A mixing device for nitrogen foam fracturing

Abstract

This utility model relates to the field of nitrogen foam fracturing mixing technology, and more particularly to a mixing device for nitrogen foam fracturing, including a stirring mechanism. The bottom end of the stirring mechanism vertically penetrates the middle of the top of a mixing cylinder. A foaming agent storage tank is transversely inserted through one side of the top of the mixing cylinder; a fracturing fluid storage tank is transversely inserted through the other side of the top of the mixing cylinder; and a nitrogen cylinder group is transversely inserted through the rear side of the top of the mixing cylinder. In this device, the stirring mechanism can efficiently mix materials, its scraper can reduce waste and residue, the shut-off valve A can control the discharge timing, the pressure gauge can ensure safety, the first throttle valve can adjust the flow rate to ensure a suitable ratio, the filtration mechanism can achieve multi-stage filtration to remove impurities, the second throttle valve can adjust the flow rate to ensure accurate ratio and improve purity, the three cylinders of the nitrogen cylinder group ensure gas supply, the diversion and summing pipe provides stable delivery, the shut-off valve B can control on / off, the pressure reducing valve can prevent equipment damage, and the third throttle valve adjusts the flow rate to ensure the ratio.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen foam fracturing mixing technology, specifically to a mixing device for nitrogen foam fracturing. Background Technology

[0002] Nitrogen foam fracturing is a production enhancement technology used in oil and gas reservoir stimulation. It involves mixing nitrogen with fracturing fluid and a foaming agent in a specific ratio to form a foam system. Utilizing the low filtration loss and high proppant carrying capacity of foam, this system is injected into the reservoir to create and support fractures, thereby improving oil and gas flow channels and increasing recovery rates. The mixing unit is the core equipment of this technology, primarily used to achieve uniform mixing of nitrogen, fracturing fluid, and foaming agent. By controlling the proportions and mixing intensity of each component, a stable nitrogen foam fracturing fluid is formed, providing a suitable working medium for fracturing operations.

[0003] Current mixing devices suffer from uneven mixing, poor foam stability, low flow rate control accuracy, and easy imbalance of component ratios. They also lack filtration, making the equipment prone to clogging by impurities, and have unstable pressure control, posing safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide a mixing device for nitrogen foam fracturing to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mixing device for nitrogen foam fracturing, including a stirring mechanism, the bottom end of which vertically penetrates the middle of the top of a mixing cylinder, and a foaming agent storage tank is transversely penetrated on one side of the top of the mixing cylinder;

[0006] A fracturing fluid storage tank extends laterally through the top of the mixing cylinder on the other side.

[0007] A nitrogen cylinder assembly extends laterally through the rear top of the mixing cylinder;

[0008] The bottom of the fracturing fluid storage tank is equipped with a filtration mechanism;

[0009] The bottom of the mixing cylinder is equipped with a drain pipe.

[0010] The beneficial effects of this utility model are as follows: the stirring mechanism can efficiently mix materials, the scraper can reduce waste and residue, the shut-off valve A of the drain pipe can control the discharge timing, the pressure gauge can ensure safety, the first throttle valve of the foaming agent storage tank can adjust the flow rate to ensure appropriate ratio, the filtration mechanism of the fracturing fluid storage tank can achieve multi-stage filtration to remove impurities, the second throttle valve can adjust the flow rate to ensure accurate ratio and improve purity, the three cylinders of the nitrogen cylinder group ensure gas supply, the diversion and summing pipe provides stable delivery, the shut-off valve B can control the on / off state, the pressure reducing valve can prevent equipment damage, the third throttle valve adjusts the flow rate to ensure ratio, helps form high-quality foam, and ensures safety.

[0011] To achieve efficient agitation of the materials in the mixing drum by driving the stirring shaft and stirring rod with the drive motor in the stirring mechanism, ensuring full mixing of all components, the shut-off valve A can flexibly control the timing of the discharge of the mixed liquid, while the pressure gauge can monitor the discharge pressure.

[0012] The stirring mechanism is further configured such that: the stirring mechanism includes a drive motor, the output end of the drive motor is connected to a stirring shaft, a plurality of stirring rods are sleeved on the outer wall of the stirring shaft, the tail ends of the plurality of stirring rods are provided with scrapers, and the outer wall of the drain pipe is provided with a shut-off valve A and a pressure gauge from top to bottom.

[0013] By adopting the above technical solution, the stirring mechanism drives the stirring shaft and stirring rod to rotate through the drive motor, which can efficiently stir the materials in the mixing drum and ensure that the components are fully mixed. The scraper can scrape off the materials attached to the inner wall of the mixing drum, reducing waste and avoiding residues that may affect the subsequent mixing effect. The shut-off valve A on the drain pipe can flexibly control the timing of the discharge of the mixed liquid, and the pressure gauge can monitor the discharge pressure, making it easy for operators to grasp the discharge status and ensuring the stability and safety of the discharge process.

[0014] To ensure a stable delivery channel through the first connecting pipe at the bottom of the foaming agent storage tank, the first throttle valve on its outer wall precisely regulates the delivery flow rate of the foaming agent, ensuring an appropriate ratio of foaming agent to other components:

[0015] The following configuration is further provided: a first connecting pipe is provided at the bottom of the foaming agent storage tank, a first throttle valve is provided on the outer wall of the first connecting pipe, and the tail end of the first connecting pipe extends laterally through one side of the top of the mixing cylinder.

[0016] By adopting the above technical solution, the first connecting pipe at the bottom of the foaming agent storage tank provides a stable delivery channel for the foaming agent, and the first throttle valve on its outer wall can accurately adjust the delivery flow rate of the foaming agent. The amount of foaming agent added can be controlled according to the actual mixing requirements to ensure that the ratio of foaming agent to other components is appropriate, thereby improving the overall quality of the mixture.

[0017] To achieve stable delivery of fracturing fluid to the mixing cylinder via the second connecting pipe at the bottom of the fracturing fluid storage tank, the filter mechanism, including the filter box, filter screen, and fine filter plate, performs multi-stage filtration of the fracturing fluid to prevent impurities from affecting the mixing effect. The second throttle valve can adjust the delivery flow rate of the fracturing fluid to ensure accurate proportions.

[0018] The fracturing fluid storage tank is further configured such that: a second connecting pipe is provided at the bottom end of the fracturing fluid storage tank; a filter mechanism and a second throttle valve are provided sequentially from top to bottom on the outer wall of the second connecting pipe; the tail end of the second connecting pipe extends laterally through the top of the mixing cylinder on the other side; the filter mechanism includes a filter box; and a filter screen plate and a fine filter plate are slidably connected sequentially from top to bottom on the inner walls of the left and right sides of the filter box.

[0019] By adopting the above technical solution, the second connecting pipe at the bottom of the fracturing fluid storage tank achieves stable delivery of fracturing fluid to the mixing cylinder. The filter box, filter screen and fine filter plate in the filtration mechanism can perform multi-stage filtration of the fracturing fluid, effectively removing impurities and particles, and preventing impurities from entering the mixing cylinder and clogging the equipment or affecting the mixing effect. The second throttle valve on the second connecting pipe can adjust the delivery flow rate of the fracturing fluid, ensuring the accurate mixing ratio of fracturing fluid with foaming agent and nitrogen, and improving the purity of the mixture.

[0020] To ensure a sufficient nitrogen reserve through the three cylinders of the nitrogen cylinder group and guarantee a continuous nitrogen supply, the diversion and manifold ensures the stability of nitrogen delivery, the shut-off valve B can quickly control the on / off of nitrogen delivery, the pressure reducing valve can regulate the nitrogen pressure to a suitable range to prevent high pressure damage to the equipment, and the third throttle valve can precisely control the nitrogen delivery flow rate.

[0021] The nitrogen cylinder assembly is further configured as follows: the nitrogen cylinder group is divided into three cylinders, and the bottom of the three cylinders is provided with a diversion and collection pipe. The lower section of the outer wall of the diversion and collection pipe is provided with a shut-off valve B, a pressure reducing valve and a third throttle valve from top to bottom.

[0022] By adopting the above technical solution, the three cylinders of the nitrogen cylinder group can provide sufficient nitrogen reserves to ensure a continuous supply of nitrogen during the mixing process. The diversion and summing pipe can centrally transport the nitrogen from the three cylinders to the mixing cylinder, ensuring the stability of nitrogen delivery. The shut-off valve B can quickly control the on / off of nitrogen delivery, the pressure reducing valve can adjust the nitrogen pressure to a suitable range to avoid high pressure damage to the equipment, and the third throttle valve can accurately control the nitrogen delivery flow rate to ensure a reasonable mixing ratio of nitrogen with other components, which is conducive to the stable formation of high-quality nitrogen foam, while ensuring the safety and reliability of the nitrogen delivery process.

[0023] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the stirring mechanism of this utility model;

[0026] Figure 3 This is a schematic diagram of the filtration mechanism of this utility model;

[0027] Figure 4 This is a schematic diagram of the nitrogen cylinder assembly of this utility model;

[0028] Figure 5 This is a schematic diagram of the electrical process of this utility model.

[0029] In the diagram: 1. Stirring mechanism; 101. Drive motor; 102. Stirring shaft; 103. Stirring rod; 104. Scraper; 2. Mixing cylinder; 3. Foaming agent storage tank; 301. First connecting pipe; 302. First throttle valve; 4. Fracturing fluid storage tank; 401. Second connecting pipe; 402. Second throttle valve; 5. Nitrogen cylinder group; 501. Cylinder body; 502. Diverting and converging pipe; 503. Shut-off valve B; 504. Pressure reducing valve; 505. Third throttle valve; 6. Filtration mechanism; 601. Filter box; 602. Filter screen; 603. Fine filter plate; 7. Drain pipe; 701. Shut-off valve A; 702. Pressure gauge. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0031] Please see Figures 1 to 5 A mixing device for nitrogen foam fracturing includes a stirring mechanism 1, the bottom end of which is vertically inserted through the middle of the top of a mixing cylinder 2, and a foaming agent storage tank 3 is transversely inserted through one side of the top of the mixing cylinder 2.

[0032] A fracturing fluid storage tank 4 runs horizontally through the other side of the top of the mixing cylinder 2;

[0033] A nitrogen cylinder group 5 is horizontally inserted through the rear side of the top of the mixing cylinder 2;

[0034] The bottom of the fracturing fluid storage tank 4 is equipped with a filter mechanism 6;

[0035] The bottom end of the mixing cylinder 2 is equipped with a drain pipe 7.

[0036] In this embodiment, as Figure 1 and Figure 2 and Figure 5 As shown, the stirring mechanism 1 includes a drive motor 101, the output end of the drive motor 101 is connected to a stirring shaft 102, a plurality of stirring rods 103 are sleeved on the outer wall of the stirring shaft 102, and a scraper 104 is provided at the tail end of the plurality of stirring rods 103. The outer wall of the drain pipe 7 is provided with a shut-off valve A701 and a pressure gauge 702 from top to bottom.

[0037] In this embodiment, as Figure 1 and Figure 3As shown, the bottom end of the foaming agent storage tank 3 is provided with a first connecting pipe 301, the outer wall of the first connecting pipe 301 is provided with a first throttle valve 302, and the tail end of the first connecting pipe 301 extends laterally through one side of the top of the mixing cylinder 2.

[0038] In this embodiment, as Figure 1 and Figure 3 As shown, the bottom end of the fracturing fluid storage tank 4 is provided with a second connecting pipe 401. The outer wall of the second connecting pipe 401 is provided with a filter mechanism 6 and a second throttle valve 402 from top to bottom. The tail end of the second connecting pipe 401 extends laterally through the top of the mixing cylinder 2 on the other side. The filter mechanism 6 includes a filter box 601. The inner walls of the left and right sides of the filter box 601 are slidably connected with a filter screen plate 602 and a fine filter plate 603 from top to bottom.

[0039] In this embodiment, as Figure 1 and Figure 4 As shown, the nitrogen cylinder group 5 is divided into three cylinders 501. The bottom of the three cylinders 501 is provided with a diversion and collection pipe 502. The lower section of the outer wall of the diversion and collection pipe 502 is provided with a shut-off valve B503, a pressure reducing valve 504 and a third throttle valve 505 from top to bottom.

[0040] The computer software involved in the hardware carriers such as the drive motor in the technical solution is software technology known to those skilled in the art. It is merely applied to the aforementioned hardware carriers. In other words, the computer software portion of the technical solution is an essential technical feature for solving the aforementioned technical problem, constituting a necessary technical feature for the technical problem solved by this application, but it is not a differentiating technical feature or a point of technical improvement. The applicant has not made any technical improvements to the computer software portion involved in the aforementioned related hardware carriers, nor is it a key technical point of the invention.

[0041] Therefore, the "drive motor", "pressure gauge", etc. involved in this application are physical functional modules that combine computer software programs or protocols in the prior art with the hardware carrier of this application. The computer software programs involved in these physical functional modules are all technologies known to those skilled in the art and are not improvements of this application. The improvement of this application should be the interaction relationship between the various physical functional modules, that is, the improvement of the overall structure of the hybrid device of this application, so as to solve the corresponding technical problems to be solved by this application.

[0042] The working process of this nitrogen foam fracturing mixing device is as follows:

[0043] First, the operator can open the first throttle valve 302 on the outer wall of the first connecting pipe 301, so that the foaming agent inside the foaming agent storage tank 3 can be transported to the mixing cylinder 2 through the first connecting pipe 301. At the same time, the operator can open the second throttle valve 402 on the outer wall of the second connecting pipe 401, so that the fracturing fluid inside the fracturing fluid storage tank 4 can enter the filtration mechanism 6 through the second connecting pipe 401. During this period, the fracturing fluid will first pass through the multi-stage filtration of the filter screen plate 602 and the fine filter plate 603 in the filter box 601, and then be transported to the mixing cylinder 2 through the second connecting pipe 401 in the lower section.

[0044] Subsequently, the operator can sequentially open the shut-off valve B503, pressure reducing valve 504 and third throttle valve 505 on the outer wall of the diversion and summing pipe 502 at the bottom of the three bottles 501, so that the nitrogen inside the three bottles 501 can be collected by the diversion and summing pipe 502 and then transported to the mixing cylinder 2.

[0045] Next, the operator can start the drive motor 101 (model: YJ265E) of the stirring mechanism 1 through the external controller (model: S7), so that its output end drives the inserted stirring shaft 102 to rotate. At this time, several stirring rods 103 sleeved on the outer wall of the stirring shaft 102 will rotate with it and stir the foaming agent, the filtered fracturing fluid and nitrogen in the mixing cylinder 2. Meanwhile, the scraper 104 located at the tail end of the stirring rod 103 will scrape the inner wall of the mixing cylinder 2 at the same time to prevent the material from adhering to the inner wall and affecting the mixing effect.

[0046] After the materials in the mixing cylinder 2 are fully mixed, the operator can open the shut-off valve A701 on the outer wall of the drain pipe 7 to allow the mixed nitrogen foam fracturing fluid to be discharged through the drain pipe 7. At the same time, during the discharge process, the operator can monitor the discharge pressure through the pressure gauge 702 (model: YTXN-150) on the outer wall of the drain pipe 7.

[0047] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0048] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A mixing device for nitrogen foam fracturing, comprising a stirring mechanism (1), characterized in that: The bottom end of the stirring mechanism (1) is vertically inserted through the middle of the top of the mixing cylinder (2), and a foaming agent storage tank (3) is horizontally inserted through one side of the top of the mixing cylinder (2). The top of the mixing cylinder (2) is transversely penetrated by a fracturing fluid storage tank (4); A nitrogen cylinder group (5) is transversely penetrating the rear side of the top of the mixing cylinder (2); The bottom end of the fracturing fluid storage tank (4) is equipped with a filter mechanism (6); The bottom end of the mixing cylinder (2) is provided with a drain pipe (7).

2. A mixing device for use in nitrogen foam fracturing according to claim 1, characterized in that: The stirring mechanism (1) includes a drive motor (101), the output end of which is connected to a stirring shaft (102), and a plurality of stirring rods (103) are sleeved on the outer wall of the stirring shaft (102). The tail ends of the plurality of stirring rods (103) are provided with scrapers (104), and the outer wall of the drain pipe (7) is provided with a shut-off valve A (701) and a pressure gauge (702) from top to bottom.

3. A mixing device for use in nitrogen foam fracturing according to claim 1, characterized in that: The bottom end of the foaming agent storage tank (3) is provided with a first connecting pipe (301), the outer wall of the first connecting pipe (301) is provided with a first throttle valve (302), and the tail end of the first connecting pipe (301) extends laterally through one side of the top of the mixing cylinder (2).

4. A mixing device for use in nitrogen foam fracturing according to claim 1, characterized in that: The bottom end of the fracturing fluid storage tank (4) is provided with a second connecting pipe (401). The outer wall of the second connecting pipe (401) is provided with a filter mechanism (6) and a second throttle valve (402) from top to bottom. The tail end of the second connecting pipe (401) extends laterally through the top of the mixing cylinder (2) on the other side. The filter mechanism (6) includes a filter box (601). The inner walls of the left and right sides of the filter box (601) are slidably connected with a filter screen plate (602) and a fine filter plate (603) from top to bottom.

5. A mixing device for use in nitrogen foam fracturing according to claim 1, characterized in that: The nitrogen cylinder group (5) is divided into three cylinders (501). The bottom of the three cylinders (501) is provided with a diversion and collection pipe (502). The lower section of the outer wall of the diversion and collection pipe (502) is provided with a shut-off valve B (503), a pressure reducing valve (504) and a third throttle valve (505) from top to bottom.

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