PDC (Polycrystalline Diamond Compact) drill bit with lengthened nozzle

Abstract

The invention discloses a PDC drill bit with a lengthened nozzle, and relates to the technical field of PDC drill bits, the PDC drill bit comprises a connecting main rod, a cutting head is arranged on the upper portion of the connecting rod, a mounting assembly is arranged on the cutting head, a working assembly is arranged on the mounting assembly, an auxiliary assembly is arranged on the outer wall of the cutting head, and a cleaning assembly is arranged on the top of the cutting head. The cleaning lengthened nozzles are additionally arranged on the PDC drill bit to clean the PDC drill bit, soil is prevented from being attached to the PDC drill bit, the working efficiency of the PDC drill bit is improved, efficient drilling is achieved, the number of times of tripping caused by poor rock cleaning performance of the drill bit is reduced, the single-trip drilling ruler is prolonged, and the service life of the PDC drill bit is prolonged. The tooth surface shearing force of the PDC drill bit is improved; the flow velocity near the teeth is increased; the distance between a nozzle outlet and the well bottom is shortened; jet flow diffusion is reduced, hydraulic energy loss is reduced, the rock cleaning and cooling effects of drill bit teeth in a specific area are enhanced, and the service life of the PDC drill bit is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of PDC drill bits, in particular to a PDC drill bit with an extended nozzle. Background Art

[0002] PDC drill bits offer advantages such as high mechanical penetration rates and long drill bit life. They primarily consist of a drill body, PDC cutters, and nozzles. Their operating principle is to use the cutters to generate shear stress in the formation, causing plastic deformation and fracture of the rock, and removing cuttings from the wellbore.

[0003] PDC drill bits typically use lower weight on bit and higher rotational speed to improve cutting efficiency and footage. However, in actual drilling, traditional PDC drill bits still face some technical bottlenecks, such as insufficient bottomhole flushing intensity, severe drill bit balling, and limited drilling speed.

[0004] To ensure the normal use of PDC drill bits during drilling, they need to be cleaned. Existing methods for cleaning PDC drill bits include adding nozzles or increasing the discharge volume of cleaning fluid in the nozzles. However, simply adding nozzles to the PDC drill bit has a relatively low cleaning efficiency. By increasing the length of the nozzle, the distance between the nozzle and the bottom of the well can be effectively shortened, thereby enhancing the flushing intensity of the well bottom, reducing the mud balling phenomenon of the drill bit, and improving the drilling speed and reliability of the drill bit.

[0005] Therefore, it is necessary to propose a PDC drill bit with an extended nozzle. Summary of the Invention

[0006] The object of the present invention is to provide a PDC drill bit with an extended nozzle to solve the problems existing in the prior art.

[0007] To achieve the above object, the present invention provides the following technical solutions: A PDC drill bit with an extended nozzle includes a connecting main rod, a cutting head provided on the upper part of the connecting rod, a mounting assembly provided on the cutting head, a working assembly provided on the mounting assembly, an auxiliary assembly provided on the outer wall of the cutting head, and a cleaning assembly provided on the top of the cutting head.

[0008] The mounting assembly of the PDC drill bit with an extended nozzle as described above includes a mounting base, which is arranged on the top of the cutting head. The mounting base is provided with a mounting substrate, which is provided with a through hole, and the mounting substrate is provided with a working assembly.

[0009] As described above, a PDC drill bit with an extended nozzle, the working assembly includes PDC teeth, the PDC teeth are arranged on a mounting base plate, a working layer is provided on the top of the PDC teeth, and a mesh is provided at the bottom of the PDC teeth, and the mesh is provided on the mounting base plate.

[0010] In the PDC drill bit with an extended nozzle as described above, the mounting substrate is a curved soft plate.

[0011] In the PDC drill bit with an extended nozzle as described above, the auxiliary assembly includes an auxiliary plate, which is arranged on the outer wall of the cutting head and has an auxiliary inclined plate.

[0012] As described above, a PDC drill bit with an extended nozzle, the cleaning assembly includes a mounting groove, the mounting groove is arranged on the top of the cutting head, a threaded hole is provided in the mounting groove, a cleaning extended nozzle is provided in the mounting groove, the cleaning extended nozzle is connected to the mounting groove through a thread, a protective cover is provided on the top of the mounting groove, and the cleaning extended nozzle passes through the protective cover.

[0013] In the PDC drill bit with an extended nozzle as described above, a cross groove is provided on the top of the cleaning extended nozzle.

[0014] The advantages of the present invention are that: the present invention adds a cleaning assembly to the PDC drill bit to clean the PDC drill bit, and the cleaning extended nozzle in the cleaning assembly performs high-pressure flushing on the soil on the PDC drill bit to prevent the soil from adhering to the PDC drill bit. At the same time, the auxiliary assembly can also prevent the soil from adhering to the PDC drill bit, thereby increasing the use efficiency of the PDC drill bit and also increasing the service life of the PDC drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a first stereogram of the present invention; Figure 3 is a second perspective view of the present invention; Figure 4 is a third perspective view of the present invention; Figure 5 is a fourth perspective view of the present invention; Figure 6 yes Figure 3 A1 in the middle is a partial enlarged view; Figure 7 It is a simplified structural diagram of the extended nozzle.

[0017] Figure markings: 1. Connecting main rod; 2. Cutting head; 3. Mounting assembly; 4. Working assembly; 5. Auxiliary assembly; 6. Cleaning assembly; 11. External thread; 21. Mounting base; 22. Mounting substrate; 23. Through hole; 41. PDC tooth; 42. Working layer; 43. Mesh; 51. Auxiliary plate; 52. Auxiliary inclined plate; 61. Mounting groove; 62. Cleaning extension nozzle; 63. Protective cover. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] like Figure 1-7 As shown, a PDC drill bit with an extended nozzle includes a connecting main rod 1, a cutting head 2 is provided on the upper part of the connecting rod, a mounting assembly 3 is provided on the cutting head 2, a working assembly 4 is provided on the mounting assembly 3, an auxiliary assembly 5 is provided on the outer wall of the cutting head 2, and a cleaning assembly 6 is provided on the top of the cutting head 2. When using the present invention, the components are first connected together according to the connection relationship. The present invention is connected to the drilling equipment by the external thread 11 at the bottom of the connecting rod. When the present invention is used, mud and sand are easily adhered to the working assembly 4, and then the cleaning assembly 6 cleans the mud and sand on the working assembly 4. At the same time, some mud and sand will adhere to the side wall of the present invention. There is an inclination angle between the auxiliary assembly 5 and the present invention, and some mud and sand will fall as the present invention moves, ensuring the normal use of the present invention.

[0020] Specifically, if Figure 1-7 As shown, the mounting assembly 3 of this embodiment includes a mounting base 21, which is positioned on top of the cutting head 2. A mounting substrate 22 is mounted on the mounting base 21, which has a through-hole 23 defined therein. The working assembly 4 is mounted on the mounting substrate 22. The mounting substrate 22 is a curved flexible board. This provides a better connection to the mounting base 21 and facilitates the installation of the working assembly 4. The through-hole 23 also facilitates the cleaning assembly, increasing the fluidity of sediment and reducing the likelihood of sediment adhering to the mounting assembly 3.

[0021] Specifically, such as Figure 1-7As shown, the working assembly 4 of this embodiment includes a PDC tooth 41, which is mounted on a mounting base 22. A working layer 42 is provided on the top of the PDC tooth 41, and a mesh 43 is provided on the bottom of the PDC tooth 41. The mesh 43 is mounted on the mounting base 22. The working layer 42 mainly plays a rock breaking role, improves the working efficiency of the PDC tooth 41, and extends the service life of the present invention.

[0022] Further, such as Figure 1-7 As shown, the auxiliary assembly 5 of this embodiment includes an auxiliary plate 51, which is arranged on the outer wall of the cutting head 2. An auxiliary inclined plate 52 is provided on the auxiliary plate 51. There is an inclination angle between the auxiliary inclined plate 52 and the present invention, and some mud and sand will fall with the movement of the present invention, ensuring the normal use of the present invention.

[0023] Furthermore, Figure 1-7 As shown, the cleaning assembly 6 of this embodiment includes a mounting groove 61, which is arranged on the top of the cutting head 2. A threaded hole is provided in the mounting groove 61, and an extended cleaning nozzle 62 is provided in the mounting groove 61. The extended cleaning nozzle 62 is connected to the mounting groove 61 by a thread. A protective cover 63 is provided on the top of the mounting groove 61, and the extended cleaning nozzle 62 passes through the protective cover 63. A cross groove is provided on the top of the extended cleaning nozzle 62. The cleaning extension nozzle 62 cleans the PDC teeth 41 and prevents mud and sand from adhering to the PDC teeth 41 and affecting the normal use of the PDC drill bit. At the same time, the protective cover 63 prevents the cleaning extension nozzle 62 from falling off. In this embodiment, the protective cover 63 is set to the top of the cleaning extension nozzle 62, and a through hole is provided on the protective cover 63. The protective cover 63 is slidably connected to the cleaning extension nozzle 62. A ball is provided at the top of the cleaning extension nozzle 62. The protective cover 63 and the ball are magnetically attracted. Because the cleaning liquid is sprayed out from the nozzle, the cleaning liquid exerts an impact force on the protective cover 63, and then the protective cover 63 rotates on the cleaning extension nozzle 62 to adjust the cleaning direction of the cleaning extension nozzle 62, thereby increasing the scope of use of the present invention.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A PDC drill bit with an extended nozzle, characterized in that: The invention comprises a connecting main rod (1), a cutting head (2) is arranged on the upper part of the connecting rod, a mounting assembly (3) is arranged on the cutting head (2), a working assembly (4) is arranged on the mounting assembly (3), an auxiliary assembly (5) is arranged on the outer wall of the cutting head (2), and a cleaning assembly (6) is arranged on the top of the cutting head (2).

2. A PDC drill bit with an extended nozzle according to claim 1, characterized in that: The mounting assembly (3) comprises a mounting base (21), the mounting base (21) is arranged on the top of the cutting head (2), a mounting substrate (22) is arranged on the mounting base (21), a through hole (23) is arranged on the mounting substrate (22), and a working assembly (4) is arranged on the mounting substrate (22).

3. A PDC drill bit with an extended nozzle according to claim 1, characterized in that: The working assembly (4) comprises a PDC tooth (41), the PDC tooth (41) is arranged on a mounting substrate (22), a working layer (42) is arranged on the top of the PDC tooth (41), a mesh (43) is arranged on the bottom of the PDC tooth (41), and the mesh (43) is arranged on the mounting substrate (22).

4. A PDC drill bit with an extended nozzle according to claim 2, characterized in that: The mounting substrate (22) is a curved soft board.

5. A PDC drill bit with an extended nozzle according to claim 1, characterized in that: The auxiliary component (5) comprises an auxiliary plate (51), the auxiliary plate (51) is arranged on the outer wall of the cutting head (2), and an auxiliary inclined plate (52) is arranged on the auxiliary plate (51).

6. A PDC drill bit with an extended nozzle according to claim 1, characterized in that: The cleaning assembly (6) comprises a mounting groove (61), the mounting groove (61) being arranged at the top of the cutting head (2), a threaded hole being arranged in the mounting groove (61), a cleaning extension nozzle (62) being arranged in the mounting groove (61), the cleaning extension nozzle (62) being connected to the mounting groove (61) via a thread, a protective cover (63) being arranged at the top of the mounting groove (61), and the cleaning extension nozzle (62) passing through the protective cover (63).

7. A PDC drill bit with an extended nozzle according to claim 1, characterized in that: The top of the cleaning extension nozzle (62) is provided with a cross groove.

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