Water supply device for producing mud cake toughening modifier
By designing a water supply device for the production of mud cake toughening improver, the design of water rotation and eccentric water effluent holes has been solved, and the effect of solid-liquid separation of mud cakes has been significantly improved and the cementing quality has been improved.
Patent Information
- Application Number
- CN202421716341.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-18
AI Technical Summary
In the production of mud cake toughening improver, when water filtration is performed by centrifugation, the separation effect is poor, resulting in incomplete solid-liquid separation of mud cake, affecting the cementing quality.
A water supply device for the production of mud cake toughening improver is designed, including a container, a water supply pipe and a stirring assembly. The stirring assembly rotates the water, and the outlet hole is arranged eccentrically with respect to the container. The collection assembly is located in the middle of the container for collecting solid impurities with a density less than water.
Through the rotation of water and the design of eccentric water outlet holes, impurities with higher density are close to the inner side wall of the container, and impurities with lower density are collected near the axis. The separation and filtration effect is significantly improved, reducing the impurity content in the water of the water outlet hole.
Smart Images
Figure CN222935207U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of production of mud cake toughening and improving agents, and particularly relates to a water supply device for producing mud cake toughening and improving agents. Background Art
[0002] A mud cake is a solid-phase sediment deposited on a filter medium (wellbore wall, ground surface or filter paper) during the filtration of drilling fluid. After oil well drilling, a mud cake with a certain thickness and poor strength will form on the wellbore wall and the casing wall. The presence of the mud cake causes poor solidification and cementation between the wellbore wall and the casing wall and the cement slurry, ultimately resulting in a decrease in the cementation strength of the cementing interface and seriously affecting the cementing quality. The use of a mud cake toughening and improving agent is used to improve the toughness of the formed mud cake.
[0003] In related technologies, water is the solute of the mud cake improving and toughening agent. During the production process of the mud cake improving and toughening agent, water needs to be filtered to remove solid impurities in the water. The centrifugation method is a commonly used solid-liquid separation method and is thus used for water filtration.
[0004] According to the principle of the centrifugal phenomenon, solid particles with a density greater than that of water will gradually move closer to the part of the container far from the axis, while solid particles with a density less than that of water will gradually move closer to the axis of the container and are likely to flow out of the water outlet hole with the water flow, resulting in poor separation effect. Utility Model Content
[0005] In order to improve the above problems, the present application provides a water supply device for producing mud cake toughening and improving agents.
[0006] The water supply device for producing mud cake toughening and improving agents provided by the present application adopts the following technical solutions:
[0007] A water supply device for producing mud cake toughening and improving agents includes a container, a water supply pipe and a stirring assembly. The stirring assembly is located inside the container and is used to rotate the water in the container. An outlet hole is opened at the bottom of the container. The water supply pipe is connected to the container and communicates with the outlet hole. The outlet hole is eccentrically arranged relative to the container. A collection assembly for collecting solid particles is arranged in the middle of the container.
[0008] By adopting the above technical solutions, during the rotation of the water in the container, impurities with a larger density are located at positions close to the inner side wall of the container, and impurities with a smaller density are located at positions close to the axis of the container and are collected by the collection assembly. The amount of impurities in the water at the position where the outlet hole is located is less, and the separation and filtration effect is higher.
[0009] Preferably, a drainage convex ring is coaxially arranged on the inner bottom wall of the container. The outlet hole is located on the drainage convex ring. Slag collection slopes are arranged on both the side of the drainage convex ring facing the axis of the container and the side facing the side wall of the container.
[0010] By adopting the above technical solution, the height of the water outlet is higher than the bottom wall of the container. During the process of discharging water through the water outlet, the water level in the container gradually drops. When the water level is lower than the orifice of the drain hole, the remaining water with more impurities accumulates beside the slag collection slope.
[0011] Preferably, the collection assembly includes a central shaft column and grooving edges. The central shaft column is fixedly connected to the bottom wall of the container and is coaxial with the container. There are multiple grooving edges, all of which are fixedly connected to the side wall of the central shaft column. A collection groove is formed between the grooving edges and the side wall of the central shaft column.
[0012] Preferably, the length direction of the collection groove is the circumferential direction of the central shaft column.
[0013] By adopting the above technical solution, as the water level continuously drops, solid impurities close to the central shaft column will stagnate in the collection groove during the falling process.
[0014] Preferably, the length trajectory of the collection groove is a spiral line around the central shaft column. The notch direction of the collection groove is opposite to the water flow direction. Along the water flow direction, the collection groove slopes upward.
[0015] By adopting the above technical solution, as the water level gradually drops, solid impurities close to the central shaft column either remain on the water surface in the collection groove or adhere to the groove wall of the collection groove, and finally fall to the middle position of the inner bottom wall of the container.
[0016] Preferably, the stirring assembly includes a mating ring and paddle plates. The mating ring is sleeved outside the central shaft column and they are coaxial. The paddle plates are fixedly connected to the outer wall of the mating ring, and the plate surface of the paddle plates is parallel to the axis of the mating ring.
[0017] By adopting the above technical solution, when the mating ring rotates, the paddle plates generate a circumferential thrust on the water, causing the water to rotate.
[0018] Preferably, a slag storage ring groove is provided at the junction of the inner side wall and the inner bottom wall of the container. The notch of the slag storage ring groove communicates with the inner cavity of the container, and the notch width of the slag storage ring groove is less than 1 cm.
[0019] By adopting the above technical solution, during the rotation of the water in the container, solid impurities with a density greater than that of water gradually approach the inner wall of the container under the action of centrifugal force and have a tendency to sink, and finally enter the slag storage ring groove. Since the notch of the slag storage ring groove is relatively narrow, the influence of the rotating water flow in the container on the space in the slag storage ring groove is limited, reducing the probability of solid impurities overflowing from the slag storage ring groove.
[0020] Preferably, a slag cleaning hole is opened on the bottom wall of the container and at a position lower than the slag collection slope.
[0021] By adopting the above technical solution, during the filtering process, after the water level in the container is lower than the water outlet hole, the water outlet hole stops draining, and then the water outlet hole is closed, and the slag cleaning hole is opened to drain the water with impurities remaining in the container.
[0022] In summary, the present application includes at least one of the following beneficial technical effects:
[0023] 1. Through the setting of the relatively eccentric water outlet hole and the collection assembly, during the rotation of the water in the container, impurities with a larger density are located near the inner side wall of the container, and impurities with a smaller density are located near the axis of the container and are collected by the collection assembly. The amount of impurities in the water at the position of the water outlet hole is less, and the separation and filtration effect is higher;
[0024] 2. Through the setting of the drainage convex ring and the slag collection slope, during the water discharge process, the water level continuously drops. When the water level is lower than the drainage convex ring, it cannot be discharged through the water outlet hole, and the water with more impurities near the edge and in the middle remains under the slag collection slope. Description of the Drawings
[0025] Figure 1 is a schematic cross-sectional view showing the structure of the water supply device for the production of the mud cake toughening improver in the first embodiment of the present application.
[0026] Figure 2 is a schematic view showing the structure of the stirring assembly and the collection assembly in the second embodiment of the present application.
[0027] Description of the reference numerals: 1. Container; 11. Water outlet hole; 12. Drainage convex ring; 13. Slag collection slope; 14. Slag storage ring groove; 15. Slag cleaning hole; 16. Water supply pipe; 161. Water supply pump; 2. Stirring assembly; 21. Fitting ring; 22. Blade plate; 3. Collection assembly; 31. Central axis column; 32. Groove forming edge; 321. Collection groove. Detailed Description of the Embodiment
[0028] The following is a further detailed description of the present application in conjunction with the attached Figure 1-2 drawings.
[0029] Embodiment 1:
[0030] The first embodiment of the present application discloses a water supply device for the production of a mud cake toughening improver, as Figure 1As shown in the figure, it includes a container 1, a water supply pipe 16, a stirring assembly 2 and a collection assembly 3. The container 1 is used to hold the water to be filtered. The stirring assembly 2 is used to stir the water and make it rotate. The collection assembly 3 is used to collect the solid impurities with a smaller density at the axial center of the container 1. The container 1 is in the shape of a cylindrical barrel. An outlet hole 11 is opened at the bottom of the container 1. The water after filtration is discharged from the container 1 through the outlet hole 11. The water supply pipe 16 is connected to the container 1 and communicated with the outlet hole 11, that is, the water enters the water supply pipe 16 after leaving the container 1 and then flows to the subsequent production stations through the water supply pipe 16. A water supply pump 161 is arranged on the water supply pipe 16 to improve the water flow speed and flow stability.
[0031] As Figure 1 shown in the figure, a drainage convex ring 12 is integrally formed on the inner bottom wall of the container 1 coaxially. There are multiple outlet holes 11, all of which are opened on the drainage convex ring 12. The multiple outlet holes 11 are arranged in an array around the axis of the container 1, that is, the position of the outlet holes 11 is higher than the bottom wall of the container 1. The water supply pipe 16 between the water supply pump 161 and the container 1 forms multiple branch pipes. The number of branch pipes is the same as the number of outlet holes 11 and they are in one-to-one correspondence and communication. On both the side of the drainage convex ring 12 facing the axis of the container 1 and the side facing the side wall of the container 1, slag collection slopes 13 are formed. During the process of discharging water through the outlet holes 11, the water level in the container 1 gradually drops. When the water level is lower than the orifice of the drainage hole, the remaining water accumulates beside the slag collection slope 13.
[0032] As Figure 1 shown in the figure, the collection assembly 3 includes a central shaft column 31. The central shaft column 31 is fixedly connected to the bottom wall of the container 1 and is coaxial with the container 1. The stirring assembly 2 includes a mating ring 21 and paddle plates 22. The mating ring 21 is sleeved outside the central shaft column 31 and they are coaxial. The paddle plates 22 are fixedly connected to the outer wall of the mating ring 21. The plate surface of the paddle plates 22 is parallel to the axis of the mating ring 21. A motor for driving the mating ring 21 to rotate is arranged at the top of the container 1. When the mating ring 21 rotates, the paddle plates 22 generate a circumferential thrust on the water, thereby driving the water to rotate. There are multiple mating rings 21. The multiple mating rings 21 are arranged along the axial direction of the central shaft column 31. Adjacent two mating rings 21 are connected by a rigid rod to achieve linkage.
[0033] As Figure 1 shown in the figure, the collection assembly 3 further includes multiple slot-forming edges 32. The slot-forming edges 32 are all fixedly connected to the side wall of the central shaft column 31. A collection groove 321 is formed between the slot-forming edges 32 and the side wall of the central shaft column 31. The length direction of the collection groove 321 is the circumferential direction of the central shaft column 31, that is, each slot-forming edge 32 is located at a different height of the container 1. During the rotation of the water in the container 1, the solid particles with a density smaller than that of the water will gradually approach the axial center of the container 1, that is, approach the central shaft column 31 and have an upward trend. As the water level continuously drops, the solid impurities close to the central shaft column 31 will stagnate in the collection groove 321 during the falling process.
[0034] As Figure 1 shown, a slag storage ring groove 14 is provided at the junction of the inner side wall and the inner bottom wall of the container 1. The notch of the slag storage ring groove 14 communicates with the inner cavity of the container 1, and the width of the notch of the slag storage ring groove 14 is less than 1 cm. During the rotation of the water in the container 1, the solid impurities with a density greater than that of water gradually approach the inner wall of the container 1 under the action of centrifugal force and tend to sink, and finally enter the slag storage ring groove 14. Since the notch of the slag storage ring groove 14 is relatively narrow, the influence of the rotating water flow in the container 1 on the space in the slag storage ring groove 14 is limited, reducing the probability of the solid impurities overflowing from the slag storage ring groove 14.
[0035] As Figure 1 shown, a slag cleaning hole 15 is provided on the bottom wall of the container 1 at a position lower than the slag collection slope 13. The slag cleaning hole 15 is opened in the middle of the bottom wall of the container 1 and at the bottom of the slag storage ring groove 14. During the filtering process, after the water level in the container 1 is lower than the water outlet hole 11, the water outlet hole 11 stops draining, and then the water outlet hole 11 is closed and the slag cleaning hole 15 is opened to drain the remaining water with impurities in the container 1.
[0036] Embodiment 2:
[0037] As Figure 2 shown, the difference from Embodiment 1 is that in this embodiment, the length trajectories of each grooving edge 32 and the formed collection groove 321 are spiral lines around the central axis column 31. A plurality of grooving edges 32 are arranged in a circular array around the central axis column 31. In this embodiment, the number of grooving edges 32 is three, and the inner wall of the mating ring 21 is in contact with the edge of the grooving edge 32 away from the central axis column 31. The notch orientation of the collection groove 321 is opposite to the water flow direction, and along the water flow direction, the collection groove 321 slopes upward; during the rotation of the water, the solid impurities with a relatively small density approach the central axis column 31 and the grooving edge 32. As the water level gradually drops, the solid impurities close to the central axis column 31 either stay on the water surface in the collection groove 321 or adhere to the groove wall of the collection groove 321, and finally fall into the inner edge space of the drainage convex ring 12.
[0038] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.
Claims
1. A water supply device for producing a mud cake toughening modifier, comprising a container (1), a water supply pipe (16) and a stirring assembly (2), wherein the stirring assembly (2) is located in the container (1), and the stirring assembly (2) is used to rotate the water in the container (1), and a water outlet (11) is provided at the bottom of the container (1), and the water supply pipe (16) is connected to the container (1) and communicated with the water outlet (11), characterized in that: The water outlet hole (11) is arranged eccentrically relative to the container (1), and a collecting component (3) for collecting solid particles is arranged in the middle of the container (1).
2. A water supply device for producing mud cake toughening modifier according to claim 1, characterized in that: The inner bottom wall of the container (1) is coaxially provided with a drainage convex ring (12), the water outlet hole (11) is located on the drainage convex ring (12), and the drainage convex ring (12) is provided with a slag collecting slope (13) on the side facing the axis of the container (1) and the side facing the side wall of the container (1).
3. A water supply device for producing a mud cake toughening modifier according to claim 1 or 2, characterized in that: The collecting assembly (3) comprises a central axis column (31) and a groove edge (32); the central axis column (31) is fixedly connected to the bottom wall of the container (1) and is coaxial with the container (1); a plurality of groove edges (32) are provided and are all fixedly connected to the side wall of the central axis column (31); a collecting groove (321) is formed between the groove edge (32) and the side wall of the central axis column (31).
4. A water supply device for producing mud cake toughening modifier according to claim 3, characterized in that: The length direction of the collecting groove (321) is the circumferential direction of the central axis column (31).
5. A water supply device for producing mud cake toughening modifier according to claim 3, characterized in that: The length trajectory of the collecting groove (321) is a spiral line around the central axis column (31), and the notch of the collecting groove (321) faces the opposite direction of the water flow direction. Along the water flow direction, the collecting groove (321) is inclined upward.
6. A water supply device for producing mud cake toughening modifier according to claim 3, characterized in that: The stirring assembly (2) comprises a matching ring (21) and a paddle plate (22); the matching ring (21) is sleeved outside the central axis column (31) and the two are coaxial; the paddle plate (22) is fixedly connected to the outer wall of the matching ring (21); and the plate surface of the paddle plate (22) is parallel to the axis of the matching ring (21).
7. A water supply device for producing mud cake toughening modifier according to claim 1, characterized in that: A slag storage annular groove (14) is provided at the junction of the inner side wall and the inner bottom wall of the container (1), the notch of the slag storage annular groove (14) is connected to the inner cavity of the container (1), and the notch width of the slag storage annular groove (14) is less than 1 cm.
8. A water supply device for producing mud cake toughening modifier according to claim 7, characterized in that: A slag cleaning hole (15) is provided on the bottom wall of the container (1) at a position lower than the slag collecting slope (13).