Mining three-edge drill rod

Abstract

The utility model provides a mining three-edged drill rod which comprises a drill rod body, a male connector and a female connector, the male connector and the female connector are welded to the two ends of the drill rod body through friction respectively, the interior of the drill rod body is of a hollow structure, the exterior of the drill rod body is of a three-edged structure, and external threads of the male connector are arranged on the middle section of a conical section. The large end of the conical section is provided with a strip-shaped first limiting protrusion, the first limiting protrusion and the external threads are arranged in the same direction, internal threads matched with the external threads are arranged in the female connector, the end of the female connector is provided with a strip-shaped first limiting groove matched with the first limiting protrusion, and the first limiting groove and the internal threads are arranged in the same direction. According to the drill rod, the problems of breakage, deformation and the like of the root of the thread of the male connector can be effectively solved by improving the torsion resistance, the service life of the drill rod is effectively prolonged, and the working efficiency of drilling is improved.

Description

Technical Field

[0001] This utility model belongs to the field of drilling tools, specifically relating to a mining triangular drill rod. Background Technology

[0002] Drill pipes are essential tools for gas drainage drilling operations, requiring excellent comprehensive mechanical and mechanical properties, as their performance directly impacts drilling efficiency. However, in actual use, problems frequently arise such as male connector thread root breakage, severe thread deformation, seizing, and abnormal thread wear. These issues necessitate replacing the drill pipe with a more damaged one, which is not only time-consuming and labor-intensive but also significantly reduces the drill pipe's lifespan.

[0003] In view of this, in order to solve the above problems, this utility model proposes a mining triangular drill rod with improved torsional resistance at the connection between the male and female connectors. By improving the torsional resistance, this drill rod can effectively reduce problems such as breakage and deformation at the root of the male connector thread, thereby effectively improving the service life of the drill rod and increasing drilling efficiency. Utility Model Content

[0004] This utility model provides a mining triangular drill rod that effectively reduces problems such as thread root fracture and deformation of the male connector by improving its torsional resistance. The specific solution is as follows:

[0005] A mining triangular drill rod includes a drill rod body, a male connector, and a female connector. The male connector and the female connector are respectively friction-welded to both ends of the drill rod body. The drill rod body has a hollow internal structure and a triangular external structure. The external thread of the male connector is located in the middle section of a conical segment. The large end of the conical segment has a strip-shaped first limiting protrusion, which is arranged in the same direction as the external thread. The female connector has an internal thread that matches the external thread. The end of the female connector has a strip-shaped first limiting groove that mates with the first limiting protrusion, which is arranged in the same direction as the internal thread.

[0006] Furthermore, the conical section of the male connector has a strip-shaped second limiting protrusion in the same direction as the external thread at its small end, and the inner end of the female connector has a second limiting groove that mates with the second limiting protrusion. The outer side of the second limiting protrusion is lower than the outer side of the external thread.

[0007] Furthermore, the conical section between the second limiting protrusion and the external thread is provided with an annular first sealing groove, and the second limiting groove is provided with an annular second sealing groove between the internal thread. The first sealing groove and the second sealing groove are opposite to each other and are provided with a sealing ring inside.

[0008] Furthermore, multiple inclined grooves are spaced apart on each edge of the drill pipe body. The high end of the groove is located on the female connector side and the low end is located on the male connector side. The groove width at the high end of the groove is greater than the groove width at the low end.

[0009] Furthermore, the outer side of the first limiting protrusion is higher than the outer side of the external thread.

[0010] Furthermore, the drill pipe body, male connector, female connector, first limiting protrusion and second limiting protrusion are all made of 42CrMo ultra-high strength alloy steel.

[0011] The beneficial effects of this utility model are:

[0012] This utility model discloses a mining triangular drill rod. By setting a first limiting protrusion and a second limiting protrusion before and after the conical section of the male connector, and setting a first limiting groove and a second limiting groove at the end and inside of the female connector, when the male connector is connected to the female connector of the drill rod, the first limiting protrusion and the second limiting protrusion abut against the groove walls of the first limiting groove and the second limiting groove, respectively. This can improve the torsional resistance of the drill rod during rotation, thereby avoiding torsional deformation under heavy load during drilling, reducing the occurrence of thread root fracture of the male connector, and thus effectively extending the service life of the drill rod and improving the drilling efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a side view of the present invention.

[0015] Figure 3 for Figure 2 Sectional view of AA.

[0016] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0017] Figure 5 This is a top view of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Drill pipe body; 2. Male connector; 3. Female connector; 4. External thread; 5. First limiting protrusion; 6. Internal thread; 7. First limiting groove; 8. Second limiting protrusion; 9. Second limiting groove; 10. First sealing groove; 11. Second sealing groove; 12. Groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] See Figure 1-5A mining triangular drill rod includes a drill rod body 1, a male connector 2, and a female connector 3. The male connector 2 and the female connector 3 are respectively friction-welded to both ends of the drill rod body 1. The drill rod body 1 has a hollow internal structure and a triangular external structure. The hollow structure facilitates the delivery of flushing fluid and the removal of drill cuttings, while also reducing the overall weight and the labor intensity of the operators. The external thread 4 of the male connector 2 is located in the middle section of the conical section. The large end of the conical section has a strip-shaped first limiting protrusion 5. The first limiting protrusion 5 is arranged in the same direction as the external thread 4. The female connector 3 is provided with an internal thread 6 that is compatible with the external thread 4. The end of the female connector 3 is provided with a strip-shaped first limiting groove 7 that cooperates with the first limiting protrusion 5. The first limiting groove 7 is arranged in the same direction as the internal thread 6. The two drill rods are connected by screwing the male connector 2 of one drill rod to the female connector 2 of the other drill rod. When the external thread 4 and the internal thread 6 are connected, the first limiting protrusion 5 just abuts against the groove wall of the first limiting groove 7, thereby improving the torsional resistance.

[0021] The conical section of the male connector 2 has a strip-shaped second limiting protrusion 8 in the same direction as the external thread 4 at its small end. The inner end of the female connector 3 has a second limiting groove 9 that mates with the second limiting protrusion 8. The outer side of the second limiting protrusion 8 is lower than the outer side of the external thread 4. The setting of the second limiting protrusion 8 further enhances the torsional resistance of the connection part of the two drill rods.

[0022] The conical section between the second limiting protrusion 8 and the external thread 4 is provided with an annular first sealing groove 10, and the second limiting groove 9 and the internal thread 6 are provided with an annular second sealing groove 11. The first sealing groove 10 and the second sealing groove 11 are opposite each other and are provided with sealing rings. The sealing rings enhance the sealing between the two connected drill rods and can prevent leakage when conveying flushing fluid.

[0023] Multiple inclined grooves 12 are spaced apart on each edge of the drill pipe body 1. The high end of the groove 12 is located on the side of the female connector 3 and the low end is located on the side of the male connector 2. The opening of the low end faces the same direction as the drilling direction of the drill pipe. The groove width of the high end of the groove 12 is greater than the groove width of the low end. Setting the groove 12 so that the width of the high end is lower than the width of the low end can effectively enhance the spiral thrust of the drill pipe body 1 and improve the drilling slag removal capacity, and effectively reduce the risk of stuck drill during drilling.

[0024] The outer side of the preferred first limiting protrusion 5 is higher than the outer side of the external thread 4.

[0025] The drill pipe body 1, male connector 2, female connector 3, first limiting protrusion 5, and second limiting protrusion 8 are all made of 42CrMo ultra-high strength alloy steel, which can improve the service life of the drill pipe through the good toughness and wear resistance of the material.

[0026] The working principle of this utility model is as follows: When two connected drill rods are connected, the sealing ring is first placed on the first sealing groove 10. The external thread 4 of the male connector 2 of one drill rod is screwed into the internal thread 6 of the female connector 3 of the other drill rod. When the external thread 4 and the internal thread 6 are tightened, the outer side of the sealing ring is inserted into the second sealing groove 11, the front end of the first limiting protrusion 5 abuts against the groove wall of the first limiting groove 7, and the second limiting protrusion 8 abuts against the groove wall of the second limiting groove 9. The setting of the first limiting protrusion 5 and the second limiting protrusion 8 can effectively improve the torsional resistance of the two connected drill rods, thereby avoiding torsional deformation under heavy load during drilling, reducing the occurrence of thread root breakage of the male connector 2, and thus effectively extending the service life of the drill rod, reducing the replacement frequency of the drill rod, and improving the drilling efficiency.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A triangular drill rod for mining, characterized in that: The drill pipe includes a drill pipe body (1), a male connector (2) and a female connector (3). The male connector (2) and the female connector (3) are respectively friction-welded to both ends of the drill pipe body (1). The drill pipe body (1) has a hollow internal structure and a triangular external structure. The external thread (4) of the male connector (2) is located in the middle section of the conical section. The large end of the conical section is provided with a strip-shaped first limiting protrusion (5). The first limiting protrusion (5) is arranged in the same direction as the external thread (4). The female connector (3) is provided with an internal thread (6) that matches the external thread (4). The end of the female connector (3) is provided with a strip-shaped first limiting groove (7) that matches the first limiting protrusion (5). The first limiting groove (7) is arranged in the same direction as the internal thread (6).

2. A mining triangular drill rod according to claim 1, characterized in that: The male connector (2) has a strip-shaped second limiting protrusion (8) at the small end of the conical section that is in the same direction as the external thread (4). The inner end of the female connector (3) has a second limiting groove (9) that cooperates with the second limiting protrusion (8). The outer side of the second limiting protrusion (8) is lower than the outer side of the external thread (4).

3. A mining triangular drill rod according to claim 2, characterized in that: The conical section between the second limiting protrusion (8) and the external thread (4) is provided with an annular first sealing groove (10), and the second limiting groove (9) and the internal thread (6) are provided with an annular second sealing groove (11). The first sealing groove (10) and the second sealing groove (11) are opposite to each other and are provided with a sealing ring inside.

4. A mining triangular drill rod according to claim 1, characterized in that: The drill pipe body (1) has multiple inclined grooves (12) spaced apart on each edge. The high end of the groove (12) is located on the side of the female connector (3) and the low end is located on the side of the male connector (2). The groove width of the high end of the groove (12) is greater than the groove width of the low end.

5. A mining triangular drill rod according to claim 1, characterized in that: The outer side of the first limiting protrusion (5) is higher than the outer side of the external thread (4).

6. A mining triangular drill rod according to claim 2, characterized in that: The drill pipe body (1), male connector (2), female connector (3), first limiting protrusion (5) and second limiting protrusion (8) are all made of 42CrMo ultra-high strength alloy steel.

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