A high-temperature-resistant cement mixing device for cementing

Abstract

The application discloses a high-temperature-resistant cement mixing device for well cementation, which comprises a stirring tank body, a feeding hopper is communicated with the top of the stirring tank body, a stirring assembly is arranged in the stirring tank body, a scraping motor is arranged outside the bottom of the stirring tank body, an output shaft of the scraping motor is connected with a rotating rod, the other end of the rotating rod penetrates through the bottom of the stirring tank body and is symmetrically provided with bottom scrapers on the outer surface, and the ends, away from the rotating rod, of the two bottom scrapers are vertically provided with side wall scrapers. The mud in the stirring tank body is fully stirred by the stirring assembly, and the scraping motor is started at the same time. The bottom scrapers and the side wall scrapers are driven to rotate by the scraping motor. The side wall scrapers make circular motion along the inner wall of the stirring tank body. The rotating side wall scrapers can not only stir the mud close to the inner wall of the stirring tank body and improve the mixing efficiency of the mud, but also scrape the mud adhered to the inner wall of the stirring tank body, so that the mud is prevented from adhering to the inner wall of the stirring tank body for a long time and the stirring tank body is convenient to clean in the later period.

Description

Technical Field

[0001] This utility model relates to the field of cement mixing equipment technology, and in particular to a high-temperature resistant cement mixing device for well cementing. Background Technology

[0002] Cementing cement, also known as plugging cement, is a type of cement specifically used for cementing projects in oil and gas wells. It has suitable density and setting time, low consistency, good resistance to settling and pumpability. When injected into a predetermined well section, it can quickly set and harden, generating a certain mechanical strength. After curing, it has good impermeability, stability and corrosion resistance. It is made by grinding clinker with hydraulic calcium silicate as the main component, adding appropriate amounts of gypsum and grinding aids.

[0003] Chinese patent CN212867495U discloses a cement slurry for oil drilling and cementing with good mixing effect. By driving an electric motor, the first stirring rod on the rotating shaft can rotate, thus stirring the slurry in the middle of the mixing tank. The first and second stirring rods are staggered, allowing the cement to be mixed more evenly and resulting in a better mixing effect. However, due to the strong adhesiveness of the cement slurry, it easily adheres to the inner wall of the mixing tank during the mixing process, making it inconvenient to clean later, and it cannot be completely discharged from the mixing tank after mixing. Utility Model Content

[0004] The purpose of this application is to provide a high-temperature resistant cement mixing device for cementing, so as to solve the problems in the prior art where cement mud has strong adhesion, and during mixing, it easily adheres to the inner wall of the mixing tank, making it inconvenient to clean later, and cannot be completely discharged from the mixing tank after mixing.

[0005] To address the aforementioned technical problems, this application provides a high-temperature resistant cement mixing device for well cementing, comprising a mixing tank, a feed hopper connected to the top of the mixing tank, a mixing assembly inside the mixing tank, a scraper motor on the outer side of the bottom of the mixing tank, a rotating rod connected to the output shaft of the scraper motor, the other end of the rotating rod passing through the bottom of the mixing tank and having bottom scrapers symmetrically arranged on its outer surface, side wall scrapers perpendicularly arranged at the ends of the two bottom scrapers away from the rotating rod, a discharge pipe connected to the bottom of the mixing tank, a discharge outlet opened at the bottom end of the discharge pipe, a conveying motor fixedly installed on one side of the discharge pipe, and a conveying auger connected to the output end of the conveying motor.

[0006] It should be noted in the solution that scraping strips are fixedly connected to the back of both side wall scrapers, and the scraping strips are in contact with the inner wall of the mixing tank.

[0007] It is worth noting that the inner wall of the mixing tank is provided with an annular groove, and the upper back of the two side wall scrapers is fixedly connected with a sliding rod, and the two sliding rods are slidably connected to the annular groove.

[0008] In a preferred embodiment, the stirring assembly includes a stirring motor fixed to one side of the top of the stirring tank. The output end of the stirring motor is connected to a driving wheel, and a driven wheel is meshed with the outer surface of the driving wheel. A connecting rod is fixedly installed inside the driven wheel, and a rotating cylinder is fixedly connected to the outer surface of the connecting rod. Stirring plates are evenly distributed on the outer surface of the rotating cylinder.

[0009] It is worth noting that through holes are evenly distributed on several of the aforementioned stirring plates.

[0010] In a preferred embodiment, a fixing ring is provided on the lower part of the outer surface of the mixing tank, and a support column is fixedly provided at the lower end of the fixing ring.

[0011] Compared with the prior art, the high-temperature resistant cement mixing device for cementing provided by this utility model has at least the following beneficial effects:

[0012] 1. An agitator is installed inside the mixing tank to thoroughly mix the slurry. At the same time, the scraper motor is started, which drives the bottom scraper and the side wall scraper to rotate. The side wall scraper moves in a circular motion along the inner wall of the mixing tank. The rotating side wall scraper can not only agitate the slurry near the inner wall of the mixing tank to improve the mixing efficiency, but also scrape off the slurry adhering to the inner wall of the mixing tank, preventing the slurry from adhering to the inner wall of the mixing tank for a long time, and making it easier to clean the mixing tank later.

[0013] 2. A discharge pipe is connected to the bottom of the discharge pipe. After mixing is completed, the conveying motor drives the conveying auger to rotate, accelerating the discharge of slurry from the discharge pipe, resulting in a faster discharge speed. At the same time, the scraper motor drives the bottom scraper and side wall scraper to rotate, scraping off the slurry adhering to the bottom and side walls of the mixing tank, so that all the slurry in the mixing tank is discharged, avoiding waste caused by slurry accumulation at the bottom of the mixing tank and saving resources. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 A three-dimensional structural diagram of a high-temperature resistant cement mixing device for cementing provided by this utility model;

[0016] Figure 2 A plan view of a high-temperature resistant cement mixing device for cementing provided by this utility model;

[0017] Figure 3 A schematic diagram of a stirring assembly structure provided by this utility model;

[0018] Figure 4 A three-dimensional structural diagram of a bottom scraper and a side wall scraper provided by this utility model;

[0019] In the diagram: 1. Mixing tank; 2. Feed hopper; 301. Mixing motor; 302. Drive wheel; 303. Driven wheel; 304. Connecting rod; 305. Rotating cylinder; 306. Mixing plate; 307. Through hole; 401. Scraper motor; 402. Rotating rod; 403. Bottom scraper; 404. Side wall scraper; 405. Scraper bar; 5. Sliding rod; 6. Annular groove; 7. Discharge pipe; 801. Discharge pipe; 802. Conveying auger; 803. Conveying motor; 9. Discharge port; 10. Fixing ring; 11. Support column. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0021] The core of this application is to provide a high-temperature resistant cement mixing device for cementing, which solves the problems in the prior art where cement mud has strong adhesion, easily adheres to the inner wall of the mixing tank during mixing, making it inconvenient to clean later, and cannot be completely discharged from the mixing tank after mixing.

[0022] Figure 1 This utility model provides a three-dimensional structural diagram of a high-temperature resistant cement mixing device for cementing. Figure 2 A plan view of a high-temperature resistant cement mixing device for cementing provided by this utility model. Figure 3 This is a schematic diagram of a stirring assembly structure provided by the present invention. Figure 4 A three-dimensional structural diagram of the bottom scraper and side wall scraper provided by this utility model is shown below. Figures 1 to 4 As stated above.

[0023] A high-temperature resistant cement mixing device for well cementing includes a mixing tank 1. A feed hopper 2 is connected to the top of the mixing tank 1. The size of the mixing tank 1 can be set according to actual needs. An agitator is installed inside the mixing tank 1 to fully mix the mud inside. A scraper motor 401 is installed on the outer side of the bottom of the mixing tank 1 and is fixed to the bottom. The output shaft of the scraper motor 401 is connected to a rotating rod 402. The other end of the rotating rod 402 passes through the bottom of the mixing tank 1, and bottom scrapers 403 are symmetrically arranged on its outer surface. The bottom scrapers 403 are vertically fixed to the rotating rod 402. When the scraper motor 401 drives the rotating rod 402 to rotate, the rotating rod 402 drives the bottom scrapers 403 to rotate, thus agitating and scraping the mud at the bottom of the mixing tank 1. A side wall scraper 404 is vertically installed at the end of the two bottom scrapers 403 away from the rotating rod 402. The side wall scraper 404 is located close to the inner wall of the mixing tank 1. The side wall scraper 404 moves in a circular motion with the bottom scraper 403, thereby agitating and scraping the mud on the inner wall of the mixing tank 1, preventing the mud from adhering to the inner wall of the mixing tank 1 for a long time and reducing the workload of cleaning the mixing tank 1 later.

[0024] To facilitate the rapid discharge of slurry from the mixing tank 1, a discharge pipe 7 is connected to the bottom of the mixing tank 1. A discharge pipe 801 is connected to the bottom end of the discharge pipe 7. A discharge port 9 is located at the end of the discharge pipe 801 furthest from the discharge pipe 7. A conveying motor 803 is fixedly installed on one side of the discharge pipe 801. A conveying auger 802 is connected to the output end of the conveying motor 803. The conveying auger 802 rotates within the discharge pipe 801 along its length. The conveying motor 803 is mounted on the discharge pipe 801 and connected to the shaft of the conveying auger 802. When discharge is required, the mixed slurry falls into the discharge pipe 801 through the discharge pipe 7. The conveying motor 803 drives the conveying auger 802 to rotate, thereby accelerating the discharge of the slurry from the discharge port 9. This results in a faster discharge speed and improved work efficiency. At the same time, the scraper motor 401 drives the bottom scraper 403 and the side wall scraper 404 to rotate, scraping off the mud adhering to the bottom and side wall of the mixing tank 1, so that all the mud in the mixing tank 1 is discharged, avoiding waste caused by mud accumulating at the bottom of the mixing tank 1 and saving resources.

[0025] Furthermore, in order to better scrape off the mud adhering to the inner wall of the mixing tank 1, scraping strips 405 are fixedly connected to the back of the two side wall scrapers 404. The scraping strips 405 are in contact with the inner wall of the mixing tank 1, and the mud adhering to the inner wall can be effectively scraped off by the scraping strips 405 in contact with the inner wall of the mixing tank 1.

[0026] To ensure the stability of the side wall scrapers 404 during operation, preferably, an annular groove 6 is provided on the inner wall of the mixing tank 1, and sliding rods 5 are fixedly connected to the upper back of the two side wall scrapers 404. The two sliding rods 5 are slidably connected to the annular groove 6. By using the sliding connection between the sliding rods 5 and the annular groove 6, the two side wall scrapers 404 can move in a circular motion along the inner wall of the mixing tank 1, and then the mud adhering to the inner wall of the mixing tank 1 can be scraped off by the scraping strips 405 on both sides.

[0027] In the above embodiments, preferably, the stirring assembly includes a stirring motor 301 fixed to one side of the top of the stirring tank 1. The output end of the stirring motor 301 is connected to a driving wheel 302. A driven wheel 303 is meshed with the outer surface of the driving wheel 302. A connecting rod 304 is fixedly installed inside the driven wheel 303. A rotating cylinder 305 is fixedly connected to the outer surface of the connecting rod 304. Stirring plates 306 are evenly arranged on the outer surface of the rotating cylinder 305. The stirring of several stirring plates 306 can increase the fluidity of the mud, thereby making the mud evenly mixed. Preferably, through holes 307 are evenly opened on several stirring plates 306. The evenly arranged through holes 307 on the stirring plates 306 can reduce the resistance during stirring, thereby improving the mixing efficiency.

[0028] Preferably, a fixing ring 10 is provided on the lower part of the outer surface of the mixing tank 1, and a support column 11 is fixedly provided at the lower end of the fixing ring 10. The device is supported by the support column 11, which facilitates material discharge.

[0029] The high-temperature resistant cement mixing device for well cementing provided in this application operates as follows: The materials to be mixed are added to the mixing tank 1 through the feed hopper 2. The mixing motor 301 and the scraper motor 401 are started. The mixing motor 301 drives several mixing plates 306 to thoroughly mix the mud. When the scraper motor 401 drives the rotating rod 402 to rotate, the rotating rod 402 drives the bottom scraper 403 to rotate, and the side wall scraper 404 moves in a circular motion along the inner wall of the mixing tank 1, thereby scraping off the mud adhering to the inner wall of the mixing tank 1 through the scraper strips 405 on both sides. After mixing, the mud falls into the discharge pipe 801 through the discharge pipe 7. The conveying motor 803 drives the conveying auger 802 to rotate, which accelerates the discharge of mud from the discharge port 9, resulting in a faster discharge speed and improved work efficiency. At the same time, the scraper motor 401 drives the bottom scraper 403 and the side wall scraper 404 to rotate, scraping off the mud adhering to the bottom and side wall of the mixing tank 1, so that all the mud in the mixing tank 1 is discharged, avoiding waste caused by mud accumulating at the bottom of the mixing tank 1 and saving resources.

[0030] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and incorporate common knowledge or customary techniques in the art disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0031] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A high-temperature resistant cement mixing device for well cementing, characterized in that, include: A mixing tank (1) is provided with a feed hopper (2) connected to its top. A mixing assembly is provided inside the mixing tank (1). A scraper motor (401) is provided on the outer side of the bottom of the mixing tank (1). The output shaft of the scraper motor (401) is connected to a rotating rod (402). The other end of the rotating rod (402) passes through the bottom of the mixing tank (1) and bottom scrapers (403) are symmetrically arranged on its outer surface. Two bottom scrapers (403) are provided. A side wall scraper (404) is vertically installed at the end away from the rotating rod (402). A discharge pipe (7) is connected to the bottom of the mixing tank (1). A discharge pipe (801) is connected to the bottom end of the discharge pipe (7). A discharge port (9) is opened at the end of the discharge pipe (801) away from the discharge pipe (7). A conveying motor (803) is fixedly installed on one side of the discharge pipe (801). A conveying auger (802) is connected to the output end of the conveying motor (803).

2. The high-temperature resistant cement mixing device for well cementing according to claim 1, characterized in that, The back of each of the two side wall scrapers (404) is fixedly connected with a scraping strip (405), and the scraping strip (405) is in contact with the inner wall of the mixing tank (1).

3. The high-temperature resistant cement mixing device for cementing according to claim 2, characterized in that, The inner wall of the mixing tank (1) is provided with an annular groove (6), and the upper back of the two side wall scrapers (404) is fixedly connected with a sliding rod (5), and the two sliding rods (5) are slidably connected to the annular groove (6).

4. The high-temperature resistant cement mixing device for cementing according to claim 1, characterized in that, The stirring assembly includes a stirring motor (301) fixed on one side of the top of the stirring tank (1). The output end of the stirring motor (301) is connected to a drive wheel (302). A driven wheel (303) is meshed with the outer surface of the drive wheel (302). A connecting rod (304) is fixedly installed inside the driven wheel (303). A rotating cylinder (305) is fixedly connected to the outer surface of the connecting rod (304). Stirring plates (306) are evenly arranged on the outer surface of the rotating cylinder (305).

5. A high-temperature resistant cement mixing device for cementing according to claim 4, characterized in that, Through holes (307) are evenly provided on several of the stirring plates (306).

6. A high-temperature resistant cement mixing device for cementing according to any one of claims 1 to 5, characterized in that, A fixing ring (10) is provided on the lower part of the outer surface of the mixing tank (1), and a support column (11) is fixedly provided at the lower end of the fixing ring (10).

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