Shearing anti-caking drilling mud preparation system

Abstract

The utility model discloses a shearing anti-caking drilling mud preparation system, and belongs to the technical field of oil field drilling mud treatment equipment. The configuration system has a shear pump, a jet funnel, an agitator, and a frame. A discharging port of the shearing pump is connected with an input end of the jet flow funnel through a pipeline, an output end of the jet flow funnel is connected with a feeding port of the stirrer through a conveying pipe for conveying a mixture formed by materials added into the jet flow funnel and sheared slurry, and a rotatable curtain is installed in the conveying pipe. A plurality of long-strip sharp teeth for rubbing, paving and crushing the mixture are fixedly distributed on the inner wall of the curtain; and a plurality of pits for delaying the conveying of the mixture are formed between every two adjacent long-strip sharp teeth and on the inner wall of the curtain. When the drilling mud is conveyed in the conveying pipe, the mixture is convenient to mix in the conveying pipe, does not agglomerate and is smoothly conveyed, and the problems that the preparation time of the drilling mud is long and the conveying efficiency is low are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of oilfield drilling mud treatment equipment, and in particular relates to a drilling mud preparation system, specifically a shearing and anti-caking drilling mud preparation system. Background Technology

[0002] Drilling mud, also known as drilling fluid, plays a crucial role in drilling operations. Its primary function is to carry rock cuttings from the bottom of the well to the surface. With the development of oilfield technology, drilling mud has evolved from simply meeting the needs of drill bit movement to adapting to various drilling requirements. Currently, the equipment used for preparing drilling mud mostly consists of a shear pump, a jet funnel, and a mixer. The delivery pipe connecting the output end of the jet funnel and the input end of the mixer is approximately 1.5 meters long. The advantage of existing drilling mud equipment is its high shear rate. However, a disadvantage is that the mixture formed by the materials added to the jet funnel (such as polymers) and the sheared mud is difficult to mix in the delivery pipe, easily clumping together and forming clumps, hindering smooth transport, reducing efficiency, and prolonging mud preparation time.

[0003] Relevant patent document CN213732645U discloses a slurry mixing and filling skid main module, including an electrical control cabinet, a mixing tank, a mud pump, a vortex funnel, a jet funnel, a shear pump, and a slurry mixing tank. The electrical control cabinet is electrically connected to the mixing tank, mud pump, shear pump, and slurry mixing tank. The output end of the mixing tank is connected to the input end of the mud pump via a pipe, and the input end of the mixing tank is connected to the vortex funnel and the jet funnel via pipes. The output end of the mud pump is connected to the vortex funnel and the jet funnel via pipes, and the output end of the vortex funnel is connected to the mixing tank and the slurry mixing tank via pipes. The input end of the vortex funnel is connected to external equipment via a pipe. The output end of the jet funnel is connected to the mixing tank, shear pump, and slurry mixing tank via pipes. Material enters the vortex funnel through pipes, and after being mixed in the vortex funnel and meeting the design standards, the material enters the slurry mixing tank through pipes to complete the slurry mixing operation. The main module of this slurry preparation and injection skid has a complex structure, many process steps, and a long slurry preparation time. Utility Model Content

[0004] The purpose of this invention is to provide a shearing and anti-caking drilling mud preparation system, which enables the mixture formed by the material added in the jet funnel and the sheared mud to be easily mixed in the conveying pipe, without clumping, and ensuring smooth conveying, thereby solving the problems of long drilling mud preparation time and low conveying efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A shearing anti-caking drilling mud preparation system includes a shearing pump, a jet funnel, a mixer, and a frame. The shearing pump has an inlet port for incoming mud, which enters through the inlet port. The outlet port of the shearing pump is connected to the inlet of the jet funnel via a pipe. The outlet of the jet funnel is connected to the inlet of the mixer via a conveying pipe that transports the mixture formed by the material added in the jet funnel and the sheared mud. The mixer has an outlet port that sends the stirred mud into a mud tank. The technical solution is that a rotatable curtain is installed inside the conveying pipe. Multiple long, pointed teeth are fixedly distributed on the inner wall of the curtain to scrape, spread, and break up the mixture (i.e., the conveyed mixture). Between two adjacent long, pointed teeth, multiple pits are provided on the inner wall of the curtain to slow down the transport of the mixture.

[0007] In the above technical solution, the preferred embodiment is that each of the elongated pointed teeth extends along the length of the curtain, and the cross-section of each elongated pointed tooth is triangular, with the apex of the triangle located at the top of the cross-section; between two adjacent elongated pointed teeth, multiple recesses on the inner wall of the curtain are evenly distributed along the length of the curtain. The structure in which a rotatable curtain is installed inside the conveying pipe can be such that a fixed shaft passes horizontally through the upper part of the conveying pipe, and the curtain, which can rotate around the fixed shaft, is connected to the fixed shaft, with its upper end fitted onto the fixed shaft. Each recess is preferably spherical, but it can also be of other shapes, such as elliptical. The angle β between the rotation center line of the conveying pipe and the horizontal plane is preferably 50°~55°. An angle β can be 54°. Using an angle β of 50°~55° makes the structure of the conveying pipe compatible with the curtain, resulting in more reliable curtain operation.

[0008] In the above technical solution, the preferred embodiment is that the agitator includes a variable frequency speed-regulating first agitator and a variable frequency speed-regulating second agitator; the output end of the jet funnel is connected to the inlet of the variable frequency speed-regulating first agitator via a conveying pipe, and the outlet of the variable frequency speed-regulating first agitator is connected to the inlet of the variable frequency speed-regulating second agitator via a pipeline; the outlet for sending the stirred slurry into the slurry tank is located on the variable frequency speed-regulating second agitator, and the stirred slurry enters the slurry tank through the outlet of the variable frequency speed-regulating second agitator. The bottoms of both the variable frequency speed-regulating first agitator and the variable frequency speed-regulating second agitator are limited and supported by the frame. The aforementioned pipeline includes a lower horizontal section, a vertical section, and an upper horizontal section. One end of the lower horizontal section is connected to the outlet of the first variable frequency speed-regulating agitator, and the other end is connected to the lower end of the vertical section. The upper end of the vertical section is connected to one end of the upper horizontal section, and the other end of the upper horizontal section is connected to the inlet of the second variable frequency speed-regulating agitator. The bottom of both the lower horizontal section and the bottom of the vertical section are supported by the frame. The aforementioned curtain can be a flat panel or a curved panel. The curtain can be made of steel, aluminum, plastic, or rubber. The agitator of this invention uses two variable frequency speed-regulating agitators connected in series (i.e., variable frequency speed-regulating first agitator and variable frequency speed-regulating second agitator). The material added in the jet funnel (such as polymer) and the sheared mud form the conveyed mixture. The mixture is conveyed through the conveying pipe to the variable frequency speed-regulating first agitator, and then to the variable frequency speed-regulating second agitator for further dispersion and mixing. This accelerates the dissolution rate and uniform mixing of the mixture, further improving the quality and efficiency of mud preparation.

[0009] In this invention, a rotatable curtain is installed inside the conveying pipe. Multiple elongated sharp teeth are fixedly distributed on the inner wall of the curtain, serving to scrape, spread, and break up the mixture. Between adjacent elongated sharp teeth, the inner wall of the curtain has multiple recesses that slow down the conveying of the mixture. Thus, when the mixture formed by the material added to the jet funnel (such as a polymer) and the sheared slurry is conveyed in the conveying pipe, the curtain rotates counterclockwise around a fixed axis by the thrust of the mixture. The inner wall of the curtain and the multiple elongated sharp teeth scrape the mixture, spreading it. This facilitates mixing in the conveying pipe, prevents clumping (avoiding clumping), ensures smooth conveying, and increases conveying efficiency. Furthermore, each elongated sharp tooth breaks up the particles in the mixture it encounters, facilitating the full hydration of the particles. This system lays the foundation for the subsequent mixing and dispersion of the mixture in the agitator. Simultaneously, as the mixture is conveyed in the delivery pipe, multiple depressions impede and slow its transport, and some of the mixture enters these depressions, facilitating the full hydration of the mixture (especially the particles). The mixture in the depressions is pushed out by subsequent batches, further preparing it for the agitator's subsequent mixing and dispersion. Conversely, when the delivery pipe stops conveying the mixture, the curtain falls under its own weight, with its bottom end abutting the inner wall of the delivery pipe. Tests have shown that, under the same conditions, compared to existing drilling mud equipment, the drilling mud preparation time using this invention is reduced by more than 10%, and the system also exhibits high reliability and is less prone to failure.

[0010] In summary, this invention provides a shear-resistant, anti-caking drilling mud preparation system. It enables the mixture formed by the materials added in the jet funnel and the sheared mud to mix easily and prevent clumping during transport in the delivery pipe, ensuring smooth conveying and solving the problems of long drilling mud preparation time and low conveying efficiency. This invention meets users' requirements for preparing high-performance mud, effectively mixing and fully hydrating the materials added to the drilling fluid, shortening mud preparation time, and producing mud with excellent performance. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model (front view).

[0012] Figure 2 This is a schematic diagram of the structure of this utility model (left view).

[0013] Figure 3This is a schematic diagram (three-dimensional view) of the structure connecting the conveying pipe 201, the variable frequency speed-regulating first stirrer 301, and the variable frequency speed-regulating second stirrer 302 described in this utility model.

[0014] Figure 4 This is a schematic diagram of the connection between the conveying pipe 201 and the curtain 6 in this utility model (when the conveying pipe 201 stops conveying the mixture).

[0015] Figure 5 for Figure 4 A cross-sectional view along line AA.

[0016] Figure 6 This is a schematic diagram (three-dimensional view) of the structure of the curtain 6 in this utility model.

[0017] Figure 7 This is a schematic diagram of the connection between the conveying pipe 201 and the curtain 6 in this utility model (when the conveying pipe 201 conveys the mixture). Detailed Implementation

[0018] To make the invention's objectives, technical solutions, and advantages clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] Example 1: As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, the shearing anti-caking drilling mud preparation system of this utility model includes a shear pump 1, a jet funnel 2, a mixer 3, a frame 5, and an electrical control cabinet 4. The shear pump 1 has an inlet port 100 for incoming mud, which enters through this port. The outlet port 102 of the shear pump 1 is connected to the input end of the jet funnel 2 via a pipe 101. The output end of the jet funnel 2 is connected to the inlet of the mixer 3 via a conveying pipe 201 that transports the mixture formed by the material added in the jet funnel and the sheared mud. The mixer 3 has an outlet port 3021 for sending the stirred mud into the mud tank. The shear pump 1 uses a commercially available JQB type shear pump, which saves bentonite and has high shearing efficiency. The bases of the shear pump 1 and the jet funnel 2 are both fixedly installed on the upper surface of the frame 5. A rotatable curtain 6 is installed inside the aforementioned conveying pipe 201. Multiple elongated sharp teeth 601 are fixedly distributed on the inner wall of the curtain 6, serving to scrape, spread, and break up the mixture. Between each adjacent pair of elongated sharp teeth 601, the inner wall of the curtain 6 has multiple recesses 602 that slow down the conveying of the mixture. Each elongated sharp tooth 601 extends along the length of the curtain 6, and the cross-section of each elongated sharp tooth 601 is triangular, with the apex of the triangle located at the top of the cross-section. Between each adjacent pair of elongated sharp teeth 601, the multiple recesses 602 on the inner wall of the curtain 6 are evenly distributed along the length of the curtain 6.

[0020] like Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the structure in which a rotatable curtain 6 is installed inside the aforementioned conveying pipe 201 is such that a fixed shaft 600 passes horizontally through the upper part of the conveying pipe 201, and the curtain 6, which can rotate around the fixed shaft 600, is connected to the fixed shaft 600. The upper end of the curtain 6 is fitted onto the fixed shaft 600. Each of the recesses 602 is spherical. Of course, each of the recesses 602 can also be other shapes, for example, each of the recesses 602 can also be elliptical. The angle β between the rotation center line of the aforementioned conveying pipe 201 and the horizontal plane is 50°~55°. In this embodiment, the angle β is 54°. The angle β of 50°~55° makes the structure of the conveying pipe 201 compatible with that of the curtain 6, and the curtain 6 works more reliably.

[0021] like Figure 1 , Figure 2 , Figure 3As shown, the aforementioned agitator 3 includes a variable frequency speed-regulating first agitator 301 and a variable frequency speed-regulating second agitator 302. The output end of the aforementioned jet funnel 2 is connected to the inlet of the variable frequency speed-regulating first agitator 301 via a conveying pipe 201. The outlet of the variable frequency speed-regulating first agitator 301 is connected to the inlet of the variable frequency speed-regulating second agitator 302 via a pipe 300. The outlet 3021 of the agitated slurry is located on the variable frequency speed-regulating second agitator 302, and the agitated slurry enters the slurry tank through the outlet 3021 of the variable frequency speed-regulating second agitator 302. The bottoms of both the variable frequency speed-regulating first agitator 301 and the variable frequency speed-regulating second agitator 302 are limited and supported by the frame 5. The aforementioned pipeline 300 includes a lower horizontal section 3001, a vertical section 3002, and an upper horizontal section 3003. One end of the lower horizontal section 3001 is connected to the outlet of the variable frequency speed-regulating first agitator 301, and the other end of the lower horizontal section 3001 is connected to the lower end of the vertical section 3002. The upper end of the vertical section 3002 is connected to one end of the upper horizontal section 3003, and the other end of the upper horizontal section 3003 is connected to the inlet of the variable frequency speed-regulating second agitator 302. The bottom of the lower horizontal section 3001 and the bottom of the vertical section 3002 are both limited and supported by the frame 5. The aforementioned curtain 6 can be a flat panel or a curved panel; in this embodiment, a flat panel is used. The curtain 6 can be a steel sheet, an aluminum plate, a plastic plate, a rubber plate, or an iron plate; in this embodiment, a steel sheet is used, although an aluminum plate can also be used.

[0022] The agitator 3 of this invention uses two variable frequency speed-regulating agitators connected in series (i.e., variable frequency speed-regulating first agitator 301 and variable frequency speed-regulating second agitator 302). The material added in the jet funnel 2 (such as polymer) and the sheared mud form the conveyed mixture. The mixture is conveyed to the variable frequency speed-regulating first agitator 301 through the conveying pipe 201, and then to the variable frequency speed-regulating second agitator 302, which further disperses and mixes the mixture, accelerates the dissolution rate and uniform mixing of the mixture, and further improves the quality and efficiency of mud preparation.

[0023] like Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, when the mixture formed by the material added to the jet funnel 2 (such as a polymer) and the sheared slurry is conveyed in the conveying pipe 201, the curtain 6 rotates counterclockwise around the fixed axis 600 by the thrust of the mixture. (See also...) Figure 7The inner wall of the curtain 6 and the multiple long, pointed teeth 601 will scrape against the mixture, thus spreading it out. This facilitates mixing in the conveying pipe 201, prevents clumping, ensures smooth conveying, and increases conveying efficiency. Furthermore, each of the long, pointed teeth 601 will break up the particles in the mixture, promoting thorough hydration and laying a foundation for further dispersion and mixing in the variable-frequency speed-controlled first agitator 301 and the variable-frequency speed-controlled second agitator 302. When the mixture is conveyed in the conveying pipe 201, the multiple recesses 602 will hinder and delay the conveying of the mixture, and a portion of the mixture will enter the multiple recesses 602, facilitating the full hydration of the mixture (especially the particles in the mixture). The mixture that has entered the multiple recesses 602 will be pushed out by the mixture coming later. This also lays a good foundation for the mixture to be further dispersed and mixed by the variable frequency speed-controlled first agitator 301 and variable frequency speed-controlled second agitator 302. Conversely, when the conveying pipe 201 stops conveying the mixture, the curtain 6 falls down by its own weight. See Figure 4 At this point, the bottom end of the curtain 6 abuts against the inner wall of the delivery pipe 201. Tests have shown that, under the same conditions, compared to existing drilling mud equipment, the drilling mud preparation time using this invention is reduced by more than 10%, and the drilling mud preparation system is also highly reliable and less prone to failure.

[0024] Regarding Embodiment 1, when the shearing anti-caking drilling mud preparation system of this utility model is working, the incoming mud enters the shear pump 1 from the inlet port 100. The sheared mud enters the input end of the jet funnel 2 from the outlet port 102 of the shear pump 1 through the pipe 101. The mixture formed by the material added in the jet funnel 2 and the sheared mud is sent from the output end of the jet funnel 2 to the agitator 3 through the conveying pipe 201. The agitator 3 includes a variable frequency speed-regulating first agitator 301 and a variable frequency speed-regulating second agitator 302. In this way, the mixture is sent from the output end of the jet funnel 2 through the conveying pipe 201, and is scraped, spread, and further processed by the curtain 6. The hydrated material is fed into the inlet of the first variable frequency speed-controlled agitator 301. The mixture is dispersed and mixed within the first variable frequency speed-controlled agitator 301 to obtain a slurry for the first mixing process. This slurry is then fed from the outlet of the first variable frequency speed-controlled agitator 301 through the lower horizontal section 3001, the vertical section 3002, and the upper horizontal section 3003 into the inlet of the second variable frequency speed-controlled agitator 302. The slurry is further dispersed and mixed within the second variable frequency speed-controlled agitator 302 to obtain a slurry for the second mixing process. This second-processed slurry is then fed into a slurry tank through the outlet 3021 of the second variable frequency speed-controlled agitator 302. This slurry tank can be connected to the inlet 100 of the shear pump 1 to achieve slurry circulation processing.

[0025] In summary, the above embodiments of this utility model provide a shear-resistant anti-caking drilling mud preparation system. This system ensures that the mixture formed by the material added to the jet funnel 2 and the sheared mud is easily mixed and does not clump during transport in the delivery pipe 201, resulting in smooth transport and solving the problems of long drilling mud preparation time and low transport efficiency. This utility model meets the user's requirements for preparing high-performance mud, effectively mixes and fully hydrates the materials added to the drilling fluid, shortens mud preparation time, and produces mud with excellent performance.

Claims

1. A shearing anti-caking drilling mud preparation system, comprising a shearing pump (1), a jet funnel (2), a mixer (3), and a frame (5), wherein the shearing pump (1) has an inlet port (100) for incoming mud, the outlet port (102) of the shearing pump (1) is connected to the input end of the jet funnel (2) via a pipe (101), the output end of the jet funnel (2) is connected to the inlet of the mixer (3) via a conveying pipe (201) for conveying a mixture formed by the material added in the jet funnel and the sheared mud, and the mixer (3) has an outlet port (3021) for sending the stirred mud into a mud tank, characterized in that The aforementioned conveying pipe (201) is equipped with a rotatable curtain (6). The inner wall of the curtain (6) is fixedly distributed with a plurality of long, pointed teeth (601) that act to scrape, spread and crush the mixture. Between two adjacent long, pointed teeth (601), the inner wall of the curtain (6) has a plurality of pits (602) that act to delay the conveying of the mixture.

2. The shear anti-slugging drilling mud formulation system of claim 1, wherein Each of the elongated serrations (601) extends along the length of the curtain (6), and between two adjacent elongated serrations (601), a plurality of recesses (602) on the inner wall of the curtain (6) are evenly distributed along the length of the curtain (6).

3. The shear anti-slugging drilling mud formulation system of claim 1, wherein The structure in which the rotatable curtain (6) is installed in the above-mentioned conveying pipe (201) is that a fixed shaft (600) passes through the upper part of the conveying pipe (201), and the curtain (6) that can rotate around the fixed shaft (600) is connected to the fixed shaft (600). The upper end of the curtain (6) is fitted on the fixed shaft (600).

4. The shear anti-slugging drilling mud formulation system of claim 1, wherein Each of the said pits (602) is spherical.

5. The shear anti-slugging drilling mud formulation system of claim 1, wherein Each of the said pits (602) is elliptical.

6. The shear anti-slugging drilling mud formulation system of claim 1, wherein The angle β between the rotation center line of the above-mentioned conveying pipe (201) and the horizontal plane is 50°~55°.

7. The shear anti-slugging drilling mud formulation system of claim 1, wherein The above-mentioned stirrer (3) includes a variable frequency speed control first stirrer (301) and a variable frequency speed control second stirrer (302). The output end of the jet funnel (2) is connected to the inlet of the variable frequency speed-regulating first agitator (301) through the conveying pipe (201). The outlet of the variable frequency speed-regulating first agitator (301) is connected to the inlet of the variable frequency speed-regulating second agitator (302) through the pipeline (300). The outlet (3021) that sends the stirred mud into the mud tank is located on the variable frequency speed-regulating second agitator (302). The bottom of the variable frequency speed-regulating first agitator (301) and the bottom of the variable frequency speed-regulating second agitator (302) are both limited and supported by the frame (5).

8. The shear anti-slugging drilling mud formulation system of claim 7, wherein The above-mentioned pipeline (300) includes a lower horizontal section (3001), a vertical section (3002), and an upper horizontal section (3003). One end of the lower horizontal section (3001) is connected to the discharge port of the variable frequency speed-regulating first agitator (301), and the other end of the lower horizontal section (3001) is connected to the lower end of the vertical section (3002). The upper end of the vertical section (3002) is connected to one end of the upper horizontal section (3003), and the other end of the upper horizontal section (3003) is connected to the feed port of the variable frequency speed-regulating second agitator (302). The bottom of the lower horizontal section (3001) and the bottom of the vertical section (3002) are both limited and supported by the frame (5).

9. The shear anti-slugging drilling mud formulation system of claim 1, wherein The curtain (6) mentioned above is a flat or curved panel.

10. The shear anti-slugging drilling mud formulation system of claim 1, wherein The curtain (6) mentioned above is made of steel sheet, aluminum plate, plastic plate or rubber plate.

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