Automatic cleaning device of vibrating screen for drilling fluid

Abstract

The invention provides reservoir transformation of an automatic cleaning device of a vibrating screen for drilling fluid, which comprises a motor, a power converter connected with an output shaft of the motor, and a sliding rod with a first end connected with the power converter, the sliding rod is vertically arranged, a second end of the sliding rod is connected with a brush, and the motor is used for providing rotary motion for the power converter. The power converter can convert rotary motion provided by the motor into linear reciprocating motion of the sliding rod, so that the sliding rod drives the brush to clean the vibrating screen cloth. The cleaning efficiency of the vibrating screen cloth can be improved, meanwhile, labor resources are saved, it is guaranteed that operators do not make direct contact with the vibrating screen when the vibrating screen runs out of slurry, and therefore the safety risk is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of drilling fluid solid phase control, and more specifically, to an automatic cleaning device for a drilling fluid vibrating screen. Background Technology

[0002] The drilling fluid vibrating screen is the most important solids control equipment in the drilling fluid solids control system. During drilling, the rock cuttings broken by the drill bit are carried back to the surface from the annulus by the drilling fluid and enter the vibrating screen for filtration. The vibrating screen removes inferior solids such as rock cuttings, thus ensuring the cleanliness of the drilling fluid. The screen cloth used in the vibrating screen has various mesh sizes and can be changed according to the size of the rock cuttings and the requirements of the drilling fluid treatment.

[0003] During drilling, factors such as excessive solid content in the drilling fluid, excessively high viscosity, and incomplete dissolution of polymers causing slurry leakage can all lead to drilling fluid failing to pass through the vibrating screen cloth and enter the circulation system, resulting in vibrating screen slurry leakage. Vibrating screen slurry leakage has the following hazards: waste of drilling fluid, leading to increased costs; generation of large amounts of waste drilling fluid, which is difficult to treat harmlessly and pollutes the environment; and difficulty in monitoring the circulating fluid level, making it impossible to accurately determine complex situations such as well leakage and well kick, thus increasing drilling safety risks.

[0004] Currently, to prevent slurry leakage from vibrating screens, the common practice on-site is to manually clean the screens with brushes. This method has the following drawbacks: it requires a large number of vibrating screens and a certain number of manual operators, which is time-consuming and labor-intensive. Furthermore, when slurry leakage from the vibrating screen is severe, manual cleaning is inefficient and cannot meet the requirements. Additionally, drilling fluid contains complex chemical substances, and when slurry leaks from the vibrating screen, the drilling fluid is prone to splashing, making manual cleaning dangerous and detrimental to health. Summary of the Invention

[0005] One objective of this invention is to provide an automatic cleaning device for a drilling fluid vibrating screen, which improves cleaning efficiency and saves labor resources. When the vibrating screen is leaking slurry, it ensures that the operator does not come into direct contact with the vibrating screen, thereby greatly reducing safety risks.

[0006] According to the present invention, an automatic cleaning device for a vibrating screen for drilling fluid is provided, comprising: a motor, a power converter connected to the output shaft of the motor, and a slide rod with a first end connected to the power converter. The slide rod is vertically arranged and a brush is connected to its second end. The motor is used to provide rotational motion to the power converter, and the power converter can convert the rotational motion provided by the motor into linear reciprocating motion of the slide rod, so that the slide rod drives the brush to clean the vibrating screen cloth.

[0007] In a preferred embodiment, the power converter includes a drive shaft with its first end connected to the output shaft of a motor, a drive wheel disposed on the second end of the drive shaft, and a driven wheel and a rack that can mesh with the drive wheel respectively. The driven wheel and the rack are always meshed. The slide rod is connected to the bottom of the rack. When the drive wheel is not meshed with the driven wheel, the drive wheel can rotate to mesh with the rack, thereby driving the rack to move linearly in a first direction. When the drive wheel rotates to mesh with the driven wheel, the drive wheel drives the driven wheel to rotate in the opposite direction, and the driven wheel can drive the rack to move linearly in a second direction opposite to the first direction.

[0008] In a preferred embodiment, the driven wheel is configured to have teeth on one semicircular body and no teeth on the other semicircular body, and the teeth on the driving wheel are symmetrically distributed. When the driving wheel rotates one revolution, the driven wheel can intermittently rotate one revolution following the driving wheel, and the number of teeth on the driven wheel is greater than the number of teeth on the driving wheel.

[0009] In a preferred embodiment, the automatic cleaning device for drilling fluid vibrating screen further includes a walking beam, which has two opposing slide rails, and a portion of the slide rod is disposed between the two slide rails and slides in contact with the slide rails.

[0010] In a preferred embodiment, the drilling fluid vibrating screen automatic cleaning device further includes two supports arranged opposite each other, with the two ends of the walking beam respectively connected to the tops of the two supports.

[0011] In a preferred embodiment, the automatic cleaning device for drilling fluid vibrating screens further includes a controller connected to the motor.

[0012] In a preferred embodiment, the controller includes a switch button for controlling the start and stop of the motor.

[0013] In a preferred embodiment, the controller further includes a power adjustment knob for controlling the output power of the motor.

[0014] In a preferred embodiment, the automatic cleaning device for the drilling fluid vibrating screen further includes a laser rangefinder disposed on the lower surface of the walking beam. The laser rangefinder and the motor are both communicatively connected to the controller. The laser rangefinder is used to test the liquid flow height on the vibrating screen cloth and transmits the measured height value to the controller as a signal. The controller can control the rotation speed of the motor according to the liquid level height and speed relationship curve set by the controller program.

[0015] In a preferred embodiment, the automatic cleaning device for drilling fluid vibrating screen further includes a hydraulic lifter and a lifting linkage connected to the hydraulic lifter. The lifting linkage is also fixedly connected to the motor. The hydraulic lifter can drive the lifting linkage to rise and fall, and the lifting linkage can then drive the motor and power converter to rise and fall as a whole. The power converter then drives the brush to rise and fall.

[0016] This invention has at least the following technical effects:

[0017] According to the present invention, a motor, a power converter connected to the output shaft of the motor, and a slide rod with its first end connected to the power converter are provided. Since the slide rod is vertically arranged and a brush is connected to its second end, the motor provides rotational motion to the power converter through its output shaft. The power converter can convert the rotational motion provided by the motor output shaft into linear reciprocating motion of the slide rod, so that the slide rod drives the brush to clean the vibrating screen cloth. This allows the vibrating screen cloth to be automatically cleaned using the drilling fluid vibrating screen automatic cleaning device of the present invention, improving cleaning efficiency and saving labor resources. Furthermore, when the vibrating screen is leaking slurry, the operator does not directly contact the vibrating screen, thereby greatly reducing safety risks.

[0018] According to the present invention, the walking beam has slide rails arranged opposite to each other, and a portion of the slide rod is disposed between the two slide rails and slides in contact with the slide rails so as to be able to move between the two guide rails along the axial direction of the walking beam. The guide rails in the walking beam are used to guide and support the linear reciprocating motion of the slide rod, thereby enabling the brush to have high cleaning efficiency.

[0019] According to the present invention, two supports are provided that are arranged opposite to each other along the axial direction of the walking beam, and the two ends of the walking beam are respectively connected to the top of the two supports, so that the walking beam can be supported by the supports and the stability of the walking beam can be maintained during the cleaning of the vibrating screen cloth.

[0020] According to the present invention, the controller further includes a power adjustment knob for controlling the output power of the motor. Since the present invention uses a motor to drive a power converter, the power converter in turn drives the slide bar and the brush to clean the vibrating screen cloth, thereby addressing the issue of "slurry leakage" in the vibrating screen. The output power of the motor can be adjusted by the power adjustment knob to improve cleaning efficiency.

[0021] According to the present invention, a hydraulic lifter and a lifting link connected to the hydraulic lifter are provided. The lifting link is also fixedly connected to a motor. The hydraulic lifter can drive the lifting link to rise and fall. The lifting link can then drive the motor and power converter to rise and fall together. The power converter can then drive the brush to rise and fall. Thus, the brush can be raised and lowered according to the liquid flow rate and slurry leakage on the upper surface of the vibrating screen cloth, so as to avoid the brush from contacting the vibrating screen cloth when there is no slurry leakage, thereby reducing the wear of the vibrating screen step.

[0022] The automatic cleaning device for drilling fluid vibrating screens of the present invention further includes a laser rangefinder disposed on the lower surface of the walking beam. Both the laser rangefinder and the motor are communicatively connected to the controller. The laser rangefinder is used to test the liquid flow height on the vibrating screen cloth and transmits the measured height value to the controller as a signal. The controller can control the rotation speed of the motor according to the liquid level height and speed relationship curve set in the controller program, thereby automatically controlling the reciprocating motion frequency of the brush according to the liquid flow rate on the vibrating screen cloth. Ultimately, it realizes the automatic control of the liquid flow rate and cleaning frequency on the vibrating screen cloth, avoids over-cleaning of the vibrating screen cloth, and reduces wear on the vibrating screen cloth. Attached Figure Description

[0023] Figure 1 A schematic diagram of the overall structure of the automatic cleaning device for a vibrating screen for drilling fluid according to the present invention is shown.

[0024] Figure 2 A schematic diagram of the power converter structure of the automatic cleaning device for a vibrating screen for drilling fluid according to the present invention is shown.

[0025] As shown in the figure:

[0026] Motor-1;

[0027] Power Converter-2;

[0028] Slide bar -3;

[0029] Brush-4;

[0030] Vibrating screen cloth -5;

[0031] Drive shaft-21;

[0032] Drive wheel-23;

[0033] Driven wheel-22;

[0034] Straight rack-24;

[0035] Yuliang-6;

[0036] Bracket-7;

[0037] Controller-8;

[0038] Laser rangefinder-9;

[0039] Hydraulic lifting device-10;

[0040] Lifting Linkage -11;

[0041] In this application, all drawings are schematic and are used only to illustrate the principles of the invention, and are not drawn to scale. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be understood that the terms "horizontal," "axial," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In this invention, "a plurality of" refers to two or more.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] like Figure 1 As shown, the automatic cleaning device 100 for drilling fluid vibrating screens of the present invention includes: a motor 1, a power converter 2 connected to the output shaft of the motor 1, and a slide rod 3 with its first end connected to the power converter 2. The slide rod 3 is vertically arranged and its second end is connected to a brush 4. The motor 1 provides rotational motion to the power converter 2 through its output shaft. The power converter can convert the rotational motion provided by the motor 1 into linear reciprocating motion of the slide rod 3, so that the slide rod 3 drives the brush 4 to clean the vibrating screen cloth 5.

[0046] According to the present invention, a motor 1, a power converter 2 connected to the output shaft of the motor 1, and a slide rod 3 with its first end connected to the power converter 2 are provided. Since the slide rod 3 is vertically arranged and its second end is connected to a brush 4, the motor 1 provides rotational motion to the power converter 2 through its output shaft. The power converter can convert the rotational motion provided by the output shaft of the motor 1 into linear reciprocating motion of the slide rod 3, so that the slide rod 3 drives the brush 4 to clean the vibrating screen cloth 5. This allows the drilling fluid vibrating screen automatic cleaning device 100 of the present invention to automatically clean the vibrating screen cloth 5, improving cleaning efficiency and saving labor resources. Furthermore, when the vibrating screen is leaking slurry, the operator does not directly contact the vibrating screen, thereby greatly reducing safety risks.

[0047] In one or more embodiments, the power range of the motor 1 of the present invention is 1000-3000W, and the speed range is 0-200r / min.

[0048] In one or more embodiments, the brush 3 of the present invention includes a main body and a plurality of cleaning portions connected to the main body, each having a parallel arrangement extending along the length of the vibrating screen cloth 5, thereby increasing the cleaning area with the vibrating screen cloth 5. The main body is perpendicular to each cleaning portion.

[0049] like Figure 2 As shown, in one or more embodiments, the power converter 2 includes a drive shaft 21 with its first end connected to the output shaft of the motor 1, a drive wheel 23 disposed on the second end of the drive shaft 21, and a driven wheel 22 and a rack 24 capable of meshing with the drive wheel 23 respectively. The driven wheel 22 and the rack 24 are always meshed, and a slide rod 3 is connected to the bottom of the rack 24. Optionally, the first end of the drive shaft 21 is fixedly connected to the output shaft of the motor 1 by a thread, and their axes coincide. The drive wheel 23 is sleeved on the second end of the drive shaft 21. It should be noted that the driven wheel 22 has teeth on one semicircular body and no teeth on the other semicircular body, and the teeth on the drive wheel 23 are symmetrically distributed. When the drive wheel 23 rotates one revolution, the driven wheel 22 also rotates one revolution intermittently, and the number of teeth on the driven wheel 22 is greater than the number of teeth on the drive wheel 23. When the driving wheel 23 is not engaged with the driven wheel 22, the driving wheel 23 can engage with the rack 24 by rotating, and the driven wheel 22 is always engaged with the rack 24, so as to drive the rack 24 to move linearly in the first direction; then, when the driving wheel 23 rotates to engage with the driven wheel 22, the driving wheel drives the driven wheel 22 to rotate in the opposite direction, and the driven wheel 22 can drive the rack 24 to move linearly in the second direction opposite to the first direction.

[0050] In one or more embodiments, a vertical rod 241 is provided at the bottom of the rack 24, and the vertical rod 241 is connected to the slide rod 3.

[0051] In one or more embodiments, the drilling fluid vibrating screen automatic cleaning device 100 of the present invention further includes a walking beam 6, which has two slide rails (not shown) extending along the axial direction of the walking beam 6 and arranged opposite to each other. Part of the slide rod 3 is disposed between the two slide rails and slides in contact with the slide rails so as to be able to move between the two guide rails along the axial direction of the walking beam 6.

[0052] According to the present invention, the walking beam 6 has a slide rail arranged opposite to each other, and a portion of the slide rod is arranged between the two slide rails and slides in contact with the slide rails so that it can move between the two guide rails along the axial direction of the walking beam 6. The guide rails in the walking beam 6 are used to guide and support the linear reciprocating motion of the slide rod 3, thereby enabling the brush 4 to have high cleaning efficiency.

[0053] In one or more embodiments, the drilling fluid vibrating screen automatic cleaning device 100 of the present invention further includes two supports 7 arranged opposite to each other along the axial direction of the walking beam 6, with the two ends of the walking beam 6 respectively connected to the top ends of the two supports 7.

[0054] According to the present invention, two supports 7 are provided that are arranged opposite to each other along the axial direction of the walking beam 6. The two ends of the walking beam 6 are respectively connected to the top of the two supports 7, so that the walking beam 6 can be supported by the supports 7 and the stability of the walking beam 6 can be maintained during the cleaning of the vibrating screen cloth.

[0055] In one or more embodiments, a controller 8 connected to the motor 1 is also included, which can be used to control the starting and stopping, power and speed of the motor 1.

[0056] In one or more embodiments, the controller 8 includes a switch button (not shown) for controlling the start and stop of the motor 1.

[0057] In one or more embodiments, the controller 8 further includes a power adjustment knob (not shown) for controlling the output power of the motor 1.

[0058] According to the present invention, the controller 8 also includes a power adjustment knob (not shown) for controlling the output power of the motor 1. Since the present invention uses the motor 1 to drive the power converter 2, the power converter 2 in turn drives the slide bar 3 and the brush 4 to clean the vibrating screen cloth 5, thereby addressing the issue of "slurry leakage" in the vibrating screen, the output power of the motor 1 can be adjusted by the power adjustment knob to improve cleaning efficiency.

[0059] In one or more embodiments, the controller 8 further includes a speed adjustment knob (not shown) for controlling the rotational speed of the motor 1.

[0060] When the vibrating screen experiences slurry leakage, the power adjustment knob and speed adjustment knob can be adjusted to make the motor 1 output different power and speed until the vibrating screen cloth 5 no longer experiences slurry leakage and the brush 4 moves smoothly. If the vibrating screen continues to not leak slurry, the drilling fluid vibrating screen automatic cleaning device 100 described in this invention can be turned off.

[0061] According to the present invention, the controller 8 also includes a speed adjustment knob for controlling the speed of the motor 1. Since the present invention uses the motor 1 to drive the power converter 2, the power converter 2 in turn drives the slide bar 3 and the brush 4 to clean the vibrating screen cloth 5, thereby addressing the issue of "slurry leakage" in the vibrating screen, the speed of the motor 1 can be adjusted by the speed adjustment knob to improve cleaning efficiency.

[0062] In one or more embodiments, the drilling fluid vibrating screen automatic cleaning device 100 of the present invention further includes a laser rangefinder 9 disposed on the lower surface of the walking beam 6. The laser rangefinder 9 and the motor 1 are both communicatively connected to the controller 8. The laser rangefinder 9 is used to test the liquid flow height on the vibrating screen cloth 5 and transmits the measured height value to the controller 8 in the form of a signal. The controller 8 can control the rotation speed of the motor 1 according to the liquid level height and speed relationship curve set by the controller program, thereby automatically controlling the reciprocating motion frequency of the brush 4 according to the liquid flow rate on the vibrating screen cloth, and finally realizing the automatic control of the liquid flow rate and cleaning frequency on the vibrating screen cloth 5, avoiding over-cleaning of the vibrating screen cloth 5 and reducing wear on the vibrating screen cloth 5.

[0063] In one or more embodiments, the drilling fluid vibrating screen automatic cleaning device 100 of the present invention further includes a hydraulic lifter 10 and a lifting link 11 connected to the hydraulic lifter 10. The lifting link 11 is also fixedly connected to the motor 1. The hydraulic lifter 10 can drive the lifting link 11 to rise and fall. The lifting link 11 can then drive the motor 1 and the power converter 2 to rise and fall as a whole. The power converter 2 can then drive the brush 4 to rise and fall.

[0064] According to the present invention, a hydraulic lifter 10 and a lifting link 11 connected to the hydraulic lifter 10 are provided. The lifting link 11 is also fixedly connected to the motor 1. The hydraulic lifter 10 can drive the lifting link 11 to rise and fall. The lifting link 11 can then drive the motor 1 and the power converter 2 to rise and fall together. The power converter 2 can then drive the brush 4 to rise and fall. Thus, the brush 4 can be controlled to rise and fall according to the liquid flow rate and slurry leakage on the upper surface of the vibrating screen cloth 5, so as to avoid the brush 4 from contacting the vibrating screen cloth 5 when there is no slurry leakage, thereby reducing the wear of the vibrating screen 5.

[0065] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An automatic cleaning device for a vibrating screen used in drilling fluid, comprising: The system includes a motor, a power converter connected to the output shaft of the motor, and a slide rod with its first end connected to the power converter. The slide rod is vertically positioned and has a brush connected to its second end. The motor provides rotational motion to the power converter, which converts the rotational motion provided by the motor into linear reciprocating motion of the slide bar, so that the slide bar drives the brush to clean the vibrating screen cloth.

2. The automatic cleaning device for drilling fluid vibrating screens according to claim 1, characterized in that, The power converter includes a drive shaft with its first end connected to the output shaft of a motor, a drive wheel disposed on the second end of the drive shaft, and a driven wheel and a rack that can mesh with the drive wheel respectively. The driven wheel and the rack are always meshed, and the slide rod is connected to the bottom of the rack. When the driving wheel is not engaged with the driven wheel, the driving wheel can engage with the rack by rotating, thereby driving the rack to move in a straight line in the first direction; when the driving wheel rotates to engage with the driven wheel, the driving wheel drives the driven wheel to rotate in the opposite direction, and the driven wheel can drive the rack to move in a straight line in the second direction opposite to the first direction.

3. The automatic cleaning device for drilling fluid vibrating screens according to claim 2, characterized in that, The driven wheel is constructed with teeth on one semicircular body and no teeth on the other semicircular body, and the teeth on the driving wheel are symmetrically distributed. When the driving wheel rotates one revolution, the driven wheel can follow the driving wheel to rotate one revolution intermittently, and the number of teeth on the driven wheel is greater than the number of teeth on the driving wheel.

4. The automatic cleaning device for drilling fluid vibrating screens according to claim 3, characterized in that, It also includes a walking beam, which has two opposing slide rails, and a portion of the slide rod is disposed between the two slide rails and slides in contact with the slide rails.

5. The automatic cleaning device for vibrating screens used in drilling fluid according to claim 4, characterized in that, It also includes two supports arranged opposite each other, with the two ends of the walking beam respectively connected to the top of the two supports.

6. The automatic cleaning device for drilling fluid vibrating screens according to claim 1, characterized in that, It also includes a controller connected to the motor.

7. The automatic cleaning device for drilling fluid vibrating screens according to claim 6, characterized in that, The controller includes a switch button for controlling the start and stop of the motor.

8. The automatic cleaning device for drilling fluid vibrating screens according to claim 6, characterized in that, The controller also includes a power adjustment knob for controlling the output power of the motor.

9. The automatic cleaning device for a vibrating screen for drilling fluid according to claim 6, characterized in that, It also includes a laser rangefinder disposed on the lower surface of the walking beam. The laser rangefinder and the motor are both communicatively connected to the controller. The laser rangefinder is used to test the liquid flow height on the vibrating screen cloth and transmits the measured height value to the controller as a signal. The controller can control the rotation speed of the motor according to the liquid level height and speed relationship curve set by the controller program.

10. The automatic cleaning device for a vibrating screen for drilling fluid according to claim 2, characterized in that, It also includes a hydraulic lifter and a lifting linkage connected to the hydraulic lifter. The lifting linkage is also fixedly connected to the motor. The hydraulic lifter can drive the lifting linkage to rise and fall. The lifting linkage can then drive the motor and power converter to rise and fall together. The power converter can then drive the brush to rise and fall.

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