A drill bit nozzle with a self-locking anti-falling mechanism

Abstract

The present application relates to a drill bit nozzle with a self-locking anti-drop mechanism, belonging to the technical field of drill bits for oil and gas drilling, and comprising: a nozzle body, on the outer wall of which there is provided a receiving space for installing the self-locking anti-drop mechanism, the nozzle body being located in the water hole of the drill bit and detachably connected to the drill bit, and there being provided in the water hole an anti-drop clamping groove that is clamped with the self-locking anti-drop mechanism; a self-locking anti-drop mechanism, which includes a self-locking stopper rotatably connected in the receiving space, and one end of the self-locking stopper flips in a direction approaching the anti-drop clamping groove so that the self-locking stopper is clamped with the anti-drop clamping groove. The self-locking stopper of the present application flips in the receiving space under the action of its own gravity or under the action of an external force, and after the flipping is completed, the self-locking stopper is clamped in the anti-drop clamping groove in the water hole of the drill bit to achieve self-locking, preventing the drill bit nozzle from loosening and falling during the drilling operation, and improving the safety and reliability during the use of the drill bit nozzle.

Description

Technical Field

[0001] The present application relates to the technical field of drill bits for oil and gas drilling, and particularly relates to a drill bit nozzle with a self-locking anti-falling mechanism. Background Art

[0002] A drill bit is a rock-breaking tool used in drilling engineering to break rocks and form a wellbore. In addition to the cutting structure, the hydraulic structure on the drill bit also plays an important role in the rock-breaking efficiency and service life of the drill bit, namely, cooling the cutting teeth, cleaning the bottom of the well, transporting cuttings, assisting in rock breaking, etc. At present, the design of the hydraulic structure on the drill bit is to arrange nozzles or water holes at different positions on the drill bit body, and the drilling fluid or cooling medium in the internal flow channel is ejected through the nozzles or water holes to achieve the purpose of cleaning and cooling the cutting elements.

[0003] The nozzle of the drill bit is composed of a cemented carbide nozzle and a sealing ring. The two are installed as a whole in the water hole of the drill bit, and the nozzle and the water hole are fixed by threaded connection. For drill bits used for multiple trips into the well, the sealing ring of the nozzle may age, resulting in seal failure. The mud flushes the nozzle thread, further aggravating the erosion damage of the thread, and then causing the nozzle to fall into the well, leading to premature failure of the drill bit due to tooth breakage, seriously affecting the drilling efficiency and bringing potential safety hazards to the use of the drill bit. Therefore, it is necessary to improve the nozzle structure to improve its safety and reliability, and at the same time facilitate the repair and replacement of the drill bit. Summary of the Invention

[0004] An embodiment of the present application provides a drill bit nozzle with a self-locking anti-falling mechanism to solve the problems in the related art that the nozzle falling into the well causes premature failure of the drill bit due to tooth breakage, seriously affecting the drilling efficiency and bringing potential safety hazards to the use of the drill bit.

[0005] An embodiment of the present application provides a drill bit nozzle with a self-locking anti-falling mechanism, including:

[0006] A nozzle body, on the outer wall of which there is a receiving space for installing the self-locking anti-falling mechanism. The nozzle body is located in the water hole of the drill bit and is detachably connected to the drill bit. There is an anti-falling card slot in the water hole that is engaged with the self-locking anti-falling mechanism.

[0007] A self-locking anti-falling mechanism, which includes a self-locking block rotatably connected in the receiving space. One end of the self-locking block flips in a direction approaching the anti-falling card slot so that the self-locking block is engaged with the anti-falling card slot.

[0008] In some embodiments: the receiving space is a rectangular groove, and on both sides of the receiving space, there are rotatable shafts fixedly provided for connecting the self-locking block. On both sides of the self-locking block, there are mounting holes for connecting the rotatable shafts.

[0009] In some embodiments: an installation groove for installing the rotating shaft is formed on the outer wall of the nozzle body, the installation groove is located on both sides of the accommodation space, and one end of the rotating shaft away from the self-locking stopper is located in the installation groove and is welded to the installation groove.

[0010] In some embodiments: the self-locking stopper is of a rectangular structure, a counterweight is provided at the top of the self-locking stopper and offsets away from the anti-falling card slot, and the counterweight enables the bottom end of the self-locking stopper to be clamped with the anti-falling card slot.

[0011] In some embodiments: an elastic member for driving the top end of the self-locking stopper to offset away from the anti-falling card slot is arranged in the accommodation space, and the elastic member enables the bottom end of the self-locking stopper to be clamped with the anti-falling card slot.

[0012] In some embodiments: an unlocking hole extending into the accommodation space is formed at the bottom end of the nozzle body, and an unlocking rod extends into the unlocking hole to drive the self-locking stopper to flip away from the anti-falling card slot to disengage from the anti-falling card slot.

[0013] In some embodiments: the nozzle body is of a hollow cylindrical structure, an external thread for threadedly connecting with the drill bit is further arranged on the outer wall of the nozzle body, sealing rings for sealingly connecting with water holes are arranged at both the bottom and the top of the nozzle body, and a plurality of grooves are formed on the bottom surface of the nozzle body.

[0014] In some embodiments: the nozzle body is of a hollow cylindrical structure, the nozzle body is located in the water hole of the drill bit and is brazed and sealed with the drill bit, a first shoulder and a second shoulder with gradually increasing diameters are sequentially arranged on the outer wall of the nozzle body from top to bottom, and a first stepped hole and a second stepped hole for cooperating with the first shoulder and the second shoulder are respectively arranged in the water hole.

[0015] In some embodiments: a plurality of self-locking anti-falling mechanisms are provided, and the plurality of self-locking anti-falling mechanisms are arranged in a circumferentially uniform manner on the outer circumference of the nozzle body.

[0016] In some embodiments: the anti-falling card slot is an annular groove located in the water hole.

[0017] The beneficial effects brought by the technical solution provided by this application include:

[0018] The embodiment of the present application provides a drill bit nozzle with a self-locking anti-drop mechanism. Since the drill bit nozzle with a self-locking anti-drop mechanism of the present application is provided with a nozzle body, a receiving space for installing the self-locking anti-drop mechanism is opened on the outer wall of the nozzle body. The nozzle body is located in the water hole of the drill bit and is detachably connected to the drill bit. An anti-drop card slot that is engaged with the self-locking anti-drop mechanism is arranged in the water hole; a self-locking anti-drop mechanism, which includes a self-locking block rotatably connected in the receiving space. One end of the self-locking block flips in a direction approaching the anti-drop card slot so that the self-locking block is engaged with the anti-drop card slot.

[0019] Therefore, the drill bit nozzle with a self-locking anti-drop mechanism of the present application is provided with a self-locking anti-drop mechanism on the outer wall of the nozzle body to prevent the drill bit nozzle from falling out of the water hole of the drill bit. The self-locking anti-drop mechanism includes a self-locking block rotatably connected in the receiving space. One end of the self-locking block flips in a direction approaching the anti-drop card slot so that the self-locking block is engaged with the anti-drop card slot. The self-locking block flips in the receiving space under the action of its own gravity or under the action of an external force. After the self-locking block completes the flipping, it is engaged in the anti-drop card slot in the water hole of the drill bit to achieve self-locking, preventing the drill bit nozzle from loosening and falling during the drilling operation, and improving the safety and reliability of the drill bit nozzle during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the drill bit nozzle of the embodiment of the present application placed upright;

[0022] Figure 2 It is a schematic structural diagram of the nozzle body of the embodiment of the present application;

[0023] Figure 3 It is a schematic structural diagram of the self-locking block and the rotating shaft of the embodiment of the present application;

[0024] Figure 4 It is a schematic structural diagram of the self-locking block of the embodiment of the present application;

[0025] Figure 5 It is a schematic structural diagram of the drill bit nozzle in an inverted state in the water hole when the drill bit of the embodiment of the present application is in the drilling state;

[0026] Figure 6 It is a schematic structural diagram of the drill bit nozzle of another embodiment of the present application placed upright;

[0027] Figure 7 Structural schematic diagram of the nozzle body according to another embodiment of the present application;

[0028] Figure 8 Structural schematic diagram of the drill bit nozzle in an inverted state in the water hole when the drill bit is in the drilling state according to another embodiment of the present application.

[0029] Reference numerals:

[0030] 1. Nozzle body; 101. Groove; 102. External thread; 103. Water eye; 104. Accommodating space; 105. Installation groove; 106. Unlocking hole; 107. First shoulder; 108. Second shoulder; 109. Solder.

[0031] 2. Self-locking anti-falling mechanism; 201. Self-locking block; 202. Rotating shaft; 203. Installation hole; 3. Drill bit; 301. Water hole; 302. Anti-falling clamping groove; 4. Sealing ring. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0033] The embodiments of the present application provide a drill bit nozzle with a self-locking anti-falling mechanism, which can solve the problems in the related art that the nozzle falling into the well causes the premature failure of the drill bit teeth breakage, seriously affects the drilling efficiency, and brings potential safety hazards to the use of the drill bit.

[0034] See Figures 1 to 8 As shown, the embodiments of the present application provide a drill bit nozzle with a self-locking anti-falling mechanism, including:

[0035] A nozzle body 1, on the outer wall of which there is an accommodating space 104 for installing the self-locking anti-falling mechanism 2. The nozzle body 1 is located in the water hole 301 of the drill bit 3 and is detachably connected to the drill bit 3. There is an anti-falling clamping groove 302 in the water hole 301 that is engaged with the self-locking anti-falling mechanism 2. The anti-falling clamping groove is an annular groove located in the water hole 301.

[0036] A self-locking anti-falling mechanism 2, which includes a self-locking block 201 rotatably connected in the accommodating space 104. One end of the self-locking block 201 flips in the direction approaching the anti-falling clamping groove 302 so that the self-locking block 201 is engaged with the anti-falling clamping groove 302. There are multiple self-locking anti-falling mechanisms 2, and the multiple self-locking anti-falling mechanisms 2 are evenly arranged in a circumferential pattern on the outer circumference of the nozzle body 1.

[0037] In the drill bit nozzle with a self-locking anti-drop mechanism according to an embodiment of the present application, a self-locking anti-drop mechanism 2 for preventing the drill bit nozzle from falling out of the water hole 301 of the drill bit 3 is provided on the outer wall of the nozzle body 1. The self-locking anti-drop mechanism 2 includes a self-locking block 201 rotatably connected in the accommodation space 104. One end of the self-locking block 201 flips in a direction approaching the anti-drop slot 302 so that the self-locking block 201 is engaged with the anti-drop slot 302.

[0038] The self-locking block 201 flips in the accommodation space 104 under the action of its own gravity or under an external force. After the self-locking block 201 completes the flipping, it is engaged in the anti-drop slot 302 in the water hole 301 of the drill bit 3 to achieve self-locking, preventing the drill bit nozzle from loosening and falling during the drilling operation, and improving the safety and reliability during the use of the drill bit nozzle.

[0039] In some alternative embodiments: Refer to Figure 2 and Figure 7 As shown in, an embodiment of the present application provides a drill bit nozzle with a self-locking anti-drop mechanism. The accommodation space 104 of the drill bit nozzle is a rectangular groove, and the accommodation space 104 is not in communication with the water eye 103 in the nozzle body 1 to prevent the drilling fluid in the water eye 103 from damaging the self-locking anti-drop mechanism 2. Rotating shafts 202 for rotatably connecting the self-locking block 201 are fixedly provided on both sides of the accommodation space 104. Mounting holes 203 for rotatably connecting the rotating shafts 202 are provided on both sides of the self-locking block 201.

[0040] The positioning axes of the rotating shafts 202 on both sides of the self-locking block 201 are collinear. The self-locking block 201 is rotatably connected to the rotating shafts 202 through the mounting holes 203 on both sides so that the self-locking block 201 flips in the accommodation space 104. Mounting grooves 105 for mounting the rotating shafts 202 are provided on the outer wall of the nozzle body 1. The mounting grooves 105 are located on both sides of the accommodation space 104. One end of the rotating shaft 202 away from the self-locking block 201 is located in the mounting groove 105 and is welded to the mounting groove 105. The mounting grooves 105 on both sides of the accommodation space 104 are used to facilitate the installation and fixation of the rotating shafts 202, and the self-locking block 201 flips in the accommodation space 104 with the rotating shafts 202 as the support.

[0041] In some alternative embodiments: Refer to Figures 3 to 5 As shown in, an embodiment of the present application provides a drill bit nozzle with a self-locking anti-drop mechanism. The self-locking block 201 of the drill bit nozzle is of a rectangular structure. A counterweight is provided at the top of the self-locking block 201 and is offset in a direction away from the anti-drop slot 302. The counterweight and the self-locking block 201 form an "L" - shaped structure, and the counterweight makes the center of gravity of the self-locking block 201 located on the side close to the counterweight.

[0042] When the drill bit nozzle with the self-locking anti-drop mechanism 2 works at the bottom of the well, due to the center of gravity being on the side of the counterweight block in the self-locking anti-drop mechanism 2, under the action of gravity, one end of the self-locking block 201 equipped with the counterweight block flips into the accommodation space 104, and the other end opposite to it flips outwards from the accommodation space 104. The counterweight block enables the bottom end of the self-locking block 201 to be clamped with the anti-drop slot 302. When the self-locking block 201 flips under the action of gravity, one end of the self-locking block 201 close to the anti-drop slot 302 flips into the anti-drop slot 302 to achieve self-locking and play an anti-drop role.

[0043] In some alternative embodiments: The embodiment of the present application provides a drill bit nozzle with a self-locking anti-drop mechanism. An elastic member (not shown in the figure) for driving the top end of the self-locking block 201 to shift away from the anti-drop slot 302 is provided in the accommodation space 104 of the drill bit nozzle. The elastic member enables the bottom end of the self-locking block 201 to be clamped with the anti-drop slot 302. The elastic member is preferably but not limited to a helical spring. One end of the elastic member in the accommodation space 104 is connected to the self-locking block 201, and the other end is connected to the nozzle body 1. The elastic member forces the bottom end of the self-locking block 201 to be clamped with the anti-drop slot 302 by stretching or compressing, so as to achieve self-locking.

[0044] In some alternative embodiments: Refer to Figure 2 and Figure 7 As shown, the embodiment of the present application provides a drill bit nozzle with a self-locking anti-drop mechanism. An unlocking hole 106 extending into the accommodation space 104 is provided at the bottom end of the nozzle body 1 of the drill bit nozzle. When unlocking is required, an unlocking rod (such as a thin steel wire) is inserted into the unlocking hole 106 to drive the self-locking block 201 to flip away from the anti-drop slot 302 to disengage from the anti-drop slot 302, so as to achieve unlocking.

[0045] The drill bit nozzle of the embodiment of the present application can be detachably replaced and maintained after use. During disassembly, only need to insert the unlocking rod into the unlocking hole 106, and the unlocking rod reversely flips the self-locking block 201 to achieve unlocking (that is, the self-locking block 201 disengages from the anti-drop slot 302), and then remove the drill bit nozzle. The drill bit nozzle with the self-locking anti-drop mechanism of the present application improves the safety and reliability of the drill bit nozzle during use and avoids abnormal failure of the drill bit caused by the detachment of the drill bit nozzle.

[0046] In some alternative embodiments: Refer to Figure 1 and Figure 5As shown in the figure, an embodiment of the present application provides a drill bit nozzle with a self-locking anti-falling mechanism. The nozzle body 1 of the drill bit nozzle is a hollow cylinder structure. An external thread 102 for threaded connection with the drill bit 3 is further provided on the outer wall of the nozzle body 1. The nozzle body 1 is detachably and threadedly connected to the drill bit 3 through the external thread 102. Sealing rings 4 for sealing connection with the water holes 301 are provided at both the bottom and the top of the nozzle body 1. A plurality of grooves 101 are formed on the bottom surface of the nozzle body 1, and the plurality of grooves 101 are used for installing and disassembling the nozzle body 1 through a special tool.

[0047] Sealing rings 4 for sealing connection with the water holes 301 are provided at both the bottom and the top of the nozzle body 1. One sealing ring 4 is located below the accommodation space 104 of the nozzle body 1, close to the side of the groove 101, for sealing and protecting the self-locking anti-falling mechanism 2. The other sealing ring 4 is located above the external thread 102, on the side away from the groove 101, for sealing and protecting the external thread 102. The sealing ring 4 below the accommodation space 104 can effectively seal the drilling fluid and prevent the liquid from flowing back into the anti-falling slot 302 to erode and damage the self-locking anti-falling mechanism 2.

[0048] In some alternative embodiments: Refer to Figures 6 to 8 As shown in the figure, an embodiment of the present application provides a drill bit nozzle with a self-locking anti-falling mechanism. The nozzle body of the drill bit nozzle is a hollow cylinder structure. The nozzle body 1 is brazed and sealed with the drill bit 3 and is located in the water hole 301 of the drill bit 3. A brazing filler metal 109 is filled between the nozzle body 1 and the water hole 301 of the drill bit 3 for sealed connection. The outer wall of the nozzle body 1 is successively provided with a first shoulder 107 and a second shoulder 108 with gradually increasing diameters from top to bottom. A first stepped hole and a second stepped hole for cooperating with the first shoulder 107 and the second shoulder 108 are respectively provided in the water hole 301.

[0049] The first stepped hole and the first shoulder 107 cooperate with each other. On the one hand, it realizes the axial limit of the nozzle body 1 in the water hole 301. On the other hand, it blocks the seepage path of the drilling fluid between the nozzle body 1 and the water hole 301. The second stepped hole and the second shoulder 108 cooperate with each other. On the one hand, it realizes the axial limit of the nozzle body 1 in the water hole 301. On the other hand, the first shoulder 107 is brazed and sealed with the drill bit 3.

[0050] The drill bit nozzle of the embodiment of the present application can be detachably replaced and maintained after use. During disassembly, the brazing filler metal 109 between the nozzle body 1 and the water hole 301 is melted by heating. Then, the unlocking rod is inserted into the unlocking hole 106, and the unlocking rod is reversely flipped to unlock the self-locking block 201 (that is, the self-locking block 201 is disengaged from the anti-falling slot 302), and the drill bit nozzle is removed. The drill bit nozzle with a self-locking anti-falling mechanism of the present application improves the safety and reliability of the drill bit nozzle during use and avoids abnormal failure of the drill bit caused by the falling off of the drill bit nozzle.

[0051] Working principle

[0052] An embodiment of the present application provides a drill bit nozzle with a self-locking anti-dropping mechanism. Since the drill bit nozzle with a self-locking anti-dropping mechanism of the present application is provided with a nozzle body 1, a receiving space 104 for installing the self-locking anti-dropping mechanism 2 is opened on the outer wall of the nozzle body 1. The nozzle body 1 is located in the water hole 301 of the drill bit 3 and is detachably connected to the drill bit 3. An anti-dropping clamping groove 302 for clamping with the self-locking anti-dropping mechanism 2 is provided in the water hole 301; the self-locking anti-dropping mechanism 2, which includes a self-locking block 201 rotatably connected in the receiving space 104, and one end of the self-locking block 201 flips in a direction approaching the anti-dropping clamping groove 302 so that the self-locking block 201 is clamped with the anti-dropping clamping groove 302.

[0053] Therefore, the drill bit nozzle with a self-locking anti-dropping mechanism of the present application is provided with a self-locking anti-dropping mechanism 2 on the outer wall of the nozzle body 1 to prevent the drill bit nozzle from falling out of the water hole 301 of the drill bit 3. The self-locking anti-dropping mechanism 2 includes a self-locking block 201 rotatably connected in the receiving space 104, and one end of the self-locking block 201 flips in a direction approaching the anti-dropping clamping groove 302 so that the self-locking block 201 is clamped with the anti-dropping clamping groove 302. The self-locking block 201 flips in the receiving space 104 under the action of its own gravity or under an external force. After the self-locking block 201 completes the flipping, it is clamped in the anti-dropping clamping groove 302 in the water hole 301 of the drill bit 3 to achieve self-locking, preventing the drill bit nozzle from loosening and falling during the drilling operation, and improving the safety and reliability during the use of the drill bit nozzle.

[0054] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0055] It should be noted that in this application, relational terms such as "first" and "second" are only used 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 term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0056] The above are only specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but rather will conform to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A drill bit nozzle with a self-locking anti-falling mechanism, characterized in that, Comprising: A nozzle body (1), on the outer wall of which there is a receiving space (104) for installing a self-locking anti-dropping mechanism (2). The nozzle body (1) is located in the water hole (301) of the drill bit (3) and is detachably connected to the drill bit (3). An anti-dropping card slot (302) that is engaged with the self-locking anti-dropping mechanism (2) is provided in the water hole (301); A self-locking anti-dropping mechanism (2), which includes a self-locking stop block (201) rotatably connected in the receiving space (104). One end of the self-locking stop block (201) flips in a direction approaching the anti-dropping card slot (302) so that the self-locking stop block (201) is engaged with the anti-dropping card slot (302); The receiving space (104) is a rectangular groove. On both sides of the receiving space (104), there are fixed shafts (202) for rotatably connecting the self-locking stop block (201). On both sides of the self-locking stop block (201), there are mounting holes (203) for rotatably connecting the shafts (202); The self-locking stop block (201) is of a rectangular structure. At the top end of the self-locking stop block (201), there is a counterweight that offsets in a direction away from the anti-dropping card slot (302), and the counterweight enables the bottom end of the self-locking stop block (201) to be engaged with the anti-dropping card slot (302); The nozzle body (1) is of a hollow cylindrical structure. The nozzle body (1) is located in the water hole (301) of the drill bit (3) and is brazed and sealed to the drill bit (3). On the outer wall of the nozzle body (1), there are successively provided a first shoulder (107) and a second shoulder (108) with gradually increasing diameters from top to bottom. In the water hole (301), there are respectively a first stepped hole and a second stepped hole that cooperate with the first shoulder (107) and the second shoulder (108); 2. A drill bit nozzle with a self-locking anti-dropping mechanism according to claim 1, wherein: On the outer wall of the nozzle body (1), there is a mounting groove (105) for installing the shaft (202). The mounting groove (105) is located on both sides of the receiving space (104). The end of the shaft (202) away from the self-locking stop block (201) is located in the mounting groove (105) and is welded to the mounting groove (105); 3. A drill bit nozzle with a self-locking anti-dropping mechanism according to claim 1, wherein: In the receiving space (104), there is an elastic member that drives the top end of the self-locking stop block (201) to offset in a direction away from the anti-dropping card slot (302), and the elastic member enables the bottom end of the self-locking stop block (201) to be engaged with the anti-dropping card slot (302); 4. A drill bit nozzle with a self-locking anti-dropping mechanism according to claim 1, wherein: At the bottom end of the nozzle body (1), there is an unlocking hole (106) that extends into the receiving space (104). An unlocking rod extends into the unlocking hole (106) to drive the self-locking stop block (201) to flip in a direction away from the anti-dropping card slot (302) to disengage from the anti-dropping card slot (302).

5. A drill bit nozzle with a self-locking anti-falling mechanism as described in claim 1, characterized in that: The nozzle body (1) is a hollow cylindrical structure. An external thread (102) for threaded connection with the drill bit (3) is further provided on the outer wall of the nozzle body (1). Sealing rings (4) for sealing connection with the water holes (301) are provided at both the bottom and the top of the nozzle body (1). A plurality of grooves (101) are formed on the bottom surface of the nozzle body (1).

6. A drill bit nozzle with a self-locking anti-falling mechanism as described in claim 1, characterized in that: A plurality of the self-locking anti-falling mechanisms (2) are provided, and the plurality of the self-locking anti-falling mechanisms (2) are arranged circumferentially and evenly on the outer circumference of the nozzle body (1).

7. A drill bit nozzle with a self-locking anti-falling mechanism as described in claim 1, characterized in that: The anti-falling clamping groove (302) is an annular groove located in the water hole (301).

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