A retaining clip for a drill nozzle and a drill bit assembly

Abstract

This utility model discloses an anti-detachment retaining ring for drill bit nozzles and a drill bit assembly, relating to the field of drilling bits. It includes an annular elastomer having a first end face and a second end face distributed axially, with an inner groove formed on the second end face; and a protruding retaining member installed in the inner groove, with the projection of the protruding retaining member at least partially located outside the projection of the annular elastomer on a plane perpendicular to the axial direction of the annular elastomer. This effectively reduces the possibility of the nozzle detaching from the water outlet, solving the problem that conventional retaining rings are easily eroded by high-speed fluid and detach from the water outlet, leading to nozzle detachment.

Description

Technical Field

[0001] This utility model relates to the field of drilling bits, specifically to an anti-disengagement spring for drill bit nozzles and a drill bit assembly. Background Technology

[0002] Oil and gas drilling bits are rock-breaking tools used to fracture rocks. These bits are equipped with water outlets containing nozzles. During operation, high-speed fluid is ejected from the hollow nozzles, carrying away the rock cuttings. The nozzle orifice size adjusts the flow rate of the ejected fluid. During use, different nozzle specifications can be replaced on-site as needed, or damaged nozzles can be replaced to better suit the drill bit's operation. The nozzles and water outlets are typically connected by threads. When the drill bit is used at the bottom of the well, it operates in a constantly vibrating environment. Simultaneously, the high-speed fluid ejected from the nozzles can cause them to detach from the water outlets, colliding with the cutting elements and causing premature drill bit failure. This can result in significant economic losses for the drill bit user.

[0003] To prevent the nozzle from falling off, a retaining ring is typically placed at the nozzle location in the drill bit's water outlet. A conventional retaining ring is usually a notched metal ring that is placed in a retaining ring slot to hold the component in place and prevent it from falling off. The ring usually has holes designed to compress the diameter of the retaining ring with the assistance of external force, thereby inserting or removing the retaining ring into the retaining ring slot.

[0004] After the nozzle is installed into the water outlet, a conventional retaining ring is usually placed in a pre-machined groove at the nozzle outlet to block the nozzle and prevent it from falling out during use. However, the conventional retaining ring's installation position cannot avoid being eroded by the high-speed fluid passing through the nozzle. Therefore, it is easy for the conventional retaining ring to fall off, and the nozzle will subsequently fall off as well. Utility Model Content

[0005] This application provides an anti-detachment snap ring for drill nozzles and a drill assembly, which can solve the technical problem in the prior art where conventional snap rings are easily affected by high-speed fluid erosion and fall off from the water outlet, causing the nozzle to fall off.

[0006] In a first aspect, embodiments of this application provide an anti-disengagement snap ring for a drill nozzle, comprising:

[0007] An annular elastomer has a first end face and a second end face distributed along the axial direction, and an inner groove is formed on the second end face.

[0008] Additionally, a protruding snap-fit ​​element is mounted in the inner groove, and on a plane perpendicular to the axial direction of the annular elastomer, the projection of the protruding snap-fit ​​element is at least partially located outside the projection of the annular elastomer.

[0009] In conjunction with the first aspect, in one embodiment, the inner groove includes a first sidewall and a second sidewall distributed circumferentially along the annular elastomer, one end of the protruding snap-fit ​​is connected to the first sidewall, and the other end extends toward the second sidewall, forming a gap with the second sidewall.

[0010] In conjunction with the first aspect, in one embodiment, the inner groove includes a first sidewall and a second sidewall distributed circumferentially along the annular elastomer, one end of the protruding snap-fit ​​is connected to the first sidewall, and the other end extends toward the second sidewall, forming a gap with the second sidewall.

[0011] In conjunction with the first aspect, in one embodiment, an anti-disengagement snap ring for a drill nozzle further includes:

[0012] The connector has a snap-fit ​​groove on its first end face, and the connector is used to snap into the snap-fit ​​groove.

[0013] In conjunction with the first aspect, in one embodiment, the snap-fit ​​groove is L-shaped, the connector is hook-shaped, and the hook-shaped portion of the connector can extend into the snap-fit ​​groove and snap into the annular elastomer.

[0014] In conjunction with the first aspect, in one embodiment, the snap-fit ​​groove is axially opened along the first end face, and the inner wall of the snap-fit ​​groove is provided with an internal thread. The connector is configured as a threaded rod, and the external thread of the threaded rod is threadedly engaged with the snap-fit ​​groove.

[0015] In conjunction with the first aspect, in one embodiment, the annular elastomer includes a blocking portion and two snap-fit ​​portions extending circumferentially along both ends of the blocking portion, and at least one of the snap-fit ​​portions is provided with the inner groove and the protruding snap-fit ​​member on the second end face.

[0016] In conjunction with the first aspect, in one embodiment, both of the latching portions are provided with the inner groove and the protruding latching member on the second end face, and the two protruding latching members are arranged opposite to each other.

[0017] Secondly, embodiments of this application provide a drill bit assembly, which includes:

[0018] A snap ring for a drill nozzle as described in any of the above.

[0019] In conjunction with the second aspect, in one embodiment, a drill bit assembly further includes:

[0020] The drill bit body has a water outlet hole, and the inner wall of the water outlet hole has a receiving groove that is adapted to the protruding snap-fit ​​component.

[0021] The nozzle body is snapped into the water outlet hole;

[0022] Furthermore, the anti-detachment spring is engaged between the inner wall of the water outlet and the nozzle.

[0023] In conjunction with the second aspect, in one embodiment, the receiving groove is configured as an arc-shaped groove, the receiving groove extending outward in an arc shape from the inner wall of the water outlet, and the arc of the receiving groove is adapted to the extension angle of the protruding snap-fit ​​member relative to the circumferential direction of the annular elastomer.

[0024] The beneficial effects of the technical solutions provided in this application include:

[0025] By using an elastic material to make the annular elastomer, the diameter of the annular elastomer can be reduced by squeezing it from both sides, allowing it to be inserted into a drill bit outlet hole with a smaller diameter than the original diameter of the annular elastomer. The annular elastomer has an inner groove with a protruding snap-fit ​​element. On a plane perpendicular to the axial direction of the annular elastomer, the projection of the protruding snap-fit ​​element is at least partially located outside the projection of the annular elastomer. Therefore, the diameter of the protruding snap-fit ​​element is larger than the diameter of the annular elastomer, allowing the annular elastomer to be inserted into the outlet hole. After being inserted into the hole, the protruding snap-fit ​​part expands outward due to the deformation of its original shape, thereby providing additional support for the annular elastomer. Furthermore, a receiving groove adapted to the annular elastomer can be machined inside the water outlet hole, so that after the annular elastomer is placed into the water outlet hole, the annular elastomer recovers due to its own elasticity and can extend into the receiving groove, thereby achieving circumferential snap-fit ​​of the annular elastomer. This effectively reduces the possibility of the nozzle falling out of the water outlet hole and solves the problem that conventional snap rings are easily affected by high-speed fluid scouring and fall out of the water outlet hole, causing the nozzle to fall off. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of an anti-dislodgement snap ring for a drill nozzle according to this application;

[0028] Figure 2 This is a cross-sectional view of the drill body in a drill bit assembly according to this application;

[0029] Figure 3 A cross-sectional view of the anti-disengagement circlip installed on the drill bit body.

[0030] In the figure: 1. Annular elastomer; 11. First end face; 12. Second end face; 111. Inner groove; 112. First side wall; 113. Second side wall; 114. Snap-fit ​​groove; 13. Blocking part; 14. Snap-fit ​​part; 2. Protruding snap-fit ​​part; 3. Drill bit body; 31. Water outlet hole; 311. Receiving groove; 4. Nozzle body. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0032] This application provides an anti-detachment snap ring for a drill nozzle and a drill assembly, which can solve the problem that conventional snap rings are easily affected by high-speed fluid erosion and fall off from the water outlet, causing the nozzle to fall off.

[0033] Reference Figure 1 This application discloses an anti-disengagement spring for a drill nozzle, comprising an annular elastomer 1 and a protruding snap-fit ​​element 2. The annular elastomer 1 is made of an elastic material, allowing it to deform elastically when squeezed by an operator from both sides, thus enabling it to snap into a drill nozzle water outlet 31 with a diameter smaller than its original size. The annular elastomer 1 has a first end face 11 and a second end face 12 distributed along the axial direction. An inner groove 111 is formed on the second end face 12, and the protruding snap-fit ​​element 2 is installed in the inner groove 111. On the axial plane perpendicular to the annular elastomer 1, the projection of the protruding snap fastener 2 is at least partially located outside the projection of the annular elastomer 1, so that at least part of the protruding snap fastener 2 extends out circumferentially from the annular elastomer 1. When actually installing the anti-detachment snap fastener, a receiving groove 311 can be machined at the installation position of the water outlet 31. The operator squeezes the annular elastomer 1 and the protruding snap fastener 2, causing the annular elastomer 1 to deform, and then inserts the annular elastomer 1 into the water outlet 31. After releasing, the annular elastomer 1 and the protruding snap fastener 2 return to their initial state due to their own elasticity. The annular elastomer 1 is blocked by the diameter of the water outlet 31, thus achieving circumferential clamping. The protruding snap fastener 2 extends into the receiving groove 311 of the water outlet 31, thus achieving axial clamping. This effectively reduces the possibility of the nozzle falling out of the water outlet 31, and solves the problem that conventional snap fasteners are easily affected by high-speed fluid scouring and fall out of the water outlet 31, causing the nozzle to fall out.

[0034] More specifically, the inner groove 111 includes a first sidewall 112 and a second sidewall 113 distributed circumferentially on the annular elastic body 1. One end of the protruding latching member 2 is connected to the first sidewall 112, and the other end of the protruding latching member 2 extends toward the second sidewall 113, with a gap formed between the other end of the protruding latching member 2 and the second sidewall 113. The end of the protruding latching member 2 not connected to the annular elastic body 1 protrudes circumferentially from the annular elastic body 1, making it easier for the operator to squeeze the protruding latching member 2 and deform it. In other embodiments, one end of the protruding latching member 2 can be connected to the first sidewall 112, and the other end of the protruding latching member 2 can be connected to the second sidewall 113, with the middle part of the protruding latching member 2 protruding from the circumferential trajectory of the annular elastic body 1, thereby improving the structural stability of the protruding latching member 2.

[0035] Preferably, the annular elastomer 1 includes a blocking portion 13 and two engaging portions 14 extending axially from both ends of the blocking portion 13. At least one engaging portion 14 has an inner groove 111 on its second end face 12, making the annular elastomer 1 a non-closed ring, which makes it easier for the operator to squeeze the annular elastomer 1 from both sides and cause the annular elastomer 1 to deform. In one embodiment of this application, both engaging portions 14 have inner grooves 111 on their second end faces 12 for protruding engaging members 2, and the two protruding engaging members 2 are staggered to achieve axial clamping from both ends of the annular elastomer 1, further improving the tightness of the annular elastomer 1 within the water outlet 31. In another embodiment of this application, the two engaging portions 14 can also be connected to make the annular elastomer 1 a closed ring, thereby improving the circumferential clamping ability of the annular elastomer 1.

[0036] This application also proposes a drill bit assembly, referring to... Figure 2 and Figure 3 It includes the aforementioned anti-disengagement spring, drill bit body 3, and nozzle body 4. The nozzle body 4 is disposed in the water outlet 31, and the anti-disengagement spring is engaged between the nozzle body 4 and the water outlet 31. The drill bit body 3 has an axially formed water outlet 31. The inner wall of the water outlet 31 has a receiving groove 311 adapted to the protruding snap-fit ​​2, so that after the annular elastic body 1 is placed into the water outlet 31, the protruding snap-fit ​​2 can extend into the receiving groove 311 to achieve axial clamping.

[0037] Furthermore, to facilitate the operator in removing the anti-detachment spring to replace the nozzle, the receiving groove 311 at the water outlet 31 is set as an arc-shaped groove. The receiving groove 311 extends outward in an arc shape from the inner wall of the water outlet 31, and the arc of the receiving groove 311 is adapted to the circumferential extension angle of the protruding snap-fit ​​2 relative to the annular elastic body 1. This allows the protruding snap-fit ​​2 to rotate within the arc-shaped receiving groove 311 after it extends into the receiving groove 311, and rotates towards the axis of the annular elastic body under the pressure of the inner wall of the water outlet 31, until the protruding snap-fit ​​2 rotates out of the arc-shaped receiving groove 311, thus releasing the axial clamping of the anti-detachment spring inside the water outlet 31.

[0038] The anti-detachment snap ring is also equipped with a connector for removing the anti-detachment snap ring from the water outlet 31. The first end face 11 of the annular elastic member is provided with a snap-fit ​​groove 114 so that the connector and the annular elastic member can be snapped together.

[0039] In one embodiment of this application, reference is made to Figure 1 The locking groove 114 is L-shaped, allowing a locking block to be formed on the first end face 11 of the annular elastic body 1. The connector is hook-shaped, with the hook-shaped part extending into the L-shaped locking groove 114 and engaging with the end of the locking block on the first end face 11 of the annular elastic body 1. The operator can rotate the anti-disengagement spring within the water outlet 31 via the connector, allowing the protruding locking member 2 to rotate out of the arc-shaped receiving groove 311, thus eliminating the axial clamping effect of the protruding locking member 2 on the anti-disengagement spring.

[0040] In other embodiments, the snap-fit ​​groove 114 can be formed on the first end face 11 along the axial direction of the annular elastic body 1, and an internal thread can be added to the inner wall of the snap-fit ​​groove 114. The connector is set as a threaded rod, and the threaded rod is adapted to the internal thread. The threaded rod is rotated and screwed into the snap-fit ​​groove 114, which can also realize the connection between the connector and the annular elastic body 1, thereby driving the annular elastic body 1 to rotate in the water outlet 31 and disengage.

[0041] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0042] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. 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 this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A retaining spring for a drill bit nozzle, characterized in that, It includes: An annular elastomer (1) has a first end face (11) and a second end face (12) distributed along the axial direction, and an inner groove (111) is provided on the second end face (12). In addition, a protruding snap-fit ​​(2) is mounted in the inner groove (111), and on an axial plane perpendicular to the annular elastomer (1), the projection of the protruding snap-fit ​​(2) is at least partially located outside the projection of the annular elastomer (1).

2. The anti-disengagement snap ring for a drill nozzle according to claim 1, characterized in that: The inner groove (111) includes a first sidewall (112) and a second sidewall (113) distributed circumferentially along the annular elastomer (1). One end of the protruding snap fastener (2) is connected to the first sidewall (112), and the other end extends toward the second sidewall (113), forming a gap with the second sidewall (113).

3. The anti-disengagement snap ring for a drill nozzle according to claim 1, characterized in that, Also includes: The connector has a snap-fit ​​groove (114) on its first end face (11), and the connector is used to snap-fit ​​with the snap-fit ​​groove (114).

4. The anti-disengagement snap ring for a drill nozzle according to claim 3, characterized in that: The snap-fit ​​groove (114) is L-shaped, the connector is hook-shaped, and the hook-shaped part of the connector can extend into the snap-fit ​​groove (114) and snap-fit ​​with the annular elastomer (1).

5. A retaining ring for a drill nozzle according to claim 3, characterized in that: The snap-fit ​​groove (114) is axially opened along the first end face (11), and the inner wall of the snap-fit ​​groove (114) is provided with an internal thread. The connector is configured as a threaded rod, and the external thread of the threaded rod is threadedly engaged with the snap-fit ​​groove (114).

6. A retaining ring for a drill nozzle according to claim 1, characterized in that: The annular elastomer (1) includes a blocking portion (13) and two snap-fit ​​portions (14) extending circumferentially along both ends of the blocking portion (13). At least one of the snap-fit ​​portions (14) is provided with the inner groove (111) and the protruding snap-fit ​​member (2) on the second end face (12).

7. A retaining ring for a drill nozzle according to claim 6, characterized in that: Both of the aforementioned snap-fit ​​portions (14) are provided with the inner groove (111) and the protruding snap-fit ​​member (2) on the second end face (12), and the two protruding snap-fit ​​members (2) are arranged opposite to each other.

8. A drill bit assembly, characterized in that, It includes: A snap ring for a drill nozzle as described in any one of claims 1-6.

9. A drill bit assembly according to claim 8, characterized in that, It also includes: The drill bit body (3) has a water outlet hole (31) and a receiving groove (311) adapted to the protruding snap-fit ​​(2) is provided on the inner wall of the water outlet hole (31). The nozzle body (4) is snapped into the water outlet (31); In addition, the anti-detachment spring is engaged between the inner wall of the water outlet (31) and the nozzle.

10. A drill bit assembly according to claim 9, characterized in that: The receiving groove (311) is configured as an arc-shaped groove. The receiving groove (311) extends outward in an arc shape from the inner wall of the water outlet (31). The arc of the receiving groove (311) is adapted to the circumferential extension angle of the protruding snap-fit ​​member (2) relative to the annular elastomer (1).

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