Weighted fracturing fluid production stirring device

Abstract

The weighted fracturing fluid production stirring device comprises a tank body, a driving motor is arranged on the upper side of the tank; a planetary gear box is arranged at the top in the tank body; an output shaft of the driving motor penetrates through the tank body to drive the planetary gearbox; the planetary gearbox comprises a driving gear which is arranged in the center of the planetary gearbox and is driven by a driving motor; a plurality of transmission gears are arranged on the outer side of the driving gear; the transmission gear is in meshed connection with the driving gear; gear rings are rotationally arranged on the outer sides of the transmission gears; the plurality of transmission gears are in meshed connection with the gear ring; the driving gear extends into the tank body and is provided with a first spiral stirring blade; and two sides of the gear ring extend downwards and are oppositely provided with second spiral stirring blades. The rotating directions of the first spiral stirring blade and the second spiral stirring blade are opposite, so that a solution in the center of the tank body and a solution in the inner wall of the tank body form flowing circulation in opposite directions in the stirring process, the whole solution is pushed to be mixed and stirred, and the mixing efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of fracturing fluid production devices, in particular to a weighted fracturing fluid production stirring device. Background Art

[0002] In the process of oil extraction, fracturing fluid is usually injected into the oil and gas layer to transfer the high pressure formed by the ground equipment to the formation, causing the formation to break and form cracks and transport proppant along the cracks. Before injecting the fracturing fluid, a certain amount of sand needs to be mixed into the fracturing fluid to increase the pressure of the fracturing fluid. In some high-pressure wells, the commonly used sand-mixed fracturing fluid has insufficient density and is difficult to provide the required pressure. Usually, additives such as sodium chloride and calcium bromide are added to the sand-mixed fracturing fluid to increase the density of the fracturing fluid, which is usually called weighted fracturing fluid.

[0003] During the mixing process of weighted fracturing fluid, the sand particles and additives such as sodium chloride and calcium bromide are mostly granular or powdered preparations, and the fracturing fluid itself is a liquid with a certain viscosity. The stirring and mixing time is relatively long. The commonly used single-leaf and double-leaf stirring devices are difficult to fully stir the more viscous liquid. Sand particles often clump and adhere to the bottom of the stirring device and cannot be fully mixed. In addition, the viscosity of the mixed weighted fracturing fluid is relatively high, and the time to discharge from the stirring device is relatively long, which affects the overall production efficiency. Utility Model Content

[0004] The utility model aims to provide a weighted fracturing fluid production stirring device to solve the technical problems that in the process of mixing and producing the weighted fracturing fluid, the sand particles and additives such as sodium chloride and calcium bromide mixed in are mostly in granular or powdered preparations, and the fracturing fluid itself is a liquid with a certain viscosity, the stirring and mixing time is relatively long, the commonly used single-leaf and double-leaf stirring devices are difficult to fully stir the relatively viscous liquid, and the sand particles often clump and adhere to the bottom of the stirring device and cannot be fully mixed, and the viscosity of the mixed weighted fracturing fluid is relatively high, and the time to discharge the stirring device is relatively long, which affects the overall production efficiency.

[0005] In order to achieve the above-mentioned purpose, the specific technical scheme of the utility model of a weighted fracturing fluid production stirring device is as follows:

[0006] A weighted fracturing fluid production stirring device comprises a tank body; a driving motor is arranged on the upper side of the tank body; a planetary gear box is arranged on the top of the tank body; the output shaft of the driving motor passes through the tank body to drive the planetary gear box; the planetary gear box comprises a driving gear arranged at the center thereof and driven by the driving motor; a plurality of transmission gears are arranged on the outside of the driving gear; the transmission gear and the driving gear are meshedly connected; a gear ring is rotatably arranged on the outside of the plurality of transmission gears; the plurality of transmission gears and the gear ring are meshedly connected; a first spiral stirring blade is extended into the tank body by the driving gear; second spiral stirring blades are extended downwardly and relatively arranged on both sides of the gear ring; a discharge port is arranged at the center of the bottom of the tank body; a feed pipe is arranged on one side of the upper part of the tank body.

[0007] Furthermore, the first spiral stirring blade and the second spiral stirring blade have the same spiral rotation direction.

[0008] Furthermore, a plurality of holes are provided on the first spiral stirring blade and the second spiral stirring blade.

[0009] Furthermore, a plurality of the transmission gears are provided with crushing and stirring blades extending downward.

[0010] Furthermore, the plurality of crushing and stirring blades are arranged at different levels in the tank body.

[0011] The utility model discloses a weighted fracturing fluid production stirring device with the following advantages: a planetary gear box driven by a driving motor is arranged in a tank body, a first spiral stirring blade is arranged through a driving gear in the planetary gear box, and a second spiral stirring blade is arranged through a gear ring, and the first spiral stirring blade and the second spiral stirring blade are used to stir and mix the weighted fracturing fluid solution in the tank body. Compared with commonly used stirring blades, the stirring range of the device is larger and the stirring efficiency is higher, which can prevent sand particles from agglomerating and being difficult to mix; the spiral directions of the first spiral stirring blade and the second spiral stirring blade are arranged to be the same, and after being driven by the planetary gear box, the rotation directions of the first spiral stirring blade and the second spiral stirring blade are opposite, so that the solution in the center of the tank body and the solution at the inner wall of the tank body form a flow circulation in opposite directions during the stirring process, so as to promote the mixing and stirring of the overall solution, increase the mixing efficiency, and prevent the situation that some viscous solution or sand particles agglomerate and adhere to the bottom of the tank body and are difficult to be stirred and mixed; The spiral stirring blade and the second spiral stirring blade are provided with a plurality of holes, which increase the contact area between the first spiral stirring blade and the second spiral stirring blade and the solution. During the stirring, the contact between the holes and the liquid will form a strong turbulence, break up the sand agglomeration, and increase the mixing effect. For the stirring of the more viscous weighted fracturing fluid, the holes can reduce the resistance encountered by the first spiral stirring blade and the second spiral stirring blade during the stirring process, thereby increasing the service life. By providing crushing stirring blades of different levels under the multiple transmission gears, the crushing effect on the sand agglomeration is increased, and a plurality of complex turbulences are formed at the same time, which accelerates the flow rate of sand and additives such as sodium chloride and calcium bromide in the tank body, further improving the mixing efficiency and reducing the stirring time. After the mixing of the weighted fracturing fluid is completed, the finished product is discharged through the discharge port. During the discharge process of the more viscous weighted fracturing fluid, the drive motor is started, and the rotation of the spiral first spiral stirring blade opposite to the discharge port can give the weighted fracturing fluid a downward thrust, thereby increasing the discharge speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic cross-sectional view of the internal structure of the tank body of the utility model;

[0014] Figure 3 This is a schematic diagram of the cross-sectional structure of the planetary gearbox in the tank of the utility model;

[0015] Figure 4 For this utility model Figure 3 A magnified schematic diagram of the middle A area;

[0016] Explanation of the markings in the figure: 1. Tank body; 2. Driving motor; 3. Planetary gear box; 4. Driving gear; 5. Transmission gear; 6. Gear ring; 7. First spiral stirring blade; 8. Second spiral stirring blade; 9. Discharge port; 10. Feed pipe; 11. Hole; 12. Crushing stirring blade. DETAILED DESCRIPTION

[0017] In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of a weighted fracturing fluid production stirring device of the utility model in conjunction with the accompanying drawings.

[0018] like Figure 1-4 As shown, the utility model is a weighted fracturing fluid production stirring device, comprising a tank body 1; a driving motor 2 is arranged on the upper side of the tank body 1; a planetary gear box 3 is arranged on the top of the tank body 1; the output shaft of the driving motor 2 passes through the tank body 1 to drive the planetary gear box 3; the planetary gear box 3 includes a driving gear 4 driven by the driving motor 2 arranged at its center; a plurality of transmission gears 5 are arranged on the outside of the driving gear 4; the transmission gear 5 and the driving gear 4 are meshedly connected; a gear ring 6 is rotatably arranged on the outside of the plurality of transmission gears 5; the plurality of transmission gears 5 and the gear ring 6 are meshedly connected; a first spiral stirring blade 7 is extended into the tank body 1 by the driving gear 4; second spiral stirring blades 8 are extended downward and relatively arranged on both sides of the gear ring 6; a discharge port 9 is arranged at the center of the bottom of the tank body 1; a feed pipe 10 is arranged on one side of the upper part of the tank body 1.

[0019] Combination Figure 1-4 As shown, during use, fracturing fluid, sand particles, and additives such as sodium chloride and calcium bromide are introduced into the tank body 1 through the feed pipe 10, and the drive motor 2 is started. The drive motor 2 drives the planetary gear box 3 to rotate to stir and mix the solution in the tank body 1. The first spiral stirring blade 7 arranged in the middle of the tank body 1 and the second spiral stirring blade 8 arranged on the inner wall of the tank body 1 have a larger stirring range and a higher stirring efficiency, which can prevent sand particles from clumping and adhering to the bottom or side wall of the tank body 1 and making it difficult to mix.

[0020] The spiral rotation direction of the first spiral stirring blade 7 is the same as that of the second spiral stirring blade 8. By setting the spiral directions of the first spiral stirring blade 7 and the second spiral stirring blade 8 to be the same, after being transmitted by the driving gear 4 and the transmission gear 5 of the planetary gear box 3, the rotation directions of the first spiral stirring blade 7 and the second spiral stirring blade 8 are opposite. During the stirring process, the solution at the center of the tank body 1 and the solution at the inner wall of the tank body 1 form a flow circulation in opposite directions, so as to promote the mixing and stirring of the overall solution, increase the mixing efficiency, and prevent some viscous solutions or sand particles from clumping and adhering to the bottom of the tank body 1 and being difficult to be stirred and mixed.

[0021] A plurality of holes 11 are provided on the first spiral stirring blade 7 and the second spiral stirring blade 8. By providing a plurality of holes 11 on the first spiral stirring blade 7 and the second spiral stirring blade 8, the contact area between the first spiral stirring blade 7 and the second spiral stirring blade 8 and the solution is increased. During stirring, the contact between the holes 11 and the liquid will form a strong turbulence, break up the agglomeration of sand particles, and increase the mixing effect. For the stirring of more viscous weighted fracturing fluid, the holes 11 can reduce the resistance encountered by the first spiral stirring blade 7 and the second spiral stirring blade 8 during the stirring process, thereby increasing the service life.

[0022] A plurality of transmission gears 5 are downwardly extended with crushing and stirring blades 12, and the plurality of crushing and stirring blades 12 are arranged at different levels in the tank body 1. By arranging the crushing and stirring blades 12 at different levels under the plurality of transmission gears 5, the crushing effect on the agglomeration of sand particles is increased, and a plurality of complex turbulences are formed at the same time, thereby accelerating the flow speed of sand particles and additives such as sodium chloride and calcium bromide in the tank body 1, further improving the mixing efficiency, and reducing the stirring time.

[0023] After the weighted fracturing fluid is mixed, the finished product is discharged through the discharge port 9. During the discharge process of the more viscous weighted fracturing fluid, the drive motor 2 is started to drive the spiral first spiral stirring blade 7 opposite to the discharge port 9 to rotate in the appropriate direction, giving the weighted fracturing fluid a downward thrust, increasing the discharge speed of the finished weighted fracturing fluid, and increasing the overall production efficiency.

[0024] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A weighted fracturing fluid production stirring device, characterized in that: The invention comprises a tank body (1); a driving motor (2) is arranged on the upper side of the tank body (1); a planetary gear box (3) is arranged on the top of the tank body (1); the output shaft of the driving motor (2) passes through the tank body (1) to drive the planetary gear box (3); the planetary gear box (3) comprises a driving gear (4) arranged at the center thereof and driven by the driving motor (2); a plurality of transmission gears (5) are arranged on the outside of the driving gear (4); the transmission gear (5) and the driving gear (4) are meshedly connected; a gear ring (6) is rotatably arranged on the outside of the plurality of transmission gears (5); the plurality of transmission gears (5) and the gear ring (6) are meshedly connected; a first spiral stirring blade (7) is arranged on the driving gear (4) extending into the tank body (1); second spiral stirring blades (8) are arranged on both sides of the gear ring (6) extending downwards and opposite to each other; a discharge port (9) is arranged at the center of the bottom of the tank body (1); and a feed pipe (10) is arranged on one side of the upper part of the tank body (1).

2. A weighted fracturing fluid production stirring device according to claim 1, characterized in that: The first spiral stirring blade (7) and the second spiral stirring blade (8) have the same spiral rotation direction.

3. A weighted fracturing fluid production stirring device according to claim 1, characterized in that: The first spiral stirring blade (7) and the second spiral stirring blade (8) are provided with a plurality of holes (11).

4. A weighted fracturing fluid production stirring device according to claim 1, characterized in that: A plurality of the transmission gears (5) are provided with crushing and stirring blades (12) extending downward.

5. A weighted fracturing fluid production stirring device according to claim 4, characterized in that: The plurality of crushing and stirring blades (12) are arranged at different levels in the tank body (1).

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