Drilling tool capable of being lubricated circularly

Abstract

The utility model belongs to the technical field of drilling tool manufacturing, and particularly relates to a drilling tool capable of being lubricated circularly, which comprises a drill bit body, a support leg integrated on the drill bit body, a cone embedded with alloy teeth, a ball bearing for connecting the cone and the support leg, and a circulating lubricating device detachably positioned on the support leg, the circulating lubricating device is associated with the ball bearing so as to lubricate balls in the ball bearing; wherein the supporting legs are provided with oil inlet channels and oil return channels which are communicated with the space where the balls are located. The bearing is stably and continuously lubricated through the lubricating oil flowing circularly, metal contact in a bearing pair is reduced, so that friction of moving parts is reduced, abrasion between the moving parts is reduced, the service life of the bearing and the service life of a drilling tool can be remarkably prolonged through good circulating lubrication, and the operation efficiency of drilling equipment is effectively improved.

Description

Technical Field

[0001] The present application belongs to the technical field of drilling tool manufacturing, and in particular to a drilling tool capable of cyclic lubrication. Background Art

[0002] In the exploration and exploitation of oil, natural gas, geology, coal fields, hydrology, and foundation drilling, modern advanced construction technology and drilling equipment are needed to ensure the safe, reliable, fast and convenient operation process. The roller drill bit is widely used in drilling construction because it can effectively impact, crush and shear the formation rock when rotating, and has the advantages of strong formation adaptability and high perforation rate.

[0003] The structure of a roller drill bit includes a drill bit body, a roller with alloy teeth, and a bearing used to reduce the friction between the roller and the drill bit body; when the roller drill bit is working, the roller rotates relative to the drill bit body, thereby achieving a grinding-type hole opening on the target object. Among them, the bearing is an important component of the roller drill bit. It provides stable support for the roller drill bit, withstands the axial and radial loads generated by the drill bit during the drilling process, reduces the internal friction of the drill bit, reduces energy loss, and improves the mechanical efficiency of the drill bit. Because in order to better keep the roller drill bit working, the bearing needs to be lubricated.

[0004] However, the existing design still has deficiencies in lubricating the roller bit bearings, resulting in unsatisfactory bearing lubrication effects. Insufficient lubrication of the roller bit bearings will accelerate bearing wear and lead to premature bearing failure; at the same time, lack of lubrication will increase the friction coefficient, thereby increasing friction power consumption, causing energy loss and temperature rise, affecting the performance and life of the drill bit, and further affecting the drill bit's ability to break rocks; increasing the maintenance and replacement frequency of the drill bit, thereby increasing drilling costs.

[0005] Therefore, in order to better improve the service life of the roller drill bit, the present application optimizes the lubrication solution for the roller drill bit. Utility Model Content

[0006] One advantage of the present application is that it provides a drill tool with circulatory lubrication, which can stably and continuously lubricate the bearings through the lubricating oil circulating inside the drill tool, reduce metal contact inside the bearings, thereby reducing component friction and wear between moving parts. Good lubrication significantly extends the service life of the bearings and the entire drill tool, effectively improving the drilling efficiency of the drilling equipment.

[0007] Another advantage of the present application is that it provides a drilling tool with circulatory lubrication, in which the lubricating oil can take away the heat generated by friction, thereby helping to cool the bearings and the drilling tool and prevent overheating.

[0008] Another advantage of the present application is that it provides a drilling tool with circulatory lubrication, wherein the lubricating oil can clean the impurities and wear particles inside the bearing to prevent them from causing further damage to the bearing.

[0009] Another advantage of the present application is that it provides a drilling tool with circulating lubrication, and the circulating lubrication device is detachable. The circulating lubrication device of the drilling tool can be quickly replaced each time or at certain time intervals, thereby ensuring the lubrication effect on the bearings, reducing the damage rate of the drilling tool, and thus ensuring drilling efficiency.

[0010] Another advantage of the present application is that it provides a drilling tool with circulatory lubrication. Through the lubricating oil that circulates inside the present application, the drilling tool is sequentially lubricated and cooled, which can reduce the wear and failure of the drilling tool, thereby reducing the maintenance requirements and downtime, and improving the drilling efficiency. In addition, the service life of the drilling tool is extended and maintenance is reduced. Circulating lubrication helps to reduce the total cost of drilling operations.

[0011] Another advantage of the present application is that it provides a drill tool with circulatory lubrication. Circulating lubrication helps to maintain the mechanical properties of the drill tool, especially in the maintenance of carbide teeth or steel teeth, which can maintain high-speed drilling and improve the overall performance of the drill tool; it can adapt to different drilling conditions and maintain good lubrication effects regardless of soft, medium or hard formations, ensuring efficient operation of the drill tool.

[0012] In order to achieve at least one of the above advantages or other advantages and purposes, according to one aspect of the present application, a drilling tool with circulating lubrication is provided, comprising a drill bit body, a support foot integrated on the drill bit body, a cone with alloy teeth, a ball bearing for connecting the cone and the support foot, and a detachable circulating lubrication device located on the support foot, wherein the circulating lubrication device is associated with the ball bearing to lubricate the balls in the ball bearing; wherein

[0013] The support leg is provided with an oil inlet channel and an oil return channel which are connected with the space where the ball is located;

[0014] Among them, the circulating lubrication device includes a shell, a piston for lubricating oil to pass through in one direction, and a driving member whose output shaft can rotate forward and reversely. The piston divides the interior of the shell into an oil outlet chamber and an oil return chamber. The driving member drives the piston to squeeze the lubricating oil in the oil outlet chamber into the oil inlet channel, and the lubricating oil inside the ball bearing flows back to the oil return chamber synchronously through the oil return channel.

[0015] In the circulatory lubricated drilling tool described in the present application, the piston includes a piston body and a movable leaf which is arranged on the piston body and can be flipped unidirectionally. The piston body is provided with a circular hole for the lubricating oil to pass through. The movable leaf blocks the circular hole when the piston squeezes out the lubricating oil in the oil chamber.

[0016] In the circulatory lubricated drilling tool described in the present application, a plurality of arc-shaped branches are provided on the piston body, a connecting portion with an internal threaded hole is provided on the top of the plurality of branches, and the output shaft of the driving member is threadedly connected to the connecting portion.

[0017] In the circulatory lubricated drilling tool described in the present application, a partition for separating the driving member and the lubricating oil is provided in the shell, and a plurality of anti-rotation rods are provided on the partition, and the anti-rotation rods cooperate with the branch stem to limit the position.

[0018] In the circulatory lubricated drilling tool described in the present application, a partition for separating the driving member and the lubricating oil is provided in the shell, and a plurality of anti-rotation rods are provided on the partition, and the anti-rotation rods cooperate with the branch stem to limit the position.

[0019] In the circulatory lubricated drilling tool described in the present application, the shell has an oil outlet hole connected to the oil outlet cavity, and the inner wall of the shell has a first rubber film that opens the oil outlet hole when squeezed by lubricating oil.

[0020] In the circulatory lubricated drilling tool described in the present application, the shell has an oil return hole connected to the oil return chamber, and the inner wall of the shell has a second rubber film that opens the oil return hole when squeezed by lubricating oil.

[0021] In the circulatory lubricated drilling tool described in the present application, the circulating lubrication device further includes a temperature monitor, and a temperature measuring probe of the temperature monitor passes through the partition plate and enters the oil return chamber.

[0022] In the circulatory lubricated drilling tool according to the present application, the circulating lubrication device further comprises a controller connected to the temperature monitor signal, and the controller adjusts the output shaft rotation speed of the driving member according to the lubricating oil temperature fed back by the temperature monitor.

[0023] In the circulatory lubricated drilling tool described in the present application, the control program of the controller is to divide the temperature detected by the corresponding temperature detector into three levels: low temperature, medium temperature and high temperature. When the temperature detector feedback is low temperature, the controller stops the operation of the driving member; when the temperature detector feedback is medium temperature, the controller controls the output shaft of the driving member to rotate to start lubricating the lubricating oil in the ball bearing; when the temperature detector feedback is high temperature, the controller controls the output shaft of the driving member to rotate at the highest speed.

[0024] In the circulatory lubricated drilling tool described in the present application, a filter element for filtering lubricating oil in the reflux channel is detachably provided on the support leg.

[0025] Further objectives and advantages of the present application will be fully reflected through understanding of the following description and drawings.

[0026] These and other objects, features and advantages of the present application are fully reflected in the following detailed description, drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a three-dimensional diagram of the drilling tool with circulating lubrication according to the present application.

[0028] Figure 2 for Figure 1 Cross-sectional view of a drilling tool with recirculating lubrication.

[0029] Figure 3 for Figure 2 Magnified view of area A.

[0030] Figure 4 for Figure 2 A three-dimensional view of the medium-circulation lubrication device.

[0031] Figure 5 for Figure 4 Cross-sectional view of a medium-circulation lubrication device.

[0032] Figure 6 for Figure 4 Exploded view of a medium circulation lubrication unit.

[0033] Figure 7 for Figure 4 Exploded view of the medium-circulation lubrication device from another perspective. DETAILED DESCRIPTION

[0034] The terms and words used in the following specification and claims are not limited to the literal meanings, but are merely used by the applicant to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustration purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0035] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0036] Although ordinals such as "first," "second," and the like will be used to describe various components, those components are not limited herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component without departing from the teachings of the present application. The term "and / or" as used herein includes any and all combinations of one or more associated listed items.

[0037] The terms used herein are only used for the purpose of describing various embodiments and are not intended to be limiting. As used herein, singular forms are intended to include plural forms, unless the context clearly indicates an exception. It will also be understood that the terms "comprising" and / or "having" when used in this specification specify the presence of the described features, numbers, steps, operations, components, elements, or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.

[0038] The following examples are used to describe the drilling tool capable of cyclic lubrication in this application in detail:

[0039] Reference Manual Attached Figure 1 To Attachment Figure 7 , a circulatively lubricated drilling tool according to one embodiment of the present application is illustrated;

[0040] Referring to the attached drawings, the utility model discloses a drilling tool with circulating lubrication, which realizes circulating lubrication of the bearing balls 23 in the cone 20 drill bit, thereby reducing the bearing wear in the cone 20 drill bit, improving the service life of the cone 20 drill bit, and maintaining the working efficiency of the cone 20 drill bit during operation. At the same time, lubrication by circulating lubricating oil can also realize circulating cooling of the bearing balls 23. Specifically, the drilling tool with circulating lubrication includes a drill bit body 10, a support leg 11, a cone 20 inlaid with alloy teeth 21, and a detachable circulating lubrication device 30 located on the support leg 11.

[0041] Specifically, there are three legs 11, and the three legs 11 are arranged at equal intervals along the circumferential direction. The three legs 11 are part of the drill body 10 and are integrated into one body. The legs 11 are rotatably arranged on the legs 11. A first magnetic component 22 is embedded in the cone 20, and the first magnetic component 22 is fixed inside the cone 20. A second magnetic component 12 is embedded in the legs 11, and the magnetism of the first magnetic component 22 and the second magnetic component 12 are opposite. The bearing ball 23 is located between the first magnetic component 22 and the second magnetic component 12, and the bearing ball 23 is a high-strength antimagnetic round ball 121. Three-quarters of the round ball 121 is embedded at the top position of the leg 11, and the round ball 121 is in contact with the top of the cone 20, which maintains the stability of the rotation of the cone 20.

[0042] Furthermore, an oil inlet channel 111 and an oil return channel 112 are provided on the support leg 11. The oil outlet end of the oil inlet channel 111 is connected to the space where the bearing ball 23 is located. The lubricating oil enters the space where the bearing ball 23 is located from the oil inlet channel 111. The oil return channel 112 is adjacent to the oil inlet channel 111. The oil inlet end of the oil return channel 112 is connected to the space where the bearing ball 23 is located. The oil return channel 112 is generally an L-shaped structure. A filter 13 is provided at the corner position of the oil return channel 112. The filter 13 is used to filter the lubricating oil, maintain the cleanliness of the inside of the bearing during operation, reduce the wear of the bearing ball 23, and increase the service life of the bearing ball 23.

[0043] Specifically, the filter 13 is a tubular structure, which is screwed into the support leg 11 through a thread on one side, and a filter hole 131 is provided at the top of the filter 13. The filter 13 is a round tube except for the top. After the lubricating oil is filtered, the filter residue is gathered at the tail of the filter 13. When cleaning the filter residue, it is only necessary to take out the filter 13 and clean it.

[0044] like Figure 2-Figure 3 As shown, a mounting cavity is provided on the support leg 11, and the mounting cavity is used to install a circulating lubricating device 30. The circulating lubricating device 30 includes a housing 31, a piston and a driving member 34, and the housing 31 is a metal shell. A joint 33 is flexibly connected at the top position of the housing 31, and the outer wall of the joint 33 has an external thread, and the joint 33 is used to be threadedly connected with the inner wall of the mounting cavity. The end of the joint 33 has a hexagonal rotating portion 331, and the rotating portion 331 is used for a wrench to rotate the joint 33, so as to realize the detachable fixation of the circulating lubricating device 30 to the mounting cavity. A cover 32 is screwed on the bottom of the housing 31, and the cover 32 seals the bottom of the housing.

[0045] like Figure 4-Figure 7 As shown, a partition 37 is provided on the top of the shell 31, and the partition 37 is welded to the inner wall of the shell 31, thereby dividing the shell 31 into a first cavity and a second cavity, and the driving member 34 is installed in the first cavity. The driving member 34 is a servo motor, and the lower end of the output shaft 341 of the driving member 34 is a screw rod, and the output end of the driving member 34 passes through the partition 37 and enters the second cavity. Four fixing parts 372 with a Y-shaped cross-section are provided on the inner wall of the shell 31, and the four fixing parts 372 fix the driving member 34. An energy storage device is provided in the first cavity, and the energy storage device is a battery. The energy storage device is used to supply power to the driving member 34, so as to keep the driving member 34 working.

[0046] Specifically, the second cavity is divided into an oil outlet cavity 300 and an oil return cavity 301 by the piston, and an oil outlet hole 312 is provided on the inner wall of the oil outlet cavity 300, and the oil outlet hole 312 is connected to one end of the oil inlet channel 111, and the lubricating oil in the oil return cavity 301 is pumped into the oil inlet channel 111 through the oil outlet hole 312 under the pressure of the piston. An oil return hole 311 is provided on the inner wall of the oil return cavity 301, and the lubricating oil in the oil return channel 112 is squeezed by the lubricating oil entering the oil inlet channel 111 and enters the oil outlet cavity 300 through the oil return channel 112.

[0047] The piston is a rubber piston, which includes a piston body 38 and a one-way flipping movable leaf 382. The piston body 38 is a bottom-type rubber body, and the upper part is a metal ring structure. The middle part of the piston body 38 is designed with a round hole, and the lubricating oil can pass through the inside of the round hole 381 of the piston body 38. The movable leaf 382 can only flip in one direction. When the piston moves toward the oil return chamber 301, the lubricating oil in the oil return chamber 301 pushes back to open the movable leaf 382, ​​so that the lubricating oil in the oil return chamber 301 can enter the oil outlet chamber 300. Three arc-shaped branches 383 are arranged on the piston body 38, and the top ends of the three branches 383 gather at one place, and a disc-shaped connecting part 384 is formed at this position. The middle of the connecting part 384 has an opening, and the inner wall of the opening has an internal thread. The lower end of the output rod of the driving member 34 is screwed to the inner wall of the opening.

[0048] Specifically, a stop rod 371 is provided at the lower end of the partition 37, and the stop rod 371 interacts with the branch 383 to form a limit on the piston, thereby limiting the rotation of the piston and keeping the piston from moving up and down. Therefore, when the output shaft 341 of the driving member 34 rotates back and forth, the piston moves up and down, and then the lubricating oil is pumped to the bearing kinematic pair for circulating lubrication.

[0049] Furthermore, a first rubber film 3121 is provided on the inner wall of the oil outlet hole 312. The first rubber film 3121 is provided with a cutout similar to a triangular rhombus. When the lubricating oil in the oil outlet cavity 300 is squeezed, the first rubber film 3121 will open, and the lubricating oil will flow out of the oil outlet hole 312. When not squeezed, the first rubber film is closed to close the oil outlet hole 312. Similarly, a second rubber film 3111 is provided on the inner wall of the oil return hole 311. The structure of the second rubber film 3111 is the same as that of the first rubber film 3121, and it also has a triangular rhombus cutout. The lubricating oil in the oil return channel 112 can squeeze the second rubber film 3111, so that the lubricating oil enters the oil return cavity 301.

[0050] Specifically, a temperature monitor 39 is provided in the first cavity, and a temperature probe of the temperature monitor 39 penetrates into the oil return cavity 301, thereby monitoring the oil temperature in the oil return cavity 301. A controller 35 is also provided in the first cavity, and the controller 35 is electrically connected to the temperature monitor 39. The controller 35 controls the rotation rate of the driving member 34 through a control program, thereby adjusting the efficiency of the lubricating oil circulation, and further adjusting the internal temperature of the bearing.

[0051] Specifically, the controlled program is that the temperature monitor 39 detects the temperature of the lubricating oil in the oil return chamber 301, and feeds back the detected temperature to the controller 35. After receiving the corresponding temperature, the controller 35 adjusts the rotation rate of the output shaft 341 of the driving member 34. The control program of the controller 35 is divided into three intervals according to the temperature detected by the temperature detector, namely low temperature, medium temperature and high temperature. When the temperature detected by the temperature detector is low temperature, the driving member 34 stops working, thereby ensuring that the lubricating oil can be heated up quickly and improving the lubricating effect of the lubricating oil on the bearing. When the temperature detector detects that the temperature of the lubricating oil is medium temperature, the controller 35 controls the driving member 34 to work, realize the circulation of the lubricating oil, and cool down the bearing. When the temperature detected by the temperature detector is high temperature, the controller 35 controls the output shaft 341 of the driving member 34 to rotate at the highest speed, realizing rapid circulation and cooling of the lubricating oil.

[0052] The above is only the preferred embodiment of the utility model, and does not impose any formal restrictions on the shape, material and structure of the utility model. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model still falls within the scope of the technical solution of the utility model.

[0053] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

Claims

1. A drilling tool capable of circulating lubrication, characterized in that: The drill bit comprises a drill body, a support foot integrated on the drill body, a cone with alloy teeth, a ball bearing for connecting the cone and the support foot, and a detachable circulating lubricating device located on the support foot, wherein the circulating lubricating device is associated with the ball bearing to lubricate the balls in the ball bearing; The support leg is provided with an oil inlet channel and an oil return channel which are connected with the space where the ball is located; Among them, the circulating lubrication device includes a shell, a piston for lubricating oil to pass through in one direction, and a driving member whose output shaft can rotate forward and reversely. The piston divides the interior of the shell into an oil outlet chamber and an oil return chamber. The driving member drives the piston to squeeze the lubricating oil in the oil outlet chamber into the oil inlet channel, and the lubricating oil in the ball bearing flows back to the oil return chamber through the oil return channel at the same time.

2. A cyclically lubricated drilling tool according to claim 1, characterized in that: The piston comprises a piston body and a movable leaf which is arranged on the piston body and can be turned unidirectionally. The piston body is provided with a circular hole for lubricating oil to pass through. The movable leaf blocks the circular hole when the piston squeezes out the lubricating oil in the oil cavity.

3. A cyclically lubricated drilling tool according to claim 2, characterized in that: A plurality of arc-shaped branches are arranged on the piston body, a connecting portion with an internal threaded hole is arranged on the top of the plurality of branches, and the output shaft of the driving member is threadedly connected with the connecting portion.

4. A cyclically lubricated drilling tool according to claim 3, characterized in that: A partition for separating the driving member and the lubricating oil is arranged in the shell, and a plurality of anti-rotation rods are arranged on the partition, and the anti-rotation rods cooperate with the branch stems to limit the position.

5. A circulatively lubricated drilling tool according to claim 1, characterized in that: The shell is provided with an oil outlet hole communicated with the oil outlet cavity, and the inner wall of the shell is provided with a first rubber film which opens the oil outlet hole when being squeezed by lubricating oil.

6. A circulatively lubricated drilling tool according to claim 1, characterized in that: The housing is provided with an oil return hole communicated with the oil return chamber, and the inner wall of the housing is provided with a second rubber film which opens the oil return hole when being squeezed by lubricating oil.

7. A circulatively lubricated drilling tool according to claim 4, characterized in that: The circulating lubrication device also includes a temperature monitor, and a temperature measuring probe of the temperature monitor passes through the partition plate and enters the oil return chamber.

8. A circulatively lubricated drilling tool according to claim 7, characterized in that: The circulating lubrication device further comprises a controller connected to the temperature monitor signal, and the controller adjusts the output shaft rotation speed of the driving member according to the lubricating oil temperature fed back by the temperature monitor.

9. A circulatively lubricated drilling tool according to claim 8, characterized in that: The control program of the controller is to divide the temperature detected by the corresponding temperature detector into three levels: low temperature, medium temperature and high temperature. When the temperature detector feedback is low temperature, the controller stops the operation of the driving part; when the temperature detector feedback is medium temperature, the controller controls the output shaft of the driving part to rotate to start lubricating the lubricating oil in the ball bearing; when the temperature detector feedback is high temperature, the controller controls the output shaft of the driving part to rotate at the highest speed.

10. The circulatory lubricated drilling tool according to claim 1, characterized in that: The support foot is detachably provided with a filter element for filtering the lubricating oil in the reflux channel.

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