PDC drill bit connecting structure with high stability
By combining the guiding and locking structures, the problem of loosening in traditional threaded connections is solved, achieving a stable connection between the PDC drill bit and the drill pipe, and improving the stability and safety of drilling operations.
Patent Information
- Application Number
- CN202520045654.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-01-09
AI Technical Summary
Traditional PDC drill bits and drill pipes with simple threaded connections are prone to loosening due to vibration and impact during long-term drilling, resulting in unstable connections and affecting drilling efficiency and safety.
The design employs a combination of guiding and locking structures, including the sliding connection between the protrusion and the through groove in the guiding structure, and the magnetic connection between the locking screw and the fastening ring in the locking structure. This enhances the stability of the protrusion and the drill pipe, and enables quick replacement and secure locking through the fastening bolts.
It improves the connection stability between the PDC drill bit and the drill pipe, prevents loosening, enhances locking efficiency, and ensures the stability and safety of the drilling process.
Smart Images
Figure CN223577871U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to drill bit connecting technical field especially high stability's PDC drill bit connecting structure. BACKGROUND
[0002] PDC drill bit is the preferred tool in the field of oil drilling, and is known for its high-hardness polycrystalline diamond compact cutting teeth, showing excellent wear resistance, high drilling speed, low energy consumption, high precision and long service life advantages, which can adapt to various strata, significantly improve drilling efficiency and precision, reduce energy consumption and cost, and is an indispensable high-performance tool in drilling operations.
[0003] However, the PDC drill bit and the drill pipe connected by the traditional simple thread connection method are prone to loosening of the thread connection due to vibration and impact during long-time drilling, which causes unstable connection between the PDC drill bit and the drill pipe, reduces drilling efficiency and safety, and affects drilling precision and service life of the drill bit.
[0004] Therefore, in view of the problem that the PDC drill bit and the drill pipe connected by the traditional simple thread connection method are prone to loosening of the thread connection due to vibration and impact during long-time drilling, a high-stability PDC drill bit connecting structure can be designed to achieve quick replacement and stable locking of the PDC drill bit, improve locking efficiency, and effectively prevent loosening of the thread connection. SUMMARY
[0005] In order to overcome the problem that the PDC drill bit and the drill pipe connected by the traditional simple thread connection method are prone to loosening of the thread connection due to vibration and impact during long-time drilling.
[0006] The technical scheme of the utility model is: a high-stability PDC drill bit connecting structure, comprising a PDC drill bit and a drill pipe, the upper end of the PDC drill bit is integrally fixedly connected with a protruding block, the lower end of the drill pipe is provided with a through slot matched with the protruding block, the outer wall of the protruding block and the inner wall of the through slot are jointly provided with a guide structure, the protruding block is slidably connected in the through slot through the guide structure, a screw hole is formed around the outer wall of the drill pipe, a locking structure is installed in the screw hole, the protruding block is connected with the drill pipe through the locking structure, the upper end of the PDC drill bit is integrally fixedly connected with a first fixing ring, the lower end of the drill pipe is integrally fixedly connected with a second fixing ring, and the first fixing ring and the second fixing ring are connected through a fastening bolt.
[0007] As an option, the guide structure comprises a protruding rail, the outer wall of the protruding block is integrally fixedly connected with the protruding rail around the circumference, the inner wall of the drill pipe is provided with a sliding slot matched with the protruding rail around the circumference, and the protruding rail is slidably connected in the sliding slot.
[0008] As preferred, the locking structure comprises a locking screw, the locking screw is threadedly connected in the screw hole, one end of the locking screw is integrally fixedly connected with a knob, the outer wall of the protruding block is provided with a insertion hole, and the locking screw is inserted into the insertion hole.
[0009] As preferred, the outer wall of the locking screw is threadedly connected with a fastening ring, and the side wall of the fastening ring is provided with anti-skid lines.
[0010] As preferred, magnets are arranged in the locking screw and the insertion hole, and the locking screw and the insertion hole are magnetically connected.
[0011] As preferred, the end of the locking screw is fixedly connected with a tapered block, and a tapered expansion hole matched with the tapered block is arranged in the insertion hole.
[0012] As preferred, the protruding block is fixedly connected with a reinforcing rib at the connection position of the protruding block and the PDC drill bit, the reinforcing rib is uniformly distributed along the circumference of the protruding block, and the inner wall of the drill pipe is provided with an insertion slot matched with the reinforcing rib.
[0013] The utility model discloses the beneficial effect: compared with the traditional screw connection means, the scheme cooperates with the guiding structure and the tight locking structure, not only guarantees that the protruding block can smoothly slide into the through slot and effectively prevents the rotation of the PDC drill bit, and simultaneously realizes the effect that the PDC drill bit is quickly replaced and stably locked, improves the locking efficiency, effectively prevents the occurrence of the screw connection loosening phenomenon, thereby embodying higher stability in the well drilling operation. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 The utility model discloses a high-stability PDC drill bit connecting structure three-dimensional structure schematic diagram is shown.
[0015] Figure 2 The utility model discloses a high-stability PDC drill bit connecting structure first split schematic diagram of three-dimensional structure is shown.
[0016] Figure 3 The utility model discloses a high-stability PDC drill bit connecting structure second split schematic diagram of three-dimensional structure is shown.
[0017] Figure 4 The utility model discloses a high-stability PDC drill bit connecting structure locking structure three-dimensional structure schematic diagram is shown.
[0018] Figure 5 The utility model discloses a high-stability PDC drill bit connecting structure locking structure cross section is shown.
[0019] Explanation of reference signs: 1, PDC drill bit; 2, drill rod; 3, protruding block; 4, through slot; 5, screw hole; 6, first fixing ring; 7, second fixing ring; 8, protruding rail; 9, sliding groove; 10, locking screw; 11, knob; 12, insertion hole; 13, fastening ring; 14, conical block; 15, conical expansion hole; 16, reinforcing rib; 17, insertion slot. DETAILED DESCRIPTION
[0020] The utility model is further explained below in combination with the drawings and examples.
[0021] Please refer to Figure 1 - Figure 5 The utility model provides a kind of embodiment: the PDC drill bit connecting structure of high stability, including PDC drill bit 1 and drill rod 2, the upper end of PDC drill bit 1 integrally fixedly connected with protruding block 3, the lower end of drill rod 2 is equipped with the through slot 4 of adaptation with protruding block 3, the outer wall of protruding block 3 and the inner wall of through slot 4 are equipped with guiding structure, protruding block 3 is slidably connected in through slot 4 by guiding structure, the outer wall of drill rod 2 is equipped with screw hole 5 around a week, locking structure is installed in screw hole 5, protruding block 3 is connected with drill rod 2 by locking structure, the upper end of PDC drill bit 1 integrally fixedly connected with first fixing ring 6, the lower end of drill rod 2 integrally fixedly connected with second fixing ring 7, first fixing ring 6 and second fixing ring 7 are connected by fastening bolt, protruding block 3 plays the role of being connected with drill rod 2, the shape and size of protruding block 3 are adapted with the through slot 4 of the lower end of drill rod 2, ensure that protruding block 3 can be smoothly slid into through slot 4, guiding structure is installed between the outer wall of protruding block 3 and the inner wall of through slot 4, not only play the role of guiding protruding block 3 in through slot 4 sliding, also avoid that protruding block 3 rotates in through slot 4, to improve the stability and reliability of connection, locking structure not only firmly connects protruding block 3 and drill rod 2 together, also facilitate to replace PDC drill bit 1, first fixing ring 6 and second fixing ring 7 are connected together by fastening bolt, further enhance the connection stability between PDC drill bit 1 and drill rod 2.
[0022] Please refer to Figure 2 - Figure 3 In the embodiment, guiding structure includes protruding rail 8, the outer wall of protruding block 3 is integrally fixedly connected with protruding rail 8 around a week, the inner wall of drill rod 2 is equipped with the sliding groove 9 of adaptation with protruding rail 8 around a week, protruding rail 8 is slidably connected in sliding groove 9, protruding rail 8 plays the role of guiding and positioning in sliding connection process, ensure that protruding rail 8 can be smoothly slid into sliding groove 9, and keep stable guiding during sliding, simultaneously, since protruding rail 8 is embedded in sliding groove 9, so that protruding block 3 will not rotate relative to rotating rod, to improve the connection stability between PDC drill bit 1 and drill rod 2.
[0023] Please refer to Figure 2 、 Figure 4 andFigure 5 In the embodiment, the locking structure comprises a locking screw 10, the locking screw 10 is threadedly connected in the screw hole 5, one end of the locking screw 10 is integrally fixedly connected with a knob 11, an insertion hole 12 is formed in the outer wall of the lug 3, the locking screw 10 is inserted into the insertion hole 12, a fastening ring 13 is threadedly connected with the threaded outer wall of the locking screw 10, anti-skid lines are arranged on the side wall of the fastening ring 13, magnets are arranged in the locking screw 10 and the insertion hole 12, the locking screw 10 and the insertion hole 12 are magnetically connected, a tapered block 14 is fixedly connected with the end of the locking screw 10, a tapered expansion hole 15 that is adapted to the tapered block 14 is arranged in the insertion hole 12, the locking screw 10 is fixed in the screw hole 5 through thread connection, the knob 11 provides the torque required for rotating the locking screw 10, so that the user can conveniently operate the locking screw 10 by rotating the knob 11, the insertion hole 12 is used for receiving the hole of the locking screw 10, which ensures that the locking screw 10 can be closely inserted into the insertion hole 12, realizes the locking effect, the fastening ring 13 is used for further increasing the locking force of the locking screw 10, preventing the locking screw 10 from loosening under vibration or impact, the anti-skid lines are arranged on the side wall of the fastening ring 13, which increase the friction between the fastening ring 13 and the user's fingers, facilitating the user to rotate the fastening ring 13, the magnets are arranged in the locking screw 10 and the insertion hole 12, and they are attracted to each other through magnetic connection, which increases the connection strength between the locking screw 10 and the insertion hole 12, the tapered block 14 is a component fixedly connected with the end of the locking screw 10, which is used for providing additional locking force in the locking process, the design of the tapered block 14 enables the hole wall to gradually decrease when the tapered block 14 is inserted into the tapered expansion hole 15, thereby increasing the friction between the locking screw 10 and the insertion hole 12, which improves the stability of the locking structure and makes the locking screw 10 more difficult to loosen under external force.
[0024] Please refer to Figure 2 In the embodiment, the lug 3 is fixedly connected with a reinforcing rib 16 at the connection with the PDC drill bit 1, the reinforcing rib 16 is uniformly distributed along the circumference of the lug 3, the second fixing ring 7 and the inner wall of the drill rod 2 are provided with an insertion slot 17 that is adapted to the reinforcing rib 16, the reinforcing rib 16 is a structural component fixedly connected at the connection of the lug 3 and the PDC drill bit 1, which is uniformly distributed along the circumference of the lug 3, forming a plurality of radially extending ribs, the presence of the reinforcing rib 16 increases the strength and rigidity of the connection of the lug 3 and the PDC drill bit 1, thereby improving the stability and durability of the entire connection structure. In the drilling process, the reinforcing rib 16 can withstand a large torque and axial force, preventing the connection from breaking or deforming, the insertion slot 17 is used for receiving the reinforcing rib 16, the shape and size of the insertion slot 17 are matched with the reinforcing rib 16, ensuring that the reinforcing rib 16 can be closely inserted and fixed in the insertion slot 17.
[0025] In the execution of the job flow, first, the convex block 3 on the PDC drill bit 1 is introduced into the through slot 4 of the drill pipe 2, at this time, the convex rail 8 arranged on the convex block 3 will smoothly slide along the sliding groove 9, ensuring that the PDC drill bit 1 does not rotate inside the drill pipe 2;
[0026] Subsequently, the locking screw 10 is driven to advance forward in the threaded hole 5 by rotating the knob 11 until it is inserted into the preset insertion hole 12 of the convex block 3, then, the locking screw 10 is firmly fixed by rotating the fastening ring 13, in the process, the locking screw 10 and the magnet built in the insertion hole 12 generate mutual attraction, thereby further enhancing the connection firmness between the locking screw 10 and the insertion hole 12, at the same time, the tapered block 14 at the end of the locking screw 10 will cause the hole wall to shrink when gradually inserted into the tapered expansion hole 15, thereby increasing the friction between the locking screw 10 and the insertion hole 12;
[0027] Finally, the first fixing ring 6 and the second fixing ring 7 are tightly connected by using the fastening bolt, so as to realize the stable connection of the PDC drill bit 1 and the drill pipe 2.
[0028] Through the above steps, compared with the traditional threaded connection means, the scheme cooperates the guide structure and the locking structure, not only ensures that the convex block 3 can smoothly slide into the through slot 4 and effectively prevents the rotation of the PDC drill bit 1, but also realizes the quick replacement and stable locking of the PDC drill bit 1, improves the locking efficiency, effectively prevents the loosening phenomenon of the threaded connection, thereby reflecting higher stability in the drilling operation, and solves the problem that the PDC drill bit 1 and the drill pipe 2 connected by the traditional simple threaded connection are prone to loosening of the threaded connection due to vibration and impact during long-time drilling.
[0029] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the purpose of the utility model.
Claims
1. A highly stable PDC drill bit connection structure, comprising a PDC drill bit (1) and a drill rod (2); characterized in that: The upper end of the PDC drill bit (1) is integrally fixedly connected with a protrusion (3), and the lower end of the drill rod (2) is provided with a through groove (4) that matches the protrusion (3). The outer wall of the protrusion (3) and the inner wall of the through groove (4) are jointly installed with a guide structure. The protrusion (3) is slidably connected to the through groove (4) through the guide structure. The outer wall of the drill rod (2) is provided with a screw hole (5) around its perimeter. A locking structure is installed in the screw hole (5). The protrusion (3) is connected to the drill rod (2) through the locking structure. The upper end of the PDC drill bit (1) is integrally fixedly connected with a first fixing ring (6), and the lower end of the drill rod (2) is integrally fixedly connected with a second fixing ring (7). The first fixing ring (6) and the second fixing ring (7) are connected by fastening bolts.
2. The highly stable PDC drill bit connection structure according to claim 1, characterized in that: The guide structure includes a convex rail (8), and the outer wall of the convex block (3) is integrally fixedly connected to the convex rail (8). The inner wall of the drill rod (2) is provided with a groove (9) that is adapted to the convex rail (8), and the convex rail (8) is slidably connected in the groove (9).
3. The highly stable PDC drill bit connection structure according to claim 2, characterized in that: The locking structure includes a locking screw (10), a locking screw (10) is internally threaded in the screw hole (5), a knob (11) is integrally fixedly connected to one end of the locking screw (10), and an insertion hole (12) is opened on the outer wall of the protrusion (3), and the locking screw (10) is inserted into the insertion hole (12).
4. The highly stable PDC drill bit connection structure according to claim 3, characterized in that: The outer thread of the locking screw (10) is connected to a fastening ring (13), and the side wall of the fastening ring (13) is provided with anti-slip texture.
5. The highly stable PDC drill bit connection structure according to claim 4, characterized in that: Magnets are provided in both the locking screw (10) and the socket (12), and the locking screw (10) and the socket (12) are magnetically connected.
6. The highly stable PDC drill bit connection structure according to claim 5, characterized in that: A tapered block (14) is fixedly connected to the end of the locking screw (10), and a tapered expansion hole (15) adapted to the tapered block (14) is provided in the insertion hole (12).
7. The highly stable PDC drill bit connection structure according to claim 6, characterized in that: A reinforcing rib (16) is fixedly connected to the connection between the protrusion (3) and the PDC drill bit (1). The reinforcing rib (16) is evenly distributed along the circumference of the protrusion (3). The second fixing ring (7) and the inner wall of the drill rod (2) are provided with slots (17) that are compatible with the reinforcing rib (16).