An oil drilling fluid mixing device

Abstract

The utility model relates to the technical field of drilling fluid mixer, specifically disclose a petroleum drilling fluid stirring device, including base and isolating shield, the base installs reducer and motor, the motor with the input end connection of reducer, the output end of reducer is connected with the impeller shaft, the impeller shaft is set vertically, the bottom of impeller shaft is connected with the stirring vane, the lower section of isolating shield is cylindrical, the upper section is conical, and the top of isolating shield is perforated, the outer wall of isolating shield is fixed with the guide arm, the guide arm vertically penetrates the base, the isolating shield can sink to the bottom of slurry tank and enclose the stirring vane in, the base is provided with the lock spare of the fixed guide arm, the stirring device provided by the utility model, through the additional isolating shield, can effectively reduce the motor starting torque under guaranteeing the impeller diameter, avoids the motor burnout.

Description

Technical Field

[0001] This utility model relates to the field of drilling fluid agitator technology, and in particular to an oil drilling fluid agitator device. Background Technology

[0002] Oil drilling fluid agitators are used in the mud purification system of oil drilling rigs. Their function is to fully agitate the mud in the mud tank, so that the mud is uniformly mixed, has stable performance, and prevents the deposition of solid phases (such as soil, barite, rock cuttings, etc.) at the bottom of the tank.

[0003] Before agitation, the solid phase in the mud tank settles naturally under gravity, resulting in a higher concentration of solids and a thicker mud at the bottom, while the upper part has less solids and a thinner mud. Currently, oil drilling fluid agitators are all impeller agitators, with the impeller approximately 100-300mm from the bottom of the tank, positioned in the dense mud. Due to the high density of the mud and the large diameter of the impeller, the starting torque of the agitator is excessive, frequently leading to overload and motor burnout. To address this issue, many agitator manufacturers use dual-impeller agitators, with a smaller diameter bottom impeller and a larger diameter top impeller. During agitation, the bottom impeller is positioned in the dense mud, while the upper impeller is in the thinner mud, thus reducing the starting torque. However, due to the smaller diameter of the bottom impeller, its agitation effect on dense mud is limited and requires improvement. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide an oil drilling fluid stirring device.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An oil drilling fluid stirring device includes a base and an isolation cover. A reducer and a motor are mounted on the base. The motor is connected to the input end of the reducer, and an impeller shaft is connected to the output end of the reducer. The impeller shaft is vertically arranged, and a stirring impeller is connected to the bottom of the impeller shaft. The lower section of the isolation cover is cylindrical, the upper section is conical, and the top of the isolation cover has an opening. A guide arm is fixed to the outer wall of the isolation cover. The guide arm vertically penetrates the base. The isolation cover can sink to the bottom of the mud tank and surround the stirring impeller. A locking device for fixing the guide arm is provided on the base.

[0007] Furthermore, the isolation cover is coaxially arranged with the impeller shaft, the isolation cover is coaxially arranged with the stirring impeller shaft, the diameter of the top opening of the isolation cover is 1 / 3-1 / 2 of the diameter of the stirring impeller, and the diameter of the cylindrical section of the isolation cover is 10-15cm larger than the diameter of the stirring impeller.

[0008] Furthermore, the locking component includes a fixed base and a pin. The fixed base is fixedly connected to the base near the guide arm. The pin is transversely inserted into the fixed base. A limiting hole is opened at the lower part of the guide arm. Pulling the guide arm upward can align the limiting hole with the pin. The pin can be inserted into the limiting hole. When the pin is inserted into the limiting hole, the isolation cover is located above the mud surface.

[0009] Furthermore, a hook hole is provided at the top of the guide arm.

[0010] Furthermore, the stirring impeller is an axial flow impeller.

[0011] The beneficial effects of this utility model are as follows: By adding an isolation cover, when the motor starts, the isolation cover sinks to the bottom, surrounding the stirring impeller and cutting off the mud. This can effectively reduce the resistance of the dense mud to the stirring impeller, avoid excessive motor starting torque, and reduce the risk of motor burnout. After the motor starts, the guide arm is slowly pulled upward to expose the stirring impeller, allowing for normal mud stirring. Since the isolation cover reduces the risk of motor burnout, the diameter of the stirring impeller can be increased to ensure the stirring effect. Attached Figure Description

[0012] Figure 1 A perspective view of the bottom of the isolation enclosure;

[0013] Figure 2 A front view of the bottom of the isolation enclosure;

[0014] Figure 3 This is a front view of the isolation shield after it has been raised.

[0015] Explanation of the attached drawing numbers: 1. Base, 2. Motor, 3. Reducer, 4. Impeller shaft, 41. Connecting plate, 5. Agitator impeller, 6. Isolation cover, 61. Guide arm, 611. Limiting hole, 612. Hook hole, 7. Fixing seat, 8. Pin. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0017] like Figures 1-3As shown, the oil drilling fluid mixing device includes a base 1, a motor 2, a reducer 3, an impeller shaft 4, a mixing impeller 5, and an isolation cover 6. The reducer 3 and the motor 2 are mounted on the top of the base 1. The reducer 3 is a worm gear reducer. The main shaft of the motor 2 is connected to the input shaft flange of the reducer 3, and the output shaft of the reducer 3 is connected to the flange of the impeller shaft 4. The impeller shaft 4 is vertically arranged, and a connecting plate 41 is welded to the bottom of the impeller shaft 4. The mixing impeller 5 is fixed to the connecting plate 41 by four sets of bolts and nuts. At the bottom of 1, the lower section of the isolation cover 6 is cylindrical and the upper section is conical, and the top of the isolation cover 6 has an opening. A guide arm 61 is fixed to the outer wall of the conical section of the isolation cover 6. The guide arm 61 vertically penetrates the base 1. The longitudinal section of the guide arm 61 is rectangular. The base 1 is provided with a locking device to fix the guide arm 61. The base 1 can be fixed on the perforated plate at the top of the mud tank (oil drilling fluid is also called mud, not shown in the figure). The isolation cover 6 can sink to the bottom of the mud tank and surround the stirring impeller 5.

[0018] In actual use, before starting the motor 2, first let the isolation cover 6 sink to the bottom, surrounding the stirring impeller 5. The isolation cover 6 cuts off the dense mud, reducing the contact between the mud inside and outside the isolation cover 6. When the stirring impeller 5 rotates, it will be affected by less mud, which can effectively reduce the resistance of the dense mud to the stirring impeller 5, avoid excessive starting torque of the motor 2, and reduce the risk of motor 2 burning out. After the motor 2 starts, slowly pull the guide arm 61 upward to expose the stirring impeller 5, so that the mud can be stirred normally. Then, place the isolation cover 6 above the mud surface and use the locking device to fix the guide arm 61 to prevent the isolation cover 6 from affecting the stirring effect.

[0019] In this embodiment, the isolation cover 6 is coaxially arranged with the impeller shaft 4. The diameter of the opening at the top of the isolation cover 6 is 1 / 2 of the diameter of the stirring impeller 5. The diameter of the cylindrical section of the isolation cover 6 is 10cm larger than the diameter of the stirring impeller 5. This design is reasonable and facilitates the smooth passage of mud through the opening at the top of the isolation cover 6, allowing the isolation cover 6 to sink smoothly to the bottom. The cylindrical section of the isolation cover 6 will not affect the rotation of the stirring impeller 5.

[0020] In this embodiment, the locking component includes a fixing seat 7 and a pin 8. The fixing seat 7 is welded to the base 1 near the guide arm 61. The pin 8 is horizontally inserted into the fixing seat 7. A limiting hole 611 is opened at the lower part of the guide arm 61. Pulling the guide arm 61 upward can align the limiting hole 611 with the pin 8, and the pin 8 can be inserted into the limiting hole 611. When the pin 8 is inserted into the limiting hole 611, the isolation cover 6 is located above the mud surface. The design is reasonable and facilitates the stable fixing of the guide arm 61, preventing the isolation cover 6 from falling.

[0021] In this embodiment, a hook hole 612 is provided at the top of the guide arm 61. The hook hole 612 allows an iron rod to be passed through it, thereby facilitating the upward lifting of the guide arm 61.

[0022] In this embodiment, the stirring impeller is an axial flow impeller, which includes four blades. The axial flow impeller forms a vortex around the stirring impeller and is accompanied by axial flow, resulting in good stirring effect.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oil drilling fluid stirring device, comprising a base (1), on which a reducer (3) and a motor (2) are mounted, the motor (2) being connected to the input end of the reducer (3), and an impeller shaft (4) being connected to the output end of the reducer (3), the impeller shaft (4) being vertically arranged, and a stirring impeller (5) being connected to the bottom of the impeller shaft (4), characterized in that, The stirring device also includes an isolation cover (6), the lower section of which is cylindrical and the upper section is conical, and the top of the isolation cover (6) has an opening. A guide arm (61) is fixed to the outer wall of the isolation cover (6), and the guide arm (61) vertically penetrates the base (1). The isolation cover (6) can sink to the bottom of the mud tank and surround the stirring impeller (5). A locking device for fixing the guide arm (61) is provided on the base (1).

2. The oil drilling fluid stirring device according to claim 1, characterized in that, The isolation cover (6) is coaxially arranged with the impeller shaft (4). The diameter of the opening at the top of the isolation cover (6) is 1 / 3 to 1 / 2 of the diameter of the stirring impeller (5). The diameter of the cylindrical section of the isolation cover (6) is 10-15 cm larger than the diameter of the stirring impeller (5).

3. The oil drilling fluid stirring device according to claim 1, characterized in that, The locking component includes a fixed base (7) and a pin (8). The fixed base (7) is fixedly connected to the base (1) near the guide arm (61). The pin (8) is horizontally inserted in the fixed base (7). A limiting hole (611) is opened at the lower part of the guide arm (61). Pulling the guide arm (61) upward can align the limiting hole (611) with the pin (8). The pin (8) can be inserted into the limiting hole (611). When the pin (8) is inserted into the limiting hole (611), the isolation cover (6) is located above the mud surface.

4. The oil drilling fluid stirring device according to claim 1, characterized in that, The top of the guide arm (61) is provided with a hook hole (612).

5. The oil drilling fluid stirring device according to claim 1, characterized in that, The stirring impeller (5) is an axial flow impeller.

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