Diamond compact

Abstract

The utility model relates to a diamond compact, and belongs to the technical field of drill bits for drilling. The diamond compact comprises a tooth sleeve and a tooth core, the tooth core comprises a stepped tooth body and a tooth crown connected to the tooth body, and the tooth core is partially located in the tooth sleeve and rotationally connected with the tooth sleeve; the tooth sleeve is of a hollow structure, and a protruding section used for limiting the tooth body is arranged on the inner wall of the tooth sleeve. The tooth sleeve is of a hollow structure, part of the tooth core is located in the tooth sleeve, the tooth core is rotationally connected with the tooth sleeve, and the tooth core can rotate in the tooth sleeve, so that when the drill bit cuts a rock stratum, the tooth core can rotate, and the situation that when the rock stratum is cut, a certain area of the tooth core makes contact with the rock all the time and is abraded for a long time is avoided; and the service life of the diamond compact can be prolonged. The inner wall of the tooth sleeve is provided with the protruding section used for limiting the tooth body, the tooth body can be limited, and the tooth body is prevented from being disengaged from the tooth sleeve.

Description

Technical Field

[0001] The present application relates to the technical field of drill bits for drilling, and in particular to a diamond composite sheet. Background Art

[0002] Diamond composite sheets are made by sintering diamond powder and cemented carbide substrate under ultra-high pressure and high temperature conditions. They have the high hardness, high wear resistance and thermal conductivity of diamond, as well as the strength and impact toughness of cemented carbide. They are ideal materials for manufacturing cutting tools, drilling bits and other wear-resistant tools. In related technologies, traditional composite sheets are generally cylindrical, and are made of a diamond composite layer with a thickness of 2-3mm and a cemented carbide substrate pressed under high temperature and high pressure. They are generally fixedly connected to the PDC drill bit body by brazing or other methods.

[0003] When a traditional composite sheet is cutting rock, a certain area of ​​the diamond composite sheet is always in contact with and cutting the rock, causing severe wear of the area of ​​the diamond composite sheet, making the diamond composite layer passivated and losing the cutting function prematurely. Summary of the invention

[0004] The embodiment of the present application provides a diamond composite sheet to solve the problem in the related art that when cutting a rock layer, a certain area of ​​the diamond composite sheet will always be in contact with the rock for cutting, causing the area to be severely worn and affecting the service life of the diamond composite sheet.

[0005] The present application provides a diamond composite sheet, comprising:

[0006] Gear sleeves and gear cores;

[0007] The tooth core comprises a stepped tooth body and a tooth crown connected to the tooth body, and the tooth core is partially located in the tooth sleeve and is rotatably connected to the tooth sleeve;

[0008] The tooth sleeve is a hollow structure, and the inner wall of the tooth sleeve is provided with a protruding section for limiting the tooth body.

[0009] In some embodiments, a locking ring is further included, which is arranged at one end of the tooth body away from the tooth crown, the locking ring is threadedly connected to the tooth body, and a "concave" shaped structure matching the protruding section is formed between the locking ring and the tooth body.

[0010] In some embodiments, the gear sleeve, the gear body and the locking ring are made of cemented carbide, and the gear crown is made of polycrystalline diamond.

[0011] In some embodiments, the tooth body includes a threaded segment connected to the locking ring and a contact segment perpendicular to the threaded segment and used to contact and limit the locking ring.

[0012] In some embodiments, the tooth body includes an overlapping section overlapped with the tooth sleeve, a base section connected to the overlapping section, and a conical section connected to the base section, and the tooth crown is fixedly connected to the outer wall of the overlapping section.

[0013] In some embodiments, a stepped through hole is provided on the tooth sleeve.

[0014] In some embodiments, the outer wall of the locking ring is provided with an anti-rotation concave surface along the height direction.

[0015] In some embodiments, a tapered hole for matching the tapered section is formed at one end of the tooth sleeve, the tapered hole is connected to an end surface area, and the end surface area abuts against the platform section.

[0016] In some embodiments, a stepped plug is fixedly disposed in the stepped through hole.

[0017] In some embodiments, a cylindrical hole is formed at one end of the tooth sleeve away from the tooth crown, and a cover plate is fixedly installed in the cylindrical hole.

[0018] The beneficial effects of the technical solution provided by this application include:

[0019] An embodiment of the present application provides a diamond composite sheet, including a tooth sleeve and a tooth core; the tooth core includes a stepped tooth body and a tooth crown connected to the tooth body, the tooth core portion is located in the tooth sleeve and is rotatably connected to the tooth sleeve; the tooth sleeve is a hollow structure, and the inner wall of the tooth sleeve is provided with a protruding section for limiting the tooth body.

[0020] In actual use, since the tooth sleeve is a hollow structure, part of the tooth core is located inside the tooth sleeve, and the tooth core is rotatably connected to the tooth sleeve, so that the tooth core can be rotated inside the tooth sleeve, so that when the drill bit is cutting the rock formation, the tooth core can rotate, avoiding a certain area of ​​the tooth core from being in contact with the rock all the time when cutting the rock formation, and being subjected to long-term wear, which can improve the service life of the diamond composite sheet. The tooth core includes a stepped tooth body and a tooth crown connected to the tooth body; the inner wall of the tooth sleeve is provided with a protruding section for limiting the tooth body. The setting of the protruding section can limit the tooth body and prevent the tooth body from falling out of the tooth sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1A schematic diagram of the overall structure provided for an embodiment of the present application;

[0023] Figure 2 for Figure 1 Schematic diagram of the middle gear sleeve;

[0024] Figure 3 for Figure 1 Schematic diagram of the mesodontium;

[0025] Figure 4 for Figure 1 Schematic diagram of the middle locking ring;

[0026] Figure 5 for Figure 4 A cross-sectional view of

[0027] Figure 6 for Figure 1 Schematic diagram of the medium stepped plug.

[0028] Reference numerals:

[0029] 1. Tooth sleeve; 2. Tooth core; 3. Tooth body; 4. Tooth crown; 5. Cover plate; 6. Locking ring; 7. Step-shaped plug; 11. End face area; 12. Tapered hole; 15. Protruding section; 16. Step-shaped through hole; 17. Load-bearing section; 19. Cylindrical hole; 31. Overlap section; 32. Abutment section; 33. Tapered section; 34. Load-bearing section; 35. Lower end face of the load-bearing section; 36. Stop groove section; 37. Resistance section; 38. Threaded section; 61. Anti-rotation concave surface; 62. Internal thread surface; 64. Limit end face. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] The embodiment of the present application provides a diamond composite sheet, which can solve the problem in the related art that when cutting a rock layer, a certain area of ​​the diamond composite sheet will always be in contact with the rock for cutting, causing the area to be severely worn, thereby affecting the service life of the diamond composite sheet.

[0032] See also Figures 1 to 4As shown, an embodiment of the present application provides a diamond composite sheet, including a tooth sleeve 1 and a tooth core 2; the tooth core 2 includes a stepped tooth body 3 and a tooth crown 4 connected to the tooth body 3, the tooth core 2 is partially located in the tooth sleeve 1, and is rotatably connected to the tooth sleeve 1; the tooth sleeve 1 is a hollow structure, and the inner wall of the tooth sleeve 1 is provided with a protruding section 15 for limiting the tooth body 3.

[0033] In actual use, since the tooth sleeve 1 is a hollow structure, part of the tooth core 2 is located inside the tooth sleeve 1, and the tooth core 2 is rotatably connected to the tooth sleeve 1, so that the tooth core 2 can be rotated inside the tooth sleeve 1, so that when the drill bit is cutting the rock formation, the tooth core 2 can rotate, avoiding a certain area of ​​the tooth core 2 from being in contact with the rock all the time when cutting the rock formation, and being subjected to long-term wear, which can improve the service life of the diamond composite sheet. The tooth core 2 includes a stepped tooth body 3 and a tooth crown 4 connected to the tooth body 3; the inner wall of the tooth sleeve 1 is provided with a protruding section 15 for limiting the tooth body 3. The setting of the protruding section 15 can limit the tooth body 3 and prevent the tooth body 3 from falling out of the tooth sleeve 1.

[0034] In some optional embodiments, the gear sleeve 1, the gear body 3 and the locking ring 6 are made of cemented carbide, and the gear crown 4 is made of polycrystalline diamond, thereby forming a diamond composite layer.

[0035] In some optional embodiments, such as Figure 1 , Figure 4 and Figure 5 As shown, the locking ring 6 is also included. The locking ring 6 is arranged at one end of the tooth body 3 away from the tooth crown 4. The locking ring 6 is threadedly connected to the tooth body 3, and a "concave"-shaped structure matching the protruding section 15 is formed between the locking ring 6 and the tooth body 3. The setting of the locking ring 6 cooperates with the stepped tooth body 3, and a "concave"-shaped structure matching the protruding section 15 is formed between the locking ring 6 and the tooth body 3. The protruding section 15 can prevent the tooth body 3 from falling out of the gear sleeve 1.

[0036] In some optional embodiments, such as Figure 1 and Figure 3 As shown, the tooth body 3 includes a threaded section 38 connected to the locking ring 6, and a contact section 37 perpendicular to the threaded section 38 for contacting the limiting locking ring 6. The arrangement of the threaded section 38 enables the tooth body 3 to be connected and fixed to the locking ring 6, and the contact section 37 is arranged perpendicular to the threaded section 38, so that when the threaded section 38 and the locking ring 6 are threadedly connected, the locking ring 6 can be contacted to limit the position, thereby ensuring the reliability of the threaded connection.

[0037] In some optional embodiments, such as Figure 1 and Figure 3As shown, the tooth body 3 includes an overlap section 31 overlapped with the tooth sleeve 1, a base section 32 connected to the overlap section 31, and a tapered section 33 connected to the base section 32, and the tooth crown 4 is fixedly connected to the outer wall of the tooth body 3 perpendicular to the overlap section 31. The tooth body 3 is provided with an overlap section 31 and a base section 32, the overlap section 31 and the base section 32 are perpendicular to each other, the tapered section 33 is connected to the base section 32, and the tapered section 33 and the base section 32 are arranged at a certain inclination angle, and an oblique line section matching the tapered section 33 is provided at one end of the tooth sleeve 1, so that when the tooth body 3 rotates in the tooth sleeve 1, it is ensured that there is no large interference between the tooth body 3 and the tooth sleeve 1.

[0038] A load-bearing section 34 is connected to one end of the conical section 33, and a load-bearing section lower end face 35 and a retaining groove section 36 are connected to one end of the load-bearing section 34. The load-bearing section 34 is wider than the retaining groove section 36, and a "concave"-shaped structure is formed between the load-bearing section 34, the locking ring 6 and the retaining groove section 36, matching the gear sleeve 1. In addition, a transition inclined surface is provided between the load-bearing section 34 and the load-bearing section lower end face 35, and between the load-bearing section lower end face 35 and the retaining groove section 36. Compared with a direct vertical transition method, this arrangement allows the gear body 3 to be less disturbed when rotating in the gear sleeve 1.

[0039] In some optional embodiments, such as Figure 1 and Figure 2 As shown, a conical hole 12 for matching the conical section 33 is formed at one end of the gear sleeve 1, and the conical hole 12 is connected to the end surface area 11, and the end surface area 11 abuts against the base section 32. The conical hole 12 can match the conical section 33, and the setting of the conical structure here can ensure that when the tooth body 3 rotates in the gear sleeve 1, there will be no significant interference between the tooth body 3 and the gear sleeve 1, and the rotation of the tooth body 3 will not be hindered.

[0040] In some optional embodiments, such as Figure 1 and Figure 2 As shown, a stepped through hole 16 is provided on the gear sleeve 1. An anti-rotation concave surface 61 is provided on the outer wall of the locking ring 6 along the height direction. In use, a cylindrical rod can be used to abut against the anti-rotation concave surface 61 of the locking ring 6 to prevent the locking ring 6 from rotating when the locking ring 6 is connected to the tooth body 3 through threads. Specifically, the cylindrical rod is used to abut against the anti-rotation concave surface 61 of the locking ring 6, so that the locking ring 6 is relatively stationary, which facilitates the locking ring 6 to be rotatably connected to the threaded section 38 of the tooth body 3.

[0041] Moreover, the outer diameter of the locking ring 6 is smaller than the inner diameter of the bearing section 17 of the gear sleeve 1 to ensure that the gear sleeve 1 will not hinder the overall rotation of the gear body 3. During assembly, after applying a layer of anti-debonding uniformly on the inner thread surface 62 of the locking ring 6, the locking ring 6 can be placed from the tail of the gear sleeve 1 into the bearing section 17, and the anti-rotation concave surface 61 can be aligned with the stepped through hole 16 of the gear sleeve 1, and a cylindrical rod can be inserted from the stepped through hole 16 and pressed against the anti-rotation concave surface 61; after applying a layer of anti-debonding uniformly on the thread surface of the tail of the gear body 3, the tail of the gear body 3 can be inserted from the hole of the head of the gear sleeve 1, and the gear body 3 can be rotated in the direction of tightening the left-handed thread, so that the gear body 3 and the locking ring 6 form a threaded connection; when the abutment section 37 of the gear body contacts the limiting end face 64 of the locking ring 6, the gear body 3 and the locking ring 6 are fastened and cannot rotate relative to each other; after the anti-debonding is fully dried, the gear body 3 and the locking ring 6 are connected as one.

[0042] In actual use, Figure 1 and Figure 6 As shown, a stepped plug 7 is fixedly arranged in the stepped through hole 16. When a cylindrical rod is passed through the stepped through hole 16 opened on the gear sleeve 1 to abut the locking ring 6 to prevent the locking ring 6 from rotating, and then the locking ring 6 is assembled on the gear body 3, the stepped plug 7 can be arranged in the stepped through hole 16, and the plug and the gear sleeve 1 are connected as a whole by brazing.

[0043] In some embodiments, a cylindrical hole 19 is formed at one end of the tooth sleeve 1 away from the tooth crown 4, and a cover plate 5 is fixedly installed in the cylindrical hole 19. After the cover plate 5 is installed in the cylindrical hole 19, it can be connected as a whole by brazing.

[0044] In summary, the diamond composite sheet of the present application includes a tooth sleeve 1 and a tooth core 2, the tooth sleeve 1 is a hollow structure, the tooth core 2 is partially located in the tooth sleeve 1, and is rotatably connected to the tooth sleeve 1. Since the tooth sleeve 1 is a hollow structure, the tooth core 2 is partially located in the tooth sleeve 1, and the tooth core 2 is rotatably connected to the tooth sleeve 1, the tooth core 2 can be rotated in the tooth sleeve 1, so that when the drill bit is cutting the rock formation, the tooth core 2 can rotate, avoiding a certain area of ​​the tooth core 2 from being in contact with the rock all the time when the rock formation is cut, and being subjected to long-term wear, which can improve the service life of the diamond composite sheet.

[0045] The tooth core 2 includes a stepped tooth body 3 and a tooth crown 4 connected to the tooth body 3; the inner wall of the tooth sleeve 1 is provided with a protruding section 15 for limiting the tooth body 3. The setting of the protruding section 15 can limit the tooth body 3 and prevent the tooth body 3 from falling out of the tooth sleeve 1.

[0046] The diamond composite sheet of the present application also includes a locking ring 6, which is arranged at the end of the tooth body 3 away from the tooth crown 4, and the locking ring 6 is threadedly connected to the tooth body 3, and a "concave" shaped structure matching the protruding section 15 is formed between the locking ring 6 and the tooth body 3. The setting of the locking ring 6 cooperates with the stepped tooth body 3, and a "concave" shaped structure matching the protruding section 15 is formed between the locking ring 6 and the tooth body 3, and cooperates with the protruding section 15 to prevent the tooth body 3 from falling out of the tooth sleeve 1. A stepped through hole 16 is provided on the tooth sleeve 1. The outer wall of the locking ring 6 is provided with an anti-rotation concave surface 61 along the height direction. During use, the cylindrical rod can be used to abut the anti-rotation concave surface 61 of the locking ring 6 to prevent the locking ring 6 from rotating when the locking ring 6 is connected to the tooth body 3 through threads. Specifically, the cylindrical rod is used to abut the anti-rotation concave surface 61 of the locking ring 6, so that the locking ring 6 is kept relatively still, which facilitates the rotation of the locking ring 6 to be connected to the threaded section 38 of the tooth body 3.

[0047] In actual use, a stepped plug 7 is fixedly arranged in the stepped through hole 16. When a cylindrical rod is passed through the stepped through hole 16 opened on the gear sleeve 1 to abut the locking ring 6 to prevent the locking ring 6 from rotating, and then the locking ring 6 is assembled on the gear body 3, the stepped plug 7 can be arranged in the stepped through hole 16, and the plug and the gear sleeve 1 are connected as a whole by brazing.

[0048] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the 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 the specific circumstances.

[0049] 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 such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0050] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent 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 the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A diamond composite sheet, It is characterized in that include: A gear sleeve (1) and a gear core (2); The tooth core (2) comprises a stepped tooth body (3) and a tooth crown (4) connected to the tooth body (3); the tooth core (2) is partially located in the tooth sleeve (1) and is rotatably connected to the tooth sleeve (1); The tooth sleeve (1) is a hollow structure, and the inner wall of the tooth sleeve (1) is provided with a protruding section (15) for limiting the position of the tooth body (3).

2. A diamond composite sheet as claimed in claim 1, Features: The invention also comprises a locking ring (6), wherein the locking ring (6) is arranged at one end of the tooth body (3) away from the tooth crown (4), the locking ring (6) is threadedly connected to the tooth body (3), and a "concave"-shaped structure matching the protruding section (15) is formed between the locking ring (6) and the tooth body (3).

3. A diamond composite sheet as claimed in claim 2, Features: The gear sleeve (1), the gear body (3) and the locking ring (6) are made of hard alloy, and the gear crown (4) is made of polycrystalline diamond.

4. A diamond composite sheet as claimed in claim 2, Features: The tooth body (3) comprises a threaded section (38) connected to the locking ring (6) and a contact section (37) perpendicular to the threaded section (38) and used to contact and limit the locking ring (6).

5. A diamond composite sheet as claimed in claim 4, Features: The tooth body (3) comprises an overlapping section (31) overlapped with the tooth sleeve (1), a base section (32) connected to the overlapping section (31), and a conical section (33) connected to the base section (32), and the tooth crown (4) is fixedly connected to the outer wall of the overlapping section (31).

6. A diamond composite sheet as claimed in claim 2, Features: The gear sleeve (1) is provided with a step-shaped through hole (16).

7. A diamond composite sheet as claimed in claim 6, Features: The outer wall of the locking ring (6) is provided with an anti-rotation concave surface (61) along the height direction.

8. A diamond composite sheet as claimed in claim 5, Features: A tapered hole (12) for matching the tapered section (33) is formed at one end of the tooth sleeve (1), and the tapered hole (12) is connected to the end surface area (11), and the end surface area (11) abuts against the support platform section (32).

9. A diamond composite sheet as claimed in claim 6, Features: A step-shaped plug (7) is fixedly arranged in the step-shaped through hole (16).

10. The diamond composite sheet according to claim 2, Features: A cylindrical hole (19) is formed at one end of the tooth sleeve (1) away from the tooth crown (4), and a cover plate (5) is fixedly arranged in the cylindrical hole (19).

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