Novel double-channel drill rod

Abstract

According to the technical scheme, the novel double-channel drill rod comprises an outer drill rod body and an inner drill rod body, a spiral conveying blade is welded to the inner surface of the outer drill rod body, the inner drill rod body is welded to the inner surface of the spiral conveying blade, a center channel is formed in the middle of the inner drill rod body, and a conical connecting end A is arranged on the outer surface of one end of the outer drill rod body. A conical connecting hole A is formed in the end, away from the conical connecting end A, of the outer drill rod, and external threads are arranged on the outer surface, located at the conical connecting end A, of the outer drill rod. A novel double-channel drill rod solves the problems that an existing drill rod is generally composed of a hollow steel pipe, a medium enters through a center through hole, drilling cuttings are discharged along a gap between the outer surface of the steel pipe and a drill hole, in the process, flowing of the medium and the drilling cuttings can damage the drill hole, the hole diameter is enlarged or deviated, and the drilling efficiency is high. The problems that drill jamming and threaded connection breakage are easily caused are solved, the size of a drill hole can be ensured, deviation is reduced, and the material discharging efficiency is improved while self-positioning is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling rigs, and specifically to a new type of double-channel drill pipe. Background Art

[0002] A drilling rig is a device used to drill holes in soil, rock, or other underground materials, and is often used in fields such as geological exploration, construction engineering, and oil drilling. The development trend of drilling rigs includes intelligence, automation, and high efficiency. Modern drilling rigs are often equipped with advanced control systems, sensors, and data acquisition devices, which can achieve functions such as remote monitoring, automated drilling, data recording, and analysis, improving the operation efficiency and safety of the drilling rig. The use of a drilling rig requires the use of drill pipes.

[0003] Existing drill pipes are usually composed of hollow steel pipes. The medium enters through the central through-hole, and the drill cuttings are discharged along the gap between the outer surface of the steel pipe and the borehole. During this process, the flow of the medium and the drill cuttings will cause damage to the borehole, resulting in an enlarged or offset borehole diameter, and easily causing drill sticking and fracture of the threaded connection. For this reason, we propose a new type of double-channel drill pipe. Summary of the Invention

[0004] The purpose of the present invention is to provide a new type of double-channel drill pipe, achieving the effect of one channel for liquid inlet and the other channel for liquid discharge, so as to solve the problem that existing drill pipes are usually composed of hollow steel pipes, the medium enters through the central through-hole, and the drill cuttings are discharged along the gap between the outer surface of the steel pipe and the borehole. During this process, the flow of the medium and the drill cuttings will cause damage to the borehole, resulting in an enlarged or offset borehole diameter, and easily causing drill sticking and fracture of the threaded connection.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A new type of double-channel drill pipe, including an outer drill pipe and an inner drill pipe. A spiral conveyor blade is welded and installed on the inner surface of the outer drill pipe, and the inner drill pipe is welded and installed on the inner surface of the spiral conveyor blade. A central channel is provided in the middle of the inner drill pipe. A tapered connection end A is provided on the outer surface of one end of the outer drill pipe, and a tapered connection hole A is provided at the end of the outer drill pipe away from the tapered connection end A.

[0006] Preferably, an external thread is provided on the outer surface of the outer drill pipe at the tapered connection end A, and an internal thread is provided on the inner surface of the outer drill pipe at the tapered connection hole A. The external thread and the internal thread can be threadedly engaged.

[0007] Preferably, a tapered connection end B is provided on one side of one end of the inner drill pipe close to the tapered connection end A, and a tapered connection hole B is provided at the end of the inner drill pipe away from the tapered connection end B. The tapered connection end B and the tapered connection hole B are in tapered fit.

[0008] Preferably, the tapered connection end A and the tapered connection hole A are in tapered fit.

[0009] Preferably, a sealing groove is provided on the inner surface of the conical connection hole B, and a sealing ring is provided on the inner surface of the sealing groove.

[0010] Preferably, there are two sealing grooves in total, and the two sealing grooves are evenly distributed at the position of the inner surface of the conical connection hole B.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. By providing the outer drill pipe, the inner drill pipe and the spiral conveying blade, the present invention achieves the effect of liquid inlet through one channel and liquid discharge through another channel, so as to solve the problem that the existing drill pipes are usually composed of hollow steel pipes, the medium enters through the central through hole, and the drill cuttings are discharged along the gap between the outer surface of the steel pipe and the drilling hole. During this process, the flow of the medium and the drill cuttings will cause damage to the drilling hole, resulting in an enlarged or offset hole diameter, which is likely to cause sticking of the drill and breakage of the threaded connection. It can ensure the size of the drilling hole, reduce the deviation, and improve the material discharge efficiency while achieving self-positioning.

[0013] 2. By welding and setting the spiral conveying blade on the inner surface of the outer drill pipe, the present invention achieves the effect of ultra-long-distance material conveying, so as to solve the problem that the existing drill pipes have no inner spiral structure, which is not only not conducive to slag discharge but also easily leads to blockage of the slag discharge channel, reducing the probability of blockage of the slag discharge channel, and thus ensuring the normal conveying of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front view structural schematic diagram of the present invention;

[0015] Figure 2 is the sectional view structural schematic diagram of the present invention;

[0016] Figure 3 is Figure 2 the enlarged structural schematic diagram of A therein;

[0017] Figure 4 is Figure 2 the enlarged structural schematic diagram of B therein.

[0018] Reference numerals: 1. Outer drill pipe; 2. External thread; 3. Conical connection end A; 4. Spiral conveying blade; 5. Inner drill pipe; 6. Internal thread; 7. Conical connection hole A; 8. Conical connection hole B; 9. Sealing groove; 10. Sealing ring; 11. Central channel; 12. Conical connection end B. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following further describes the technical solutions of the present invention with reference to the drawings and specific embodiments.

[0020] Embodiment 1

[0021] As Figures 1-4As shown, in order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new type of double-channel drill rod, including an outer drill rod 1 and an inner drill rod 5, the inner surface of the outer drill rod 1 is welded with a spiral conveying blade 4, the inner surface of the spiral conveying blade 4 is welded with the inner drill rod 5, a central channel 11 is arranged in the middle of the inner drill rod 5, a conical connecting end A3 is arranged on the outer surface of one end of the outer drill rod 1, a conical connecting hole A7 is arranged on the end of the outer drill rod 1 away from the conical connecting end A3, and a conical connecting hole A7 is arranged on the outer surface of the outer drill rod 1 at the conical connecting end A3 External thread 2, the outer drill rod 1 is provided with an internal thread 6 on the inner surface of the tapered connecting hole A7, the external thread 2 and the internal thread 6 can be connected by threaded engagement, which is convenient for connecting the outer drill rod 1, the tapered connecting end A3 is taperedly matched with the tapered connecting hole A7 to prevent leakage of slag and gas, one end of the inner drill rod 5 is provided with a tapered connecting end B12 near the tapered connecting end A3, and the end of the inner drill rod 5 away from the tapered connecting end B12 is provided with a tapered connecting hole B8, and the tapered connecting end B12 is taperedly matched with the tapered connecting hole B8.

[0022] The working principle of a new dual-channel drill rod based on Example 1 is: after the present invention is prepared, before use, multiple outer drill rods 1 are connected through the external thread 2 and the internal thread 6, and the inner drill rods 5 are connected to each other through the tapered connecting end B12 and the tapered connecting hole B8 of the tapered matching, and then the present invention can be used. When in use, the medium is transmitted through the central channel 11, and slag and gas are discharged through the gap between the outer drill rod 1 and the inner drill rod 5 and the spiral conveying blade 4. At this point, the working process of this equipment is completed.

[0023] Embodiment 2

[0024] like Figure 2 and Figure 3 As shown, a new dual-channel drill pipe proposed by the present invention, compared with the first embodiment, this embodiment also includes: a sealing groove 9 is provided on the inner surface of the tapered connecting hole B8, and a sealing ring 10 is provided on the inner surface of the sealing groove 9, and the connecting column is sealed by two sealing rings 10, and there are two sealing grooves 9 in total, and the two sealing grooves 9 are evenly distributed on the inner surface of the tapered connecting hole B8.

[0025] In this embodiment, when multiple inner drill rods 5 are connected, the conical connecting end B12 is conically matched with the conical connecting hole B8 to squeeze the sealing ring 10, and the connection between the multiple inner drill rods 5 is sealed by the sealing ring 10 to facilitate the input of the medium.

[0026] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A new type of double-channel drill pipe, comprising an outer drill pipe (1) and an inner drill pipe (5), characterized in that: A spiral conveyor blade (4) is welded and installed on the inner surface of the outer drill pipe (1), an inner drill pipe (5) is welded and installed on the inner surface of the spiral conveyor blade (4), a central channel (11) is provided in the middle of the inner drill pipe (5), a conical connection end A (3) is provided on the outer surface of one end of the outer drill pipe (1), and a conical connection hole A (7) is provided at one end of the outer drill pipe (1) away from the conical connection end A (3).

2. The novel double-channel drill pipe according to claim 1, wherein: An external thread (2) is provided on the outer surface of the outer drill pipe (1) at the conical connection end A (3), an internal thread (6) is provided on the inner surface of the outer drill pipe (1) at the conical connection hole A (7), and the external thread (2) and the internal thread (6) can be connected by screw thread engagement.

3. A novel double-channel drill pipe according to claim 1, characterized in that: A conical connection end B (12) is provided on one side of one end of the inner drill pipe (5) close to the conical connection end A (3), a conical connection hole B (8) is provided at one end of the inner drill pipe (5) away from the conical connection end B (12), and the conical connection end B (12) and the conical connection hole B (8) are in conical fit.

4. A novel double-channel drill pipe according to claim 1, characterized in that: The conical connection end A (3) and the conical connection hole A (7) are in conical fit.

5. A novel double-channel drill pipe according to claim 1, characterized in that: A sealing groove (9) is provided on the inner surface of the conical connection hole B (8), and a sealing ring (10) is provided on the inner surface of the sealing groove (9).

6. A novel double-channel drill pipe according to claim 5, characterized in that: There are two sealing grooves (9) in total, and the two sealing grooves (9) are evenly distributed at the position of the inner surface of the conical connection hole B (8).

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