meets the particle size requirements continues to move upward and is output from the first outlet 8. The nanoparticles that do not meet the particle size requirements settle against the current and are output from the second outlet 7. This ensures the overflow classification of the cement slurry and avoids the mixing problem between the two.

[0041] Please refer to several embodiments of the present invention. Figure 1 The second input interface 6 is located on the outer wall of the sorting tank 4 and is positioned closer to the bottom of the sorting tank 4 than the top. The second input interface 6 is used to introduce nanoparticle slurry into the sorting tank 4. The nanoparticle slurry is then mixed again with the first mixture obtained by the initial mixing of the overflow liquid and the dispersion liquid. Therefore, the second input interface 6 is located near the bottom of the sorting tank 4 to ensure sufficient mixing of the nanoparticle slurry and the first mixture, thereby improving the overflow classification effect.

[0042] Please refer to several embodiments of the present invention. Figure 1The first input interface 2 includes an overflow interface 21 for receiving overflow liquid and a dispersion interface 22 for receiving dispersion liquid. The interfaces for receiving overflow liquid and dispersion liquid are input through different interfaces, allowing for more precise adjustment of the flow rates of the overflow liquid and dispersion liquid. The flow rate of the overflow liquid can be dynamically adjusted according to actual grading requirements without affecting the input of the dispersion liquid.

[0043] Please refer to several embodiments of the present invention. Figure 1 The cross-sectional area of ​​the overflow fluid interface 21 is larger than that of the dispersion fluid interface 22. Appropriately increasing the cross-sectional area of ​​the overflow fluid interface 21 can increase the flow rate of the overflow fluid, which is beneficial to improving the efficiency of overflow grading of cement slurry.

[0044] Please refer to several embodiments of the present invention. Figure 2 , Figure 2 The diagram shown illustrates the structure of a diversion assembly according to another embodiment of the present invention. The diversion assembly 3 includes a storage cylinder 31 and a support cylinder 32. The storage cylinder 31 is located on the base and communicates with the first input interface 2. The storage cylinder 31 is used to mix the overflow liquid and the dispersion liquid to obtain a first mixture and to temporarily store the first mixture. The support cylinder 32 is located between the storage cylinder 31 and the sorting tank 4, and both ends of the support cylinder 32 are respectively connected to the storage cylinder 31 and the sorting tank 4. The cooperation between the storage cylinder 31 and the support cylinder 32 ensures that the overflow liquid and the dispersion liquid are initially mixed evenly and thoroughly, so as to ensure that they can be further mixed with the nanoparticle slurry to achieve the overflow classification effect.

[0045] Please refer to several embodiments of the present invention. Figure 1-2 The support cylinder 32 includes an overflow pipe 33, which is disposed inside the support cylinder 32. The lower port of the overflow pipe 33 is connected to the storage cylinder 31, and the upper port of the overflow pipe 33 is connected to the bottom of the sorting tank 4. In a specific example, the storage cylinder 31 receives the overflow liquid and dispersion liquid input from the first input interface 2 and initially mixes them. As the overflow liquid continues to be input, the first mixture in the storage cylinder 31 gradually overflows to the overflow pipe 33 inside the support cylinder. The overflow pipe 33 ensures that the first mixture overflows to the bottom of the sorting tank 4 when the liquid capacity is saturated. Overflowing the first mixture to the bottom of the sorting tank 4 through the overflow pipe 33 avoids the problem of a large amount of the first mixture being input into the sorting tank 4 at one time, thus avoiding uneven mixing of the first mixture and the nanoparticle slurry and improving the uniform mixing of the first mixture and the nanoparticle slurry.

[0046] According to several embodiments of the present invention, Figure 3 The diagram shown illustrates the structure of a one-way valve and a flow guide plate according to another embodiment of the present invention. Please refer to [the diagram]. Figure 1-3The upper port of the overflow pipe 33 is connected to the bottom of the sorting tank 4 via a one-way valve 34. The one-way valve 34 effectively avoids the possibility of liquid backflow and achieves effective isolation between the first mixture and the second mixture to ensure the subsequent grading effect.

[0047] Please refer to several embodiments of the present invention. Figure 1-3 The one-way valve 34 includes an output valve port 341, which is located on the side of the upper port of the one-way valve 34. The output valve port 341 can ensure that the first mixture in the overflow pipe 33 overflows into the bottom of the sorting tank 4 without overflowing back from the sorting tank 4 into the overflow pipe 33.

[0048] Please refer to several embodiments of the present invention. Figure 1-3 The output valve port 341 is located below the second input interface 6. In a specific example, the second input interface 6 is used to input the nanoparticle slurry into the sorting tank 4, and the output valve port 341 is used to output the first mixture. The output valve port 341 is located below the second input interface 6, which can improve the mixing effect of the first mixture and the nanoparticle slurry and avoid uneven mixing. In a specific example, the nanoparticle slurry is input into the sorting tank 4 from the second input interface 6. The output valve port 341 is located lower than the second input interface 6. The nanoparticle slurry in the sorting tank 4 is above the first mixture. The first mixture flows upward and mixes thoroughly with the nanoparticle slurry to dilute the nanoparticles, so that nanoparticles smaller than the target particle size overflow downstream, and nanoparticles larger than the target particle size settle upstream. Agglomerated nanoparticles pass through the input position of the first mixture during the settling process, which helps to remove the influence of agglomeration.

[0049] Please refer to several embodiments of the present invention. Figure 1-3 There are multiple overflow pipes 33, which are evenly distributed inside the support cylinder 32. In a specific example, when the overflow liquid delivery rate reaches a stable level, the multiple overflow pipes 33 evenly arranged inside the support cylinder 32 achieve uniform delivery of the first mixture. The multiple overflow pipes 33 effectively reduce the flow rate of the first mixture delivered from the overflow pipes 33 into the sorting tank 4, avoid significant impact from localized sorting fluid environments, and reduce the impact of agitation during the input of the first mixture.

[0050] Please refer to several embodiments of the present invention. Figure 1-3 There are multiple one-way valves 34, and they are evenly distributed among each other. Corresponding to the number of overflow pipes 33, the multiple one-way valves 34 and their even distribution ensure uniform delivery of the first mixture and effectively reduce the flow rate of the first mixture to the sorting tank 4, avoiding the adverse effects of excessive local flow rate causing input agitation.

[0051] Please refer to several embodiments of the present invention. Figure 1-3 The number of output valve ports 341 is multiple, and the valve ports of adjacent output valve ports 341 are randomly arranged facing each other. The valve ports of adjacent output valve ports 341 are not aligned and are evenly distributed at the bottom of the sorting tank 4. When the first mixture is output, each output valve port 341 can form convection with each other, which is conducive to further and more thoroughly and evenly mixing the first mixture. At the same time, the random arrangement of the valve ports of adjacent output valve ports 341 can prevent the first mixture from flowing straight upward, thereby effectively avoiding local flow differences in the vertical direction, avoiding disruption of the uniform overflow environment, and ensuring the overflow effect.

[0052] Please refer to several embodiments of the present invention. Figure 1-3 The sorting tank 4 includes: a second output port 7 disposed on the outer wall of the sorting tank 4 and located below the second input port 6; and a guide plate 35 disposed between the inner walls of the sorting tank 4, with the plane of the guide plate 35 inclined towards the second output port. The second output port 7 is used to discharge the nanoparticles settling downwards in the sorting tank 4, and the guide plate 35 can guide the nanoparticles deposited thereon. As the overflow fluid is continuously input, nanoparticles larger than the target particle size in the sorting tank 4 settle downwards to the guide plate 35, and are guided by the guide plate 35 to the second output port 7, from which they are discharged. The cooperation between the second output port 7 and the guide plate 35 enables the discharge of nanoparticles that do not meet the requirements of the cementing operation and their isolation from the second mixture that meets the requirements of the cementing operation.

[0053] Please refer to several embodiments of the present invention. Figure 1-3 The one-way valve 34 passes through the guide plate 35, and there is a height difference between the output valve port 341 and the upper surface of the guide plate 35. The height difference between the output valve port 341 and the upper surface of the guide plate 35 can effectively reduce the floating of nanoparticles that have settled on the guide plate 35, so as to effectively ensure that the settled nanoparticles are discharged through the second output port 7.

[0054] Please refer to several embodiments of the present invention. Figure 1-3 The guide plate 35 includes a guide channel 351, which is disposed on the upper surface of the guide plate 35 and inclined towards the second output port. The guide channel 351 can guide the flow direction of the settled particles to ensure that the nanoparticles settled in the sorting tank 4 can flow to the second output port 7 for discharge. In a specific example, since a large number of settled nanoparticles will accumulate at the bottom of the sorting tank 4, the settled silica particles will accumulate on the guide plate 35. One end of the guide channel 351 facing the second output port 7 is conducive to transporting the nanoparticles accumulated on the guide plate 35 to the second output port 7 and discharging them, thereby improving the classification effect.

[0055] Please refer to several embodiments of the present invention. Figure 1-3 The one-way valve 34 does not intersect with the flow guide channel 351. The fact that the flow guide channel 351 does not intersect with the one-way valve 34 can effectively avoid seepage problems in the flow guide plate 35, thereby improving the overflow effect and the classification efficiency.

[0056] Please refer to several embodiments of the present invention. Figure 1-3 The number of flow channels 351 is multiple. Setting the number of flow channels 351 to multiple can effectively improve the flow efficiency of guiding the settled nanoparticles to the second output port 7.

[0057] A second aspect of the present invention provides a method for classifying cement slurry overflow. Figure 4 A flowchart of a cement slurry overflow classification method provided by an embodiment of the present invention is shown, as follows: Figure 4 As shown, the following steps are performed using a cement slurry overflow grading device as described in any of the above: S201, connect the first input interface to the overflow and dispersion supply source of cement slurry, and connect the second input interface to the nanoparticle slurry supply source; S202 connects the first output port to a nanoparticle recovery source and the second output port to a cementing source for cementing operations.

[0058] The above-mentioned overflow classification method for cement slurry ensures that the nanoparticle slurry is fully mixed and dispersed with the overflow liquid and dispersion liquid of the cement slurry, thereby achieving overflow classification of the cement slurry and improving the overflow classification effect of the cement slurry.

[0059] The control unit mentioned in the above-disclosed documents may include a processor and a memory, and may also include input devices and output devices. The processor, memory, input devices, and output devices may be connected via a bus or other means. The input devices may receive input digital or character information, and generate signal inputs related to user settings and function control in the present invention. The output devices may include display devices such as a screen.

[0060] Memory, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the scheme of this application. Memory may include a program storage area and a data storage area, wherein the program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created based on the use of the scheme of this invention, etc. Furthermore, memory may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the local module via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The processor executes various functional applications and data processing by running non-volatile software programs, instructions, and modules stored in the memory, thereby implementing the methods described in the above method embodiments.

[0061] Those skilled in the art will also understand that the various exemplary logic blocks, modules, circuits, and algorithm steps described in conjunction with the disclosure herein can be implemented as electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, the functionality of various illustrative components, modules, circuits, and steps has been generally described. Whether this functionality is implemented as software or as hardware depends on the specific application and the design constraints imposed on the system as a whole. Those skilled in the art can implement the functionality described herein in various ways for each specific application, but such implementation should not be construed as departing from the scope of the embodiments disclosed herein.

[0062] It should be understood that, where there is no conflict, all the embodiments, features, and advantages described above with respect to the cementing slurry overflow classification device 100 according to the first aspect of the present invention are equally applicable to the cementing slurry overflow classification method according to the other aspect of the present invention. That is, all the embodiments and variations thereof described above can be directly transferred and incorporated herein. For the sake of brevity, they will not be repeated here.

[0063] The above are exemplary embodiments disclosed in this invention. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments of this invention as defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this invention may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular number.

[0064] It should be understood that, as used herein, the singular form “a” is intended to include the plural form as well, unless the context clearly supports an exception. It should also be understood that, as used herein, “and / or” refers to any and all possible combinations of one or more of the associated listed items.

[0065] The embodiment numbers disclosed in the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0066] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0067] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of different aspects of the invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A cement slurry overflow grading device, characterized in that, include: A base, on which a first input interface is provided, the first input interface being used to receive overflow fluid and dispersion fluid of cementing slurry; A diversion component is installed on the upper part of the base and connected to the first input interface, used to mix the overflow liquid and dispersion liquid of the cementing slurry to obtain a first mixture; A sorting tank is installed on the upper part of the diversion assembly and communicates with the diversion assembly. The sorting tank is provided with a second input interface, a first output port and a second output port. The first output port is located above the second input interface and the second output port is located below the second input interface. The sorting tank is used to mix a first mixture overflowing from the upper end of the diversion assembly and a nanoparticle slurry input through the second input interface to obtain a second mixture. The second mixture overflows through the first output port and the settled nanoparticles are output through the second output port.

2. The cement slurry overflow grading device according to claim 1, characterized in that, The cement slurry overflow grading device also includes: An overflow tank is connected to the first output port and is used to collect the second mixture that overflows through the first output port.

3. The cement slurry overflow grading device according to claim 1, characterized in that, The first output port is located on the outer wall of the sorting tank and near the top of the sorting tank.

4. The cement slurry overflow grading device according to claim 1, characterized in that, The second output port is located on the outer wall of the sorting tank and near the bottom of the sorting tank.

5. The cement slurry overflow grading device according to claim 1, characterized in that, The first input interface includes an overflow interface for receiving the overflow liquid and a dispersion interface for receiving the dispersion liquid.

6. The cement slurry overflow grading device according to claim 5, characterized in that, The cross-sectional area of ​​the overflow interface is larger than that of the dispersion interface.

7. The cement slurry overflow grading device according to claim 1, characterized in that, The splitter component includes: A storage cylinder is located on the base and communicates with the first input interface. The storage cylinder is used to mix the overflow liquid and the dispersion liquid to obtain a first mixture and to temporarily store the first mixture. A support cylinder is located between the storage cylinder and the sorting tank, and both ends of the support cylinder are connected to the storage cylinder and the sorting tank, respectively.

8. The cement slurry overflow grading device according to claim 7, characterized in that, The support cylinder includes: An overflow pipe is disposed inside the support cylinder, the lower port of the overflow pipe is connected to the storage cylinder, and the upper port of the overflow pipe is connected to the bottom of the sorting tank.

9. The cement slurry overflow grading device according to claim 8, characterized in that, The upper port of the overflow pipe is connected to the bottom of the sorting tank via a one-way valve.

10. The cement slurry overflow grading device according to claim 9, characterized in that, The one-way valve includes: An output valve port is provided on the side of the upper port of the one-way valve, and is used to overflow the first mixture in the overflow pipe into the sorting tank when the hydraulic pressure in the one-way valve reaches a threshold.

11. The cement slurry overflow grading device according to claim 10, characterized in that, The output valve port is located below the second input port.

12. The cement slurry overflow grading device according to claim 10, characterized in that, There are multiple overflow pipes, which are evenly distributed inside the support cylinder.

13. The cement slurry overflow grading device according to claim 12, characterized in that, The outlet valves of adjacent overflow pipes are randomly oriented opposite each other.

14. The cement slurry overflow grading device according to claim 10, characterized in that, The sorting tank includes: A flow guide plate is disposed near the bottom of the sorting tank.

15. The cement slurry overflow grading device according to claim 14, characterized in that, The plane on which the guide plate is located is inclined toward the direction of the second output port.

16. The cement slurry overflow grading device according to claim 14, characterized in that, The one-way valve passes through the guide plate, and there is a height difference between the output valve port and the upper plane of the guide plate.

17. The cement slurry overflow grading device according to claim 14, characterized in that, The guide vane includes: One or more flow guide channels are disposed on the upper surface of the flow guide plate and the lower bottom of the one or more flow guide channels is inclined towards the second output port.

18. The cement slurry overflow grading device according to claim 17, characterized in that, The one-way valve does not intersect with the flow guide groove.

19. The cement slurry overflow grading device according to claim 17, characterized in that, The cement slurry overflow grading device also includes: A control unit is configured to control the flow rate of the overflow fluid received via the first input interface based on the target particle size range corresponding to the nanoparticles.

20. A method for classifying overflow of cement slurry in well cementing, characterized in that, This includes performing the following operations using the cement slurry overflow grading device as described in any one of claims 1 to 19: Connect the first input interface to the overflow and dispersion supply source of cement slurry, and connect the second input interface to the nanoparticle slurry supply source. The first output port is connected to a nanoparticle recovery source, and the second output port is connected to a cementing source for cementing operations.

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