Integrated high-efficiency jet stirring device

Abstract

The application discloses an integrated high-efficiency jet stirring device, which comprises an internally hollow stirring shaft, a liquid inlet pipe sealing top pipe cap connected to the upper end of the stirring shaft, a buffer type base fixed to the lower end of the stirring shaft, an impeller connected to the lower end of the stirring shaft, the impeller being arranged close to one end of the buffer type base, a jet guide pipe arranged on the stirring shaft, and a high-speed reduced-diameter nozzle connected to the jet guide pipe; the stirring shaft is driven to rotate by a rotating device connected to a stirrer; the liquid inlet pipe sealing top pipe cap is communicated with a liquid inlet pipe; an input Y-shaped joint is arranged on the liquid inlet pipe; the stirrer serves as a power device; drilling fluid flows through the liquid inlet pipe into the stirring shaft cavity through the Y-shaped joint. During the rotation of the impeller, the nozzle continuously washes and mixes the bottom of the cabin tank, increases the stirring, premixing and turbulence intensity, fully mixes the drilling fluid, and makes the tank body have no or little residual drilling fluid, thereby preventing the drilling fluid from being easily changed into solid and condensed on the tank wall or dead angle after stopping mixing, and causing the problem of being unable to clean.

Description

Technical Field

[0001] This invention belongs to the technical field of drilling fluid mixing devices for petroleum geological exploration drilling rigs, specifically relating to an integrated high-efficiency jet mixing device. Background Technology

[0002] In drilling fluid circulation systems, the drilling fluid in the tank needs to be continuously mixed and stirred to ensure that heavy powder and additives are fully mixed and in contact. Due to the huge volume of drilling fluid used, and considering factors such as manufacturing costs and capacity, rectangular drilling fluid tanks are currently the most commonly used. Due to the solid-liquid mixing characteristics of drilling fluid, a large amount of predominantly solid drilling fluid will gradually accumulate in the corners of the rectangular tank during stirring and use. Furthermore, due to the dead corners created by the stirring method and the reactive nature of the drilling fluid itself, the deposited drilling fluid in the corners will gradually harden and solidify in large quantities in the corners of the tank, accelerating localized corrosion of the tank. Moreover, cleaning the solidified tank is extremely difficult.

[0003] Because different drilling fluid systems are frequently required to be changed depending on the formation during drilling, the cleaning and emptying of the drilling tanks requires a significant amount of manpower and resources. This process extends the entire drilling process by an average of two to three weeks, increasing the total drilling cost. It also reduces the actual usable volume of the drilling tank, decreases the mixing quality, and causes excessive motor current during stirring, thus shortening the motor's lifespan. Furthermore, if the solids that settle at the bottom partially dissolve and break down, it increases wear on components such as the mud pump cylinder liner and suction end.

[0004] Currently, most drilling fluid cleaning devices are diesel or electric driven pressure cleaning units with vacuum suction functions. This approach generally has limited effectiveness and is only a post-mud sedimentation treatment, failing to address the root cause of the sedimentation. The resulting emptying and emptying of the tanks simply involves changing the tools used. Therefore, it is necessary to consider an integrated mixing device with jetting and rotating functions, suitable for rectangular tanks that require agitators for mud mixing, to achieve self-cleaning inside the tank, prevent mud sedimentation, and ensure the quality of drilling fluid mixing. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated, high-efficiency jet mixing device that solves the problem that drilling fluid easily solidifies and condenses on the tank wall or in dead corners after mixing stops, making it impossible to clean; thus laying the foundation for subsequent slurry mixing or other drilling processes.

[0006] The technical solution adopted in this invention is: an integrated high-efficiency jet mixing device, including a hollow mixing shaft, with an inlet pipe cap connected to the upper end of the mixing shaft and the lower end fixed on a buffer base. An impeller is connected to the lower end of the mixing shaft, with the impeller positioned near the buffer base. A jet guide is also provided on the mixing shaft, and a high-speed reducing nozzle is connected to the jet guide. The mixing shaft is driven to rotate by a rotating device connected to the agitator. An inlet pipe is connected to the inlet pipe cap, and an input union is provided on the inlet pipe. The agitator serves as the power unit, and drilling fluid flows through the union and into the mixing shaft cavity via the inlet pipe.

[0007] The invention is further characterized in that,

[0008] The rotating device includes a locking seat nested on the upper end of the stirring shaft. The outer ring of the locking seat is fixedly connected to the drive shaft fixing nut by threads. A sealing sleeve is fixed on the drive shaft fixing nut. A sealing rubber sleeve that fits against the side wall of the cap of the liquid inlet pipe is provided inside the sealing sleeve. The sealing rubber sleeve is fixed by an upper fixing plate and a lower fixing plate provided inside the sealing sleeve. The drive shaft fixing nut is fixedly connected to the vertically arranged drive shaft by a lever. The drive shaft is connected to the stirrer through a worm gear reducer and a coupling.

[0009] The sealing seat and the drive shaft fixing nut are integrated into one structure.

[0010] The locking seat rotates around the shaft via a thrust ball tapered roller bearing, which is nested on the stirring shaft and has a bearing retainer ring on its outer circumference.

[0011] Multiple jet mixing devices can be connected to the slurry delivery pipe by using a junction connector.

[0012] The contact surface between the locking seat and the lower fixed plate is also equipped with a sealing ring, which is used to seal the connection between the stirring shaft and the top cap of the liquid inlet pipe.

[0013] There are two sealing sleeves. The upper sealing sleeve is fixed and limited by the upper fixing plate, and the lower sealing sleeve is fixed and limited by the lower fixing plate.

[0014] The cushioned base is designed to assist in centering the stirring shaft, and features a rounded bottom sealing design.

[0015] The sealing sleeve has a high and low lip Y-shaped sealing structure, and the upper and lower fixing plates are adapted to the shape of the sealing sleeve.

[0016] A pressure plate is welded to the top of the inlet pipe cap. The pressure plate is fixedly connected to the fixed seat by bolts and nuts. The agitator, coupling, and turbine gearbox are fixed together on the support plate, and the fixed seat is fixed to the bottom of the support plate.

[0017] The beneficial effects of the present invention are: the sealing method of the present invention is similar to the flushing sealing method of a water tap or top drive. Its overall supporting solution can fully realize integrated stirring and mixing in the tank without increasing the original main equipment configuration and power consumption, preventing sedimentation and improving drilling fluid utilization.

[0018] 1. The agitator shaft is equipped with a jet nozzle that rotates with the impeller, providing a high-speed flushing function; reducing the load during startup and preventing motor burnout; it can replace the conventional agitator + drilling fluid gun configuration.

[0019] 2. The end face of the thrust tapered roller bearing is fixed.

[0020] 3. Double-layer sealing ring sleeve to ensure the sealing of pressurized rotating parts.

[0021] 4. Frame structure, high structural stability.

[0022] 5. The drilling fluid has high turbulence and good mixing effect.

[0023] 6. Multi-stage serial connection saves space; standard input union interface for easy assembly and disassembly. Attached image description:

[0024] Figure 1 This is a schematic diagram of the integrated high-efficiency jet mixing device of the present invention;

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 This is a typical installation diagram of the integrated high-efficiency jet mixing device of the present invention;

[0027] Figure 4 A typical schematic diagram of the connection between the integrated high-efficiency jet mixing device and the mixing pump of this invention.

[0028] In the diagram, 1. Agitator, 2. Input union connector, 3. Inlet pipe, 4. Agitator shaft, 5. Jet guide pipe, 6. High-speed reducing nozzle, 7. Impeller, 8. Buffer base, 9. Inlet pipe cap, 10. Sealing sleeve, 11. Drive shaft, 12. Thrust ball tapered roller bearing, 13. Locking seat, 14. Fixing nut, 15. Sealing sleeve, 16. Upper fixing seat of inlet pipe, 17. Upper fixing plate, 18. Lower fixing plate, 19. Bearing retaining ring, 20. Sealing ring, 21. Mixing slurry delivery pipe. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. All other embodiments obtained by those skilled in the art based on the described embodiments are within the scope of protection of the present invention.

[0030] like Figure 1 As shown, the present invention provides an integrated high-efficiency jet mixing device, including a hollow mixing shaft 4. The upper end of the mixing shaft 4 is connected to a liquid inlet pipe cap 9, and the lower end is fixed on a buffer base 8. An impeller 7 is connected to the lower end of the mixing shaft 4, and the impeller 7 is positioned near the buffer base 8. A jet conduit 5 is also provided on the mixing shaft 4, and a high-speed reducing nozzle 6 is connected to the jet conduit 5. The mixing shaft 4 is driven to rotate by a rotating device connected to the agitator 1. A liquid inlet pipe 3 is connected to the liquid inlet pipe cap 9, and an input union connector 2 is provided on the liquid inlet pipe 3. The agitator 1 serves as a power device, and drilling fluid flows through the union connector 2 and the liquid inlet pipe 3 into the cavity of the mixing shaft 4.

[0031] The rotating device includes a locking seat 13 nested on the upper end of the stirring shaft 4. The outer ring of the locking seat 13 is fixedly connected to the drive shaft fixing nut 14 by threads. A sealing sleeve 10 is fixed on the drive shaft fixing nut 14. A sealing rubber sleeve 15 is provided inside the sealing sleeve 10 to fit the side wall of the liquid inlet pipe cap 9. The sealing rubber sleeve 15 is fixed by an upper fixing plate 17 and a lower fixing plate 18 provided inside the sealing sleeve. The drive shaft fixing nut 14 is fixedly connected to the vertically arranged drive shaft 11 by a lever. The drive shaft 11 is connected to the stirrer 1 through a turbine reducer and a coupling. The sealing rubber sleeve 15 is a high-temperature resistant sealing rubber sleeve.

[0032] The sealing seat 10 and the drive shaft fixing nut 14 are an integral structure.

[0033] The locking seat 13 rotates around the shaft via a thrust ball tapered roller bearing 12. The thrust ball tapered roller bearing 12 is nested on the stirring shaft 4 and has a bearing retainer ring 19 on its outer circumference. The lower part of the thrust ball tapered roller bearing 12 is limited by a baffle welded to the stirring shaft.

[0034] Multiple jet mixing devices can be connected to the slurry delivery pipe 21 by inputting the union connector 2.

[0035] A sealing ring 20 is also provided on the contact surface between the locking seat 13 and the lower fixed plate 18. The sealing ring 20 is used to seal the connection between the stirring shaft 4 and the top cap 9 of the liquid inlet pipe.

[0036] There are two sealing sleeves 15. The upper sealing sleeve is fixed and limited by the upper fixing plate 17, and the lower sealing sleeve is fixed and limited by the lower fixing plate 18.

[0037] Mixer 1 is a horizontal mixer, mainly providing power.

[0038] The buffer base 8 is designed to assist the centering of the stirring shaft 4, and features a rounded bottom sealing design.

[0039] The sealing sleeve 15 has a high and low lip Y-shaped sealing structure, and the upper fixing plate 17 and the lower fixing plate 18 are adapted to the shape of the sealing sleeve 15.

[0040] A pressure plate is welded to the top of the inlet pipe cap 9. The pressure plate is fixedly connected to the fixed seat 16 by bolts and nuts. The agitator 1, coupling, and turbine gearbox are fixed together on the support plate. The fixed seat 16 is fixed to the bottom of the support plate.

[0041] Using a horizontal agitator 1 as the power unit, drilling fluid is input through a connector 2 and inlet pipe 3 into the hollow cavity inside the agitator shaft 4. High-speed fluid is generated from the injection conduit 5 and the narrow-bore nozzle 6, which then cleans and purifies the bottom and corners of the tank as the horizontal agitator 1 rotates. A buffer base 8 is designed for auxiliary centering of the agitator shaft 4, featuring a rounded bottom seal. Considering the effect of the mixed fluid design, the theoretical height of the impeller 7 cannot be too high; therefore, the injection conduit 5 and the narrow-bore nozzle 6 are located above the impeller 7. This effectively enhances the turbulent mixing effect of the impeller 7, promoting thorough mixing. Since the agitator rotation center is generally located at the center of the mixing volume, this device is typically designed with consistent length and width, and configured as needed. Figure 3 It is a typical dual-compartment, dual-stirring device configuration.

[0042] like Figure 2 As shown, the wear-resistant and high-temperature resistant sealing sleeve 15 of the integrated high-efficiency jet mixing device has a high-low lip Y-type sealing structure. After the two sets of sealing sleeves 15 are squeezed by the upper sealing sleeve fixing plate 17 and the lower sealing sleeve fixing plate 18, they are fitted by the sealing seat sleeve 10 and locked on the locking seat 13 by the meshing gear fixing nut 14. The locking direction is opposite to the movement direction of the main gear 11 to ensure the self-locking measures during the rotation process. The meshing gear fixing nut 14 is provided with a locking hole for easy operation. The upper sealing sleeve fixing plate 17 and the lower sealing sleeve fixing plate 18 are designed according to the contact shape of the sealing sleeve 15 and leave deformation gaps. The tightness of the liquid input into the inlet pipe 3 before jetting can be adjusted by the locking degree of the meshing gear fixing nut 14 to ensure the sealing effect while ensuring the maximum liquid inlet pressure.

[0043] The pressure plate welded to the upper part of the inlet pipe 3 is fixedly connected to the fixed seat 16 by bolts and nuts, and the top is sealed by the pipe cap 9. When the agitator is working, the main gear 11 drives the meshing gear fixing nut 14, and the thrust roller ball bearing 12 rotates with the agitator shaft 4. The agitator shaft 4 is made of thickened steel pipe, hollow and connected to the external input liquid. The upper part is sealed by the pipe cap 9 through the inlet pipe. During the rotation of the impeller shaft 7, wear-resistant and high-temperature resistant double-layer sealing ring 15 is used to ensure the sealing effect after the medium and low pressure drilling fluid enters. The drilling fluid passing through the hollow impeller shaft is sprayed out by the reduced diameter nozzle 6 located on the upper part of the impeller 7. At the beginning of the interaction design with the tank, the height and position of the nozzle 6 are determined so that during the rotation of the impeller, the nozzle 6 continuously flushes and mixes the rectangular tank base, increases the stirring premixing and turbulence intensity, and makes the drilling fluid fully mixed. At the same time, during the flushing process, the drilling fluid in the rectangular tank is free of residue, and the problem of drilling fluid easily turning into solid and condensing on the tank wall or dead corners after the mixing stops is eliminated.

[0044] like Figure 3 As shown, the integrated high-efficiency jet mixing device is typically installed above the mud tank. Due to the large size of the mud tank, at least two of these devices are usually required for a single tank. The inlet manifold can replace the original mud nozzle manifold or be installed separately.

[0045] like Figure 4 As shown. The implementation of the integrated high-efficiency jet mixing device requires that the discharge end of the mixing skid centrifugal pump group be connected to the inlet pipe. During normal operation, the opening and closing of the inlet pipe is switched by connecting the electric control valve group, so that the valve group is closed when the mixing pump is operating and the valve is opened after mixing is completed, or intermittent opening and closing, pulse jetting.

[0046] This invention can fully realize integrated stirring and mixing in the tank without increasing the original main equipment configuration and power consumption, thereby preventing sedimentation and improving the utilization rate of drilling fluid.

Claims

1. An integrated high-efficiency jet mixing device, characterized in that, The device includes a hollow stirring shaft (4), with an inlet pipe cap (9) connected to the upper end of the stirring shaft (4) and a buffer base (8) fixed to the lower end. An impeller (7) is connected to the lower end of the stirring shaft (4), with the impeller (7) located near the buffer base (8). A jet conduit (5) is also provided on the stirring shaft (4), and a high-speed reducing nozzle (6) is connected to the jet conduit (5). The stirring shaft (4) is driven to rotate by a rotating device connected to the agitator (1). An inlet pipe (3) is connected to the inlet pipe cap (9), and an input union connector (2) is provided on the inlet pipe (3). The agitator (1) serves as a power unit, and drilling fluid flows through the input union connector (2) and into the stirring shaft (4) cavity via the inlet pipe (3). The rotating device includes a locking seat (13) nested on the upper end of the stirring shaft (4). The outer ring of the locking seat (13) is fixedly connected to the drive shaft fixing nut (14) by threads. A sealing sleeve (10) is fixed on the drive shaft fixing nut (14). A sealing rubber sleeve (15) that fits the side wall of the liquid inlet pipe cap (9) is provided inside the sealing sleeve (10). The sealing rubber sleeve (15) is fixed by an upper fixing plate (17) and a lower fixing plate (18) provided inside the sealing sleeve. The drive shaft fixing nut (14) is fixedly connected to the vertically arranged drive shaft (11) by a lever. The drive shaft (11) is connected to the stirrer (1) through a turbine gearbox and a coupling. The locking seat (13) rotates around the shaft through a thrust ball tapered roller bearing (12), which is nested on the stirring shaft (4) and has a bearing retainer (19) on its outer circumference. The contact surface between the locking seat (13) and the lower fixed plate (18) is also provided with a sealing ring (20), which is used to seal the connection between the stirring shaft (4) and the top cap (9) of the liquid inlet pipe; Two sealing sleeves (15) are provided, wherein the upper sealing sleeve is fixed and limited by the upper fixing plate (17), and the lower sealing sleeve is fixed and limited by the lower fixing plate (18).

2. The integrated high-efficiency jet mixing device according to claim 1, characterized in that, The sealing seat (10) and the drive shaft fixing nut (14) are an integral structure.

3. The integrated high-efficiency jet mixing device according to claim 1, characterized in that, Multiple jet mixing devices can be connected to the slurry delivery pipe (21) via the input union connector (2).

4. The integrated high-efficiency jet mixing device according to claim 1, characterized in that, The buffer base (8) is an auxiliary centering design for the stirring shaft (4) and has a rounded bottom sealing design.

5. The integrated high-efficiency jet mixing device according to claim 1, characterized in that, The sealing sleeve (15) is a high-low lip Y-shaped sealing structure, and the upper fixing plate (17) and the lower fixing plate (18) are adapted to the shape of the sealing sleeve (15).

6. The integrated high-efficiency jet mixing device according to claim 1, characterized in that, The top cap (9) of the liquid inlet pipe is welded with a pressure plate. The pressure plate is fixedly connected to the fixed seat (16) by bolts and nuts. The agitator (1), coupling and turbine gearbox are fixed together on the support plate. The fixed seat (16) is fixed at the bottom of the support plate.

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