Protection device of advance drill bit

Abstract

The utility model discloses a protection device of an advance drill bit, which comprises the advance drill bit, a monitoring sensor is arranged in the advance drill bit, the protection device further comprises a fixing sleeve, the fixing sleeve is sleeved outside the advance drill bit, the advance drill bit is connected with the fixing sleeve through a flange, and the advance drill bit penetrates through the fixing sleeve from top to bottom. A plurality of first cones are arranged at the bottom end of the fixed sleeve; the advance drill bit is sleeved with the protection pipe, the protection pipe is arranged in the fixing sleeve in a telescopic mode, an avoiding hole is formed in the bottom end of the protection pipe, and a plurality of second cones are arranged at the bottom end of the protection pipe; one end of the spring is connected with a hook fixed on the protection tube, the other end of the spring is connected with a hook fixed on the top wall in the fixed sleeve, and when the spring is not compressed, one end of the protection tube is exposed out of the fixed sleeve and wraps the advance drill bit. Therefore, under the conditions of hole collapse and lateral stress extrusion, the advanced drill bit sleeve can be protected, and the situation that the drill bit is damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation construction, in particular to a protection device for an advanced drill bit. Background Art

[0002] In foundation construction, the current drill bit protection method (advanced drill bits for cement-soil mixing piles) is to prevent wear and damage to the drill bit through preventive measures. Specifically, the drill bit is improved by installing various sensors and other devices inside the drill bit to monitor its operating parameters. When the monitoring results indicate that the drill bit parameters are overloaded, appropriate measures are taken to prevent damage to the drill bit. The implementation details include: installing a temperature sensor inside the drill bit, opening a hole in the side wall of the drill bit, and connecting a water pipe to the hole in the side wall. The sensor senses the drill bit temperature, and when the temperature is too high, the corresponding water spray holes spray water to cool the drill bit.

[0003] Such protective measures are mainly focused on the prevention stage. When facing direct events such as lateral stress extrusion, drilling in hard rock formations, and hole collapse, there is a lack of corresponding safeguards. The complex and changeable construction environment often poses a direct and severe impact on the drill bit and drill rod, thereby accelerating the wear of the drill bit and the damage process of the drill bit and drill rod. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] Therefore, one purpose of the present invention is to provide a protective device for an advanced drill bit.

[0006] To achieve the above-mentioned object, the utility model proposes a protection device for an advance drill bit, comprising an advance drill bit, wherein the advance drill bit has a built-in monitoring sensor, and further comprising: a fixed sleeve, wherein the fixed sleeve is sleeved on the outside of the advance drill bit, the advance drill bit and the fixed sleeve are connected by a flange, and the advance drill bit passes through the fixed sleeve from top to bottom, and a plurality of first cones are provided at the bottom end of the fixed sleeve; a protection tube, wherein the protection tube is sleeved on the outside of the advance drill bit and the protection tube is retractably arranged in the fixed sleeve, an avoidance hole is opened at the bottom end of the protection tube, and a plurality of second cones are provided at the bottom end of the protection tube; a spring, wherein one end of the spring is connected to a hook fixed on the protection tube, and the other end of the spring is connected to a hook fixed on the inner top wall of the fixed sleeve, when the spring is not compressed, one end of the protection tube is exposed from the fixed sleeve and covers the advance drill bit, and when the spring is compressed to an extreme state, the advance drill bit is exposed from the protection tube through the avoidance hole;

[0007] A stirring blade group is fixedly connected to the outer wall of the fixed sleeve.

[0008] In addition, the protective device for the advanced drill bit proposed in the application may also have the following additional technical features:

[0009] Specifically, when the spring is compressed to an extreme state, the bottom of the protection tube is flush with the bottom of the fixing sleeve.

[0010] Specifically, the top of the fixed sleeve is in the shape of a circular flange, and the top and bottom ends of the fixed sleeve are respectively provided with corresponding second through holes and first through holes; the top of the advance drill bit is fixedly connected with a flange, and the flange is fixed to the top of the fixed sleeve by threaded fasteners; the advance drill bit passes through the second through hole and the first through hole from top to bottom.

[0011] Specifically, the second through hole, the first through hole, the avoidance hole, the fixed sleeve, the protective tube and the advance drill bit are located on the same axial line.

[0012] Specifically, a third through hole is opened at the top end of the protection tube, and the third through hole covers the outside of the advance drill bit.

[0013] Specifically, the protection tube is T-shaped, and the diameter of the top end of the protection tube is larger than the diameter of the first through hole, and the diameter of the protection tube body matches the diameter of the first through hole.

[0014] Specifically, a plurality of slide grooves distributed in a circular array are provided inside the fixed sleeve, and a plurality of grooves distributed in a circular array are provided on the outer wall of the top end of the protective tube. The plurality of grooves are arranged in a one-to-one correspondence with the plurality of slide grooves, and rotating balls are provided between the grooves and the corresponding slide grooves, and the diameters of the grooves and the slide grooves match the diameter of the balls.

[0015] Specifically, the stirring blade group may be a plurality of groups, and the stirring blade group includes a plurality of stirring blades arranged in a circumferential array, and each stirring blade is fixed on the outer wall of the fixed sleeve.

[0016] Specifically, there may be a plurality of springs, and the plurality of springs are distributed in a circular array.

[0017] Specifically, the plurality of first cones and the plurality of second cones are distributed in a circular array, and the first cones and the second cones are identical.

[0018] The technical solution provided by the embodiment of the utility model has the following advantages compared with the prior art:

[0019] (1) When faced with the situation of hole collapse and lateral stress extrusion, the operator will slightly lift the drill rod after discovering it. At this time, the protective tube will quickly pop out from the fixed casing under the action of the spring after extrusion, and the advanced drill bit will be put into the tube for protection to avoid damage to the drill bit.

[0020] (2) When the advance drill bit is inserted into the pipe, the first cone and the second cone at the bottom of the fixed casing and the protective pipe replace the advance drill bit in the drilling and grinding work on the hard soil and rock layers, which can not only reduce the loss of the advance drill bit, but also ensure the operation of the drilling work.

[0021] (3) By setting up a stirring blade group, the soil can be stirred when the drill bit is drilling, which reduces the overall strength of the soil, distributes the friction force that the lead drill bit bears during the soil drilling process, and reduces the torque force that the lead drill bit is subjected to during the drilling process, thereby reducing the risk of drill rod breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 Schematic diagram of the structure of a protection device for an advanced drill bit according to one embodiment of the present utility model;

[0025] Figure 2 This is a schematic top view of the protective tube according to one embodiment of the present invention;

[0026] Figure 3 This is a bottom view of the structure of a protective device for an advanced drill bit according to another embodiment of the present utility model.

[0027] As shown in the figure: 1. Fixed sleeve; 2. Advance drill bit; 3. Protective tube; 4. Spring; 5. Mixing blade group; 6. Ball; 7. First cone; 8. Second cone; 9. Hook; 10. First through hole; 11. Second through hole; 12. Slide; 21. Flange; 30. Avoidance hole; 31. Groove; 32. Third through hole. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] The following describes the protective device for the advanced drill bit according to the embodiment of the present invention in conjunction with the accompanying drawings.

[0031] The protective device for the advanced drill bit provided in the embodiment of the utility model can be connected to the drill rod of an external pile driver.

[0032] like Figure 1 and Figure 3 As shown, the protection device for the advance drill bit of the embodiment of the present utility model may include an advance drill bit 2, and the advance drill bit 2 has a built-in monitoring sensor.

[0033] It should be noted that the monitoring sensor described in this embodiment may be a temperature sensor, a force sensor, etc. The temperature sensor is used to detect the temperature of the advance drill bit 2, the force sensor is used to obtain the friction force of the advance drill bit 2, and the monitoring sensor is communicatively connected to the on-board display terminal in the external pile driver. The on-board display terminal in the pile driver is used to display various data information transmitted by the monitoring sensor, and the advance drill bit 2 is detachably connected to the drill rod of the external pile driver. Since the above is the existing technology, no further details will be given here.

[0034] It also includes: a fixed sleeve 1, which is sleeved on the outside of the advance drill bit 2. The advance drill bit 2 and the fixed sleeve 1 are connected by a flange, and the advance drill bit 2 passes through the fixed sleeve 1 from top to bottom. A plurality of first cones 7 are provided at the bottom end of the fixed sleeve 1.

[0035] The protective tube 3 is sleeved on the outside of the advance drill bit 2, and the protective tube 3 is telescopically arranged in the fixed sleeve 1. An avoidance hole 30 is opened at the bottom end of the protective tube 3, and a plurality of second cones 8 are provided at the bottom end of the protective tube 3. It can be understood that the avoidance hole 30 can ensure that the protective tube 3 will not be restricted by the advance drill bit 2 when it moves up and down.

[0036] Spring 4, one end of the spring 4 is connected to the hook 9 fixed on the protective tube 3, and the other end of the spring 4 is connected to the hook 9 fixed on the inner top wall of the fixed sleeve 1. When the spring 4 is not compressed, one end of the protective tube 3 is exposed from the fixed sleeve 1 and covers the advance drill bit 2. When the spring 4 is compressed to the limit state, the advance drill bit 2 is exposed from the protective tube 3 through the avoidance hole 30.

[0037] It should be noted that when the spring 4 is uncompressed, it means that the spring 4 is in its initial state, and when the spring 4 is compressed to its limit state, it means that the spring 4 has been deformed to the maximum limit allowed by the design under the action of external pressure, and the spring coils of the spring 4 are tightly stacked together and cannot be further compressed.

[0038] The stirring blade group 5 is fixedly connected to the outer wall of the fixed sleeve 1.

[0039] Specifically, in the initial state, the spring 4 is in a naturally relaxed state. Due to the free extension of the spring 4, one end of the protection tube 3 is exposed from the fixed sleeve 1 and covers the advanced drill bit 2 for protection.

[0040] As the drilling operation begins, the pile driver starts, and the drill rod sinks and rotates. When it sinks to a certain position (that is, the protective tube 3 contacts the ground), the protective tube 3 is subjected to the reaction force of the drilling ground and gradually retreats into the fixed casing 1. The advanced drill bit 2 exposes the protective tube 3 and starts drilling into the soil.

[0041] As the drilling progresses, when the spring 4 is compressed to the limit state, the protective tube 3 stops retracting, and the first cone 7 at the bottom of the fixed casing 1 begins to grind and destroy the soil, and then the mixing blade group 5 also assists in destroying the soil, which plays a role in pre-treating the soil around the advance drill bit 2, reducing the torque exerted on the advance drill bit 2 during the drilling process, and assisting the drill rod in drilling, thereby increasing the service life of the advance drill bit 2.

[0042] When there is a large difference in strength of the stratum from "soft to hard" (drilling into a hard rock stratum, or encountering a boulder), or when there is a sudden change in lateral stress due to hole collapse, the friction of the advance drill bit 2 is too large, and the instantaneous torque increases. The monitoring sensor built into the advance drill bit 2 sends data to the on-board display terminal in the pile driver, and the monitoring system in the on-board display terminal sends an alarm. The operator (operator) then slightly lifts the drill rod to operate. At this time, the protection tube 3 is quickly ejected under the action of the post-extrusion spring 4, and the advance drill bit 2 is inserted into the tube for protection. , and the first cone 7 and the second cone 8 at the bottom of the fixed casing 1 and the protective tube 3 replace the advanced drill bit 2 in the drilling and grinding work of the hard soil layer and rock layer, reducing the loss of the advanced drill bit 2. At the same time, the first cone 7 and the second cone 8 and the mixing blade group 5 complete the grinding and mixing of the hard rock layer or isolated rock, or complete the mixing treatment after the collapsed hole. After the local layer is crushed and softened, the operator can control the drill rod to sink, and the advanced drill bit 2 is exposed to resume drilling, thereby achieving the purpose of actively protecting the advanced drill bit 2 and avoiding damage to the advanced drill bit 2.

[0043] Furthermore, when the spring 4 is compressed to the limit state, the bottom of the protection tube 3 is flush with the bottom of the fixed sleeve 1 .

[0044] Among them, it can be understood that, through the above arrangement, when the spring 4 is compressed to the limit state, the first cone 7 and the second cone 8 can also reach a flush position, which can expand the grinding area of the soil, thereby improving the grinding efficiency and reducing the torque exerted on the lead drill bit 2 during the drilling process, thereby assisting the drill rod in drilling.

[0045] In one embodiment of the present invention, Figure 1 As shown, the top end of the fixing sleeve 1 is in the shape of a circular flange, and the top end and the bottom end of the fixing sleeve 1 are respectively provided with a corresponding second through hole 11 and a first through hole 10 .

[0046] It can be understood that the second through hole 11 and the first through hole 10 are provided to facilitate installation of the advance drill bit 2 and penetration of the fixed casing 1 .

[0047] The top of the advance drill bit 2 is fixedly connected to a flange 21 , and the flange 21 is fixed to the top of the fixed sleeve 1 through threaded fasteners. The advance drill bit 2 passes through the second through hole 11 and the first through hole 10 from top to bottom.

[0048] It should be noted that the threaded fastener described in this example can be a combination of a bolt and a nut or a self-locking screw, which facilitates the disassembly or fixation of the advance drill bit 2. The operation is simple and convenient, and can greatly improve the assembly efficiency between the advance drill bit 2 and the fixed casing 1.

[0049] In one embodiment of the present invention, Figure 1 As shown, the second through hole 11, the first through hole 10, the avoidance hole 30, the fixed sleeve 1, the protective tube 3 and the advance drill bit 2 are located on the same axial line.

[0050] Among them, it can be understood that by being on the same axial line as above, the advance drill bit 2, the fixed casing 1 and the protective tube 3 can maintain balance when subjected to force, reducing the additional moment and torsion caused by eccentric force, and helping to reduce the wear and damage of the advance drill bit 2. At the same time, the arrangement of the coaxial centerline can also minimize the vibration and deviation caused by different axes, thereby ensuring the accuracy of the movement trajectory of the advance drill bit 2 and improving the straightness and position accuracy of the drilling.

[0051] In one embodiment of the present invention, Figure 1 As shown, a third through hole 32 is opened at the top of the protection tube 3 , and the third through hole 32 covers the outside of the advance drill bit 2 .

[0052] Among them, it can be understood that by setting the third through hole 32, not only the convenience of installing the advance drill bit 2 can be improved, but also the third through hole 32 can be used to slide on the advance drill bit 2 to limit the protective tube 3, thereby ensuring that the protective tube 3 moves along the established up and down path coaxial with the advance drill bit 2, effectively avoiding deviation or shaking, and ensuring the stability and reliability of the protective tube 3 when moving up and down.

[0053] In one embodiment of the present invention, Figure 1 As shown, the protection tube 3 is T-shaped, and the top diameter of the protection tube 3 is larger than the diameter of the first through hole 10 , and the diameter of the protection tube 3 matches the diameter of the first through hole 10 .

[0054] It can be understood that the larger diameter portion at the top of the protection tube 3 will become a barrier, ensuring that the protection tube 3 will not be easily pulled out or separated from the restraint of the fixed sleeve 1 in the axial direction, greatly enhancing the safety and reliability of the protection device of the advanced drill bit, and reducing the risk of operation interruption or damage due to component falling off.

[0055] Secondly, the diameter of the tube body of the protective tube 3 matches the diameter of the first through hole 10, ensuring a tight fit and smooth sliding between the two. When the protective tube 3 moves, it can operate along the coaxial centerline path without worrying about jamming or wear problems caused by size mismatch.

[0056] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, a plurality of circular array-distributed slide grooves 12 are provided inside the fixed sleeve 1, and a plurality of circular array-distributed grooves 31 are provided on the top outer wall of the protective tube 3. The plurality of grooves 31 are arranged in a one-to-one correspondence with the plurality of slide grooves 12. Rotating balls 6 are provided between the grooves 31 and the corresponding slide grooves 12, and the diameters of the grooves 31 and the slide grooves 12 match the diameter of the balls 6.

[0057] Specifically, the groove 31 is provided to cooperate with the slide groove 12 to limit the ball 6. At the same time, the ball 6 can be used to limit the protective tube 3, which not only ensures the position and shape of the protective tube 3 in the fixed sleeve 1, but also ensures the stability of the fixed sleeve 1 when the protective tube 3 is rotated by the ball 6. At the same time, the smoothness of the rolling of the ball 6 is utilized to greatly reduce the friction resistance and improve the smoothness of the protective tube 3 when it needs to move up and down.

[0058] In one embodiment of the present invention, Figure 1 As shown, there may be multiple stirring blade groups 5 , and the stirring blade group 5 includes a plurality of stirring blades arranged in a circumferential array, and each stirring blade is fixed on the outer wall of the fixed sleeve 1 .

[0059] Specifically, the stirring blade groups 5 can be arranged in multiple groups, such as 2 or 3 groups, depending on the soil conditions and stirring requirements. Each stirring blade group 5 includes multiple stirring blades, and the number of stirring blades in each stirring blade group 5 can be 2 or 3, etc., depending on the actual situation. The configuration of multiple stirring blade groups 5 greatly improves the ability and efficiency of soil destruction. During operation, the stirring blades in each group work together to form a powerful crushing and stirring ability, which can quickly and thoroughly destroy and stir the soil, thereby alleviating the friction and torque experienced by the lead drill bit 2 during the drilling process.

[0060] Furthermore, the circular array of mixing blades ensures uniform force during mixing. This arrangement allows each mixing blade to evenly bear the load during operation, avoiding local wear or damage caused by uneven force, and further improving the stability and durability of the overall structure.

[0061] In one embodiment of the present invention, Figure 1 As shown, there can be multiple springs 4, and the multiple springs 4 are distributed in a circular array.

[0062] It is understood that the multiple springs 4 can improve the timeliness and response speed of the protective tube 3 when it is ejected. When encountering an obstacle or needing to protect the lead drill bit 2, the multiple springs 4 can function almost simultaneously, providing a balanced and powerful thrust to the protective tube 3, ensuring that it ejects quickly and accurately into place, effectively preventing damage to the lead drill bit 2.

[0063] Secondly, the multiple springs 4 also provide position-limiting support for the protective tube 3. During operation, the protective tube 3 must withstand complex forces and impacts from soil, rock, and other media. The even distribution and coordinated operation of the multiple springs 4 provide more stable and comprehensive support for the protective tube 3, reducing vibration and deflection caused by uneven force, thereby ensuring operational stability and accuracy. The number of springs 4 can be two, three, or four, depending on actual conditions.

[0064] In one embodiment of the present invention, Figure 1 As shown, the plurality of first cones 7 and the plurality of second cones 8 are distributed in a circular array, and the first cones 7 and the second cones 8 are identical.

[0065] It should be noted that, in this embodiment, the first cone 7 and the second cone 8 are identical in shape and size.

[0066] First, multiple first cones 7 and multiple second cones 8 are arranged in a circular array distribution, so that when the first cones 7 and the second cones 8 grind the soil, they can achieve uniform dispersion and transmission of force, avoid local stress concentration, and improve work efficiency. In addition, the first cones 7 and the second cones 8 are designed to be exactly the same, and when the spring 4 is compressed to the extreme state, the fixed sleeve 1 and the protective tube 3 can be flush, ensuring consistency and synchronization when grinding the soil, thereby improving the grinding efficiency of the soil.

[0067] In summary, the protection device of the advance drill bit in the embodiment of the utility model can protect the advance drill bit sleeve when facing the situation of hole collapse and lateral stress extrusion, thereby avoiding damage to the drill bit, and can use the first cone and the second cone to replace the advance drill bit in the drilling and grinding work of hard soil and rock layers when the advance drill bit is inserted into the pipe, which can not only reduce the loss of the advance drill bit, but also ensure the operation of the drilling work, and at the same time reduce the torque applied to the advance drill bit during drilling, thereby reducing the risk of drill rod breakage.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0069] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments described herein, but rather to be embodied in the broadest possible manner consistent with the principles and novel features disclosed herein.

Claims

1. A protection device for an advanced drill bit, comprising an advanced drill bit, wherein the advanced drill bit has a built-in monitoring sensor, characterized in that: Also includes: A fixed sleeve, wherein the fixed sleeve is sleeved on the outside of the advance drill bit, the advance drill bit and the fixed sleeve are connected via a flange, and the advance drill bit passes through the fixed sleeve from top to bottom, and a plurality of first cones are provided at the bottom end of the fixed sleeve; A protection tube, the protection tube being sleeved on the outside of the advance drill bit and being telescopically arranged in the fixed sleeve, the bottom end of the protection tube being provided with an avoidance hole, and the bottom end of the protection tube being provided with a plurality of second cones; a spring, one end of the spring being connected to a hook fixed on the protective tube, and the other end of the spring being connected to a hook fixed on the inner top wall of the fixed sleeve; when the spring is not compressed, one end of the protective tube is exposed from the fixed sleeve and covers the advance drill bit; when the spring is compressed to an extreme state, the advance drill bit is exposed from the protective tube through the avoidance hole; A stirring blade group is fixedly connected to the outer wall of the fixed sleeve.

2. The protection device for the advanced drill bit according to claim 1, characterized in that: When the spring is compressed to an extreme state, the bottom of the protection tube is flush with the bottom of the fixing sleeve.

3. The protection device for the advanced drill bit according to claim 2, characterized in that: The top end of the fixing sleeve is in the shape of a circular flange, and the top end and the bottom end of the fixing sleeve are respectively provided with a corresponding second through hole and a first through hole; The top end of the advanced drill bit is fixedly connected with a flange, and the flange is fixed to the top of the fixed sleeve through a threaded fastener; The advanced drill bit penetrates the second through hole and the first through hole from top to bottom.

4. The protection device for the advanced drill bit according to claim 3, characterized in that: The second through hole, the first through hole, the avoidance hole, the fixed sleeve, the protective tube and the advance drill bit are located on a common axis.

5. The protection device for the advanced drill bit according to claim 1, characterized in that: A third through hole is formed at the top of the protection tube, and the third through hole covers the outside of the advance drill bit.

6. The protection device for the advanced drill bit according to any one of claims 2-3, characterized in that: The protection tube is T-shaped, and the diameter of the top end of the protection tube is larger than the diameter of the first through hole. The diameter of the protection tube body matches the diameter of the first through hole.

7. The protection device for the advanced drill bit according to claim 1, characterized in that: The interior of the fixed sleeve is provided with a plurality of slide grooves distributed in a circular array, and the top outer wall of the protective tube is provided with a plurality of grooves distributed in a circular array. The plurality of grooves are arranged in a one-to-one correspondence with the plurality of slide grooves, and rotating balls are provided between the grooves and the corresponding slide grooves, and the diameters of the grooves and the slide grooves match the diameter of the balls.

8. The protection device for the advanced drill bit according to claim 1, characterized in that: The stirring blade group may be a plurality of groups, and the stirring blade group includes a plurality of stirring blades arranged in a circumferential array, and each stirring blade is fixed on the outer wall of the fixed sleeve.

9. The protection device for the advanced drill bit according to claim 1, characterized in that: There can be a plurality of springs, and the plurality of springs can be distributed in a circular array.

10. The protection device for the advanced drill bit according to claim 1, characterized in that: The plurality of first cones and the plurality of second cones are distributed in a circular array, and the first cones and the second cones are identical.

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