Oil-based mud storage equipment

Abstract

The utility model provides oil-based mud storage equipment in the technical field of mud storage tanks, which comprises a support, a tank body arranged on the support, a tank cover mounted at the top of the tank body, the tank body consisting of a cylindrical tank body and a conical tank body, and a stirring component arranged in the tank body and comprising a central shaft, a stirring blade, a vertical plate, an inclined plate and a scraping plate, a plurality of stirring blades are arranged on the central shaft, are annularly arranged around the central shaft and are distributed at equal intervals in the axial direction of the central shaft; the scraping plate is in contact with the inner side walls of the cylindrical tank body and the conical tank body; the top of the center shaft penetrates through the tank cover and is fixedly connected with a stirring motor, the stirring motor is fixedly connected with the tank cover, the tank cover is provided with a feeding port, a breather valve and a laser radar, slurry and liquid are temporarily mixed through stirring blades, and oil-based slurry attached to the inner wall of the tank body is scraped off through a scraping plate; external impurities are prevented from entering through the breather valve, loss caused by liquid volatilization is reduced, and meanwhile discharging is facilitated; and the laser radar is arranged to help judge the storage capacity and the stirring time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mud storage tank, specifically is a kind of oil-based mud storage equipment. BACKGROUND

[0002] In the process of drilling oil and natural gas, drilling fluid and drilling cuttings, groundwater and other inevitable mixed together, form organic pollutants oil-based mud, including diesel (or white oil), water, organic clay and oily chemical additives etc., these oil-based mud is strictly prohibited direct discharge, must be harmless treatment.Oil-based mud is mainly divided into oil-containing drilling cuttings and waste oil-based mud, and its harmless treatment has two main purposes: first, because the cost of oil-based mud drilling fluid configuration is higher, the oil recovered from oil-based mud pollutants can be used for oil-based mud drilling fluid reproduction, to reduce the cost of oil and gas exploitation, second, reduce the harmful substances contained in oil-based mud, so that it meets the national discharge standard requirements.

[0003] Mud tank is essential equipment in the process of drilling operation and oil sludge harmless treatment process.In the use process of mud tank, mud is easy to produce deposition, and problems such as tank capacity reduction, influence new slurry quality, so regular cleaning and maintenance are necessary.

[0004] Chinese patent publication number: CN209324288U discloses a kind of drilling waste mud processing mud collecting tank, including mud collecting tank body, mud inlet pipe, control valve, stirring cavity, sedimentation cavity, drive motor, motor shaft, stirring shaft, stirring blade, partition, handle, spray head, vertical addition pipe, flocculating agent addition pipe, upper filter screen, lower filter screen, mud discharge pipe, support base and observation window, mud collecting tank body is set in the upper end of support base, the lower end of mud collecting tank body is fixedly connected with support base, partition is set in the inner intermediate position of mud collecting tank body, this technical solution is provided with a vertical partition in the interior of mud collecting tank body, the partition is divided into sedimentation cavity and stirring cavity, can realize the stirring and filtration settlement of waste mud integrally, with the advantages of high stirring efficiency, low pollution rate and strong stability, but the mud collecting tank needs to be filled with new slurry when being used in practice, so that the mud water in the upper layer of stirring tank flows into sedimentation cavity, and the oil-based at the bottom of stirring cavity cannot be discharged in time, and the sludge residue filtered out after mud enters stirring cavity also cannot be discharged in time, which will all lead to tank capacity reduction, so artificial cleaning is often needed, the operation environment is poor, and the work efficiency is low. SUMMARY

[0005] The utility model wants to solve the technical problem of how to clean the deposit in oil base mud and how to conveniently discharge, the utility model aims at providing a kind of oil base mud storage equipment, which can scrape off the adherent in the inner wall of tank and the deposit in the bottom of tank while mixing oil base mud, make oil base mud mix temporarily, so as to conveniently discharge.

[0006] The utility model adopts technical scheme: a kind of oil base mud storage equipment, including support, be equipped with tank on support, tank top is equipped with tank cover, the tank is composed of cylindrical tank and conical tank, cylindrical tank is arranged at the top of conical tank, stirring subassembly is also equipped in tank, the stirring subassembly includes center axis, stirring blade, vertical board, inclined plate and scraper, the axis of center axis and the axis of tank coincide with each other, a plurality of stirring blades are equipped on the center axis, a plurality of stirring blades are annularly arranged around the center axis and equidistantly spaced along the axial direction of center axis;Vertical board and inclined plate are symmetrically arranged on the left and right sides of center axis and are fixedly connected with center axis, a plurality of scrapers are fixed to the side, away from center axis, of vertical board and inclined plate, the side, away from vertical board, of scraper on vertical board is in contact with the inner side wall of cylindrical tank, the side, away from inclined plate, of scraper on inclined plate is in contact with the inner side wall of conical tank;The top of center axis passes through tank cover and is fixedly connected with stirring motor, stirring motor is fixedly connected with tank cover, tank cover is equipped with feed inlet, breather valve and laser radar, the liquid level in tank is vertically aligned by laser radar.

[0007] The oil base mud storage equipment provided by the utility model can obtain the following beneficial effects:

[0008] (1) a plurality of stirring blades, which are annularly arranged around the center axis and equidistantly spaced along the axial direction of the center axis, can mix the deposited mud with water, oil and other liquids with light quality together when the center axis rotates, facilitating the discharge of oil base mud, and preventing the deposition of mud from causing blockage or affecting the quality of new mud.

[0009] (2) by arranging a plurality of scrapers on the outside of the stirring assembly, the oil base mud adhering to the inner wall of the tank can be scraped off by the scrapers when the stirring assembly rotates and stirs, so that the working environment is improved and the work efficiency is improved.

[0010] (3) by arranging a breather valve on the tank cover, external impurities can be prevented from entering the tank, the loss of liquid evaporation in the oil base mud can be reduced, and air can enter when discharging to facilitate discharge.

[0011] (4) by arranging a laser radar on the irrigation, the tank can be continuously scanned by pulse laser, and three-dimensional characteristics in the tank can be generated in real time, so that the height of the liquid level and the height of the deposit are distinguished, the capacity of the oil base mud and the capacity of the deposited sand are visualized, the storage capacity and the stirring opportunity are judged, the cost is low, and the tank is not affected by the mist.

[0012] As preferred, the top of the vertical plate is provided with a connecting ring, the center of the connecting ring coincides with the axis of the central shaft, the connecting ring is fixedly connected with the central shaft through a plurality of connecting rods, and the top of the vertical plate is fixedly connected with the connecting ring; the bottom of the vertical plate is fixedly connected with a support rod, and the other end of the support rod is fixedly connected with the central shaft.

[0013] The vertical plate is fixed through the connecting ring and the support rod, so that the vertical plate does not incline or deviate when the stirring assembly rotates, the scraper on the vertical plate can always contact the inner side wall of the cylindrical tank body, the scraper can clean the inner side wall of the cylindrical tank body when the stirring assembly rotates, the oil-based sludge is prevented from adhering to the inner side wall of the cylindrical tank body to reduce the tank capacity, and the frequency of manual cleaning is reduced.

[0014] As preferred, the top end of the inclined plate is fixedly connected with the lower end of the support rod, and the bottom end of the inclined plate is fixedly connected with the central shaft.

[0015] The top end of the inclined plate is fixed through the support rod, and the bottom end of the inclined plate is fixedly connected with the central shaft, so that the scraper on the inclined plate can always contact the inner side wall of the conical tank body, the scraper can clean the inner side wall of the conical tank body when the stirring assembly rotates, the oil-based sludge is prevented from adhering to the inner side wall of the conical tank body, and the sludge deposited on the conical tank body is stirred and mixed with the liquid in the tank body.

[0016] As preferred, the installation heights of the scrapers are different.

[0017] The installation heights of the scrapers are different, so that the scrapers can clean the inner side walls at different heights in the tank body at the same time when the scrapers are driven to rotate by the stirring assembly, the number of the scrapers is reduced, and the wear speed of the scrapers is reduced.

[0018] As preferred, the bottom of the conical tank body is provided with a dosing port and a discharge port.

[0019] The dosing port is convenient for adding flocculants in time after the oil-based slurry is stored, and the discharge port is convenient for discharging the stored oil-based slurry.

[0020] As preferred, the height of the discharge port is lower than the height of the bottom end of the lowermost scraper on the inclined plate.

[0021] The height of the discharge port is lower than the height of the bottom end of the lowermost scraper on the inclined plate, so that the scraper does not block the discharge port.

[0022] As preferred, the bottom of the conical tank body is further provided with a discharge port, a main discharge pipe is connected to the discharge port, an inclined discharge pipe is arranged on one side of the bottom of the main discharge pipe, and the end of the inclined discharge pipe away from the main discharge pipe is inclined downward.

[0023] The oil-based mud is conveniently guided and discharged through the main discharge pipe and the inclined discharge pipe.

[0024] As a preference, a spiral conveying rod is arranged in the main discharge pipe, and a discharge motor is fixedly connected to the bottom end of the spiral conveying rod.

[0025] The oil-based mud in the tank is conveniently actively extracted through the spiral conveying rod and the discharge motor.

[0026] As a preference, an electromagnetic valve is arranged on the inclined discharge pipe.

[0027] The oil-based mud in the tank can be prevented from leaking during the storage of the oil-based mud when the electromagnetic valve is closed, and the discharge can be facilitated after the electromagnetic valve is opened, so that the communication and the closure of the inclined discharge pipe are controlled as required. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0029] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0030] Figure 2 is a sectional view of the present application;

[0031] Figure 3 is a schematic diagram of the three-dimensional structure of the stirring assembly in the present application;

[0032] Figure 4 is a top view of the stirring assembly in the present application;

[0033] Figure 5 is a sectional view of the present application Figure 4 at A-A;

[0034] Figure 6 is a sectional view of the present application Figure 4 at B-B.

[0035] Label: 1- support, 2- pot body, 21- cylindrical pot body, 22- conical pot body, 23- stirring assembly, 231- central shaft, 232- stirring blade, 233- vertical plate, 234- inclined plate, 235- connecting ring, 236- connecting rod, 237- support rod, 238- scraper, 24- dosing port, 25- discharge port, 26- main discharge pipe, 261- spiral conveying rod, 262- discharge motor, 263- inclined discharge pipe, 264- electromagnetic valve, 3- pot cover, 31- stirring motor, 32- feed inlet, 33- breather valve, 34- laser radar. DETAILED DESCRIPTION

[0036] The specific embodiments will be described below with reference to the accompanying drawings. Figures 1-6 The technical scheme of the utility model is described clearly and completely, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0037] In the description of the utility model, it is necessary to explain that, unless there is explicit provision and limitation, the terms "installation", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] Example 1

[0039] The following will be further described with reference to specific embodiments, referring to Figures 1-6As shown, the embodiment is an oil-based mud storage device, which comprises a support 1, a tank body 2 is arranged on the support 1, a tank cover 3 is arranged on the top of the tank body 2, the tank body 2 is composed of a cylindrical tank body 21 and a conical tank body 22, the cylindrical tank body 21 is arranged on the top of the conical tank body 22, and a stirring assembly 23 is further arranged in the tank body 2, the stirring assembly 23 comprises a central shaft 231, stirring blades 232, vertical plates 233, inclined plates 234 and scrapers 238, the axis of the central shaft 231 coincides with the axis of the tank body 2, a plurality of stirring blades 232 are arranged on the central shaft 231, and the stirring blades 232 are arranged in a ring around the central shaft 231 and are distributed equidistantly along the axial direction of the central shaft 231; the vertical plates 233 and the inclined plates 234 are symmetrically arranged on the left and right sides of the central shaft 231 and are fixedly connected with the central shaft 231, a plurality of scrapers 238 are fixedly arranged on the side of the vertical plates 233 and the inclined plates 234 away from the central shaft 231, the scrapers 238 on the vertical plates 233 are in contact with the inner side wall of the cylindrical tank body 21, and the scrapers 238 on the inclined plates 234 are in contact with the inner side wall of the conical tank body 22; the top of the central shaft 231 penetrates through the tank cover 3 and is fixedly connected with a stirring motor 31, the stirring motor 31 is fixedly connected with the tank cover 3, a feeding port 32, a breather valve 33 and a laser radar 34 are arranged on the tank cover 3, the laser radar 34 is vertically aligned with the liquid surface in the tank body 2, the stirring blades 232 facilitate the full mixing of the deposited mud and the liquid, the oil-based mud is facilitated to be discharged, and the blockage caused by the deposition of the mud or the influence on the quality of the new mud is prevented; the plurality of scrapers 238 arranged on the outside of the stirring assembly 23 facilitate the scraping of the oil-based mud attached to the inner wall of the tank body 2 during stirring, and the working efficiency is improved; the breather valve 33 arranged on the tank cover 3 can prevent foreign matters from entering the tank body 2, reduce the loss of liquid volatilization in the oil-based mud, and facilitate the discharge; the laser radar 34 arranged on the tank cover 3 can continuously scan the tank body 2 by using pulsed laser, generate three-dimensional characteristics in the tank body 2 in real time, visualize the capacity of the oil-based mud and the capacity of the deposited silt, and help to determine the storage capacity and the stirring time.

[0040] Reference Figure 3 Or Figure 4As shown, in this embodiment, the top of the vertical plate 233 is provided with a connecting ring 235, the center of the connecting ring 235 coincides with the axis of the central shaft 231, the connecting ring 235 is fixedly connected with the central shaft 231 through a plurality of connecting rods 236, and the top of the vertical plate 233 is fixedly connected with the connecting ring 235; the bottom of the vertical plate 233 is fixedly connected with a support rod 237, the other end of the support rod 237 is fixedly connected with the central shaft 231, the vertical plate 233 is fixed through the connecting ring 235 and the support rod 237, so as to prevent the vertical plate 233 from tilting or deviating when the stirring assembly 23 rotates, so that the scraper 238 on the vertical plate 233 can always be in contact with the inner side wall of the cylindrical tank body 21, ensuring that the scraper 238 can clean the inner side wall of the cylindrical tank body 21 when the stirring assembly 23 rotates, preventing oil-based sludge from adhering to the inner side wall of the cylindrical tank body 21 to reduce the tank capacity, and reducing the frequency of manual cleaning.

[0041] Referring to Figure 3 or Figure 5 As shown, in this embodiment, the top end of the inclined plate 234 is fixedly connected with the lower end of the support rod 237, and the bottom end of the inclined plate 234 is fixedly connected with the central shaft 231. The top end of the inclined plate 234 is fixed through the support rod 237, and the bottom end of the inclined plate 234 is fixedly connected with the central shaft 231, so that the scraper 238 on the inclined plate 234 can always be in contact with the inner side wall of the conical tank body 22, ensuring that the scraper 238 can clean the inner side wall of the conical tank body 22 when the stirring assembly 23 rotates, preventing oil-based sludge from adhering to the inner side wall of the conical tank body 22, and facilitating the mixing of the sludge deposited on the conical tank body 22 with the liquid in the tank body 2 after being stirred.

[0042] Referring to Figure 3 or Figure 5 As shown, in this embodiment, the installation heights of the scrapers 238 are different. By making the installation heights of the scrapers 238 different, the scrapers 238 can clean the inner side wall of the tank body 2 at different heights at the same time when they are driven to rotate by the stirring assembly 23, the number of scrapers 238 is reduced, and the wear rate of the scrapers 238 is reduced.

[0043] Referring to Figures 1-2 As shown, in this embodiment, the conical tank body 22 is provided with a dosing port 24 and a discharge port 25. The dosing port 24 facilitates the timely addition of flocculants after the storage of oil-based sludge, and the discharge port 25 facilitates the discharge of the stored oil-based sludge.

[0044] Referring to Figure 2 As shown, in this embodiment, the height of the discharge port 25 is lower than the height of the bottom end of the lowest scraper 238 on the inclined plate 234. By making the height of the discharge port 25 lower than the height of the bottom end of the lowest scraper 238 on the inclined plate 234, the scraper 238 is prevented from blocking the discharge port 25 and affecting the discharge.

[0045] Referring to Figure 2 As shown in the embodiment, the bottom of the conical tank body 22 is further provided with a discharge port 25, and a main discharge pipe 26 is connected to the discharge port 25. One side of the bottom of the main discharge pipe 26 is provided with an inclined discharge pipe 263, and the end of the inclined discharge pipe 263 away from the main discharge pipe 26 is inclined downward. The main discharge pipe 26 and the inclined discharge pipe 263 facilitate guiding the discharged oil-based mud.

[0046] Referring to Figure 2 As shown in the embodiment, the main discharge pipe 26 is provided with a spiral conveying rod 261, and the bottom end of the spiral conveying rod 261 is fixedly connected with a discharge motor 262. The discharge motor 262 is arranged outside the main discharge pipe 26 and is fixedly connected with the main discharge pipe 26. The spiral conveying rod 261 and the discharge motor 262 facilitate actively pumping out the oil-based mud in the tank body 2.

[0047] Referring to Figure 2 As shown in the embodiment, the inclined discharge pipe 263 is provided with a solenoid valve 264. When the solenoid valve 264 is closed, the oil-based mud in the tank body 2 can be prevented from leaking during storage. When the solenoid valve 264 is opened, the discharge can be facilitated, so that the communication and closure of the inclined discharge pipe 263 can be controlled as required.

[0048] Embodiment 2

[0049] When the utility model is used, the oil-based mud is injected into the tank body 2 through the feed inlet 32. The height of the liquid surface is distinguished in real time through the laser radar 34. When the storage capacity in the tank body 2 reaches the limit, the injection of the oil-based mud is stopped. After the oil-based mud is injected, the flocculating agent can be injected into the tank body 2 through the dosing port 24, and the stirring motor 31 is started at the same time. The stirring motor 31 rotates to drive the central shaft 231 to rotate, and the central shaft 231 drives the plurality of stirring blades 232, the vertical plate 233 and the inclined plate 234 to rotate. The solid particles or colloid particles in the oil-based mud are fully mixed with the flocculating agent, and then the flocculating agent is bridged into a large particle group of flocculating colloid particles and is stored, which is convenient for subsequent separation and filtration.

[0050] When storing, the breather valve 33 can close the tank body 2 to prevent the solvent in the oil-based mud from volatilizing.

[0051] When the discharge is needed, first start the stirring motor 31, the stirring motor 31 drives the stirring blade 232 to rotate, at the same time, the scraper 238 on the vertical plate 233 and the inclined plate 234 rotates with the central shaft 231, the oil-based deposit adhered to the inner wall of the cylindrical tank body 21 and the inner wall of the conical tank body 22 is scraped off and mixed with the flocculent sludge, sand and the like deposited at the bottom of the tank body 2 and the liquid in the tank body 2 for a short time, so that the discharge is facilitated; after the mixing is completed, the electromagnetic valve 264 and the discharge motor 262 are opened, the discharge motor 262 rotates to drive the spiral conveying rod 261 to rotate in the main discharge pipe 26, so that the oil-based slurry after stirring and mixing is discharged from the inclined discharge pipe 263, the breather valve 33 can be communicated with the outside of the tank body 2 when the content in the tank body 2 is reduced, so that the negative pressure in the tank body 2 is reduced, thereby facilitating the discharge and preventing the oil-based slurry from being unable to be discharged due to the negative pressure in the tank.

[0052] Through the stirring of the stirring blade 232, the deposited slurry can be mixed with the liquid in the tank body 2 for a short time, the flowability of the deposited sand is improved, so that the deposit in the tank body 2 is discharged, the adhering matter on the inner wall of the cylindrical tank body 21 and the conical tank body 22 can be scraped off by the scraper 238, the inner wall of the tank body 2 is cleaned during the stirring process, and the oil-based slurry is mixed with the adhering matter and then discharged from the discharge port 25, so that the deposit or the adhering matter does not cause the tank capacity to be reduced, the frequency of manual cleaning is reduced, the quality of the new slurry is not affected, the operation of storing or discharging the oil-based slurry is convenient, and the working efficiency is improved.

[0053] The directions mentioned in the utility model, such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model by indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0054] The standard parts used in the application file can be purchased from the market, and can be ordered according to the description and drawings. The specific connection mode of each part adopts the conventional means of bolts, rivets and welding in the prior art. The mechanical parts and equipment adopt conventional models in the prior art. The control mode is automatically controlled by the controller. The control circuit of the controller can be realized by simple programming of the person skilled in the art. It belongs to the common knowledge in the art. And the application is mainly used to protect the mechanical device, so the control mode and circuit connection are not explained in detail.

[0055] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An oil-based mud storage device, comprising a support (1), a tank body (2) is arranged on the support (1), a tank cover (3) is arranged on the top of the tank body (2), characterized in that: The tank body (2) is composed of a cylindrical tank body (21) and a conical tank body (22), the cylindrical tank body (21) is arranged at the top of the conical tank body (22), and the tank body (2) is also provided with a stirring assembly (23), the stirring assembly (23) comprises a central shaft (231), stirring blades (232), vertical plates (233), inclined plates (234) and scrapers (238), the axis of the central shaft (231) coincides with the axis of the tank body (2), a plurality of stirring blades (232) are arranged on the central shaft (231), the stirring blades (232) are arranged in a ring around the central shaft (231) and are distributed at equal intervals along the axial direction of the central shaft (231); the vertical plates (233) and the inclined plates (234) are symmetrically arranged on the left and right sides of the central shaft (231) and are fixedly connected with the central shaft (231), a plurality of scrapers (238) are fixedly arranged on the side, away from the central shaft (231), of each of the vertical plates (233) and the inclined plates (234), the scrapers (238) on the vertical plates (233) are in contact with the inner side wall of the cylindrical tank body (21) on the side, away from the vertical plates (233), and the scrapers (238) on the inclined plates (234) are in contact with the inner side wall of the conical tank body (22) on the side, away from the inclined plates (234); the top of the central shaft (231) penetrates through the tank cover (3) and is fixedly connected with a stirring motor (31), the stirring motor (31) is fixedly connected with the tank cover (3), the tank cover (3) is provided with a feeding port (32), a breather valve (33) and a laser radar (34), and the laser radar (34) is vertically aligned with the liquid surface in the tank body (2).

2. The oil-based mud storage apparatus of claim 1, wherein: The top of each vertical plate (233) is provided with a connecting ring (235), the center of the connecting ring (235) coincides with the axis of the central shaft (231), the connecting ring (235) is fixedly connected with the central shaft (231) through a plurality of connecting rods (236), and the top of each vertical plate (233) is fixedly connected with the connecting ring (235).

3. The oil-based mud storage apparatus of claim 2, wherein: The top end of each inclined plate (234) is fixedly connected with the lower end of a support rod (237), and the bottom end of each inclined plate (234) is fixedly connected with the central shaft (231).

4. The oil-based mud storage apparatus of claim 3, wherein: The installation heights of the scrapers (238) are different.

5. The oil-based mud storage apparatus of claim 1, wherein: The bottom of the conical tank body (22) is provided with a dosing port (24) and a discharge port (25).

6. The oil-based mud storage apparatus of claim 5, wherein: The heights of the dosing port (24) and the discharge port (25) are lower than the height of the lowermost scraper (238) on the inclined plate (234).

7. The oil-based mud storage apparatus of claim 6, wherein: The bottom of the conical tank body (22) is also provided with a discharge port (25), a main discharge pipe (26) is connected to the discharge port (25), an inclined discharge pipe (263) is arranged on one side of the bottom of the main discharge pipe (26), and the end, away from the main discharge pipe (26), of the inclined discharge pipe (263) is inclined downward.

8. The oil-based mud storage apparatus of claim 7, wherein: The main discharge pipe (26) is provided with a spiral conveying rod (261), and the bottom end of the spiral conveying rod (261) is fixedly connected with a discharge motor (262).

9. The oil-based mud storage apparatus of claim 7, wherein: The inclined discharge pipe (263) is provided with a solenoid valve (264).

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