Oil-based drilling fluid storage tank

Abstract

The oil-based drilling fluid storage tank comprises an upper tank body, a lower tank body and a tank cover which are detachably connected, the oil-based drilling fluid storage tank further comprises a stirring assembly and a cleaning assembly, a plurality of feeding openings are formed in the tank cover at intervals, the stirring assembly is arranged on the tank cover, and a scraping plate is arranged on the stirring assembly; a water inlet is formed in the side wall of the tank cover, the cleaning assembly is communicated with an external liquid supply mechanism through the water inlet, the cleaning assembly is detachably installed on the stirring assembly and can rotate relative to the tank cover, and a liquid outlet is formed in the bottom of the lower tank body. The inner walls of the upper tank body and the lower tank body can be washed through the cleaning assembly, so that the upper tank body and the lower tank body are cleaned and maintained, and the service life of the upper tank body and the lower tank body is prolonged; the upper tank body, the lower tank body and the tank cover can be subpackaged and carried, the occupied space in the carrying process is reduced, and transportation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling engineering, in particular to an oil-based drilling fluid storage tank. Background Art

[0002] As an important type of drilling fluid, oil-based drilling fluid has the advantages of high temperature resistance, resistance to salt and calcium erosion, being beneficial to wellbore stability, good lubricity, and little damage to oil and gas layers, and is widely used in the process of oil and gas exploitation. Oil-based drilling fluid is mainly a sol suspension mixing system with diesel or crude oil as the dispersion medium and weighting agents, various chemical treatment agents, water, etc. as the dispersed phase. With the continuous development of drilling technology, the drilling depth is continuously increased, and the consumption of drilling fluid also increases accordingly. The development and application of new drilling fluids make the composition of drilling fluid more complex. Therefore, it is particularly important to design and optimize the storage and transportation devices of drilling fluid.

[0003] The applicant retrieved and obtained the following prior art. Specifically, the patent with the publication number CN215353058U discloses a drilling fluid mixing tank with high mixing efficiency, including a base and a mixing tank. The top of the base is fixedly connected to the bottom of the mixing tank. The base includes a bottom plate and a support frame, and the top of the bottom plate is fixedly connected to the bottom of the support frame. The mixing tank includes a tank body and a top cover. The top of the tank body is fixedly connected to the bottom of the top cover, and a solid feed pipe is arranged on the top of the top cover. This utility model can better prevent the problem that the powder adheres to the inner wall of the feed pipe due to the humidity of the feed pipe by separate feeding, enabling raw materials to enter from different feed pipes. By setting a forward rotation plate and a reverse rotation plate, it avoids the phenomenon of uneven rotation and stirring caused by the raw materials rotating in the same direction, reducing the mixing efficiency of stirring. Through the combined setting of stirring blades, dividing blades, and swinging balls, the dividing blades swing simultaneously to avoid the adhesion of raw materials to the outer wall of the stirring blades.

[0004] It can be seen from the above patent that although the drilling fluid mixing tank with high mixing efficiency can avoid the uneven rotation and stirring caused by the raw materials rotating in the same direction and reduce the mixing efficiency of stirring, and can avoid the adhesion of raw materials to the outer wall of the stirring blades, in the actual use process, due to some components in the drilling fluid having a corrosive effect on the tank body material, long-term accumulation will lead to problems such as thinning and perforation of the tank body wall. Since this drilling fluid mixing tank with high mixing efficiency does not have a corresponding cleaning mechanism, it is not convenient to clean and maintain the tank body, which not only shortens the service life of the tank body, but also easily causes the leakage of drilling fluid, posing a threat to the environment and safety. Moreover, the tank body is of an integral structure, which is not convenient for transportation and handling. Summary of the Utility Model

[0005] The main purpose of the present utility model is to provide an oil-based drilling fluid storage tank, aiming to solve the problems that the existing oil-based drilling fluid storage tank is not convenient for cleaning and maintaining the tank body, which not only shortens the service life of the tank body, but also easily causes leakage of the drilling fluid, and is not convenient for transportation and handling.

[0006] To achieve the above object, the present utility model provides an oil-based drilling fluid storage tank, which includes a detachable upper tank body, a lower tank body and a tank cover, and further includes a stirring assembly and a cleaning assembly. A plurality of feeding ports are spaced apart on the tank cover. The stirring assembly is arranged on the tank cover and is used for stirring and mixing the drilling fluid in the upper tank body and the lower tank body. A scraping plate is arranged on the stirring assembly and abuts against the inner walls of the upper tank body and the lower tank body. An inlet is opened on the side wall of the tank cover. The cleaning assembly is used for cleaning the inner cavities of the upper tank body and the lower tank body. The cleaning assembly is communicated with an external liquid supply mechanism through the inlet, and the cleaning assembly is detachably installed on the stirring assembly and can rotate relative to the tank cover. An outlet is opened at the bottom of the lower tank body.

[0007] Preferably, a water storage tank is formed on one side of the tank cover facing the upper tank body. The cleaning assembly includes a water delivery pipe, a water distribution plate and a spray head. The two ends of the water delivery pipe are respectively communicated with the inlet and the water storage tank. The water distribution plate is detachably installed on the stirring assembly and is used for closing the notch of the water storage tank. A plurality of branch pipes for installing the spray heads are arranged at intervals along the circumferential direction of the outer wall of the water distribution plate.

[0008] Preferably, at least two spray heads are spaced apart along the respective extending directions of the plurality of branch pipes.

[0009] Preferably, the stirring assembly includes a motor, a rotating shaft and a plurality of stirring blades. The motor is vertically arranged on the tank cover. One end of the rotating shaft is detachably connected to the power output end of the motor. The other end of the rotating shaft passes through the water storage tank and the water distribution plate and extends into the upper tank body and the lower tank body. The water distribution plate is detachably connected to the rotating shaft. The plurality of stirring blades are evenly and spacedly arranged on the rotating shaft.

[0010] Preferably, two connecting rods are also spacedly arranged on the rotating shaft. The two ends of the two connecting rods are respectively detachably connected to the two ends of the two scraping plates in a one-to-one correspondence. A reinforcing rod is also arranged on the rotating shaft. The reinforcing rod is located between the two connecting rods. The two ends of the reinforcing rod are detachably connected to the two scraping plates.

[0011] Preferably, annular protrusions are respectively formed at the top and bottom of the upper tank body. Annular grooves for the annular protrusions to extend into are opened on the tank cover and the lower tank body. A sealing ring is arranged in the annular groove.

[0012] Preferably, hoppers are provided at several of the feeding openings. An end cover is detachably installed at one end of the hopper away from the feeding opening, and anti-slip patterns are formed on the outer wall of the end cover.

[0013] Preferably, a side cover is provided on the outer wall of the lower tank body; a plurality of legs are evenly and spacedly arranged along the circumferential direction of the outer wall of the lower tank body.

[0014] Beneficial effects:

[0015] 1. In an oil-based drilling fluid storage tank of the present utility model, through the cleaning assembly, the inner walls of the upper tank body and the lower tank body can be flushed, realizing the cleaning and maintenance of the upper tank body and the lower tank body, preventing certain components in the drilling fluid from adhering to the inner walls of the upper tank body and the lower tank body after long-term use and causing corrosion, extending the service life of the upper tank body and the lower tank body, and effectively avoiding the situation that the tank wall becomes thinner due to corrosion and perforates, resulting in drilling fluid leakage.

[0016] 2. In an oil-based drilling fluid storage tank of the present utility model, through the scraper, the inner walls of the upper tank body and the lower tank body can be pushed and scraped, thereby preventing the preparation materials from adhering and accumulating on the inner walls of the upper tank body and the lower tank body, reducing the loss and waste of the preparation materials, and improving the stirring and mixing efficiency of the stirring assembly; at the same time, in the process of cleaning and maintenance of the present utility model, through the combined use of the scraper and the cleaning assembly, the cleaning effect on the upper tank body and the lower tank body can be further improved, and the use is reliable.

[0017] 3. In an oil-based drilling fluid storage tank of the present utility model, by respectively feeding a material for preparing drilling fluid through several feeding openings, not only can the feeding efficiency be improved, the preparation time of the drilling fluid be shortened, but also the cumulative error that is likely to occur when a single feeding opening is used to feed multiple types of materials can be effectively avoided, realizing the precise control of the input amount of the preparation materials, and ensuring the use performance and quality of the drilling fluid.

[0018] 4. During the transportation of an oil-based drilling fluid storage tank of the present utility model, by separately packing and transporting the upper tank body, the lower tank body and the tank cover, the space occupied during the handling of the present utility model can be reduced, facilitating transportation. Description of the drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1It is a schematic structural diagram of an oil-based drilling fluid storage tank according to an embodiment of the present utility model from a perspective;

[0021] Figure 2 It is a top view of an oil-based drilling fluid storage tank according to an embodiment of the present utility model;

[0022] Figure 3 It is Figure 2 a cross-sectional view taken at A-A in

[0023] Figure 4 It is Figure 3 a partial enlarged view at B in

[0024] Figure 5 It is a schematic diagram of a partial structure in an oil-based drilling fluid storage tank according to an embodiment of the present utility model.

[0025] In the figure: 1 - upper tank body; 2 - lower tank body; 3 - tank cover; 4 - feeding port; 5 - scraper; 6 - water inlet; 7 - liquid outlet; 8 - water storage tank; 9 - water delivery pipe; 10 - water distribution plate; 11 - spray head; 12 - branch pipe; 13 - motor; 14 - rotating shaft; 15 - stirring blade; 16 - connecting rod; 17 - reinforcing rod; 18 - annular protrusion; 19 - annular groove; 20 - sealing ring; 21 - hopper; 22 - end cover; 23 - side cover; 24 - support leg. Detailed implementation manners

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

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0028] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present application, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present application. In addition, in the description of the present application, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they should not be construed as indicating or implying relative importance.

[0030] In addition, in the description of the present application, if terms such as "horizontal" and "vertical" are used, it does not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0032] Embodiment 1:

[0033] The present utility model provides an oil-based drilling fluid storage tank.

[0034] In an embodiment of the present utility model, an oil-based drilling fluid storage tank includes a detachable upper tank body 1, a lower tank body 2 and a tank cover 3, and further includes a stirring assembly and a cleaning assembly. A plurality of feeding ports 4 are spaced apart on the tank cover 3. The stirring assembly is arranged on the tank cover 3 and is used for stirring and mixing the drilling fluid in the upper tank body 1 and the lower tank body 2. A scraping plate 5 that abuts against the inner walls of the upper tank body 1 and the lower tank body 2 is arranged on the stirring assembly; a water inlet 6 is opened on the side wall of the tank cover 3. The cleaning assembly is used for cleaning the inner cavities of the upper tank body 1 and the lower tank body 2. The cleaning assembly is communicated with an external liquid supply mechanism through the water inlet 6, and the cleaning assembly is detachably installed on the stirring assembly and can rotate relative to the tank cover 3. A liquid outlet 7 is opened at the bottom of the lower tank body 2.

[0035] Specifically, as Figures 1 to 5As shown, in a kind of oil-based drilling fluid storage tank of the present utility model, the detachable connection mode of the upper tank body 1, the lower tank body 2 and the tank cover 3 can adopt thread connection. Thread connection is convenient for disassembly and assembly, has a simple structure, and has high connection stability. Thus, the staff can disassemble and transport the upper tank body 1, the lower tank body 2 and the tank cover 3 separately, which can reduce the space occupied during the transportation of the present utility model and is convenient for transportation. Further, when the oil-based drilling fluid storage tank of the present utility model is in use, since a plurality of feeding ports 4 are opened on the tank cover 3, and each of the plurality of feeding ports 4 corresponds to a material for preparing drilling fluid, this can not only improve the feeding efficiency and shorten the preparation time of the drilling fluid, but also effectively avoid the cumulative error that is likely to occur when a single feeding port 4 is used to put multiple types of materials, realize the precise control of the input amount of the preparation materials, and ensure the service performance and quality of the drilling fluid.

[0036] It can be understood that when it is necessary to clean and maintain the upper tank body 1 and the lower tank body 2, since a water inlet 6 is opened on the side wall of the tank cover 3, the cleaning component can be communicated with an external liquid supply mechanism through the water inlet 6, and the cleaning component can rotate relative to the tank cover 3 under the action of the stirring component. The cleaning component can adopt a high-pressure nozzle 11 in the prior art, so that the cleaning component can flush the inner walls of the upper tank body 1 and the lower tank body 2, realize the cleaning and maintenance of the upper tank body 1 and the lower tank body 2, prevent some components in the drilling fluid from adhering to the inner walls of the upper tank body 1 and the lower tank body 2 after long-term use and cause corrosion, extend the service life of the upper tank body 1 and the lower tank body 2, and effectively avoid the situation that the tank wall becomes thin due to corrosion and perforates, resulting in the leakage of the drilling fluid. In addition, since a scraping plate 5 that abuts against the inner walls of the upper tank body 1 and the lower tank body 2 is also arranged on the stirring component, when the stirring component stirs and mixes the preparation materials, the scraping plate 5 can rotate relative to the tank cover 3 under the action of the stirring component, and then can push and scrape the inner walls of the upper tank body 1 and the lower tank body 2, thereby preventing the preparation materials from adhering and accumulating on the inner walls of the upper tank body 1 and the lower tank body 2, reducing the loss and waste of the preparation materials, and improving the stirring and mixing efficiency of the stirring component; at the same time, in the process of cleaning and maintaining the present utility model, the cooperation use of the scraping plate 5 and the cleaning component can further improve the cleaning effect on the upper tank body 1 and the lower tank body 2, and the use is reliable.

[0037] In an embodiment, a water storage tank 8 is formed on one side of the tank cover 3 facing the upper tank body 1. The cleaning component includes a water delivery pipe 9, a water distribution plate 10 and a nozzle 11. The two ends of the water delivery pipe 9 are respectively communicated with the water inlet 6 and the water storage tank 8. The water distribution plate 10 is detachably installed on the stirring component and is used to close the notch of the water storage tank 8. A plurality of branch pipes 12 for installing the nozzle 11 are arranged at intervals along the circumferential direction of the outer wall of the water distribution plate 10.

[0038] Specifically, as Figures 1 to 5As shown, since a water storage tank 8 is formed on one side of the tank lid 3 facing upward the tank body 1, both ends of the water delivery pipe 9 in the cleaning assembly are respectively communicated with the water inlet 6 and the water storage tank 8, so that the external liquid supply mechanism can deliver water into the water storage tank 8 under the action of the water delivery pipe 9. The structural design is simple and reasonable. Further, since the water distribution plate 10 is detachably installed on the stirring assembly, the detachable installation manner of the water distribution plate 10 and the stirring assembly can adopt threaded connection, which is convenient for disassembling and maintaining the water distribution plate 10; at the same time, the water distribution plate 10 can seal the notch of the water storage tank 8, thereby preventing water from leaking out of the water storage tank 8. It can be understood that since a plurality of branch pipes 12 for installing the spray heads 11 are arranged on the outer wall of the water distribution plate 10, when the stirring assembly rotates, the water distribution plate 10 can rotate synchronously with the stirring assembly. At this time, the spray heads 11 on the branch pipes 12 can uniformly rotate and wash the inner walls of the upper tank body 1 and the lower tank body 2, thereby improving the cleaning efficiency, ensuring the cleaning effect on the upper tank body 1 and the lower tank body 2, and being reliable in use.

[0039] In one embodiment, specifically, as Figure 1 and Figure 5 shown, at least two spray heads 11 are arranged at intervals along the respective extending directions of the plurality of branch pipes 12, so that not only can the inner walls of the upper tank body 1 and the lower tank body 2 be comprehensively washed, reducing the washing dead corners, but also the stirring assembly can be synchronously washed, further improving the cleaning and maintenance effect of the present utility model.

[0040] In one embodiment, the stirring assembly includes a motor 13, a rotating shaft 14 and a plurality of stirring blades 15. The motor 13 is vertically arranged on the tank lid 3. One end of the rotating shaft 14 is detachably connected to the power output end of the motor 13. The other end of the rotating shaft 14 passes through the water storage tank 8 and the water distribution plate 10 and extends into the upper tank body 1 and the lower tank body 2. The water distribution plate 10 is detachably connected to the rotating shaft 14. The plurality of stirring blades 15 are uniformly and spacedly arranged on the rotating shaft 14. Specifically, as Figure 1 and Figure 5 shown, by vertically arranging the motor 13 on the tank lid 3, the rotating shaft 14 detachably connected to the power output end of the motor 13 can extend into the upper tank body 1 and the lower tank body 2 along the vertical direction, and the rotating shaft 14 can rotate under the action of the motor 13. Since the water distribution plate 10 is detachably connected to the rotating shaft 14, the water distribution plate 10 and the plurality of spray heads 11 installed on its branch pipes 12 can all rotate synchronously with the rotating shaft 14, thereby realizing the comprehensive washing of the inner walls of the upper tank body 1 and the lower tank body 2 and the plurality of stirring blades 15. Further, by uniformly and spacedly arranging the plurality of stirring blades 15 on the rotating shaft 14, the preparation materials can be fully and uniformly mixed and stirred, so as to improve the processing quality of the drilling fluid.

[0041] In one embodiment, two connecting rods 16 are also arranged at intervals on the rotating shaft 14. The two ends of the two connecting rods 16 are detachably connected to the two ends of the two scraping plates 5 in a one-to-one correspondence. Moreover, a reinforcing rod 17 is also arranged on the rotating shaft 14. The reinforcing rod 17 is located between the two connecting rods 16, and the two ends of the reinforcing rod 17 are detachably connected to the two scraping plates 5. Specifically, as Figure 5 shown, the scraping plate 5 can be stably installed on the rotating shaft 14 through the two connecting rods 16, and the scraping plate 5 can rotate synchronously with the rotating shaft 14. The structural design is simple and reasonable. Further, the connection structural strength between the connecting rod 16 and the scraping plate 5 can be improved through the reinforcing rod 17, preventing the connecting rod 16 or the scraping plate 5 from being bent and deformed during the rotation and scraping process, ensuring the scraping effect of the scraping plate 5 on the preparation material, and prolonging the effective service life of the scraping plate 5.

[0042] In one embodiment, annular protrusions 18 are respectively formed at the top and bottom of the upper tank body 1. Annular grooves 19 for the annular protrusions 18 to extend into are formed on the tank cover 3 and the lower tank body 2, and a sealing ring 20 is arranged in the annular grooves 19. Specifically, as Figure 1 and Figure 4 shown, the insertion and cooperation of the annular protrusion 18 and the annular groove 19 can perform preliminary positioning and installation on the upper tank body 1 and the tank cover 3, and the upper tank body 1 and the lower tank body 2, facilitating subsequent threaded connection and improving the connection stability between the tank cover 3, the upper tank body 1 and the lower tank body 2.

[0043] In one embodiment, hoppers 21 are arranged at several feeding ports 4. An end cover 22 is detachably installed at one end of the hopper 21 away from the feeding port 4, and anti-slip lines are formed on the outer wall of the end cover 22. Specifically, as Figure 1 and Figure 5 shown, the hopper 21 facilitates the staff to input the preparation material and improves the smoothness of inputting the preparation material. Further, since an end cover 22 is detachably installed at one end of the hopper 21 away from the feeding port 4, the detachable installation method of the end cover 22 and the hopper 21 can be threaded connection or flip clamping, so as to be able to close the hopper 21 when no material is fed, preventing external impurities from entering the upper tank body 1 and the lower tank body 2 through the hopper 21. It can be understood that through the anti-slip lines formed on the outer wall of the end cover 22, it is further convenient for the staff to open or close the end cover 22, and it is convenient to use.

[0044] In one embodiment, a side cover 23 is arranged on the outer wall of the lower tank body 2; a plurality of legs 24 are evenly and spacedly arranged along the circumferential direction of the outer wall of the lower tank body 2. Specifically, as Figure 1 and Figure 3As shown, the side cover 23 facilitates the maintenance of the lower tank body 2 and its internal components by the staff, and can also dredge the liquid outlet 7 by opening the side cover 23 when the liquid outlet 7 is blocked. Further, the lower tank body 2 and other components can be stably supported by a plurality of legs 24, and the structural design is simple and reasonable.

[0045] The foregoing are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An oil-based drilling fluid storage tank, comprising an upper tank body (1), a lower tank body (2) and a tank cover (3) which are detachably connected, characterized in that: The invention also comprises a stirring assembly and a cleaning assembly. The tank cover (3) is provided with a plurality of feeding ports (4) at intervals. The stirring assembly is arranged on the tank cover (3) and is used to stir and mix the drilling fluid in the upper tank body (1) and the lower tank body (2). The stirring assembly is provided with a scraper (5) which abuts against the inner walls of the upper tank body (1) and the lower tank body (2). A water inlet (6) is provided on the side wall of the tank cover (3). The cleaning assembly is used to clean the inner cavity of the upper tank body (1) and the lower tank body (2). The cleaning assembly is connected to an external liquid supply mechanism through the water inlet (6). The cleaning assembly is detachably mounted on the stirring assembly and can rotate relative to the tank cover (3). A liquid outlet (7) is provided at the bottom of the lower tank body (2).

2. The oil-based drilling fluid storage tank according to claim 1, characterized in that: A water storage tank (8) is formed on the side of the tank cover (3) facing the upper tank body (1); the cleaning assembly comprises a water delivery pipe (9), a water distribution plate (10) and a nozzle (11); the two ends of the water delivery pipe (9) are respectively connected to the water inlet (6) and the water storage tank (8); the water distribution plate (10) is detachably mounted on the stirring assembly and is used to close the notch of the water storage tank (8); and a plurality of branch pipes (12) for mounting the nozzle (11) are arranged at intervals along the circumference of the outer wall of the water distribution plate (10).

3. The oil-based drilling fluid storage tank according to claim 2, characterized in that: At least two of the nozzles (11) are arranged at intervals on the plurality of branch pipes (12) along their respective extending directions.

4. The oil-based drilling fluid storage tank according to claim 3, characterized in that: The stirring assembly comprises a motor (13), a rotating shaft (14) and a plurality of stirring blades (15); the motor (13) is vertically arranged on the tank cover (3); one end of the rotating shaft (14) is detachably connected to the power output end of the motor (13); the other end of the rotating shaft (14) passes through the water storage tank (8) and the water separation plate (10) and extends into the upper tank body (1) and the lower tank body (2); the water separation plate (10) is detachably connected to the rotating shaft (14); and a plurality of stirring blades (15) are evenly and spacedly arranged on the rotating shaft (14).

5. The oil-based drilling fluid storage tank according to claim 4, characterized in that: Two connecting rods (16) are arranged at intervals on the rotating shaft (14), and the two ends of the two connecting rods (16) are detachably connected to the two ends of the two scrapers (5) in a one-to-one correspondence. A reinforcing rod (17) is also arranged on the rotating shaft (14), and the reinforcing rod (17) is located between the two connecting rods (16). The two ends of the reinforcing rod (17) are detachably connected to the two scrapers (5).

6. An oil-based drilling fluid storage tank according to any one of claims 1 to 5, characterized in that: The top and bottom of the upper tank body (1) are respectively formed with annular protrusions (18); the tank cover (3) and the lower tank body (2) are provided with annular grooves (19) for the annular protrusions (18) to extend into; and a sealing ring (20) is arranged in the annular groove (19).

7. An oil-based drilling fluid storage tank according to any one of claims 1 to 5, characterized in that: A hopper (21) is provided at each of the plurality of feeding ports (4), and an end cover (22) is detachably mounted on one end of the hopper (21) away from the feeding port (4), and an anti-slip pattern is formed on the outer wall of the end cover (22).

8. An oil-based drilling fluid storage tank according to any one of claims 1 to 5, characterized in that: A side cover (23) is arranged on the outer wall of the lower tank body (2); and a plurality of legs (24) are evenly and spacedly arranged on the outer wall of the lower tank body (2) along its circumference.

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