Water-based high-temperature-resistant leak sealing agent for drilling fluid, and preparation method and device thereof

Abstract

The application belongs to the technical field of drilling fluid plugging agents, in particular to a water-based drilling fluid high-temperature resistant plugging agent and a preparation method and device thereof, which are composed of the following raw materials in parts by weight: walnut shell powder 20-30 parts, calcium silicate 10-20 parts, mica sheet 5-10 parts, structure reinforcing agent 10-17 parts, dispersing agent 1-3 parts, and lubricant 1-2 parts; the structure reinforcing agent is composed of fiber material 5-10 parts and sodium silicate 5-7 parts; the dispersing agent is a phosphate ester dispersing agent; and the lubricant is a silane compound lubricant; sodium silicate has high thermal stability, can maintain good structure and function at high temperature, and enables the plugging agent to adapt to a stable high environment; the dispersing agent and the lubricant are used to improve the dispersibility and flowability of the plugging agent and help the plugging agent play a role under different operating conditions; therefore, the plugging agent is prepared by compounding organic raw materials and inorganic raw materials, so as to enhance the high-temperature resistance and plugging effect of the plugging agent.

Description

Technical Field

[0001] This invention belongs to the field of drilling fluid plugging agent technology, specifically a water-based drilling fluid anti-high temperature plugging agent and its preparation method and apparatus. Background Technology

[0002] In oil and gas drilling, drilling fluid (or mud) is one of the essential materials. The main functions of drilling fluid are to maintain wellbore stability, cool and lubricate the drill bit, transport cuttings, and prevent the intrusion of underground fluids.

[0003] Drilling is the process of using mechanical equipment or manpower to drill holes into the ground to create boreholes. It typically refers to the drilling of wells for exploring or developing liquid and gaseous minerals such as oil and natural gas, as well as large-diameter water supply wells. Drilling has extremely wide applications in national economic development. Well leakage is a major problem restricting efficient drilling. In cases of well leakage, plugging agents are used to prevent and mitigate the leakage during drilling.

[0004] However, most existing water-based drilling fluid plugging agents are based on organic materials or synthetic polymers. These materials may decompose or react at high temperatures, thereby losing their plugging effect. Furthermore, existing plugging agents have limited high-temperature resistance and cannot effectively seal the pores and cracks in high-temperature formations. Therefore, this invention provides a water-based drilling fluid high-temperature resistant plugging agent and its preparation method and apparatus. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the water-based drilling fluid anti-high temperature plugging agent of the present invention is composed of the following raw materials in parts by weight: 20-30 parts of walnut shell powder, 10-20 parts of calcium silicate, 5-10 parts of mica flakes, 10-17 parts of structural reinforcing agent, 1-3 parts of dispersant, and 1-2 parts of lubricant.

[0007] The structural reinforcing agent is composed of 5-10 parts of fiber material and 5-7 parts of sodium silicate, the dispersant is a phosphate ester dispersant, and the lubricant is a silane compound lubricant.

[0008] A method for preparing a water-based drilling fluid anti-high temperature plugging agent, the method comprising the following steps:

[0009] S1. Prepare 20-30 parts of walnut shell powder, 10-20 parts of calcium silicate, 5-10 parts of mica flakes, 10-17 parts of structural reinforcing agent, 1-3 parts of dispersant, and 1-2 parts of lubricant according to the required weight. Pour the walnut shell powder, calcium silicate, and mica flakes into the grinding and stirring device, and add the aqueous solution after grinding and mixing.

[0010] S2. The structural reinforcing agent composed of fiber material and sodium silicate is added into the grinding and stirring device, and then ground and stirred by the grinding and stirring device to make the raw material uniform.

[0011] S3. Slowly add the dispersant and lubricant into the grinding and mixing device, and add them at a low stirring rate inside the grinding and mixing device, and stir evenly. After all the raw materials are mixed evenly, a water-based drilling fluid anti-high temperature plugging agent is made.

[0012] The specific operating steps of the grinding and stirring device in step S1 are as follows:

[0013] S11. Solid raw materials are added into the reactor body through the upper feed pipe, and after being added, they are screened by the screening plate and enter the stirring area at the bottom of the reactor body.

[0014] S12. The motor drives the rotating rod to rotate, and after the rotating rod rotates, the grinding plate and the screening plate rotate in opposite directions simultaneously through the transmission of helical gear 1, helical gear 2 and helical gear 3 to grind the solid raw materials that cannot be screened, and make all the solid raw materials meet the requirements to pass through the screening holes.

[0015] S13. After the solid raw materials are ground and screened, water is introduced into the inlet pipe through an external water pump, and then sprayed through the nozzle to rinse the top of the screen plate. During rinsing, the rotation of the screen plate causes the nozzle to swing and rinse.

[0016] S14. Liquid raw materials and water enter the stirring area at the bottom of the reactor body through the feed pipe in the middle, and are uniformly mixed by rotating the stirring rod through the rotating rod.

[0017] A device for preparing a water-based drilling fluid anti-high temperature plugging agent, the device being applicable to the above preparation method, wherein the grinding and stirring device in step S1 includes a support frame, and a reaction vessel body is fixedly fixed inside the support frame;

[0018] The reactor body is rotatably connected to a rotating rod, a motor is installed on the top of the reactor body, the output end of the motor is fixedly connected to the rotating rod, and multiple stirring rods are fixedly connected to the outer surface of the rotating rod.

[0019] A grinding assembly is provided between the rotating rod and the inside of the reactor body, and a rinsing assembly is provided inside the reactor body.

[0020] Preferably, the grinding assembly includes a screening plate with multiple screening holes inside. A limiting groove is formed on the inner side wall of the reactor. A limiting ring is rotatably connected inside the limiting groove. The limiting ring is fixedly connected to the screening plate. The rotating rod is fixedly inserted through the screening plate.

[0021] Preferably, a transmission assembly is provided above one outer surface of the rotating rod, and connecting plates are provided on both the left and right sides of the transmission assembly. An inner groove is opened inside the connecting plate, and an electric push rod is fixedly installed on both the left and right sides inside the inner groove. A grinding plate is fixedly connected to the output end of the electric push rod.

[0022] Preferably, the transmission assembly includes multiple fixed rods, with a support cylinder fixedly connected between the multiple fixed rods. A support ring is fixedly connected to the lower part of the support cylinder, and a rotating cylinder is rotatably connected inside the support ring. The rotating cylinder is fixedly connected to a connecting plate, and a helical gear one is fixedly connected above the outer surface of the rotating cylinder. An installation hole is provided at the center of the inner sidewall of the support cylinder, and a rotating rod two is rotatably connected inside the installation hole. A helical gear three is fixedly connected to one end of the rotating rod two, and a helical gear two is fixedly connected to the outer surface of the rotating rod one. Both the helical gear two and the helical gear one are meshed with helical gears.

[0023] Preferably, the rinsing assembly includes a groove, an installation slot is provided inside the groove, a water inlet pipe is fixedly installed inside the installation slot, a rotating block is rotatably installed inside the groove via a rotating assembly, a nozzle is fixedly installed on the outer surface of the rotating block, and a telescopic hose is installed between the nozzle and the water inlet pipe.

[0024] Preferably, the rotating assembly includes a rotating rod three, which is fixedly connected to the rotating block through it. The rotating block has a slot inside. A spur gear is fixedly connected to the outer surface of the rotating rod three. A sliding groove is formed between the groove and the limiting groove. A slider is slidably connected inside the sliding groove. A toothed rod is fixedly connected to the top of the slider and meshes with the spur gear. A support rod is fixedly connected to the bottom of the slider. A spring is sleeved on the outer surface of the support rod. The limiting ring has multiple slots at its top. A locking block is fixedly connected to the bottom of the support rod and engages with the slot.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. The water-based drilling fluid anti-high temperature plugging agent and its preparation method and apparatus of the present invention utilize the adsorption and particle distribution characteristics of walnut shell powder to form a certain physical barrier during the plugging process. Calcium silicate exhibits good high-temperature stability, can withstand high temperatures, is not prone to thermal degradation, and has good plugging ability. Mica flakes possess excellent thermal stability and high-temperature resistance, enabling the plugging agent to maintain stable physical properties in high-temperature environments and fill pores during the plugging process to prevent drilling fluid leakage. Furthermore, the addition of fiber materials increases the adhesiveness and strength of the plugging agent. Sodium silicate has high thermal stability, maintaining good structure and function at high temperatures, allowing the plugging agent to adapt to stable high-temperature environments. Dispersants and lubricants improve the dispersibility and flowability of the plugging agent, helping it function under different operating conditions. Therefore, this plugging agent is made by combining organic and inorganic raw materials, thereby enhancing its high-temperature resistance and plugging effect.

[0027] 2. The water-based drilling fluid anti-high temperature plugging agent and its preparation method and apparatus described in this invention, through screening the solid raw materials inside the reaction vessel, helps to remove unsuitable coarse particles and ensures that the fineness of the raw materials meets the requirements. The screened raw materials are easier to further process and mix, improving the quality of the final product. The screened raw materials can be ground to achieve the required particle size, which can effectively improve the dispersibility of the raw materials and prevent large particles from settling in subsequent mixing. Furthermore, rinsing allows the ground raw materials to effectively leave the mixing area, thus preventing particle adhesion or accumulation. It also allows the raw material particles to better contact with water, further promoting the dispersion of raw material particles, which is conducive to uniform mixing in subsequent stirring. It can also save subsequent mixing time and stirring workload. The ground and screened raw materials are easier to blend with the base liquid and other additives, reducing friction and resistance in the mixing process, thereby improving production efficiency. Attached Figure Description

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the preparation method of the water-based drilling fluid anti-high temperature plugging agent in this invention;

[0030] Figure 2 This is a schematic diagram illustrating the specific operation of the grinding and stirring device in this invention;

[0031] Figure 3 This is a schematic diagram of the grinding and stirring device in this invention;

[0032] Figure 4 This is a partial orthogonal sectional view of the reactor body in this invention;

[0033] Figure 5 yes Figure 4 Enlarged view of a portion of point A in the middle;

[0034] Figure 6 This is a schematic diagram of the internal structure of the reactor body in this invention;

[0035] Figure 7 yes Figure 6 Enlarged view of a section at point B in the middle;

[0036] Figure 8 This is a partial right sectional view of the reactor body in this invention;

[0037] Figure 9 yes Figure 8 Enlarged view of a section at point C.

[0038] In the diagram: 1. Support frame; 2. Reactor body; 3. Motor; 4. Rotating rod one; 5. Stirring rod; 6. Screening plate; 7. Connecting plate; 8. Fixing rod; 9. Support cylinder; 10. Nozzle; 11. Limiting groove; 12. Limiting ring; 13. Slot; 14. Screening hole; 15. Grinding plate; 16. Inner groove; 17. Electric push rod; 18. Rotating cylinder; 19. Supporting ring; 20. Helical gear one; 21. Helical gear two; 22. Helical gear three; 23. Rotating rod two; 24. Mounting hole; 25. Water inlet pipe; 26. Mounting groove; 27. Telescopic hose; 28. Groove; 29. ​​Rotating rod three; 30. Spur gear; 31. Slot; 32. Slide groove; 33. Sliding block; 34. Support rod; 35. Spring; 36. Locking block; 37. Gear; 38. Rotating block. Detailed Implementation

[0039] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0040] The water-based drilling fluid anti-high temperature plugging agent of the present invention is composed of the following raw materials in parts by weight: 20-30 parts of walnut shell powder, 10-20 parts of calcium silicate, 5-10 parts of mica flakes, 10-17 parts of structural reinforcing agent, 1-3 parts of dispersant, and 1-2 parts of lubricant.

[0041] The structural reinforcing agent is composed of 5-10 parts of fiber material and 5-7 parts of sodium silicate, the dispersant is a phosphate ester dispersant, and the lubricant is a silane compound lubricant.

[0042] Walnut shell powder, with its adsorption properties and particle distribution, forms a physical barrier during the plugging process. Calcium silicate exhibits excellent high-temperature stability, withstands high temperatures, is resistant to thermal degradation, and possesses good plugging ability. Mica flakes provide superior thermal stability and high-temperature resistance, ensuring stable physical properties in high-temperature environments and filling pores to prevent drilling fluid leakage. Adding fiber materials enhances the adhesiveness and strength of the plugging agent. Sodium silicate, with its high thermal stability, maintains good structure and function at high temperatures, allowing the plugging agent to adapt to stable, high-temperature environments. Dispersants and lubricants improve the dispersibility and flowability of the plugging agent, helping it function effectively under various operating conditions. Therefore, this plugging agent is made through a composite of organic and inorganic raw materials, thereby enhancing its high-temperature resistance and plugging effect.

[0043] like Figures 1 to 2 As shown, a method for preparing a water-based drilling fluid anti-high temperature plugging agent is described. This method, used to prepare the aforementioned water-based drilling fluid anti-high temperature plugging agent, includes the following steps:

[0044] S1. Prepare 20-30 parts of walnut shell powder, 10-20 parts of calcium silicate, 5-10 parts of mica flakes, 10-17 parts of structural reinforcing agent, 1-3 parts of dispersant, and 1-2 parts of lubricant according to the required weight. Pour the walnut shell powder, calcium silicate, and mica flakes into the grinding and stirring device, and add the aqueous solution after grinding and mixing.

[0045] S2. The structural reinforcing agent composed of fiber material and sodium silicate is added into the grinding and stirring device, and then ground and stirred by the grinding and stirring device to make the raw material uniform.

[0046] S3. Slowly add the dispersant and lubricant into the grinding and mixing device, and add them at a low stirring rate inside the grinding and mixing device, and stir evenly. After all the raw materials are mixed evenly, a water-based drilling fluid anti-high temperature plugging agent is made.

[0047] The specific operating steps of the grinding and stirring device in step S1 are as follows:

[0048] S11. Solid raw materials are added into the reactor body 2 through the upper feed pipe, and after being added, they are screened by the screening plate 6 and enter the stirring area at the bottom of the reactor body 2.

[0049] S12. The motor 3 drives the rotating rod 4 to rotate, and after the rotating rod 4 rotates, the grinding plate 15 and the screening plate 6 rotate in opposite directions through the transmission of the helical gear 20, the helical gear 21 and the helical gear 3 22 to grind the solid raw materials that cannot be screened, and make all the solid raw materials meet the requirements to pass through the screening hole 14.

[0050] S13. After the solid raw materials are ground and screened, water is introduced into the water inlet pipe 25 through an external water pump, and then sprayed through the nozzle 10 to rinse the top of the screening plate 6. During rinsing, the rotation of the screening plate 6 causes the nozzle 10 to swing and rinse.

[0051] S14. Liquid raw materials and water enter the stirring area below the reactor body 2 through the feed pipe in the middle, and the stirring rod 5 is rotated by the rotating rod 4 to achieve uniform mixing during stirring.

[0052] like Figures 3 to 9 As shown, a device for preparing a water-based drilling fluid anti-high temperature plugging agent is used. This device is applicable to the above-mentioned preparation method. The grinding and stirring device in step S includes a support frame 1. A reaction vessel body 2 is fixedly installed inside the support frame 1. A discharge pipe is connected to the lower right side of the reaction vessel body 2. A pipe cover is threadedly connected to the outer surface of the discharge pipe. A feed pipe is connected to the middle right side and the upper front surface of the reaction vessel body 2. A pipe cover is threadedly connected to the outer surface of the feed pipe.

[0053] The reactor body 2 has through-holes and slots on its upper and lower surfaces. A rotating rod 4 is rotatably connected between the opening and the slot via a bearing. A motor 3 is fixedly installed at the center of the top of the reactor body 2. The output end of the motor 3 extends into the opening and is fixedly connected to the rotating rod 4. Multiple evenly distributed stirring rods 5 are fixedly connected to the lower outer surface of the rotating rod 4.

[0054] A grinding assembly is provided between the outer surface of the rotating rod 4 and the upper interior of the reactor body 2, and a rinsing assembly is provided above the interior of the reactor body 2. The rinsing assembly and the grinding assembly are installed together.

[0055] During operation, the bottom of the support frame 1 is first placed against a flat ground to ensure stability of the device. The support frame 1 supports the reactor body 2. Then, the solid raw materials required for the preparation of the sealing agent are added into the reactor body 2 through the upper feed pipe. The motor 3 is powered on to activate the grinding component, which screens and grinds the solid raw materials before they enter the stirring area at the bottom of the reactor body 2. Next, the liquid raw materials enter the stirring area inside the reactor body 2 through the middle feed pipe. The motor 3 drives the rotating rod 4 and the stirring rod 5 to rotate, uniformly mixing the raw materials. After uniform mixing, the sealing agent is prepared. Then, the prepared sealing agent is removed from the reactor body 2 through the discharge pipe for use. The discharge pipe is opened and closed by the first pipe cover, and the feed pipe is opened and closed by the second pipe cover, thus meeting the needs during use. During the stirring process, the temperature can be controlled through the reactor body to ensure that the raw materials are stirred evenly at a suitable temperature. The controller on the 3 unit can control the rotation speed of the motor 3, and also control the rotation speed of the stirring rod 5 to meet the rotation speed requirements when adding different raw materials. At the same time, the solid raw materials are screened inside the reactor body 2, which helps to remove unsuitable coarse particles and ensures that the fineness of the raw materials meets the requirements. The screened raw materials are easier to further process and mix, improving the quality of the final product. The screened raw materials can be ground to achieve the required particle size, which can effectively improve the dispersibility of the raw materials and prevent large particles from settling in subsequent mixing. After rinsing, the ground raw materials can be effectively removed from the stirring area, thus avoiding particle adhesion or accumulation. It can also make the raw material particles contact water better and further promote the dispersion of raw material particles, which is conducive to the uniform mixing in subsequent stirring. It can also save subsequent mixing time and stirring workload. The ground and screened raw materials are easier to blend with the base liquid and other additives, reducing friction and resistance in the mixing process, thereby improving production efficiency.

[0056] In a preferred embodiment of the present invention, the grinding assembly includes a screening plate 6 disposed above the interior of the reactor body 2. The screening plate 6 has a plurality of uniformly distributed and through screening holes 14. A limiting groove 11 is formed above the inner side wall of the reactor body 2. A limiting ring 12 is rotatably connected inside the limiting groove 11. The limiting ring 12 is fixedly connected to the screening plate 6. The bottom end of a rotating rod 4 penetrates the screening plate 6 and is fixedly connected to the screening plate 6. During operation, solid raw materials added to the reactor body 2 are screened through the screening holes 14 on the screening plate 6. Solid raw materials that fail to pass the screening can be ground to pass through the screening holes 14 and enter the stirring area. At the same time, grinding allows the screening plate 6 to rotate. During rotation, the limiting ring 12 is rotatably connected inside the limiting groove 11 to limit the rotation and stabilize the rotation of the screening plate 6.

[0057] In a preferred embodiment of the present invention, a transmission assembly is provided above the outer surface of the rotating rod 4. Connecting plates 7 are provided on both the left and right sides of the transmission assembly. An inner groove 16 is formed inside the connecting plate 7, with its lower inner surface extending to the outside of the connecting plate 7. Electric push rods 17 are fixedly installed on both the left and right sides of the upper inner surface of the inner groove 16. The output ends of both electric push rods 17 extend to the outside of the connecting plate 7, and a grinding plate 15 is fixedly connected to the output end of each electric push rod 17. The top of the grinding plate 15 is in contact with the bottom of the connecting plate 7. During operation, the transmission assembly allows the rotating rod 4 to drive the connecting plate 7 to rotate, causing the grinding plate 15 on the connecting plate 7 and the screening plate 6 to rotate simultaneously to grind the unscreened solid raw materials. The ground raw materials then pass through the screening holes 14. Simultaneously, the electric push rods 17 are energized during grinding, controlling the movement and adjustment of the grinding plate 15 to grind the solid raw materials, resulting in a better grinding effect.

[0058] In a preferred embodiment of the present invention, the transmission assembly includes a plurality of fixed rods 8 fixedly connected to the upper inner wall of the reactor body 2 and evenly distributed thereon. A support cylinder 9 is fixedly connected between the plurality of fixed rods 8. A support ring 19 is fixedly connected to the lower part of the support cylinder 9. A rotating cylinder 18 is rotatably connected to the inside of the support ring 19 through a bearing 2. The lower part of the outer surface of the rotating cylinder 18 extends to the outside of the support cylinder 9. The rotating cylinder 18 is fixedly connected to the connecting plate 7. A helical gear 20 is fixedly connected to the upper part of the outer surface of the rotating cylinder 18. An installation hole 24 is opened at the center of the inner wall of the support cylinder 9. A rotating rod 23 is rotatably connected to the inside of the installation hole 24 through a bearing 3. A helical gear 3 22 is fixedly connected to one end of the rotating rod 23. The bottom end of the rotating rod 4 passes through the rotating cylinder 18. A helical gear 21 is fixedly connected to the upper part of the inner wall of the support cylinder 9 on the outer surface of the rotating rod 4. Both the helical gear 21 and the helical gear 20 are meshed with helical gears. The helical gear 20 and the helical gear 21 are arranged parallel to each other.

[0059] During operation, the rotating rod 4 drives the helical gear 21 to rotate, and the rotation of the helical gear 21 drives the helical gear 3 to rotate under the limit of the rotating rod 23. The rotation of the helical gear 3 drives the helical gear 20 to rotate. Then the helical gear 20 and the helical gear 21 can rotate simultaneously in opposite directions. This makes the screening plate 6, which is fixedly connected to the rotating rod 4, and the connecting plate 7, which is connected to the helical gear 20 through the rotating cylinder 18, rotate in opposite directions to the grinding plate 15, thus achieving a better grinding effect. At the same time, the helical gear 20, the helical gear 21, and the helical gear 32 are connected to the support cylinder 9 and the reactor body 2 through the fixing rod 8. The rotating cylinder 18 is connected to the support cylinder 9 through the support ring 19. Since the rotating rod 4 passes through the rotating cylinder 18, the rotation of the rotating rod 4 will not affect the rotation of the rotating cylinder 18, and the two rotation directions are opposite.

[0060] In a preferred embodiment of the present invention, the rinsing assembly includes a groove 28 formed above the inner wall of the reactor body 2. A through-type mounting groove 26 is formed on the rear surface of the groove 28. A water inlet pipe 25 is fixedly installed inside the mounting groove 26, and the rear end of the water inlet pipe 25 extends to the outside of the reactor body 2. A rotating block 38 is rotatably mounted inside the groove 28 via a rotating assembly. A nozzle 10 is fixedly mounted on the outer surface of the rotating block 38. A telescopic hose 27 is connected between the nozzle 10 and the water inlet pipe 25. The nozzle 10 extends into the interior of the reactor body 2. During operation, water is pumped into the inlet pipe 25 by an external water pump, and the water inside the inlet pipe 25 enters the nozzle 10 through the telescopic hose 27 and is sprayed out. The nozzle 10 sprays water to rinse the screening plate 6, and works in conjunction with the rotating screening plate 6 to rinse it, so that the raw materials on the screening plate 6 can be washed away. At the same time, the rotating component allows the nozzle 10 to swing up and down to increase the rinsing range, which improves the rinsing effect and makes it easier to clean the screening plate 6, thereby avoiding waste of raw materials.

[0061] In a preferred embodiment of the present invention, the rotating assembly includes a rotating rod 29 rotatably connected between the left and right sides inside the groove 28. The rotating rod 29 passes through the rotating block 38 and is fixedly connected to the rotating block 38. A through slot 31 is formed inside the rotating block 38. A spur gear 30 is fixedly connected to the outer surface of the rotating rod 29 within the slot 31. A sliding groove 32 is formed between the groove 28 and the limiting groove 11. A slider 33 is slidably connected inside the sliding groove 32. A toothed rod 37 is fixedly connected to the top of the slider 33. The top end of the rack 37 extends into the slot 31. The rack 37 meshes with the spur gear 30. The bottom of the slider 33 is fixedly connected to a support rod 34. A spring 35 is sleeved on the outer surface of the support rod 34. The top and bottom ends of the spring 35 are fixedly connected to the inner wall of the slide groove 32 and the outer surface of the support rod 34, respectively. The top of the limiting ring 12 has multiple evenly distributed slots 13. The bottom end of the support rod 34 is fixedly connected to a block 36. The block 36 is engaged in the slot 13. The outer surface of the block 36 and the inner wall of the slot 13 are both arc-shaped.

[0062] During operation, the rotation of the screening plate 6 during the rinsing process causes the locking block 36 inside the slot 13 to be squeezed. This squeezing of the locking block 36 causes the support rod 34 and the slider 33 to slide within the groove 32. After the support rod 34 slides, it squeezes the spring 35, giving the spring 35 a rebound force. Then, the sliding of the slider 33 causes the toothed rod 37 to move. The movement of the toothed rod 37 causes the spur gear 30, which meshes with the toothed rod 37, to rotate. The rotation of the spur gear 30 then drives the rotating rod 29 to rotate, thereby causing the rotating block 38 to rotate. The telescopic mechanism... The tube 27 can extend and retract to cooperate with the rotation of the rotating block 38 and the nozzle 10. During the rotation of the screening plate 6, multiple slots 13 and the locking block 36 engage and disengage. When the locking block 36 corresponds to another slot 13, the rebound force of the spring 35 causes the support rod 34 to move and engage with the locking block 36 inside the slot 13, and causes the toothed rod 37 and the spur gear 30 to reset. Through the continuous rotation of the screening plate 6, the nozzle 10 can swing up and down, thereby repeatedly adjusting the rinsing range during the rinsing process, resulting in a better rinsing effect and more comprehensive rinsing.

[0063] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0064] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An apparatus for preparing a water-based drilling fluid anti-high temperature plugging agent, the apparatus being suitable for a method of preparing a water-based drilling fluid anti-high temperature plugging agent, characterized in that: The method includes the following steps: S1. Prepare 20-30 parts of walnut shell powder, 10-20 parts of calcium silicate, 5-10 parts of mica flakes, 10-17 parts of structural reinforcing agent, 1-3 parts of dispersant, and 1-2 parts of lubricant according to the required weight. Pour the walnut shell powder, calcium silicate, and mica flakes into the grinding and stirring device, and add the aqueous solution after grinding and mixing. S2. The structural reinforcing agent composed of fiber material and sodium silicate is added into the grinding and stirring device, and then ground and stirred by the grinding and stirring device to make the raw material uniform. S3. Slowly add the dispersant and lubricant into the grinding and mixing device, and add them at a low stirring rate inside the grinding and mixing device, and stir evenly. When all raw materials are mixed evenly, a water-based drilling fluid anti-high temperature plugging agent is made. The specific operating steps of the grinding and stirring device in step S1 are as follows: S11. Solid raw materials are added into the reactor body (2) through the feed pipe above, and after being added, they are screened by the screen plate (6) and enter the stirring area below the reactor body (2); S12. The motor (3) drives the rotating rod (4) to rotate. After the rotating rod (4) rotates, the grinding plate (15) and the screening plate (6) rotate in opposite directions through the transmission of the helical gear (20), the helical gear (21) and the helical gear (22) to grind the solid raw materials that cannot be screened, and make all the solid raw materials meet the requirements to pass through the screening hole (14). S13. After the solid raw materials are ground and screened, water is introduced into the water inlet pipe (25) through an external water pump, and then water is sprayed through the nozzle (10) to rinse the top of the screening plate (6). During rinsing, the nozzle (10) swings and rinses by rotating the screening plate (6). S14. Liquid raw materials and water enter the stirring area below the reactor body (2) through the feed pipe in the middle, and the stirring rod (5) is rotated by the rotating rod (4) to achieve uniform mixing during stirring. The grinding and stirring device in step S1 includes a support frame (1), and the reactor body (2) is fixed inside the support frame (1). The reactor body (2) is rotatably connected to a rotating rod (4), and a motor (3) is installed on the top of the reactor body (2). The output end of the motor (3) is fixedly connected to the rotating rod (4), and multiple stirring rods (5) are fixedly connected to the outer surface of the rotating rod (4). A grinding assembly is provided between the rotating rod (4) and the inside of the reactor body (2), and a rinsing assembly is provided inside the reactor body (2); The grinding assembly includes a screening plate (6), which has multiple screening holes (14) inside. The inner side wall of the reactor body (2) has a limiting groove (11), and a limiting ring (12) is rotatably connected inside the limiting groove (11). The limiting ring (12) is fixedly connected to the screening plate (6), and the rotating rod (4) is fixedly connected to the screening plate (6). The flushing assembly includes a groove (28), an installation groove (26) is provided inside the groove (28), an inlet pipe (25) is fixedly installed inside the installation groove (26), a rotating block (38) is rotatably installed inside the groove (28) via a rotating assembly, a nozzle (10) is fixedly installed on the outer surface of the rotating block (38), and a telescopic hose (27) is installed between the nozzle (10) and the inlet pipe (25). The rotating assembly includes a rotating rod three (29), which is fixedly connected to the rotating block (38). The rotating block (38) has a slot (31) inside. A spur gear (30) is fixedly connected to the outer surface of the rotating rod three (29). A sliding groove (32) is provided between the groove (28) and the limiting groove (11). A slider (33) is slidably connected inside the sliding groove (32). A toothed rod (37) is fixedly connected to the top of the slider (33). The toothed rod (37) meshes with the spur gear (30). A support rod (34) is fixedly connected to the bottom of the slider (33). A spring (35) is sleeved on the outer surface of the support rod (34). A plurality of slots (13) are provided at the top of the limiting ring (12). A locking block (36) is fixedly connected to the bottom of the support rod (34). The locking block (36) is locked inside the slot (13).

2. The apparatus for preparing the water-based drilling fluid anti-high temperature plugging agent according to claim 1, characterized in that: A transmission assembly is provided above the outer surface of the rotating rod (4). A connecting plate (7) is provided on both the left and right sides of the transmission assembly. An inner groove (16) is provided inside the connecting plate (7). An electric push rod (17) is fixedly installed on both the left and right sides inside the inner groove (16). A grinding plate (15) is fixedly connected to the output end of the electric push rod (17).

3. The apparatus for preparing the water-based drilling fluid anti-high temperature plugging agent according to claim 2, characterized in that: The transmission assembly includes multiple fixed rods (8), and a support cylinder (9) is fixedly connected between the multiple fixed rods (8). A support ring (19) is fixedly connected to the lower part of the support cylinder (9). A rotating cylinder (18) is rotatably connected inside the support ring (19). The rotating cylinder (18) is fixedly connected to the connecting plate (7). A helical gear (20) is fixedly connected above the outer surface of the rotating cylinder (18). An installation hole (24) is opened at the center of the inner side wall of the support cylinder (9). A rotating rod (23) is rotatably connected inside the installation hole (24). A helical gear (22) is fixedly connected to one end of the rotating rod (23). A helical gear (21) is fixedly connected to the outer surface of the rotating rod (4). The helical gear (21) and the helical gear (20) are both meshed with helical gears.

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