Dry powder solid-liquid mixing jet and method
Patent Information
- Application Number
- CN202611388646.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-08
- Publication Date
- 2026-11-03
AI Technical Summary
In existing technologies for oil and gas well fracturing operations, the mixing of dry powder and liquid has problems such as powder agglomeration, dust, uneven mixing, and high bubble content, resulting in a poor on-site environment and high equipment energy consumption.
A swirling dry powder solid-liquid mixing jet is adopted. Through the design of negative pressure powder suction and spiral liquid guide plate, the dry powder is continuously mixed in a closed manner. The initial mixing under negative pressure and the secondary mixing in the cavity are used to enhance shearing. Combined with the exhaust hole to remove gas, the mixing uniformity and airtightness are ensured.
It achieves closed and continuous mixing of dry powder, eliminates powder agglomeration and air bubbles, improves mixing uniformity, reduces equipment footprint and energy consumption, and improves the on-site environment.
Smart Images
Figure CN123024470A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of oil field dry powder mixing, in particular to a cyclone type dry powder solid-liquid mixing jet device and method. BACKGROUND
[0002] In the fracturing operation of oil and gas wells, especially in the large-scale development of unconventional oil and gas such as shale oil and shale gas, the oil field dry powder mixing technology is used to quickly prepare fracturing fluid on site. When preparing on site, various types of powder materials for fracturing are often quickly mixed and dissolved with water online, and the conventional solid-liquid mixing process mainly includes three types of schemes: open dispersion, positive pressure conveying dispersion and negative pressure simple jet dispersion. 1. Open dispersion scheme: the powder is directly poured into the liquid phase, the material is easy to clump and float on the liquid surface, a large amount of "fish eyes" (dry powder agglomerates) are formed, the dissolution and dispersion are uneven, dust flies, the site environment is poor, manual intervention is required, and it is not suitable for continuous and closed production. 2. Positive pressure dispersion scheme: the dry powder is pressed into the liquid phase by pressure, the powder is easy to bridge and block the pipe, the powder feeding flow fluctuates greatly, the solid-liquid ratio is unstable, and the local dry powder agglomeration cannot be dispersed. 3. Traditional negative pressure jet scheme: the powder is sucked by jet negative pressure, although the closed material suction is achieved, only the initial impact mixing is completed, the gas-liquid-powder three phases are wrapped with a large amount of air bubbles, the powder mixing path is short, the shearing and dispersion capacity is insufficient, and the problems of fish eyes, uneven mixing and a large amount of air bubbles in the finished product still exist, and a large-scale stirring tank needs to be additionally arranged for long-time stirring and defoaming, which has large equipment volume and high energy consumption. SUMMARY
[0003] The present application aims to solve the above-mentioned defects in the prior art, and provides a cyclone type dry powder solid-liquid mixing jet device and method, which realizes closed and continuous online rapid cyclone type solid-liquid mixing and dissolution, eliminates dry powder fish eye agglomeration, removes the air brought in during mixing, and improves the uniformity of dry powder mixing.
[0004] The cyclone type dry powder solid-liquid mixing jet device provided by the present application has the technical scheme that: a mixing liquid main pipe body is provided, and a jet device inlet water pipe, a jet device powder suction pipe, a mixing exhaust cylinder body, an exhaust hole, a mixing liquid outlet, a spiral liquid guide piece, a liquid guide spiral pipe, a jet device liquid inlet cover and a jet device are further provided; one end of the mixing liquid main pipe body is connected with the jet device, the inner cavity of the jet device is provided with the jet device powder suction pipe, the jet device liquid inlet cover is arranged on the jet device, the jet device liquid inlet cover is connected with the jet device inlet water pipe at the inlet thereof, the other end of the mixing liquid main pipe body is connected with the liquid guide spiral pipe, and the liquid guide spiral pipe is arranged in the mixing exhaust cylinder body, and the spiral liquid guide piece is arranged in the mixing exhaust cylinder body; one end of the mixing exhaust cylinder body is provided with the exhaust hole, and the other end is provided with the mixing liquid outlet.
[0005] Preferably, the above-mentioned jet flow device comprises a jet flow device outer connector, a connecting flange, a jet flow device main body, a jet flow device reducing head, and a jet flow device water inlet hole, the middle part of the outer wall of the jet flow device main body is provided with a plurality of jet flow device water inlet holes, one end of the jet flow device main body is provided with a jet flow device reducing head for being inserted into the inner cavity of the mixed liquid main pipe body, the other end of the jet flow device main body is provided with a jet flow device outer connector, the outer end of the jet flow device outer connector is provided with a connecting flange, and a jet flow device powder suction pipe is arranged in the inner cavity of the jet flow device main body.
[0006] Preferably, the above-mentioned jet flow device powder suction pipe comprises a powder suction pipe cylinder and a conical outlet end, the powder suction pipe cylinder is in a cylindrical structure, the end of the powder suction pipe cylinder is provided with a conical outlet end, and the conical outlet end is arranged in the inner cavity of the jet flow device reducing head.
[0007] Preferably, a liquid passing channel is formed between the inner wall of the jet flow device main body and the jet flow device powder suction pipe, one side close to the connecting flange is a closed structure, one end close to the conical outlet end is an open structure, and the conical outlet end is located at the central position of the jet flow device reducing head.
[0008] Preferably, the inner diameter of the mixed exhaust cylinder is greater than the outer diameter of the mixed liquid main pipe body, a plurality of groups of spiral liquid guide pieces are arranged in the inner cavity of the mixed exhaust cylinder, and the outlet end of the liquid guide spiral pipe is located in the plurality of groups of spiral liquid guide pieces.
[0009] Preferably, the jet flow device liquid inlet cover is arranged outside the jet flow device water inlet hole, and the jet flow device liquid inlet cover is in an annular cylinder structure, and the inner diameter of the jet flow device liquid inlet cover is greater than the outer diameter of the jet flow device main body.
[0010] Preferably, the exhaust hole is located on the upper side of one end of the mixed exhaust cylinder, and the mixed liquid outlet is located on the lower side of the other end.
[0011] The method of the cyclone type dry powder solid-liquid mixing jet flow device mentioned in the application comprises the following processes: Firstly, the clear water enters the annular space between the jet flow device liquid inlet cover and the mixed liquid main pipe body through the jet flow device water inlet pipe, enters the liquid passing channel formed between the jet flow device powder suction pipe and the inner wall of the jet flow device main body through the jet flow device water inlet hole, is sprayed out along the jet flow device reducing head and generates negative pressure, the dry powder is sucked into the negative pressure cavity formed between the jet flow device reducing head and the outer wall of the conical outlet end through the jet flow device powder suction pipe, the clear water and the dry powder complete the initial collision and shear preliminary mixing in the negative pressure cavity, and the dry powder is located in the center of the sprayed liquid flow, so that the problem of dry powder fish-eye aggregation is reduced, and the mixing is more uniform. Then, the mixed solid-liquid mixture enters the mixing exhaust cylinder through the mixing liquid main body for secondary mixing; the mixture is guided and rotated by the spiral liquid guide plate to achieve high-speed swirling, generating strong shear and turbulent disturbance, further tearing apart the dry powder agglomerates, completely breaking up the fish eyes, strengthening the micro-mixing of the solid and liquid phases, improving the uniformity of the dry powder mixing, and removing the air introduced during mixing, allowing the air to be discharged along the exhaust port. Finally, the uniform and stable solid-liquid mixture is output from the mixing liquid outlet, completing the entire closed online dry powder mixing process.
[0012] The beneficial effects of this invention are: 1. The entire process of continuous online mixing is completely enclosed and dust-free. Dry powder is fed by negative pressure self-priming, with no open feeding, which prevents powder from flying and improves the working conditions on site. It can realize continuous feeding and continuous discharge, without the need to configure a large-capacity mixing and dissolving tank, thus reducing the footprint of the entire process equipment. 2. Eliminates fish-eye agglomeration and achieves high mixing uniformity. Unlike ordinary jets that only perform simple impact mixing, it adopts "negative pressure initial mixing and secondary mixing in the cavity plus spiral swirling strong shearing" to achieve multi-stage mixing. The spiral liquid guide blades can create high-intensity swirling turbulence, which continuously shears and breaks up agglomerated dry powder particles, effectively breaking up dry powder clumps and reducing fish-eye defects from the root. The solid-liquid mixing uniformity is significantly better than that of traditional negative pressure jet equipment. 3. Equipped with a self-venting structure to reduce the gas content of the finished product. When dry powder is sucked in, it carries a large amount of air into the liquid phase. In ordinary mixing devices, air bubbles will remain in the mixture, affecting the quality of subsequent products. This device is equipped with an independent venting port to achieve gas-liquid separation in the mixing chamber, promptly expelling the entrained air, reducing air bubbles in the mixture, and reducing the pressure of subsequent defoaming processes. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall shape of the invention; Figure 2 This is a schematic diagram of the external shape of the present invention from another angle; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is an enlarged schematic diagram of the jet section of the present invention; Figure 5 This is an enlarged three-dimensional schematic diagram of the jet section of the present invention; Figure 6 This is an enlarged schematic diagram of the mixed exhaust cylinder section; Figure 7 This is a schematic diagram of the jet ejector powder suction pipe installed in the jet ejector; Figure 8 This is a half-sectional schematic diagram of the powder suction pipe of the ejector installed in the ejector; Figure 9 This is a half-sectional schematic diagram of the powder suction pipe of the jet injector; In the diagram above: 1. Ejector inlet pipe; 2. Ejector powder suction pipe; 3. Mixed liquid main body; 4. Mixed liquid exhaust cylinder; 5. Exhaust port; 6. Mixed liquid outlet; 7. Spiral guide plate; 8. Guide spiral pipe; 9. Ejector inlet hood; 10. Ejector; 2.1. Powder suction pipe cylinder; 2.2. Conical outlet end; 2.3. Powder suction pipe flange joint; 10.1. Ejector external joint; 10.2. Connecting flange; 10.3. Ejector body; 10.4. Ejector reducing head; 10.5. Ejector inlet hole. Detailed Implementation
[0014] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0015] Example 1, referring to Figures 1-9 The present invention discloses a vortex-type dry powder solid-liquid mixing jet ejector, comprising a main mixing liquid body 3, an ejector inlet pipe 1, an ejector powder suction pipe 2, a mixing exhaust cylinder 4, an exhaust port 5, a mixed liquid outlet 6, a spiral liquid guide plate 7, a liquid guide spiral tube 8, an ejector inlet cover 9, and an ejector 10. One end of the main mixing liquid body 3 is connected to the ejector 10, the ejector powder suction pipe 2 is installed in the inner cavity of the ejector 10, the ejector inlet cover 9 is installed on the ejector 10, and the inlet of the ejector inlet cover 9 is connected to the ejector inlet pipe 1. The other end of the main mixing liquid body 3 is connected to the liquid guide spiral tube 8, and the liquid guide spiral tube 8 is located inside the mixing exhaust cylinder 4. The spiral liquid guide plate 7 is provided inside the mixing exhaust cylinder 4. One end of the mixing exhaust cylinder 4 is provided with an exhaust port 5, and the other end is provided with a mixed liquid outlet 6.
[0016] Reference Figures 7-8 The ejector 10 mentioned in this invention includes an ejector external connector 10.1, a connecting flange 10.2, an ejector body 10.3, an ejector reducing head 10.4, and an ejector water inlet 10.5. The outer wall of the middle part of the ejector body 10.3 is provided with a plurality of ejector water inlets 10.5. An ejector reducing head 10.4 is provided at one end of the ejector body 10.3 for insertion into the inner cavity of the mixing liquid main body 3. The ejector external connector 10.1 is installed at the other end of the ejector body 10.1. The outer end of the ejector external connector 10.1 is provided with a connecting flange 10.2. An ejector powder suction pipe 2 is installed in the inner cavity of the ejector body 10.3.
[0017] Reference Figure 9 The jet ejector suction pipe 2 mentioned in this invention includes a suction pipe body 2.1 and a conical outlet end 2.2. The suction pipe body 2.1 is a cylindrical structure, and a conical outlet end 2.2 is provided at the end of the suction pipe body 2.1. The conical outlet end 2.2 is installed in the inner cavity of the jet ejector variable diameter head 10.4.
[0018] The aforementioned jet pump suction pipe 2 forms a liquid passage between the jet pump body 10.3 and the inner wall of the jet pump body 10.3. The side near the connecting flange 10.2 is a closed structure, while the side near the conical outlet end 2.2 is an open structure. The conical outlet end 2.2 is located at the center of the jet pump reducer head 10.4.
[0019] Reference Figure 6 The inner diameter of the mixing exhaust cylinder 4 mentioned in this invention is larger than the outer diameter of the mixing liquid main body 3. Multiple sets of spiral liquid guiding plates 7 are provided in the inner cavity of the mixing exhaust cylinder 4, and the outlet end of the liquid guiding spiral tube 8 is located inside the multiple sets of spiral liquid guiding plates 7.
[0020] The aforementioned jet injector inlet shroud 9 is installed on the outside of the jet injector inlet hole 10.5, and the jet injector inlet shroud 9 has an annular cylindrical structure, with the inner diameter of the jet injector inlet shroud 9 being larger than the outer diameter of the jet injector body 10.3.
[0021] The aforementioned exhaust port 5 is located on the upper side of one end of the mixing exhaust cylinder 4, and the liquid outlet 6 is located on the lower side of the other end.
[0022] The method for the swirl-type dry powder solid-liquid mixing jet mentioned in this invention includes the following steps: First, clean water enters the annulus between the jet injector inlet hood 9 and the main mixing liquid body 3 through the jet injector inlet pipe 1. It then enters the jet injector powder suction pipe 2 through the jet injector inlet hole 10.5, forming a liquid passage between the inner wall of the jet injector body 10.3 and the powder suction pipe 2. The water is then sprayed out along the jet injector reducer head 10.4 and generates negative pressure, drawing the dry powder into the negative pressure cavity formed between the jet injector reducer head 10.4 and the outer wall of the conical outlet end 2.2 through the jet injector powder suction pipe 2. The clean water and dry powder undergo initial collision and shearing mixing in the negative pressure cavity, and the dry powder is located in the center of the sprayed liquid flow, reducing the problem of dry powder agglomeration and making the mixing more uniform. Then, the mixed solid-liquid mixture enters the mixing exhaust cylinder 4 through the mixing liquid main body 3 for secondary mixing; the mixed liquid is guided and rotated by the spiral liquid guide plate 7 to achieve high-speed swirling, generating strong shear and turbulent disturbance, further tearing apart the dry powder agglomerates, completely breaking up the fish eyes, strengthening the micro-mixing of the solid and liquid phases, improving the uniformity of the dry powder mixing, and removing the air introduced during mixing, allowing the air to be discharged along the exhaust port 5. Finally, the uniform and stable solid-liquid mixture is output from the mixed liquid outlet 6, completing the entire closed online dry powder mixing process.
[0023] Example 2, refer to Figures 1-9The present invention discloses a vortex-type dry powder solid-liquid mixing jet ejector, comprising a main mixing liquid body 3, an ejector inlet pipe 1, an ejector powder suction pipe 2, a mixing exhaust cylinder 4, an exhaust port 5, a mixed liquid outlet 6, a spiral liquid guide plate 7, a liquid guide spiral tube 8, an ejector inlet cover 9, and an ejector 10. One end of the main mixing liquid body 3 is connected to the ejector 10, the ejector powder suction pipe 2 is installed in the inner cavity of the ejector 10, the ejector inlet cover 9 is installed on the ejector 10, and the inlet of the ejector inlet cover 9 is connected to the ejector inlet pipe 1. The other end of the main mixing liquid body 3 is connected to the liquid guide spiral tube 8, and the liquid guide spiral tube 8 is located inside the mixing exhaust cylinder 4. The spiral liquid guide plate 7 is provided inside the mixing exhaust cylinder 4. One end of the mixing exhaust cylinder 4 is provided with an exhaust port 5, and the other end is provided with a mixed liquid outlet 6.
[0024] The difference from Example 1 is: The jet ejector suction pipe 2 mentioned in this embodiment includes a suction pipe body 2.1, a conical outlet end 2.2, and a suction pipe flange joint 2.3. The suction pipe body 2.1 is a cylindrical structure. The suction pipe flange joint 2.3 is fixedly welded to the outer wall of the suction pipe body 2.1 for movable connection with the connecting flange 10.2 of the jet ejector 10, so that the jet ejector suction pipe 2 is located at the center of the jet ejector 10. A conical outlet end 2.2 is provided at the end of the suction pipe body 2.1, and the conical outlet end 2.2 is installed in the inner cavity of the jet ejector reducing head 10.4.
[0025] The above description is merely a preferred embodiment of the present invention. Any person skilled in the art can modify the present invention or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.
Claims
1. A swirling dry powder solid-liquid mixing jet device, comprising a mixing liquid main body (3), characterized in that: It also includes a jet inlet pipe (1), a jet powder suction pipe (2), a mixing exhaust cylinder (4), an exhaust hole (5), a mixed liquid outlet (6), a spiral guide plate (7), a guide spiral tube (8), a jet inlet cover (9), and a jet (10). One end of the mixing main body (3) is connected to the jet (10). The jet powder suction pipe (2) is installed in the inner cavity of the jet (10). The jet inlet cover (9) is installed on the jet (10). The jet inlet pipe (1) is connected to the jet inlet cover (9). The other end of the mixing main body (3) is connected to the guide spiral tube (8). The guide spiral tube (8) is located inside the mixing exhaust cylinder (4). A spiral guide plate (7) is provided inside the mixing exhaust cylinder (4). One end of the mixing exhaust cylinder (4) is provided with an exhaust hole (5), and the other end is provided with a mixed liquid outlet (6).
2. The swirling dry powder solid-liquid mixing jet ejector according to claim 1, characterized in that: The ejector (10) includes an ejector external connector (10.1), a connecting flange (10.2), an ejector body (10.3), an ejector reducing head (10.4), and an ejector inlet (10.5). The outer wall of the middle part of the ejector body (10.3) is provided with multiple ejector inlet holes (10.5). An ejector reducing head (10.4) is provided at one end of the ejector body (10.3) for insertion into the inner cavity of the mixing liquid main body (3). The ejector external connector (10.1) is installed at the other end of the ejector body (10.3). The outer end of the ejector external connector (10.1) is provided with a connecting flange (10.2). An ejector powder suction pipe (2) is installed in the inner cavity of the ejector body (10.3).
3. The swirling dry powder solid-liquid mixing jet ejector according to claim 2, characterized in that: The jet ejector suction pipe (2) includes a suction pipe body (2.1) and a conical outlet end (2.2). The suction pipe body (2.1) is a cylindrical structure. A conical outlet end (2.2) is provided at the end of the suction pipe body (2.1), and the conical outlet end (2.2) is installed in the inner cavity of the jet ejector reducer head (10.4).
4. The swirling dry powder solid-liquid mixing jet ejector according to claim 3, characterized in that: The powder suction pipe (2) of the jet injector forms a liquid passage between the inner wall of the jet injector body (10.3) and the side near the connecting flange (10.2) is a closed structure, while the side near the conical outlet end (2.2) is an open structure. The conical outlet end (2.2) is located at the center of the jet injector variable diameter head (10.4).
5. The swirling dry powder solid-liquid mixing jet ejector according to claim 4, characterized in that: The inner diameter of the mixing exhaust cylinder (4) is larger than the outer diameter of the mixing liquid main body (3). Multiple sets of spiral liquid guide plates (7) are provided in the inner cavity of the mixing exhaust cylinder (4), and the outlet end of the liquid guide spiral tube (8) is located inside the multiple sets of spiral liquid guide plates (7).
6. The swirling dry powder solid-liquid mixing jet ejector according to claim 5, characterized in that: The jet injector inlet shroud (9) is installed on the outside of the jet injector inlet hole (10.5), and the jet injector inlet shroud (9) is an annular cylindrical structure. The inner diameter of the jet injector inlet shroud (9) is larger than the outer diameter of the jet injector body (10.3).
7. The swirling dry powder solid-liquid mixing jet ejector according to claim 5, characterized in that: The exhaust port (5) is located on the upper side of one end of the mixing exhaust cylinder (4), and the liquid outlet (6) is located on the lower side of the other end.
8. A method using the swirling dry powder solid-liquid mixing jet generator according to any one of claims 1-7, characterized in that: The process includes the following: First, clean water enters the annulus between the jet injector liquid inlet hood (9) and the main body of the mixing liquid (3) through the jet injector inlet pipe (1). It then enters the jet injector powder suction pipe (2) and the inner wall of the jet injector body (10.3) through the jet injector inlet hole (10.5) to form a liquid passage. It is then sprayed out along the jet injector reducer head (10.4) and generates negative pressure, which draws the dry powder into the negative pressure cavity formed between the jet injector reducer head (10.4) and the outer wall of the conical outlet end (2.2) through the jet injector powder suction pipe (2). The clean water and dry powder undergo initial collision and shearing in the negative pressure cavity, and the dry powder is located in the center of the sprayed liquid flow, which reduces the problem of dry powder agglomeration and makes the mixing more uniform. Then, the mixed solid-liquid mixture enters the mixing exhaust cylinder (4) through the mixing liquid main body (3) for secondary mixing; the mixed liquid is guided to rotate by the spiral liquid guide plate (7) to achieve high-speed swirling, generating strong shear and turbulent disturbance, further tearing the dry powder agglomerates, completely breaking up the fish eyes, strengthening the micro-mixing of the solid and liquid phases, improving the uniformity of the dry powder mixing, and removing the air brought in by the mixing, so that the air is discharged along the exhaust hole (5), and finally the uniform and stable solid-liquid mixture is output from the mixed liquid outlet (6) to complete the entire closed online dry powder mixing process.